System and method for suppressing operating corrosion of condensers

Abstract

The present invention provides a system and method for suppressing operational corrosion of a condenser, the system comprising a compounding system, the compounding system comprising a chemical stock tank for containing hydrogen peroxide stock, a demineralized water tank, a compounding tank connected to the demineralized water tank, and a reagent supply system, the compounding tank having a chemical inlet on its upper surface, the compounding tank having a chemical concentration detector, the compounding tank having a chemical tank connected to the chemical stock tank, a washing tank connected to the demineralized water tank, and a waste liquid tank having a chemical tank on its upper surface, the reagent supply system comprising a reagent supply device, and the chemical concentration detector being electrically connected to the reagent supply system and a control valve for the second demineralized water, respectively. In the system for suppressing operational corrosion of a condenser provided by the present invention, the reagent supply device is used to achieve minute supply, improving the control accuracy of the reagent amount and the control accuracy of the chemical concentration, and further, before each chemical sampling, the reagent supply device is washed and rinsed with chemicals to ensure the concentration of the chemical transported to the compounding tank and prevent the contamination of the compounding tank with other impurities.

Description

Technical Field

[0001] The present invention relates to the technical field of corrosion prevention of condensers, and specifically to a system and method for suppressing the operating corrosion of condensers.

Background Art

[0002] The carbon steel structure of a direct air-cooled condenser is in a high-flow-rate, low-pH-value, and negative-pressure humid steam environment, and is affected by the combined effects of mechanical and chemical factors, resulting in flow-accelerated corrosion. As the main causes of corrosion, the maximum average flow rate of the low-pressure cylinder exhaust can reach 80 m / s, and turbulence occurs due to the pipe fold and diameter change, further locally increasing the flow rate, and amplifying the erosion effect of the initial condensate on the carbon steel surface. When the low-pressure cylinder exhaust condenses in an air-cooled condenser, the redistribution of ammonia and oxygen in the gas-liquid phase occurs. According to Henry's law, most of the ammonia is distributed in the gas phase and it is difficult to dissolve into the liquid film, so the pH value of the condensate becomes low. In addition, trace amounts of hardly volatile corrosive ions (such as Cl

[0004] , SO4 2- etc.) are concentrated in the condensate, further reducing the pH value of the liquid phase, thus promoting the dissolution of the metal oxide film. In a negative-pressure environment, the initial condensate of the low-pressure cylinder exhaust formed on the carbon steel surface is almost oxygen-free, and since the water temperature is 50-70 °C, it is difficult to form a stable protective film on the carbon steel surface, and the erosion resistance is poor.

[0003] How to suppress corrosion is particularly important. Measures such as simply changing the structure of the equipment to avoid sudden changes in the flow state as much as possible, or surface-treating local areas with high-corrosion-resistant materials are clearly not practical for direct air-cooled units already in operation.

[0004] Therefore, for direct air-cooled units already in operation, from a chemical standpoint, the objective of reducing corrosion of the direct air-cooled condenser system is achieved by adding an oxidizing agent with a high liquid-phase distribution coefficient to the exhaust gas of the air-cooled condenser, thereby improving the oxidation-reduction potential of the liquid film on the carbon steel surface, and creating a dense and stable protective oxide film on the metal surface.

[0005] Conventional technology employs a method of supplying pharmaceuticals to a mixing tank using a metering pump, but this method has technical problems such as the concentration of the prepared pharmaceutical being prone to fluctuations, resulting in an unstable and inaccurate concentration. [Overview of the project]

[0006] A first aspect of the present invention provides a system for suppressing operating corrosion of a condenser, thereby solving the technical problem in the prior art where, when a metering pump is used to supply chemicals to a mixing tank, the concentration of the prepared chemical fluctuates greatly, resulting in an unstable and inaccurate chemical concentration.

[0007] A first aspect of the present invention is a system for suppressing operating corrosion of a condenser, comprising a compounding system, the compounding system is A chemical stock tank for storing hydrogen peroxide stock solution, A desalination water tank for storing desalination water, A mixing tank having a chemical inlet on its upper surface, a chemical concentration detector on the mixing tank, a chemical tank, a washing tank and a waste liquid tank on the upper surface of the mixing tank, a chemical transport pipe connecting the chemical tank and the chemical concentrate tank, a chemical control valve on the chemical transport pipe, a first demineralized water transport pipe connecting the washing tank and the demineralized water tank, a second demineralized water transport pipe connecting the mixing tank and the demineralized water tank, and a second demineralized water control valve on the second demineralized water transport pipe, the mixing tank and, A reagent supply system comprising a reagent supply device, the reagent supply device being able to move up and down in a first direction and being movable between the chemical tank, the washing tank, the waste liquid tank and the chemical inlet, The drug concentration detector is electrically connected to the reagent supply system and the second desalinated water control valve, respectively.

[0008] Furthermore, the chemical tank, the washing tank, and the waste liquid tank are arranged sequentially in a second direction, and the reagent supply system includes a reagent supply arm, the reagent supply arm is provided on the mixing tank, the reagent supply arm is located above the chemical tank, the washing tank, and the waste liquid tank, and extends in the second direction. The reagent supply device is slidably connected to the reagent supply arm along the first and second directions, respectively, or the reagent supply device is fixedly connected to the reagent supply arm, the reagent supply arm is slidably connected to the mixing tank along the first direction, and the reagent supply arm is extendable and retractable along the second direction. Here, the second direction is parallel to the upper surface of the mixing tank and perpendicular to the first direction.

[0009] Furthermore, a drug control valve is provided in the drug transport piping, a first pressure sensor is provided between the drug tank and the mixing tank, the first pressure sensor is electrically connected to the drug control valve, and the first pressure sensor is configured to open the drug control valve when the pressure value of the drug tank detected by the first pressure sensor is less than a first preset pressure value, and to close the drug control valve when the pressure value of the drug tank detected by the first pressure sensor is greater than a second preset pressure value, where the first preset pressure value is less than the second preset pressure value, and / or, the first demineralized water transport piping is provided with a first demineralized water control valve, a second pressure sensor is provided between the washing tank and the mixing tank, the second pressure sensor is electrically connected to the first demineralized water control valve, and the second pressure sensor is configured to open the first demineralized water control valve when the pressure value of the washing tank detected by the second pressure sensor is less than a third preset pressure value, and to close the first demineralized water control valve when the pressure value of the washing tank detected by the second pressure sensor is greater than a fourth preset pressure value, where the third preset pressure value is less than the fourth preset pressure value, and / or, the second demineralized water transport piping is provided with a demineralized water atomizer, a second demineralized water pump, and a first back pressure valve, wherein the demineralized water atomizer is located within the mixing tank, the first back pressure valve is provided in piping connected to the outlet end of the second demineralized water pump, and both the second demineralized water pump and the first back pressure valve are electrically connected to the second demineralized water control valve. and / or, a level gauge is provided on the top surface of the mixing tank, the level gauge is used to detect the liquid level in the mixing tank, and the level gauge is electrically connected to the drug concentration detector, the reagent supply system, and the second desalination water control valve, respectively. and / or, a return liquid pipe is provided between the drug discharge end of the drug concentration detector and the mixing tank, a return liquid pump is provided in the return liquid pipe, and the return liquid pump is electrically connected to the drug concentration detector. and / or, the mixing tank is provided with a chemical discharge pipe and a thermometer, the chemical discharge pipe is located at the bottom of the mixing tank, the chemical discharge pipe is provided with a drain control valve, the thermometer is used to detect the chemical temperature in the mixing tank, the thermometer is electrically connected to the drain control valve, and the thermometer and the drain control valve are configured to open the drain control valve to drain the liquid and open the second desalination water control valve to perform cooling by adding water if the chemical temperature in the mixing tank detected by the thermometer is greater than a first temperature preset value.

