Urea hydrolysis system of boiler

Abstract

The invention provides a boiler urea hydrolysis system, and relates to the technical field of environmental protection, the boiler urea hydrolysis system comprises a urea dissolving tank, the urea dissolving tank is connected with a urea solution storage tank through a urea dissolving pump, the urea solution storage tank is connected with a hydrolyzer through a urea solution delivery pump, the input end of the hydrolyzer is connected with a steam temperature and pressure reduction device, and the steam temperature and pressure reduction device is connected with a boiler; the output end of the hydrolyzer is connected with the steam-water separator, the steam-water separator is connected with one end of the dilution fan, the other end of the dilution fan is connected with the SCR reactor, and a urea hydrolysis device is arranged in the urea dissolving tank. The urea hydrolysis device is arranged in the urea dissolving tank, and the urea hydrolysis device is driven. Therefore, the problem that in an existing boiler urea hydrolysis system, urea particles are directly mixed with a urea dissolving agent in the urea hydrolysis process, so that the situation of excessive reaction or insufficient reaction is likely to occur in the reaction process, and the ammonia gas generation efficiency is reduced in the prior art is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection, in particular to a boiler urea hydrolysis system. Background Art

[0002] Research on flue gas desulfurization technology has been listed as a priority for preventing and controlling air pollution in many countries, and some practical treatment devices on an industrial scale have been built one after another. At the same time, people have also begun to research and develop prevention and control technologies for another major problem in air pollution, namely the pollution of nitrogen oxides (NOX). NOX will cause photochemical reactions under the action of sunlight to form photochemical smog.

[0003] However, in the existing boiler urea hydrolysis system, urea particles are directly mixed with urea dissolving agent during the urea hydrolysis process, so that over-reaction or under-reaction is likely to occur during the reaction process, thereby causing the problem of reduced ammonia generation efficiency. Therefore, in view of the above situation, it is urgent to develop a boiler urea hydrolysis system to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The present invention provides a boiler urea hydrolysis system to solve the problem raised in the above background technology: in the existing boiler urea hydrolysis system, urea particles are directly mixed with a urea dissolving agent during the urea hydrolysis process, so that over-reaction or under-reaction is likely to occur during the reaction process, thereby causing a problem of reduced ammonia generation efficiency.

[0005] In order to solve the above technical problems, the present invention discloses a boiler urea hydrolysis system, comprising: a urea dissolving tank, the urea dissolving tank is connected to a urea solution storage tank through a urea dissolving pump, the urea solution storage tank is connected to a hydrolyzer through a plurality of urea solution delivery pumps, the hydrolyzer input end is connected to a steam temperature and pressure reduction device, and the hydrolyzer output end is connected to a steam-water separator, the steam-water separator is connected to one end of a dilution fan, the other end of the dilution fan is connected to an SCR reactor, and a urea hydrolysis device is arranged in the urea dissolving tank.

[0006] Preferably, the urea hydrolysis device comprises: a storage chamber, the top of the storage chamber is connected to a delivery pipe, a mechanical valve is fixedly installed on the delivery pipe, a urea granule crushing chamber is arranged in a urea dissolving tank on the right side of the storage chamber, a feeding port is fixedly installed on the urea dissolving tank at the top of the urea granule crushing chamber, and a mixing chamber is arranged at the bottom of the storage chamber and the urea granule crushing chamber, an electromagnetic valve 1 is arranged between the storage chamber and the mixing chamber, an electromagnetic valve 2 is arranged between the urea granule crushing chamber and the mixing chamber, and the bottom of the mixing chamber is connected to a urea dissolving pump through a connecting pipe, and a urea processing mechanism is arranged in the urea dissolving tank.

[0007] Preferably, the urea processing mechanism includes: a driving motor, the driving motor is fixedly mounted on the inner wall of a driving chamber provided at the right end of the urea dissolving tank, and the output end of the driving motor is respectively connected to the rotating shaft one and the rotating shaft two through a belt assembly, one end of the rotating shaft one and the rotating shaft two are movably connected to the inner wall of the driving chamber, and the other end of the rotating shaft one is rotatably connected to the urea granule crushing chamber, and a plurality of crushing rods are fixedly mounted on the rotating shaft one in the urea granule crushing chamber, the other end of the rotating shaft two is rotatably connected to the inner wall of the mixing chamber, and a plurality of stirring rods are fixedly mounted on the rotating shaft two in the mixing chamber.

