An external vapor-liquid separation system

Abstract

The present application belongs to the technical field of steam-water separation, and particularly relates to an external steam-liquid separation system. The present application is characterized in that sampling devices are arranged at the inlet and outlet of the wave plate dryer and the wire mesh separator, and the conductivity of the condensate water of the sampled steam-liquid mixture is measured in real time and on line, so as to monitor the steam-liquid separation efficiency of the wave plate dryer and the wire mesh separator. Meanwhile, the distance between the wave plates in the wave plate dryer and the thickness of the wire mesh area in the wire mesh separator are adjusted in real time, so that the external steam-liquid separation system provided by the present application can meet the actual requirements through on-line adjustment even when a local fault occurs, and the overall operation of the device is not affected. The external steam-liquid separation system provided by the present application can be provided with multiple groups of wire mesh separators, so as to meet different steam-liquid separation efficiency requirements, and when a group of wire mesh separators fails, the group of wire mesh separators can be disassembled and replaced without affecting the operation of the device.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of steam-water separation, and particularly relates to an external steam-liquid separation system. BACKGROUND

[0002] Steam is widely used as a heat carrier in industrial production, especially in the power generation industry. During steam transportation, if the steam is not dehumidified, too much water carried in the steam will cause equipment corrosion and damage, so it is necessary to dehumidify the wet steam and control the steam humidity within a reasonable range. At present, the most commonly used method for dehumidifying water vapor is to install a steam-water separator.

[0003] The steam-water separation device mainly separates liquid droplets from wet steam through physical means to achieve the purpose of dehumidification. At present, there are many excellent design schemes applied in steam-water separation, such as the invention patent with the patent number CN110090518B and the name of a steam-water separator device, which mainly includes an outer cylinder, an inner cylinder, a first steel wire mesh, and a second steel wire mesh. The device filters the steam through the first steel wire mesh and the second steel wire mesh to separate the liquid water in the steam, and has the advantages of simple structure, high separation efficiency, etc.

[0004] The existing device has poor corrosion resistance, is difficult to disassemble and replace, does not have the function of real-time online measurement of steam humidity, and cannot optimize the structure of the separation device according to real-time working conditions. The total amount of water vapor separation and the separation efficiency cannot be considered at the same time. SUMMARY

[0005] The purpose of the present application is to solve the problems of poor corrosion resistance of the steam-water separation device, difficulty in disassembly and replacement, inability to real-time online measure the steam humidity and optimize the structure of the separation device according to the real-time working conditions, and inability to consider the total amount of water vapor separation and the separation efficiency at the same time, and to provide an external steam-liquid separation system.

[0006] An external steam-liquid separation system includes a wave plate dryer and a wire mesh separator. The bottom of the wave plate dryer is connected with an inlet pipe, the top of the wave plate dryer is connected with the inlet of the wire mesh separator through a pipe, and the outlet of the wire mesh separator is connected with an exhaust passage. The steam-liquid mixture enters the wave plate dryer for preliminary steam-liquid separation through the inlet pipe, and then further steam-liquid separation is carried out through the wire mesh separator, and finally discharged through the exhaust passage. Sampling devices are arranged at the inlet pipe of the wave plate dryer, the outlet pipe of the wave plate dryer and the exhaust passage to take samples of the steam-liquid mixture, and condensate water is obtained through a cooler. The steam-liquid separation efficiency of the wave plate dryer and the wire mesh separator is calculated by measuring the conductivity of the condensate water of the steam-liquid mixture, and the wave plate dryer and the wire mesh separator are adjusted in real time to meet the preset conditions.

[0007] Furthermore, the sampling device includes a sampling pipe, one end of which extends into the pipeline containing the vapor-liquid mixture for sampling; outside the pipeline containing the vapor-liquid mixture, a differential pressure flow meter and a valve are installed on the sampling pipe to control the opening of the valve and change the flow rate G2 of the vapor-liquid mixture in the sampling pipe, so as to ensure that the flow velocity v1 of the vapor-liquid mixture in the pipeline containing the vapor-liquid mixture is equal to the flow velocity v2 of the vapor-liquid mixture in the sampling pipe during the sampling process, i.e., v1=v2;

[0008] v1=G1 / A1, v2=G2 / A2

[0009] Wherein, G1 is the flow rate of the vapor-liquid mixture at the end of the sampling pipe in the pipeline containing the vapor-liquid mixture, which is obtained by the volumetric flow meter in the pipeline containing the vapor-liquid mixture; G2 is the flow rate of the vapor-liquid mixture in the sampling pipe, which is obtained by the differential pressure flow meter in the sampling pipe; A1 is the cross-sectional area of ​​the pipeline containing the vapor-liquid mixture; and A2 is the cross-sectional area of ​​the sampling pipe.

[0010] Furthermore, the conductivity of the condensate from the vapor-liquid mixture sampled at the inlet pipe of the corrugated plate dryer is... The conductivity of the condensate from the vapor-liquid mixture sampled at the outlet pipe of the corrugated plate dryer is... The conductivity of the condensate of the vapor-liquid mixture sampled at the exhaust channel is... ;

[0011] Based on the conductivity of the pure liquid in the vapor-liquid mixture The vapor-liquid separation efficiency of the corrugated plate dryer is... for:

[0012]

[0013] Separation efficiency of wire mesh separator for:

[0014] .