[0010] Furthermore, the system for suppressing the operating corrosion of the condenser as described above also includes a chemical injection system, which includes a chemical injection pipe, one end of which is connected to the mixing tank and the other end of which is connected to the exhaust pipe, and a first chemical injection control valve, a second back pressure valve, a chemical injection flow meter, and a chemical injection atomizing nozzle are arranged sequentially in the chemical injection pipe along the direction of chemical transport, and the chemical injection atomizing nozzle is provided in the exhaust pipe.

[0011] Furthermore, the system for suppressing the operating corrosion of the condenser described above also includes a chemical monitoring system, the chemical monitoring system includes a condensate sampling system, the condensate sampling system includes a condensate collection tank, a first condensate transport pipe and a second condensate transport pipe, the first condensate transport pipe is connected between the exhaust pipe and the water supply end of the condensate collection tank, the second condensate transport pipe is connected to the water outlet end of the condensate collection tank, the second condensate transport pipe is provided with an iron detector for detecting the iron concentration in the condensate, the iron detector is electrically connected to the chemical injection flow meter, and the iron detector and the chemical injection flow meter are configured to increase the flow rate of the chemical injection flow meter when the iron concentration in the condensate detected by the iron detector is greater than a preset iron concentration value.

[0012] Furthermore, the system for suppressing the operating corrosion of the condenser described above also includes a detection system, the detection system comprising a reagent pack tank, reagent transport piping, a detection cell, and a spectrophotometer, the reagent pack tank being used to contain a mixture consisting of catalase, guaiacol / ethanol solution, and potassium bitarate-sodium hydroxide buffer, the reagent transport piping being provided with a reagent pack control valve and a first metering loop, the reagent transport piping communicating between the reagent pack tank and the detection cell and being used to transport the mixture to the detection cell. The aforementioned drug monitoring system also includes a third condensate transport pipe, the third condensate transport pipe is provided with a condensate sampling control valve and a second metering loop, the third condensate transport pipe is connected in parallel with the second condensate transport pipe and is in communication with the detection cell. The spectrophotometer is used to detect the absorbance value of the liquid in the detection cell.

[0013] Furthermore, the chemical monitoring system also includes a cleaning system, the cleaning system includes a third demineralized water transport pipe, the third demineralized water transport pipe is connected to the third condensed water transport pipe, and the third demineralized water transport pipe is provided with a third demineralized water control valve.

[0014] The system for suppressing condenser operating corrosion provided by the present invention has at least the following beneficial technical effects.

[0015] (1) In the system for suppressing operating corrosion of a condenser provided by the present invention, the reagent supply system is improved by, on the one hand, using a reagent supply device to achieve minute supply and improve the control accuracy of reagent quantity and drug concentration, and on the other hand, cleaning and rinsing with a drug are performed on the reagent supply device before each drug sampling to ensure the concentration of the drug transported to the mixing tank and prevent the contamination of the mixing tank with other impurities.

[0016] (2) By setting a first pressure sensor electrically connected to the drug control valve, monitoring and automatic replenishment of hydrogen peroxide stock solution in the drug tank are achieved, ensuring smooth collection by the reagent supply device and improving the collection efficiency of the reagent supply system.

[0017] (3) By setting a second pressure sensor electrically connected to the first desalinated water control valve, monitoring and automatic replenishment of desalinated water in the washing tank are realized, providing a prerequisite for cleaning the reagent supply device and improving the sampling efficiency of the reagent supply device.

[0018] (4) By realizing automatic chemical injection into the exhaust pipeline, the corrosion rate of the exhaust pipeline of the condenser can be significantly reduced, the service life of the condenser can be extended, and the cost can be reduced.

[0019] (5) By setting up a detection system, the monitoring of the hydrogen peroxide concentration in the condensate water can be realized. The spectrophotometer and the flow meter for chemical injection are electrically connected to realize the control of the chemical injection flow rate, prevent the waste of chemicals, and ensure the economy of chemical injection.

[0020] The second aspect of the present invention is a method for suppressing the operating corrosion of a condenser, which is applied to the system for suppressing the operating corrosion of the condenser described above. The method includes: A step S200 of preparing; A step S210 of injecting demineralized water. The injection of the demineralized water includes: Controlling to open the second demineralized water control valve and transporting the demineralized water to the preparation tank through the second demineralized water transport pipeline in step S211, and Controlling the level meter to detect the liquid level in the preparation tank, and when the liquid level in the preparation tank is greater than the first preset liquid level, executing step S220 in step S212. The step S210 includes the above steps. A step S220 of injecting a hydrogen peroxide stock solution. The injection of the hydrogen peroxide stock solution includes: Controlling the reagent supply device to move to the chemical tank and collecting the hydrogen peroxide stock solution in step S221, and Controlling the reagent supply device to move to the chemical injection port and transporting the hydrogen peroxide stock solution to the preparation tank in step S222. The step S220 includes the above steps. A step S230 of controlling the detection of the chemical concentration and the liquid level. The control of the detection of the chemical concentration and the liquid level includes: Controlling the chemical concentration detector to detect the chemical concentration in the preparation tank in step S231, Judging the relationship between the magnitude of the chemical concentration in the preparation tank and the target concentration value, and judging the relationship between the magnitude of the liquid level in the preparation tank and the second preset liquid level in S232, When the chemical concentration in the mixing tank reaches the target concentration value and the liquid level in the mixing tank reaches the second preset liquid level, close the second demineralized water control valve, stop the collection and transportation of the hydrogen peroxide stock solution by the reagent supply device in step S233, and When the chemical concentration in the mixing tank reaches the target concentration value and the liquid level in the mixing tank is lower than the first preset liquid level, step S234 including executing step S210 is included in the above step S230.

[0021] Furthermore, after step S233, Step S300 of injecting a chemical, wherein the chemical injection controls to open the first chemical injection control valve, the second back pressure valve, and the chemical injection flow meter, and transports a hydrogen peroxide chemical having a target concentration value and a preset flow rate through the chemical injection atomizing nozzle to the exhaust pipeline, and a step of executing step S400, are included in the above step S300, and Step S400 of performing detection and feedback control, wherein the detection and feedback control Step S410 of detecting the hydrogen peroxide concentration in the condensed water, Step S411 of controlling to open the third demineralized water control valve and washing the third condensed water transport pipe and the detection cell, Step S412 of controlling to open the condensed water sampling control valve, transporting a condensed water sample to the detection cell through the second metering loop, and then closing the condensed water sampling control valve, Step S413 of controlling to open the reagent pack chemical solution control valve, transporting the mixed solution to the detection cell through the first metering loop, and then closing the reagent pack chemical solution control valve, Step S414 of uniformly mixing the condensed water sample and the mixed solution for a first preset time to form a reaction solution, and controlling the spectrophotometer to detect the absorbance value of the reaction solution, and Step S400 includes step S415, which involves obtaining the hydrogen peroxide concentration in the condensed water based on the preset relationship between the absorbance value and the hydrogen peroxide concentration, and performing step S411. Step S420 is a feedback control of the iron concentration in condensate, Step S421: Control the iron detector to detect the iron concentration in the condensed water. Step S422: Determine the relationship between the magnitude of the iron concentration in the condensate and the magnitude of the preset iron concentration value. If the iron concentration in the condensate is greater than the preset iron concentration value, the preset flow rate of the drug injection flow meter is increased, and if the iron concentration in the condensate is less than or equal to the preset iron concentration value, step S424 is performed in step S423. Step S424 determines the relationship between the magnitude of the hydrogen peroxide concentration in the condensate and the magnitude of the preset hydrogen peroxide concentration value, The present invention further includes step S420, which includes step S425, if the hydrogen peroxide concentration in the condensate is greater than the preset hydrogen peroxide concentration value, reducing the preset flow rate of the drug injection flow meter.