[0008] Preferably, the urea solution delivery pump uses three full-flow stainless steel multi-stage SS centrifugal variable frequency urea solution delivery pumps, one of which is in operation and the other two are in standby, and a filter is configured at the inlet of the urea solution delivery pump.

[0009] Preferably, the hydrolysis reaction conditions in the hydrolyzer are: pressure 0.5-0.55 MPa and temperature 130-140°C.

[0010] Preferably, urea granule dissolving agent is stored in the storage chamber, and the urea granule dissolving agent is desalted water.

[0011] Preferably, the steam-water separator adopts a wire mesh separator, and further comprises:

[0012] Gas flow rate sensor, used to detect the flow rate of gas in the wire mesh separator;

[0013] Steam density sensor, used to detect the density of steam in the wire mesh separator;

[0014] A controller and an alarm, wherein the controller is electrically connected with the gas flow rate sensor, the steam density sensor and the alarm.

[0015] Preferably, the controller controls the alarm to work based on the gas flow rate sensor and the steam density sensor, comprising the following steps:

[0016] Step 1: According to formula (1) and the gas flow rate sensor detection value, calculate the actual separation efficiency η of the wire mesh separator:

[0017]

[0018] Where S is the total surface area per unit volume of wire mesh separator material, ρ y is the mass of liquid substance per unit volume in the wire mesh separator, V is the detection value of the gas flow rate sensor, d is the average diameter of the liquid droplets in the wire mesh separator, λ is the gas phase viscosity coefficient of the gas in the wire mesh separator, D is the diameter of the wire mesh layer in the wire mesh separator, h is the wire mesh layer spacing in the wire mesh separator, n is the number of wire mesh layers in the wire mesh separator, and π is taken as 3.14;

[0019] Step 2: According to the following formula (2) and the detection value of the steam density sensor, the actual pressure loss P of the gas when passing through the wire mesh separator is calculated. The controller compares the actual pressure loss P of the gas when passing through the wire mesh separator with the preset pressure loss range. When the actual pressure loss exceeds the preset pressure loss range, the controller controls the alarm to sound an alarm:

[0020]

[0021] Where H is the thickness of the wire mesh in the wire mesh separator, χ is the dynamic viscosity of steam, μ is the permeability coefficient of steam, Re is the Reynolds number, δ is the resistance coefficient of steam along the wire mesh separator, ρ q is the detection value of the steam density sensor, is the shape drag coefficient of the wire mesh separator.

[0022] The beneficial effect of the above technical solution is as follows: the present invention places the urea granule dissolving agent and the bagged urea granules into the storage chamber and the urea granule crushing chamber provided in the urea dissolving tank respectively, and then processes them through the urea processing mechanism, and then opens the electromagnetic valve 1 and the electromagnetic valve 2 respectively, and fully mixes the urea granule dissolving agent and the bagged urea granules according to a certain ratio, so as to effectively hydrolyze them, which is conducive to solving the problem that in the existing boiler urea hydrolysis system, the urea granules are directly mixed with the urea dissolving agent during the hydrolysis process of urea, so that the reaction is prone to overreaction or underreaction during the reaction process, thereby causing the problem of reduced ammonia generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A flow chart of a boiler urea hydrolysis system provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the internal structure of a urea dissolution tank provided in an embodiment of the present invention.

[0026] Reference numerals:

[0027] 1. Urea dissolving tank; 2. Urea dissolving pump; 3. Urea solution storage tank; 4. Urea solution delivery pump; 5. Hydrolyzer; 6. Steam-water separator; 7. Dilution fan; 8. SCR reactor; 9. Steam temperature and pressure reduction device; 10. Storage chamber; 11. Delivery pipe; 12. Mechanical valve; 13. Urea granule crushing chamber; 14. Feeding port; 15. Mixing chamber; 16. Solenoid valve 1; 17. Solenoid valve 2; 18. Connecting pipe; 19. Drive motor; 20. Drive chamber; 21. Belt assembly; 22. Rotating shaft 1; 23. Rotating shaft 2; 24. Stirring rod; 25. Crushing rod. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] The present invention provides the following embodiments

[0031] Example 1

[0032] The embodiment of the present invention provides a boiler urea hydrolysis system, such as Figure 1 As shown, it includes: a urea dissolving tank 1, the urea dissolving tank 1 is connected to a urea solution storage tank 3 through a urea dissolving pump 2, the urea solution storage tank 3 is connected to a hydrolyzer 5 through a plurality of urea solution delivery pumps 4, the input end of the hydrolyzer 5 is connected to a steam temperature reduction and pressure reduction device 9, and the output end of the hydrolyzer 5 is connected to a steam-water separator 6, the steam-water separator 6 is connected to one end of a dilution fan 7, the other end of the dilution fan 7 is connected to an SCR reactor 8, and a urea hydrolysis device is arranged in the urea dissolving tank 1.

[0033] The beneficial effects of the above technical scheme are as follows: the present invention places the urea granule dissolving agent and the bagged urea granules into the urea dissolving tank 1, then dissolves the dry urea into a urea solution with a mass concentration of 48-52%, and then delivers it to the urea solution storage tank 3 through the urea dissolving pump 2, and then delivers the urea solution with a mass concentration of about 50% and a temperature of 40°C to the hydrolyzer 5 for decomposition through the urea solution delivery pump 4, and then the steam temperature reduction and pressure reduction device 9 reduces the temperature of the steam to about 180°C, and the saturated steam enters the heating coil in the hydrolyzer 5, and then the hydrolysis reaction is carried out at a pressure of 0.5-0.55MPa and a temperature of 130-140°C to generate a mixed gas of NH3, H2O and CO2. After the mixed gas is separated by the steam-water separator 6, the finished ammonia is output, and sent to the SCR area, after flow adjustment, it is mixed with the hot air generated by the dilution fan 7 in the ammonia-air mixer to dilute the ammonia concentration below 5%, and finally enters the SCR reactor 8 for denitration reaction. The present invention opens electromagnetic valve 16 and electromagnetic valve 2 17 respectively, and then fully mixes the urea granule dissolving agent and the bagged urea granules in a certain proportion, so as to effectively hydrolyze them, thereby effectively improving the problem proposed in the background technology: in the existing boiler urea hydrolysis system, during the urea hydrolysis process, the urea granules are directly mixed with the urea dissolving agent, so that over-reaction or under-reaction is likely to occur during the reaction process, thereby causing the problem of reduced ammonia generation efficiency.

[0034] Example 2

[0035] On the basis of Example 1, Figure 1-2 As shown, a boiler urea hydrolysis system, the urea hydrolysis device comprises: a storage chamber 10, the top of the storage chamber 10 is connected to a delivery pipe 11, a mechanical valve 12 is fixedly installed on the delivery pipe 11, a urea granule crushing chamber 13 is arranged in a urea dissolving tank 1 on the right side of the storage chamber 10, a feeding port 14 is fixedly installed on the top of the urea granule crushing chamber 13, and a mixing chamber 15 is arranged at the bottom of the storage chamber 10 and the urea granule crushing chamber 13, an electromagnetic valve 16 is arranged between the storage chamber 10 and the mixing chamber 15, an electromagnetic valve 2 17 is arranged between the urea granule crushing chamber 13 and the mixing chamber 15, and the bottom of the mixing chamber 15 is connected to the urea dissolving pump 2 through a connecting pipe 18, and a urea processing mechanism is arranged in the urea dissolving tank 1.

[0036] Optionally, the urea processing mechanism includes: a drive motor 19, the drive motor 19 is fixedly mounted on the inner wall of a drive chamber 20 provided at the right end of the urea dissolution tank 1, and the output end of the drive motor 19 is respectively connected to a rotating shaft 22 and a rotating shaft 23 through a belt assembly 21, one end of the rotating shaft 22 and the rotating shaft 23 are movably connected to the inner wall of the drive chamber 20, and the other end of the rotating shaft 22 is rotatably connected to the urea granule crushing chamber 13, and a plurality of crushing rods 25 are fixedly mounted on the rotating shaft 12 in the urea granule crushing chamber 13, the other end of the rotating shaft 23 is rotatably connected to the inner wall of the mixing chamber 15, and a plurality of stirring rods 24 are fixedly mounted on the rotating shaft 23 in the mixing chamber 15.