[0022] Furthermore, the step S100 includes preparing the chemicals and rinsing them before step S220 in which the hydrogen peroxide concentrate is injected, and the preparation of the chemicals and rinsing are Step S110 involves controlling the drug control valve to open and transporting the hydrogen peroxide stock solution to the drug tank via the drug transport piping, Step S120 involves controlling the first desalination water control valve to open and transporting the desalination water to the washing tank via the first desalination water transport piping, Step S130 involves controlling the reagent supply device to move to the washing tank, collecting the desalinated water and performing a first rinse, then controlling the reagent supply device to move to the waste liquid tank and discharging the desalinated water after rinsing into the waste liquid tank, The method includes step S140, which involves controlling the reagent supply device to move to the chemical tank, collecting the hydrogen peroxide stock solution and rinsing it, then controlling the reagent supply device to move to the waste liquid tank and discharging the rinsed hydrogen peroxide stock solution into the waste liquid tank.

[0023] The method for suppressing operating corrosion of a condenser provided by the present invention has at least the following beneficial technical effects.

[0024] (1) By setting up an automatic mixing system, the hydrogen peroxide solution in the mixing tank can be kept at the target concentration value at all times, and mixing can be performed smoothly.

[0025] (2) By monitoring the iron content in the condensate, the corrosion status of the condenser piping can be monitored, and the chemical injection flow rate can be adjusted based on the iron content, thereby reducing the corrosion rate of the condenser piping, extending the service life of the condenser, and reducing maintenance costs.

[0026] (3) By detecting the hydrogen peroxide concentration in the condensate, the drug injection flow rate is adjusted based on the hydrogen peroxide concentration and iron content, thereby preventing drug waste and ensuring the economic efficiency of drug injection. [Brief explanation of the drawing]

[0027] [Figure 1] This is a schematic diagram of a system for suppressing condenser operating corrosion, provided by an embodiment of the present invention. [Figure 2] This is a flowchart of a method for suppressing operating corrosion of a condenser, as provided by an embodiment of the present invention. [Modes for carrying out the invention]

[0028] To make the above-mentioned objectives, features, and advantages of the present invention clearer and easier to understand, specific embodiments of the present invention will be described in detail below in conjunction with Figures 1 and 2.

[0029] Referring to Figure 1, a first embodiment of the present invention is a system for suppressing operating corrosion of a condenser, comprising a compounding system, the compounding system comprising a chemical stock tank 1, a demineralized water tank 4, a compounding tank 15, and a reagent supply system, the chemical stock tank 1 is used to contain a hydrogen peroxide stock, the demineralized water tank 4 is used to contain demineralized water, a chemical inlet 13 is provided on the upper surface of the compounding tank 15, a chemical concentration detector 16 is provided on the compounding tank 15, a chemical tank 10, a washing tank 11, and a waste liquid tank 12 are provided on the upper surface of the compounding tank 15, and the chemical tank 10 and the chemical stock A chemical transport pipe is connected to tank 1, a first demineralized water transport pipe is connected to the washing tank 11 and the demineralized water tank 4, a second demineralized water transport pipe is connected to the mixing tank 15 and the demineralized water tank 4, and a second demineralized water control valve 22 is provided in the second demineralized water transport pipe. The reagent supply system is equipped with a reagent supply device 8, which is vertically movable in a first direction and can move between the chemical tank 10, the washing tank 11, the waste liquid tank 12 and the chemical inlet 13. The chemical concentration detector 16 is electrically connected to the reagent supply system and the second demineralized water control valve 22, respectively.

[0030] As described, the reagent supply device 8 is movable between the chemical tank 10, the washing tank 11, and the waste liquid tank 12. It can move up and down in a first direction to enter the chemical tank 10 to collect hydrogen peroxide concentrate, and then exit the chemical tank 10 to move to the chemical inlet 13, where it can transport the collected hydrogen peroxide concentrate to the mixing tank 15. It can also move up and down in a first direction to enter the washing tank 11 to collect demineralized water for washing and then discharge the collected demineralized water to the waste liquid tank 12. Furthermore, it can move up and down in a first direction to enter the chemical tank 10 to collect hydrogen peroxide concentrate for rinsing and then discharge the collected hydrogen peroxide concentrate to the waste liquid tank 12.

[0031] As explained, each time the reagent supply device 8 takes a sample of the drug from the drug tank 10, some of the drug remains on the wall of the tube, and since the reagent supply device 8 is in contact with the atmosphere, the remaining drug is decomposed. Therefore, to ensure that the concentration of the drug taken each time does not deviate from the concentration of the drug stock solution, the reagent supply device 8 is first placed in the washing tank 11 to take desalinated water and wash it before taking a sample of the drug. Then, the reagent supply device 8 is placed in the drug tank 10 to take a sample of the drug stock solution and rinse it. This ensures that the concentration of the drug stock solution taken each time and transported to the mixing tank 15 is maintained, preventing contamination of the mixing tank 15 by avoiding the introduction of other impurities.

[0032] As described, the reagent supply device 8 is a supply needle that enables the supply of minute amounts of reagents. Compared to a metering pump, the amount of reagent is precisely controlled, avoiding fluctuations in the drug concentration in the mixing tank 15 due to improper frequency control of the metering pump, and improving the stability and accuracy when mixing drug concentrations.

[0033] Therefore, in the system for suppressing condenser operation corrosion provided by the embodiment of the present invention, the reagent supply system is improved to, on the one hand, enable minute supply using the reagent supply device 8 and improve the control accuracy of reagent quantity and drug concentration, and on the other hand, perform cleaning and drug rinsing of the reagent supply device 8 before each drug sampling to ensure the concentration of the drug transported to the mixing tank 15 and prevent contamination of the mixing tank 15 with other impurities.

[0034] In the embodiment of the present invention, the drug injection port 13 is provided with a gasket to prevent dust from entering, and the reagent supply device 8 can puncture this gasket and inject the drug into the mixing tank 15.

[0035] Referring to Figure 1, in the embodiment of the present invention, the drug tank 10, the washing tank 11, and the waste liquid tank 12 are arranged sequentially in a second direction, and the reagent supply system includes a reagent supply arm 7, which is provided on the mixing tank 15, and the reagent supply arm 7 is located above the drug tank 10, the washing tank 11, and the waste liquid tank 12 and extends in a second direction, where the second direction is parallel to the upper surface of the mixing tank 15 and perpendicular to the first direction.

[0036] In one embodiment of the present invention, the reagent supply device 8 is slidably connected to the reagent supply arm 7 along a first direction and a second direction, respectively.

[0037] In the embodiment of the present invention, specifically, a vertical column is fixedly provided on the mixing tank 15, one end of the reagent supply arm 7 is fixedly provided on the vertical column, the reagent supply arm 7 is equipped with a guide rail, a slider is slidably connected to the guide rail along a second direction, the slider has a guide hole along a first direction, and the reagent supply device 8 is slidably connected to the guide hole.

[0038] In the embodiment of the present invention, specifically, a vertical column is fixedly provided on the mixing tank 15, one end of the reagent supply arm 7 is fixedly provided on the vertical column, the reagent supply arm 7 is equipped with a first guide rail, a first slider is slidably connected to the first guide rail along a second direction, a second guide rail is fixedly provided on the first slider, a second slider is slidably connected to the second guide rail along a first direction, and the reagent supply device 8 is fixedly provided on the second slider.

[0039] In another embodiment of the present invention, the reagent supply device 8 is fixedly connected to the reagent supply arm 7, the reagent supply arm 7 is slidably connected to the mixing tank 15 along a first direction, and the reagent supply arm 7 is extendable and retractable along a second direction.

[0040] In the embodiment of the present invention, specifically, the mixing tank 15 is fixedly provided with a first linear drive component that is movable along a first direction, the reagent supply arm 7 is a second linear drive component that is movable along a second direction, the fixed end of the second drive component is fixedly provided to the power output end of the first linear drive component, the reagent supply device 8 is fixedly provided to the power output end of the second drive component, and the first linear drive component and the second linear drive component are electric actuators or electric cylinders.

[0041] Referring to Figure 1, in this embodiment of the present invention, a drug control valve 2 is provided in the drug transport piping, a first pressure sensor is provided between the drug tank 10 and the mixing tank 15, the first pressure sensor is electrically connected to the drug control valve 2, and the first pressure sensor is configured to open the drug control valve 2 when the pressure value of the drug tank 10 detected by the first pressure sensor is less than a first preset pressure value, and to close the drug control valve 2 when the pressure value of the drug tank 10 detected by the first pressure sensor is greater than a second preset pressure value, where the first preset pressure value is less than the second preset pressure value.