[0037] Optionally, the urea solution delivery pump 4 uses three full-flow stainless steel multi-stage SS centrifugal variable frequency urea solution delivery pumps, one of which is in operation and the other two are in standby, and a filter is configured at the inlet of the urea solution delivery pump 4 .

[0038] Optionally, the hydrolysis reaction conditions in the hydrolyzer 5 are: pressure 0.5-0.55 MPa, temperature 130-140°C.

[0039] Optionally, the storage chamber 10 stores urea granule dissolving agent, and the urea granule dissolving agent is desalted water.

[0040] The working principle of the above technical solution is as follows: first, the urea is transported to the urea dissolving tank 1 by the pneumatic conveying device of the tank truck or transported by a forklift, or the bagged urea granules are manually broken and then transported to the urea granule crushing chamber 13 in the urea dissolving tank 1 by the bucket elevator through the feeding port 14, and then the urea granule dissolving agent is transported to the storage chamber 10 through the conveying pipe 11 by opening the mechanical valve 12, and then the driving motor 19 is started, and the starting of the driving motor 19 drives the belt assembly 21 to rotate, and the rotation of the belt assembly 21 drives the rotating shaft 22 connected thereto to rotate accordingly, and the rotation of the rotating shaft 22 drives the fixedly connected The plurality of crushing rods 25 rotate, thereby effectively crushing the urea granules in the urea granule crushing chamber 13, and then by opening the electromagnetic valve 16 and the electromagnetic valve 2 17, the opening and closing time of the electromagnetic valve 16 and the electromagnetic valve 2 17 are controlled at the same time, so that a certain proportion of urea granule dissolving agent and urea granules are transported to the mixing chamber 15, and then the rotation of the belt assembly 21 drives the rotating shaft 23 to rotate accordingly, and through the rotation of the plurality of stirring rods 24, the hydrolysis in the mixing chamber 15 is reacted quickly, and after the reaction is completed, it is transported to the urea solution storage tank 3 through the connecting pipe 18 and the urea dissolving pump 2, so as to be subjected to the next step.

[0041] The beneficial effects of the above technical solution are as follows: by providing the delivery pipe 11 and the mechanical valve 12, it is beneficial to realize the delivery of the urea granule dissolving agent in the storage chamber 10; by providing the feeding port 14, it is beneficial to realize the effective delivery of urea granules; by providing the driving motor 19, the rotating shaft 1 22 and the rotating shaft 2 23, it is beneficial to realize the effective crushing of large urea particles in the urea granule crushing chamber 13, and prevent the reaction rate from being different during the reaction with the urea granule dissolving agent, resulting in insufficient hydrolysis; by providing the rotating shaft 2 23 and the stirring rod 24, it is beneficial to realize the full reaction of the material in the mixing chamber 15; by providing the electromagnetic valve 1 16 and the electromagnetic valve 2 17, by controlling the opening and closing time of the electromagnetic valve 16 and the electromagnetic valve 2 17, it is beneficial to realize the adjustment of the ratio of the urea granule dissolving agent and the urea granules, which is very convenient and practical.

[0042] Example 3

[0043] Based on Example 1 or 2, a boiler urea hydrolysis system, wherein the steam-water separator 6 is a wire mesh separator, further comprises:

[0044] Gas flow rate sensor, used to detect the flow rate of gas in the wire mesh separator;

[0045] Steam density sensor, used to detect the density of steam in the wire mesh separator;

[0046] A controller and an alarm, wherein the controller is electrically connected with the gas flow rate sensor, the steam density sensor and the alarm.

[0047] Optionally, the controller controls the alarm to work based on the gas flow rate sensor and the steam density sensor, comprising the following steps:

[0048] Step 1: According to formula (1) and the gas flow rate sensor detection value, calculate the actual separation efficiency η of the wire mesh separator:

[0049]

[0050] Where S is the total surface area per unit volume of wire mesh separator material, ρ y is the mass of liquid substance per unit volume in the wire mesh separator, V is the detection value of the gas flow rate sensor, d is the average diameter of the liquid droplets in the wire mesh separator, λ is the gas phase viscosity coefficient of the gas in the wire mesh separator (a physical quantity describing the magnitude of the internal friction force when the gas flows, with a value range of 0.15-0.28kg / (m·s)), D is the diameter of the wire mesh layer in the wire mesh separator, h is the wire mesh layer spacing in the wire mesh separator, n is the number of wire mesh layers in the wire mesh separator, and π is 3.14;

[0051] Step 2: According to the following formula (2) and the detection value of the steam density sensor, the actual pressure loss P of the gas when passing through the wire mesh separator is calculated. The controller compares the actual pressure loss P of the gas when passing through the wire mesh separator with the preset pressure loss range. When the actual pressure loss exceeds the preset pressure loss range, the controller controls the alarm to sound an alarm:

[0052]

[0053] Where H is the thickness of the wire mesh in the wire mesh separator, χ is the dynamic viscosity of the steam, and μ is the permeability coefficient of the steam (the range is 0.5-5g / m 2 h), Re is the Reynolds number, δ is the resistance coefficient of steam along the wire mesh separator (the range is 0.002-0.03), ρ q is the detection value of the steam density sensor, is the shape resistance coefficient of the wire mesh separator (the value range is 0.25-0.46).

[0054] The beneficial effects of the above technical solution are as follows: the controller calculates the actual separation efficiency of the wire mesh separator based on the formula (1) and the detection value of the gas flow rate sensor, and comprehensively considers the total surface area of ​​the wire mesh separator material per unit volume, the mass of the liquid substance per unit volume in the wire mesh separator, the average diameter of the liquid droplets in the wire mesh separator, the gas phase viscosity coefficient of the gas in the wire mesh separator, the diameter of the wire mesh layer in the wire mesh separator, the wire mesh layer spacing in the wire mesh separator, and the number of wire mesh layers in the wire mesh separator, so that the calculation result is more accurate and reliable;

[0055] Then, according to the formula (2) and the detection value of the steam density sensor, the thickness of the wire mesh in the wire mesh separator, the dynamic viscosity of the steam, the permeability coefficient of the steam, the Reynolds number, the resistance coefficient of the steam along the wire mesh separator, the steam density in the wire mesh separator, and the shape resistance coefficient of the wire mesh separator, the actual pressure loss of the gas when passing through the wire mesh separator is calculated, so that the calculation result is more accurate and reliable;

[0056] The controller compares the actual pressure loss experienced by the gas when passing through the wire mesh separator with the preset pressure loss range. When the actual pressure loss exceeds the preset pressure loss range, the controller controls the alarm to sound an alarm, thereby reminding the staff to promptly inspect or replace the wire mesh separator, thereby meeting the user's needs for this boiler urea hydrolysis system.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A boiler urea hydrolysis system, characterized in that: include: A urea dissolving tank (1), wherein the urea dissolving tank (1) is connected to a urea solution storage tank (3) via a urea dissolving pump (2), the urea solution storage tank (3) is connected to a hydrolyzer (5) via a plurality of urea solution delivery pumps (4), the input end of the hydrolyzer (5) is connected to a steam temperature reduction and pressure reduction device (9), and the output end of the hydrolyzer (5) is connected to a steam-water separator (6), the steam-water separator (6) is connected to one end of a dilution fan (7), the other end of the dilution fan (7) is connected to an SCR reactor (8), and a urea hydrolysis device is arranged in the urea dissolving tank (1).