[0042] As described, the first preset pressure value is the maximum load capacity of the chemical tank 10, and the second preset pressure value is 5% to 15% of the maximum load capacity of the chemical tank 10. Preferably, the second preset pressure value is 10% of the maximum load capacity of the chemical tank 10.

[0043] In the system for suppressing condenser operation corrosion provided by the embodiment of the present invention, by setting a first pressure sensor electrically connected to the chemical control valve 2, monitoring and automatic replenishment of hydrogen peroxide stock solution in the chemical tank 10 is achieved, ensuring smooth sampling by the reagent supply device 8 and improving the sampling efficiency of the reagent supply system.

[0044] Referring to Figure 1, in this embodiment of the present invention, a drug pump 3 is further provided in the drug transport piping, the drug pump 3 is provided in the piping connected to the outlet end of the drug control valve 2, and the drug pump 3 is electrically connected to the drug control valve 2.

[0045] Referring to Figure 1, in an embodiment of the present invention, a first demineralized water control valve 5 is provided in the first demineralized water transport piping, a second pressure sensor is provided between the washing tank 11 and the mixing tank 15, the second pressure sensor is electrically connected to the first demineralized water control valve 5, and the second pressure sensor is configured to open the first demineralized water control valve 5 when the pressure value of the washing tank 11 detected by the second pressure sensor is less than a third preset pressure value, and to close the first demineralized water control valve 5 when the pressure value of the washing tank 11 detected by the second pressure sensor is greater than a fourth preset pressure value, where the third preset pressure value is less than the fourth preset pressure value.

[0046] As described, the third preset pressure value is the maximum load-bearing capacity of the cleaning tank 11, and the fourth preset pressure value is 5% to 15% of the maximum load-bearing capacity of the cleaning tank 11. Preferably, the fourth preset pressure value is 10% of the maximum load-bearing capacity of the cleaning tank 11.

[0047] In the system for suppressing operating corrosion of a condenser provided by an embodiment of the present invention, by setting a second pressure sensor electrically connected to the first demineralized water control valve 5, monitoring and automatic replenishment of demineralized water in the washing tank 11 is achieved, providing a prerequisite for washing the reagent supply device 8 and improving the sampling efficiency of the reagent supply device 8.

[0048] In embodiments of the present invention, a first demineralized water transport piping is provided with a first demineralized water pump 6, the first demineralized water pump 6 is provided in piping connected to the outlet end of the first demineralized water control valve 5, and the first demineralized water pump 6 is electrically connected to the first demineralized water control valve 5.

[0049] Referring to Figure 1, in an embodiment of the present invention, the transport piping for the second demineralized water is provided with a demineralized water atomizer 19, a second demineralized water pump 23, and a first back pressure valve 24. The demineralized water atomizer 19 is located inside the mixing tank 15, and the first back pressure valve 24 is provided in the piping connected to the outlet end of the second demineralized water pump 23. Both the second demineralized water pump 23 and the first back pressure valve 24 are electrically connected to the second demineralized water control valve 22. With this setup, the discharge pressure of the demineralized water atomizer 19 is increased, making it easier to atomize into small droplets, and the small droplets discharged from the demineralized water atomizer 19 come into sufficient contact with and mix with the hydrogen peroxide stock solution.

[0050] Referring to Figure 1, in this embodiment of the present invention, a level gauge 14 for detecting the liquid level in the mixing tank 15 is provided on the top surface of the mixing tank 15. The level gauge 14 is electrically connected to the drug concentration detector 16, the reagent supply system, and the second demineralized water control valve 22, respectively. The level gauge 14 and the drug concentration detector 16 operate as follows: when the liquid level in the mixing tank 15 detected by the level gauge 14 is greater than the first preset liquid level, the reagent supply device 8 is opened to collect the hydrogen peroxide stock solution and transport the hydrogen peroxide stock solution to the mixing tank 15. When the drug concentration detected by the drug concentration detector 16 reaches the target concentration value, the level gauge 14 and the drug concentration detector 16 are opened. The system is configured such that when the liquid level in the mixing tank 15, as detected by the meter 14, reaches the second preset liquid level, the second demineralized water control valve 22 is closed, and the collection and transport of hydrogen peroxide stock by the reagent supply device 8 is stopped. When the drug concentration in the mixing tank 15 reaches the target concentration value and the liquid level in the mixing tank 15 is lower than the first preset liquid level, the reagent supply device 8 is opened to collect the hydrogen peroxide stock and transport it to the mixing tank 15, the second demineralized water control valve 22 is opened, and the drug concentration in the mixing tank 15 is maintained at the target concentration value. Here, the first preset liquid level is lower than the second preset liquid level. With this setting, automatic mixing of drugs in the mixing tank 15 is achieved.

[0051] In the embodiments of the present invention, the mixing tank 15 has a maximum liquid level, the second preset liquid level is the maximum liquid level, and the first preset liquid level is 0.2 to 0.4 times the maximum liquid level, preferably the first preset liquid level is 1 / 3 of the maximum liquid level.

[0052] In the embodiments of the present invention, the range of possible target concentration values ​​is 0.08% to 0.12%, and preferably, the target concentration value is 0.1%.

[0053] Furthermore, the type of level meter 14 is not particularly limited and may be a general level meter such as a float-type level meter, an ultrasonic level meter, or a radar-type level meter. In the embodiments of the present invention, the level meter 14 is preferably a radar-type level meter.

[0054] Referring to Figure 1, in this embodiment of the present invention, a return liquid pipe is provided between the drug discharge end of the drug concentration detector 16 and the mixing tank 15. A return liquid pump 17 is provided in the return liquid pipe, and the return liquid pump 17 is electrically connected to the drug concentration detector 16. This configuration prevents the waste of drug.

[0055] Referring to Figure 1, in one embodiment of the present invention, the mixing tank 15 is provided with a chemical solution discharge pipe and a thermometer 18. The chemical solution discharge pipe is located at the bottom of the mixing tank 15, and a drain control valve is provided in the chemical solution discharge pipe. The thermometer 18 is used to detect the chemical temperature in the mixing tank 15, and the thermometer 18 is electrically connected to the drain control valve. The thermometer 18 and the drain control valve are configured to open the drain control valve to drain the chemical if the chemical temperature in the mixing tank 15 detected by the thermometer 18 is greater than a first temperature preset value, and to open the second demineralized water control valve 22 to perform cooling by adding water. If the temperature in the mixing tank 15 is too high, the diluted hydrogen peroxide will decompose easily. Therefore, in order to maintain the hydrogen peroxide in the mixing tank 15 at a target concentration value, it is necessary to limit the chemical temperature in the mixing tank 15 to a certain range.

[0056] In this embodiment of the present invention, the waste liquid tank 12 is provided with an overflow hole, and a waste liquid transport pipe is connected to the overflow hole. This configuration enables cleaning of the reagent supply device 8 and automatic discharge of the rinse liquid.

[0057] Referring to Figure 1, in this embodiment of the present invention, a check valve 20 is provided in the waste liquid transport piping, and the chemical solution discharge piping is connected to the waste liquid transport piping.

[0058] In another embodiment of the present invention, the mixing tank 15 is provided with a heat sink, and a cooling coil and a thermometer 18 are provided inside the mixing tank 15, the cooling coil is connected to a coolant control valve, the thermometer 18 is used to detect the temperature of the drug inside the mixing tank 15, the thermometer 18 and the coolant control valve are electrically connected, and the thermometer 18 and the coolant control valve are configured to open the coolant control valve to cool if the temperature of the drug inside the mixing tank 15 detected by the thermometer 18 is greater than a first temperature preset value.

[0059] The possible range for the first temperature preset value is 30°C to 50°C.

[0060] Referring to Figure 1, in an embodiment of the present invention, the system for suppressing operating corrosion of the condenser also includes a chemical injection system, which includes a chemical injection pipe, one end of which is connected to a mixing tank 15 and the other end to an exhaust pipe 33, and the chemical injection pipe is sequentially equipped with a first chemical injection control valve 25, a second back pressure valve 27, a chemical injection flow meter 29, and a chemical injection atomizing nozzle 32 along the direction of chemical transport, with the chemical injection atomizing nozzle 32 located inside the exhaust pipe 33. With this configuration, automatic chemical injection into the exhaust pipe 33 is achieved, significantly reducing the corrosive toxicity of the condenser's exhaust pipe 33, extending the service life of the condenser, and reducing costs.

[0061] As described, the chemical injection flow meter 29 is an electromagnetic flow meter and is used to control the amount of hydrogen peroxide added to the exhaust pipe 33.

[0062] Referring to Figure 1, in an embodiment of the present invention, a drug injection pump 26 is provided in the drug injection piping between the first drug injection control valve 25 and the second back pressure valve 27, and / or a second drug injection control valve 28 is provided in the drug injection piping between the second back pressure valve 27 and the drug injection flow meter 29, and / or a third back pressure valve 30 and a third drug injection control valve 31 are sequentially provided in the drug injection piping between the drug injection flow meter 29 and the drug injection atomizing nozzle 32.

[0063] As described, the chemical injection pump 26 is a constant flow pump for transporting hydrogen peroxide having a target concentration, and the second back pressure valve 27 and / or third back pressure valve 30 increase the pressure in front of the chemical injection atomizing nozzle 32, thereby atomizing the chemical in the chemical injection atomizing nozzle 32 into tiny droplets that drip into the exhaust pipe 33.

[0064] Referring to Figure 1, in an embodiment of the present invention, the system for suppressing operating corrosion of the condenser also includes a chemical monitoring system, the chemical monitoring system includes a condensate sampling system, the condensate sampling system includes a condensate collection tank 34, a first condensate transport pipe and a second condensate transport pipe, the first condensate transport pipe is connected between the exhaust pipe 33 and the water supply end of the condensate collection tank 34, the second condensate transport pipe is connected to the water outlet end of the condensate collection tank 34, the second condensate transport pipe is provided with an iron detector 50 for detecting the iron concentration in the condensate, the iron detector 50 is electrically connected to a chemical injection flow meter 29, and the iron detector 50 and the chemical injection flow meter 29 are configured to increase the flow rate of the chemical injection flow meter 29 when the iron concentration in the condensate detected by the iron detector 50 is greater than a preset iron concentration value.

[0065] As described, the drug injection flow meter 29 has a preset flow rate, and if the iron concentration in the condensate detected by the iron detector 50 is greater than the preset iron concentration value, the preset flow rate of the drug injection flow meter 29 is increased.

[0066] In the embodiments of the present invention, the preset flow rate of the drug injection flow meter 29 is 10 to 100 mL / s.

[0067] In the system for suppressing condenser operating corrosion provided by the embodiment of the present invention, the iron content in the condensate can be monitored online by setting an iron detector 50. Furthermore, by electrically connecting the iron detector 50 and the chemical injection flow meter 29, the chemical injection flow rate can be dynamically adjusted based on the iron concentration in the condensate, thereby reducing the corrosion rate of the condenser exhaust pipe 33, extending the service life of the condenser, and improving the operating stability of the condenser.

[0068] In the embodiments of the present invention, the possible range of the preset iron concentration value is 0 μg / L to 3 μg / L, and preferably the preset iron concentration value is 2 μg / L.

[0069] Referring to Figure 1, in an embodiment of the present invention, the system for suppressing operating corrosion of the condenser also includes a detection system, the detection system comprising a reagent pack chemical tank 36, reagent transport piping, a detection cell 48, and a spectrophotometer 49, the reagent pack chemical tank 36 is used to contain a mixture consisting of catalase, guaiacol / ethanol solution, and potassium bitarate-sodium hydroxide buffer, the reagent transport piping is provided with a reagent pack chemical control valve 38 and a first metering loop 46, the reagent transport piping is in communication with the reagent pack chemical tank 36 and the detection cell 48 and is used to transport the mixture to the detection cell 48, and a chemical monitoring system The stem also includes a third condensate transport pipe, which is equipped with a condensate sampling control valve 39 and a second metering loop 47. The third condensate transport pipe is connected in parallel with the second condensate transport pipe and communicates with a detection cell 48. The spectrophotometer 49 is used to detect the absorbance value of the liquid in the detection cell 48. The spectrophotometer 49 is electrically connected to a chemical injection flow meter 29 and an iron detector 50. The spectrophotometer 49 is configured to reduce the flow rate of the chemical injection flow meter 29 when the iron concentration in the condensate is less than a preset iron concentration value and the hydrogen peroxide concentration in the condensate is greater than a preset hydrogen peroxide concentration value.

[0070] As described, the drug injection flow meter 29 has a preset flow rate, and when the iron concentration in the condensate is less than the preset iron concentration value and the hydrogen peroxide concentration in the condensate is greater than the preset hydrogen peroxide concentration value, the preset flow rate of the drug injection flow meter 29 is reduced.

[0071] As explained, the detection cell 48 is connected to the wastewater pipe.

[0072] As described, the concentration of catalase is 25 mmol / L to 50 mmol / L, the concentration of the guaiacol / ethanol solution is 0.1% to 0.2%, and the concentration of the potassium bitrate-sodium hydroxide buffer is 0.05 mol / L to 0.2 mol / L. Preferably, the concentration of catalase is 50 mmol / L, the concentration of the guaiacol / ethanol solution is 0.2%, and the concentration of the potassium bitrate-sodium hydroxide buffer is 0.1 mol / L.

[0073] As explained, the absorbance value of the liquid in the detection cell 48 can reflect the magnitude of the hydrogen peroxide concentration; the higher the absorbance value, the higher the hydrogen peroxide concentration. The absorbance value can range from 0 to 1.0, and the corresponding hydrogen peroxide concentration can range from 0 to 500 μg / L.

[0074] In the embodiments of the present invention, the spectrophotometer 49 is an ultraviolet spectrophotometer.

[0075] In the system for suppressing condenser operation corrosion provided by the embodiment of the present invention, the hydrogen peroxide concentration of the condensate can be monitored by setting up a detection system, and the chemical injection flow meter 29 is electrically connected to enable control of the chemical injection flow rate, thereby preventing chemical waste and ensuring the economic efficiency of chemical injection.

[0076] Referring to Figure 1, in an embodiment of the present invention, a second pump body 45 is provided in the reagent transport piping, and the second pump body 45 is located between the reagent pack chemical control valve 38 and the first metering loop 46.

[0077] Referring to Figure 1, in this embodiment of the present invention, a first pump body 44 is provided in the third condensate transport piping, and the first pump body 44 is located between the condensate sampling control valve 39 and the second metering loop 47.

[0078] In an embodiment of the present invention, the drug monitoring system also includes a washing system, the washing system includes a third demineralized water transport pipe, the third demineralized water transport pipe is connected to a third condensed water transport pipe, and the third demineralized water transport pipe is provided with a third demineralized water control valve 37.

[0079] As described, after detecting the hydrogen peroxide concentration in the condensate, a cleaning system cleans some of the third condensate transport piping and the cleaning tank 11, thereby improving the accuracy of the next hydrogen peroxide sampling and detection in the condensate.

[0080] Referring to Figure 1, in an embodiment of the present invention, the drug monitoring system is equipped with a five-way valve 43, the five-way valve 43 having a first valve inlet a, a second valve inlet b, a third valve inlet c, a first valve outlet d, and a second valve outlet e, the third desalination water transport piping is connected to the first valve inlet a, the first valve inlet a is connectable to the first valve outlet d, the third condensate water transport piping is connectable to the third valve inlet c and the first valve outlet d, and the reagent transport piping is connected to the second valve inlet b and the second valve outlet e, the second valve inlet b is connected to the second valve outlet e.