2. A boiler urea hydrolysis system according to claim 1, characterized in that: The urea hydrolysis device comprises: a storage chamber (10), the top end of the storage chamber (10) is connected to a delivery pipe (11), a mechanical valve (12) is fixedly installed on the delivery pipe (11), a urea granule crushing chamber (13) is arranged in a urea dissolving tank (1) on the right side of the storage chamber (10), a feeding port (14) is fixedly installed on the urea dissolving tank (1) at the top end of the urea granule crushing chamber (13), a mixing chamber (15) is arranged at the bottom ends of the storage chamber (10) and the urea granule crushing chamber (13), a first electromagnetic valve (16) is arranged between the storage chamber (10) and the mixing chamber (15), a second electromagnetic valve (17) is arranged between the urea granule crushing chamber (13) and the mixing chamber (15), the bottom end of the mixing chamber (15) is connected to a urea dissolving pump (2) through a connecting pipe (18), and a urea processing mechanism is arranged in the urea dissolving tank (1).

3. A boiler urea hydrolysis system according to claim 2, characterized in that The urea processing mechanism comprises: a driving motor (19), the driving motor (19) is fixedly mounted on the inner wall of a driving chamber (20) provided at the right end of a urea dissolving tank (1), and the output end of the driving motor (19) is respectively connected to a rotating shaft 1 (22) and a rotating shaft 2 (23) through a belt assembly (21), one end of the rotating shaft 1 (22) and the rotating shaft 2 (23) are movably connected to the inner wall of the driving chamber (20), and the other end of the rotating shaft 1 (22) is rotatably connected to a urea granule crushing chamber (13), and a plurality of crushing rods (25) are fixedly mounted on the rotating shaft 1 (22) in the urea granule crushing chamber (13), and the other end of the rotating shaft 2 (23) is rotatably connected to the inner wall of a mixing chamber (15), and a plurality of stirring rods (24) are fixedly mounted on the rotating shaft 2 (23) in the mixing chamber (15).

4. A boiler urea hydrolysis system according to claim 1, characterized in that: The plurality of urea solution delivery pumps (4) are three full-flow stainless steel multi-stage SS centrifugal variable frequency urea solution delivery pumps, one of which is in operation and the other two are in standby, and a filter is arranged at the inlet of the urea solution delivery pump (4).

5. A boiler urea hydrolysis system according to claim 1, characterized in that: The hydrolysis reaction conditions in the hydrolyzer (5) are: pressure 0.5-0.55 MPa and temperature 130-140°C.

6. A boiler urea hydrolysis system according to claim 2, characterized in that The storage chamber (10) stores urea granule dissolving agent, and the urea granule dissolving agent is desalted water.

7. A boiler urea hydrolysis system according to claim 1, characterized in that: The steam-water separator (6) is a wire mesh separator and further comprises: Gas flow rate sensor, used to detect the flow rate of gas in the wire mesh separator; Steam density sensor, used to detect the density of steam in the wire mesh separator; A controller and an alarm, wherein the controller is electrically connected with the gas flow rate sensor, the steam density sensor and the alarm.

8. A boiler urea hydrolysis system according to claim 7, characterized in that: The controller controls the alarm to work based on the gas flow rate sensor and the steam density sensor, including the following steps: Step 1: According to formula (1) and the gas flow rate sensor detection value, calculate the actual separation efficiency η of the wire mesh separator: Where S is the total surface area per unit volume of wire mesh separator material, ρ y is the mass of liquid substance per unit volume in the wire mesh separator, V is the detection value of the gas flow rate sensor, d is the average diameter of the liquid droplets in the wire mesh separator, λ is the gas phase viscosity coefficient of the gas in the wire mesh separator, D is the diameter of the wire mesh layer in the wire mesh separator, h is the wire mesh layer spacing in the wire mesh separator, n is the number of wire mesh layers in the wire mesh separator, and π is taken as 3.14; Step 2: According to the following formula (2) and the detection value of the steam density sensor, the actual pressure loss P of the gas when passing through the wire mesh separator is calculated. The controller compares the actual pressure loss P of the gas when passing through the wire mesh separator with the preset pressure loss range. When the actual pressure loss exceeds the preset pressure loss range, the controller controls the alarm to sound an alarm: Where H is the thickness of the wire mesh in the wire mesh separator, χ is the dynamic viscosity of steam, μ is the permeability coefficient of steam, Re is the Reynolds number, δ is the resistance coefficient of steam along the wire mesh separator, ρ q is the detection value of the steam density sensor, is the shape drag coefficient of the wire mesh separator.

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