[0081] Referring to Figure 1, in this embodiment of the present invention, the first pump body 44 and the first metering loop 46 are located between the five-way valve 43 and the detection cell 48, and the second pump body 45 and the second metering loop 47 are located between the five-way valve 43 and the detection cell 48.

[0082] Referring to Figure 1, in this embodiment of the present invention, the drug monitoring system includes a drug injection monitoring and control tank 40, a five-way valve 43, a detection cell 48, and a spectrophotometer 49 are all located in the drug injection monitoring and control tank 40, some of the third desalination water transport piping, some of the reagent transport piping, and some of the third condensate transport piping are located in the drug injection monitoring and control tank 40, and a controller 41 is located inside the drug injection monitoring and control tank 40, and the controller 41 detects the drug concentration The system is electrically connected to the following: instrument 16, second demineralized water control valve 22, reagent supply system, drug control valve 2, drug pump 3, first demineralized water control valve 5, first demineralized water pump 6, second demineralized water pump 23, first back pressure valve 24, level gauge 14, return liquid pump 17, thermometer 18, drainage control valve, first drug injection control valve 25, second back pressure valve 27, second drug injection control valve 28, third back pressure valve 30, third drug injection control valve 31, iron detector 50, spectrophotometer 49, and third demineralized water control valve 37.

[0083] Referring to Figure 1, in an embodiment of the present invention, the drug injection monitoring and control tank 40 is further provided with a display 42, which is electrically connected to a controller 41, and the display 42 is used to display pressure values ​​detected by a first pressure sensor and a second pressure sensor, and / or drug concentration values ​​detected by a drug concentration detector 16, and / or the liquid level in the mixing tank 15 detected by a level gauge 14, and / or the drug temperature in the mixing tank 15 detected by a thermometer 18, and / or the iron concentration in the condensate detected by an iron detector 50, and / or the absorbance value of the liquid in the detection cell 48 detected by a spectrophotometer 49, and / or the hydrogen peroxide concentration in the detection cell 48, and / or the flow rate detected by a drug injection flow meter 29.

[0084] Referring to Figure 2, a second aspect of the present invention is a method for suppressing operating corrosion of a condenser, which is applied to the system for suppressing operating corrosion of a condenser described above, and this method is Step S200 to be mixed, Step S210 involves injecting demineralized water, and the injection of demineralized water is Step S211 involves controlling the second desalination water control valve 22 to open and transporting the desalination water to the mixing tank 15 via the second desalination water transport piping, and Step S210 includes controlling the level gauge 14 to detect the liquid level in the mixing tank 15, and if the liquid level in the mixing tank 15 is greater than a first preset liquid level, step S212, which includes performing step S220, Step S220 involves injecting a hydrogen peroxide concentrate, and the injection of the hydrogen peroxide concentrate is Step S221 involves controlling the reagent supply device 8 to move to the drug reservoir 10 and collecting the hydrogen peroxide stock solution, and Step S220 includes step S222, which involves controlling the reagent supply device 8 to move to the drug inlet 13 and transporting the hydrogen peroxide stock solution to the mixing tank 15, Step S230 controls the drug concentration and liquid level detection, wherein the control of the drug concentration and liquid level detection is Step S231 controls the drug concentration detector 16 to detect the drug concentration in the mixing tank 15. Step S232 involves determining the relationship between the magnitude of the drug concentration in the mixing tank 15 and the magnitude of the target concentration value, and determining the relationship between the size of the liquid level in the mixing tank 15 and the size of the second preset liquid level. Step S233: When the drug concentration in the mixing tank 15 reaches the target concentration value and the liquid level in the mixing tank 15 reaches the second preset liquid level, the second demineralized water control valve 22 is closed, and the collection and transport of hydrogen peroxide stock solution by the reagent supply device 8 is stopped. Step S230 includes step S234, which performs step S210 if the drug concentration in the mixing tank 15 reaches a target concentration value and the liquid level in the mixing tank 15 is lower than a first preset liquid level.

[0085] In the method for suppressing operating corrosion of a condenser provided by the embodiment of the present invention, by setting up an automatic mixing system, the hydrogen peroxide solution in the mixing tank 15 can be kept at a target concentration value at all times and mixed smoothly.

[0086] In an embodiment of the present invention, after step S233, Step S300 for injecting a drug, the drug injection comprising the steps of controlling the opening of a first drug injection control valve 25, a second back pressure valve 27, and a drug injection flow meter 29, the drug injection flow meter 29 having a preset flow rate, transporting a hydrogen peroxide drug having a target concentration value and a preset flow rate to the exhaust pipe 33 via a drug injection atomizing nozzle 32, and performing step S400, Step S400 involves detection and feedback control, wherein detection and feedback control are performed Step S410: Detect the hydrogen peroxide concentration in the condensate. Step S411 involves controlling the third desalination water control valve 37 to open, and cleaning the third condensate transport pipe and detection cell 48. Step S412 involves controlling the condensate sampling control valve 39 to open, transporting the condensate sample to the detection cell 48 via the second quantitative loop 47, and then closing the condensate sampling control valve 39. Step S413 involves controlling the reagent pack chemical control valve 38 to open, transporting the mixture to the detection cell 48 via the first quantitative loop 46, and then closing the reagent pack chemical control valve 38. Step S414 involves uniformly mixing the condensed water sample and the mixture over a first preset time to form a reaction solution, and controlling the spectrophotometer 49 to detect the absorbance value of the reaction solution, and Step S400 includes step S415, which involves obtaining the hydrogen peroxide concentration in the condensate based on a preset relationship between absorbance values ​​and hydrogen peroxide concentration, and performing step S411, Step S420 is a feedback control of the iron concentration in the condensate, Step S421 controls the iron detector 50 to detect the iron concentration in the condensate. Step S422 determines the relationship between the magnitude of the iron concentration in the condensate and the magnitude of the preset iron concentration value. If the iron concentration in the condensate is greater than the preset iron concentration value, the preset flow rate of the drug injection flow meter 29 is increased, and if the iron concentration in the condensate is less than or equal to the preset iron concentration value, step S424 is performed in step S423. Step S424 determines the relationship between the magnitude of the hydrogen peroxide concentration in the condensate and the magnitude of the preset hydrogen peroxide concentration value, and The present invention further includes step S420, which includes step S425, where, if the hydrogen peroxide concentration in the condensate is greater than a preset hydrogen peroxide concentration value, the preset flow rate of the drug injection flow meter 29 is reduced.

[0087] According to embodiments of the present invention, by monitoring the iron content in the condensate water, the corrosion status of the condenser piping can be monitored, and the chemical injection flow rate can be adjusted based on the iron content to reduce the corrosion rate of the condenser piping, extend the service life of the condenser, and reduce maintenance costs. Furthermore, by detecting the hydrogen peroxide concentration in the condensate water, the chemical injection flow rate can be adjusted based on the hydrogen peroxide concentration and iron content to prevent chemical waste and ensure the economic efficiency of chemical injection.

[0088] In embodiments of the present invention, step S100 is further included before step S200, in which preparation and rinsing of the drug is performed. Step S110 involves controlling the drug control valve 2 to open and transporting the hydrogen peroxide concentrate to the drug tank 10 via the drug transport piping, Step S120 involves controlling the first desalinated water control valve 5 to open and transporting the desalinated water to the washing tank 11 via the first desalinated water transport piping, Step S130 involves controlling the reagent supply device 8 to move to the washing tank 11, collecting demineralized water and performing a first rinse, then controlling the reagent supply device 8 to move to the waste liquid tank 12, and discharging the demineralized water after rinsing into the waste liquid tank 12. The method includes step S140, which involves controlling the reagent supply device 8 to move to the chemical tank 10, collecting the hydrogen peroxide stock solution and rinsing it, then controlling the reagent supply device 8 to move to the waste liquid tank 12, and discharging the rinsed hydrogen peroxide stock solution into the waste liquid tank 12.

[0089] In the method for suppressing condenser operation corrosion provided by the embodiment of the present invention, the reagent supply device 8 is washed and rinsed with the chemical before each chemical sampling to ensure the concentration of the chemical transported to the mixing tank 15 and prevent the introduction of other impurities into the mixing tank 15.

[0090] In an embodiment of the present invention, step S110, which controls the drug control valve 2 to open and transports the hydrogen peroxide stock solution to the drug tank 10 via the drug transport piping, Step S111 involves controlling the first pressure sensor to detect the pressure value of the drug tank 10, Step S112 includes determining the relationship between the pressure value of the drug tank 10 and the first preset pressure value, and if the pressure value of the drug tank 10 is less than the first preset pressure value, leaving the drug control valve 2 open, and if the pressure value of the drug tank 10 is greater than the second preset pressure value, closing the drug control valve 2. Step S120 involves controlling the first desalinated water control valve 5 to open and transporting the desalinated water to the washing tank 11 via the first desalinated water transport piping. Step S121 involves controlling the second pressure sensor to detect the pressure value of the washing tank 11, The process includes step S122, which involves determining the relationship between the pressure value of the washing tank 11 and the third preset pressure value, and if the pressure value of the washing tank 11 is less than the third preset pressure value, leaving the first desalination water control valve 5 open, and if the pressure value of the washing tank 11 is greater than the fourth preset pressure value, closing the first desalination water control valve 5.

[0091] In the method for suppressing operating corrosion of a condenser provided by an embodiment of the present invention, by setting a first pressure sensor electrically connected to the chemical control valve 2, monitoring and automatic replenishment of the hydrogen peroxide stock solution in the chemical tank 10 is achieved, ensuring smooth sampling by the reagent supply device 8 and improving the sampling efficiency of the reagent supply system. Furthermore, by setting a second pressure sensor electrically connected to the first demineralized water control valve 5, monitoring and automatic replenishment of the demineralized water in the washing tank 11 is achieved, providing the prerequisites for washing the reagent supply device 8 and improving the sampling efficiency of the reagent supply device 8.

[0092] While the present invention is disclosed as described above, it is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, and therefore the scope of protection of the present invention shall be limited to the scope defined by the claims. [Explanation of symbols]

[0093] 1: Drug concentrate tank, 2: Drug control valve, 3: Drug pump, 4: Demineralized water tank, 5: Control valve for first demineralized water, 6: Pump for first demineralized water, 7: Reagent supply arm, 8: Reagent supply device, 10: Drug tank, 11: Washing tank, 12: Waste liquid tank, 13: Drug inlet, 14: Level meter, 15: Mixing tank, 16: Drug concentration detector, 17: Return liquid pump, 18: Thermometer, 19: Demineralized water atomizer, 20: Check valve, 21: Drain valve, 22: Control valve for second demineralized water, 23: Pump for second demineralized water, 24: First back pressure valve, 25: Control valve for first drug injection, 26: Drug injection pump, 27: Second back pressure valve, 28: Second drug 1: Control valve for drug injection, 29: Flow meter for drug injection, 30: Third back pressure valve, 31: Control valve for third drug injection, 32: Atomizing nozzle for drug injection, 33: Exhaust pipe, 34: Condensate collection tank, 35: Condensate pump, 36: Reagent pack chemical tank, 37: Control valve for third desalinated water, 38: Reagent pack chemical control valve, 39: Condensate sampling control valve, 40: Drug injection monitoring control tank, 41: Controller, 42: Display, 43: Five-way valve, 44: First pump body, 45: Second pump body, 46: First metering loop, 47: Second metering loop, 48: Detection cell, 49: Spectrophotometer, 50: Iron detector.

Claims

1. A system for suppressing operating corrosion of a condenser, comprising a compounding system, the compounding system is A chemical stock tank (1) for storing hydrogen peroxide stock, A desalination water tank (4) for storing desalination water, A mixing tank (15) is provided with a chemical inlet (13) on its upper surface, a chemical concentration detector (16) is provided on the mixing tank (15), a chemical tank (10), a washing tank (11), and a waste liquid tank (12) are provided on the upper surface of the mixing tank (15), a chemical transport pipe is connected between the chemical tank (10) and the chemical concentrate tank (1), a first demineralized water transport pipe is connected between the washing tank (11) and the demineralized water tank (4), a second demineralized water transport pipe is connected between the mixing tank (15) and the demineralized water tank (4), and a second demineralized water control valve (22) is provided on the second demineralized water transport pipe, the mixing tank (15) and, A reagent supply system comprising a reagent supply device (8), the reagent supply device (8) being able to move up and down in a first direction and being able to move between the chemical tank (10), the washing tank (11), the waste liquid tank (12), and the chemical inlet (13), A system for suppressing operating corrosion of a condenser, characterized in that the drug concentration detector (16) is electrically connected to the reagent supply system and the second desalination water control valve (22), respectively.

2. The chemical tank (10), the washing tank (11), and the waste liquid tank (12) are arranged sequentially in a second direction, and the reagent supply system includes a reagent supply arm (7), the reagent supply arm (7) is provided on the mixing tank (15), the reagent supply arm (7) is located above the chemical tank (10), the washing tank (11), and the waste liquid tank (12), and extends in the second direction. The reagent supply device (8) is slidably connected to the reagent supply arm (7) along the first and second directions, respectively, or the reagent supply device (8) is fixedly connected to the reagent supply arm (7), the reagent supply arm (7) is slidably connected to the mixing tank (15) along the first direction, and the reagent supply arm (7) is extendable and retractable along the second direction. The system for suppressing operating corrosion of a condenser according to claim 1, characterized in that the second direction is parallel to the upper surface of the mixing tank (15) and perpendicular to the first direction.

3. A drug control valve (2) is provided in the drug transport piping, and a first pressure sensor is provided between the drug tank (10) and the mixing tank (15). The first pressure sensor is electrically connected to the drug control valve (2), and the first pressure sensor is configured to open the drug control valve (2) when the pressure value of the drug tank (10) detected by the first pressure sensor is less than a first preset pressure value, and to close the drug control valve (2) when the pressure value of the drug tank (10) detected by the first pressure sensor is greater than a second preset pressure value, where the first preset pressure value is less than the second preset pressure value, and / or, the first demineralized water transport piping is provided with a first demineralized water control valve (5), a second pressure sensor is provided between the washing tank (11) and the mixing tank (15), the second pressure sensor is electrically connected to the first demineralized water control valve (5), the second pressure sensor is configured to open the first demineralized water control valve (5) when the pressure value of the washing tank (11) detected by the second pressure sensor is less than a third preset pressure value, and to close the first demineralized water control valve (5) when the pressure value of the washing tank (11) detected by the second pressure sensor is greater than a fourth preset pressure value, where the third preset pressure value is less than the fourth preset pressure value, and / or, the second demineralized water transport piping is provided with a demineralized water atomizer (19), a second demineralized water pump (23), and a first back pressure valve (24), wherein the demineralized water atomizer (19) is located within the mixing tank (15), the first back pressure valve (24) is provided in piping connected to the outlet end of the second demineralized water pump (23), and both the second demineralized water pump (23) and the first back pressure valve (24) are electrically connected to the second demineralized water control valve (22). and / or, a level gauge (14) is provided on the upper surface of the mixing tank (15), the level gauge (14) is used to detect the liquid level in the mixing tank (15), and the level gauge (14) is electrically connected to the drug concentration detector (16), the reagent supply system, and the second desalination water control valve (22), respectively. and / or, a return liquid piping is provided between the drug discharge end of the drug concentration detector (16) and the mixing tank (15), and a return liquid pump (17) is provided in the return liquid piping, and the return liquid pump (17) is electrically connected to the drug concentration detector (16), and / or, the mixing tank (15) is provided with a chemical discharge pipe and a thermometer (18), the chemical discharge pipe is located at the bottom of the mixing tank (15), the chemical discharge pipe is provided with a drain control valve, the thermometer (18) is used to detect the chemical temperature in the mixing tank (15), the thermometer (18) is electrically connected to the drain control valve, and the thermometer (18) and the drain control valve are configured to open the drain control valve to drain the liquid and open the second desalination water control valve (22) to perform cooling by adding water, as described in claim 2.

4. The system for suppressing operating corrosion of the condenser also includes a chemical injection system, the chemical injection system includes a chemical injection pipe, one end of the chemical injection pipe is connected to the mixing tank (15) and the other end is connected to an exhaust pipe (33), the chemical injection pipe is sequentially provided with a first chemical injection control valve (25), a second back pressure valve (27), a chemical injection flow meter (29), and a chemical injection atomizing nozzle (32) along the direction of chemical transport, and the chemical injection atomizing nozzle (32) is provided inside the exhaust pipe (33), as described in claim 3.

5. The system for suppressing operational corrosion of the condenser also includes a chemical monitoring system, the chemical monitoring system includes a condensate sampling system, the condensate sampling system includes a condensate collection tank (34), a first condensate transport pipe and a second condensate transport pipe, the first condensate transport pipe is connected between the exhaust pipe (33) and the water supply end of the condensate collection tank (34), the second condensate transport pipe is connected to the water outlet end of the condensate collection tank (34), the second condensate transport pipe is provided with an iron detector (50) for detecting the iron concentration in the condensate, and the iron detector (50) is electrically connected to the chemical injection flow meter (29), as described in claim 4.

6. The system for suppressing operating corrosion of the condenser also includes a detection system, the detection system comprising a reagent pack chemical tank (36), reagent transport piping, a detection cell (48), and a spectrophotometer (49), the reagent pack chemical tank (36) being used to contain a mixture consisting of catalase, guaiacol / ethanol solution, and potassium bitophthalate-sodium hydroxide buffer, the reagent transport piping being provided with a reagent pack chemical control valve (38) and a first metering loop (46), the reagent transport piping being in communication between the reagent pack chemical tank (36) and the detection cell (48), and being used to transport the mixture to the detection cell (48), The aforementioned drug monitoring system also includes a third condensate transport pipe, the third condensate transport pipe is provided with a condensate sampling control valve (39) and a second metering loop (47), the third condensate transport pipe is connected in parallel with the second condensate transport pipe and is in communication with the detection cell (48), The system for suppressing operating corrosion of a condenser according to claim 5, characterized in that the spectrophotometer (49) is used to detect the absorbance value of the liquid in the detection cell (48), and the spectrophotometer (49) is electrically connected to the drug injection flow meter (29) and the iron detector (50).

7. The system for suppressing operating corrosion of a condenser according to claim 6, characterized in that the chemical monitoring system also comprises a cleaning system, the cleaning system comprises a third demineralized water transport pipe, the third demineralized water transport pipe is in communication with the third condensate transport pipe, and the third demineralized water transport pipe is provided with a third demineralized water control valve (37).

8. A method for suppressing operating corrosion of a condenser, which is applied to the system for suppressing operating corrosion of a condenser as described in claim 7, and the method is The mixing step S200, Step S210 involves injecting desalinated water, wherein the injection of the desalinated water is Step S211 involves controlling the second demineralized water control valve (22) to open and transporting the demineralized water to the mixing tank (15) via the second demineralized water transport pipe, and Step S210 includes step S212, which controls the level meter (14) to detect the liquid level in the mixing tank (15), and if the liquid level in the mixing tank (15) is greater than a first preset liquid level, then steps S220 are performed. Step S220 involves injecting a hydrogen peroxide concentrate, wherein the injection of the hydrogen peroxide concentrate is performed Step S221 involves controlling the reagent supply device (8) to move to the chemical tank (10) and collecting the hydrogen peroxide stock solution, and Step S220 includes step S222, which involves controlling the reagent supply device (8) to move to the drug inlet (13) and transporting the hydrogen peroxide stock to the mixing tank (15), Step S230 is to control the drug concentration and liquid level detection, wherein the control of the drug concentration and liquid level detection is Step S231 involves controlling the drug concentration detector (16) to detect the drug concentration in the mixing tank (15), Step S232 involves determining the relationship between the magnitude of the drug concentration in the mixing tank (15) and the magnitude of the target concentration value, and determining the relationship between the size of the liquid level in the mixing tank (15) and the size of the second preset liquid level. Step S233, when the drug concentration in the mixing tank (15) reaches the target concentration value and the liquid level in the mixing tank (15) reaches the second preset liquid level, the second demineralized water control valve (22) is closed and the collection and transport of the hydrogen peroxide stock by the reagent supply device (8) is stopped, and A method for suppressing operating corrosion of a condenser, comprising step S230, which includes step S234, in which step S210 is performed if the concentration of the agent in the mixing tank (15) reaches a target concentration value and the liquid level in the mixing tank (15) is lower than the first preset liquid level.

9. After step S233, Step S300 for injecting a drug, wherein the drug injection includes the steps of controlling the first drug injection control valve (25), the second back pressure valve (27), and the drug injection flow meter (29) to open, transporting a hydrogen peroxide drug having a target concentration and preset flow rate to the exhaust pipe (33) via the drug injection atomizing nozzle (32), and performing step S400, Step S400 involves detection and feedback control, wherein the detection and feedback control are performed Step S410: Detect the hydrogen peroxide concentration in the condensate. Step S411 involves controlling the third desalination water control valve (37) to open, and cleaning the third condensate transport pipe and the detection cell (48). Step S412 involves controlling the condensate sampling control valve (39) to open, transporting the condensate sample to the detection cell (48) via the second quantitative loop (47), and then closing the condensate sampling control valve (39). Step S413 involves controlling the reagent pack chemical solution control valve (38) to open, transporting the mixture to the detection cell (48) via the first quantitative loop (46), and then closing the reagent pack chemical solution control valve (38). Step S414 involves uniformly mixing the condensed water sample and the mixture over a first preset time to form a reaction solution, and controlling the spectrophotometer (49) to detect the absorbance value of the reaction solution, and Step S400 includes step S415, which involves obtaining the hydrogen peroxide concentration in the condensed water based on the preset relationship between the absorbance value and the hydrogen peroxide concentration, and performing step S411. Step S420 is a feedback control of the iron concentration in condensate, Step S421 involves controlling the iron detector (50) to detect the iron concentration in the condensed water. Step S422: Determine the relationship between the magnitude of the iron concentration in the condensate and the magnitude of the preset iron concentration value. If the iron concentration in the condensate is greater than the preset iron concentration value, the preset flow rate of the drug injection flow meter (29) is increased, and if the iron concentration in the condensate is less than or equal to the preset iron concentration value, step S424 is executed in step S423. Step S424: Determine the relationship between the magnitude of the hydrogen peroxide concentration in the condensate and the magnitude of the preset hydrogen peroxide concentration value, A method for suppressing operating corrosion of a condenser according to claim 8, further comprising step S420, which includes step S425, if the hydrogen peroxide concentration in the condensate is greater than the preset hydrogen peroxide concentration value, the preset flow rate of the chemical injection flow meter (29).

10. The step S100 further includes preparing the chemicals and rinsing, prior to step S220 in which the hydrogen peroxide concentrate is injected, and the preparation of the chemicals and rinsing are Step S110 involves controlling the drug control valve (2) to open and transporting the hydrogen peroxide stock solution to the drug tank (10) via the drug transport piping, Step S120 involves controlling the first desalination water control valve (5) to open and transporting the desalination water to the washing tank (11) via the first desalination water transport pipe, Step S130 involves controlling the reagent supply device (8) to move to the washing tank (11), collecting the desalinated water and washing with it, then controlling the reagent supply device (8) to move to the waste liquid tank (12), and discharging the desalinated water after washing into the waste liquid tank (12), A method for suppressing operating corrosion of a condenser according to claim 9, characterized by including step S140, which involves controlling the reagent supply device (8) to move to the chemical tank (10), collecting the hydrogen peroxide stock solution and rinsing it, then controlling the reagent supply device (8) to move to the waste liquid tank (12), and discharging the rinsed hydrogen peroxide stock solution to the waste liquid tank (12).

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