[0015] Furthermore, the corrugated plate dryer is internally provided with a corrugated plate channel, which includes a central fixed corrugated plate and two outer corrugated plates on both sides. By adjusting the outer corrugated plates on both sides, the distance d between the three sets of corrugated plates is changed, thereby adjusting the vapor-liquid separation efficiency of the corrugated plate dryer. ;

[0016]

[0017] in, The coefficient of the constant term, , , The coefficient of the linear term, , , The coefficients of the quadratic interaction term, , , These are the coefficients of the quadratic term. These coefficients can be obtained through pre-calibration experiments and calculated using a multi-objective optimization genetic algorithm; u in1 The flow rate of the vapor-liquid mixture at the inlet of the corrugated plate dryer is obtained by sensor measurement. The humidity at the inlet of the corrugated plate dryer. .

[0018] Furthermore, both the central fixed waveform board and the two outer waveform boards adopt a double-hook waveform board structure.

[0019] Furthermore, the device for adjusting the spacing between the three sets of waveform plates includes an adjustable bolt, a fixing nut, and a fixing washer; the two outer waveform plates are moved by the adjustable bolt, the fixing nut is fixed to the outside of the outer housing, and the fixing washer is arranged on the outside of the two outer waveform plates to increase the contact area between the adjustable bolt and the two outer waveform plates.

[0020] Furthermore, the corrugated plate dryer is equipped with an upper baffle and a lower baffle. Gas equalization plates are arranged on the left and right sides of the space between the upper and lower baffles. A corrugated plate channel is arranged behind the gas equalization plates. An inlet for the vapor-liquid mixture is opened in the middle of the lower baffle, and an outlet for the vapor-liquid mixture is opened on the upper baffle above the outlet of the corrugated plate channel. The vapor-liquid mixture enters the interior of the corrugated plate dryer through an injection pipe, enters the space between the upper and lower baffles from the vapor-liquid mixture inlet, and flows to both ends. First, it passes through the gas equalization plates to make the vapor flow more evenly distributed in the space. Then, after preliminary vapor-liquid separation through the corrugated plate channel, it flows out of the corrugated plate dryer through the vapor-liquid mixture outlet.

[0021] Furthermore, the wire mesh separator includes stacked wire meshes, and the vapor-liquid separation efficiency of the wire mesh separator can be adjusted by regulating the total thickness t of the wire mesh area. ;

[0022]

[0023] in, The coefficient of the constant term, , , coefficient of the first term, , , The coefficients of the quadratic interaction term, , , These are the coefficients of the quadratic term. These coefficients can be obtained through pre-calibration experiments and calculated using a multi-objective optimization genetic algorithm; u in2The flow rate of the gas-liquid mixture at the inlet of the wire mesh separator is obtained by measurement using a sensor. Humidity at the inlet of the wire mesh separator .

[0024] Furthermore, the device for adjusting the total thickness of the wire mesh area includes a nut, an adjusting bolt, a top wire mesh frame, and a bottom wire mesh frame; the top wire mesh frame is fixed to the housing of the wire mesh separator by a fixing rod; the wire mesh is stacked between the top wire mesh frame and the bottom wire mesh frame; the bottom wire mesh frame is connected to the housing of the wire mesh separator by a nut and an adjusting bolt; by rotating the nut to move the bottom wire mesh frame, the distance between the top wire mesh frame and the bottom wire mesh frame is adjusted, thereby adjusting the degree of wire mesh compression and controlling the total thickness t of the wire mesh area.

[0025] Furthermore, the wire mesh separator has multiple sets. The top of the corrugated plate dryer is connected to the inlet of each set of wire mesh separators through pipelines. The outlets of all wire mesh separators are collected through pipelines and connected to the exhaust channel. Valves are installed on the inlet and outlet pipelines of each set of wire mesh separators. Multiple sets of wire mesh separators work simultaneously. If the gas-liquid separation efficiency of a certain set of wire mesh separators is found to be substandard, that set of wire mesh separators is shut down, the valves on its inlet and outlet pipelines are closed, and it is disassembled and replaced without affecting the overall operation of the external gas-liquid separation system.

[0026] The beneficial effects of this invention are as follows:

[0027] This invention employs sampling devices at the inlet and outlet of the corrugated plate dryer and the wire mesh separator to measure the conductivity of the condensate from the sampled vapor-liquid mixture in real time. This allows for monitoring the vapor-liquid separation efficiency of the corrugated plate dryer and the wire mesh separator. Simultaneously, by adjusting the spacing of the corrugated plates in the corrugated plate dryer and the thickness of the wire mesh area in the wire mesh separator in real time, the external vapor-liquid separation system provided by this invention can still meet actual requirements through online adjustments even in the event of a partial failure, without affecting the overall operation of the device. The external vapor-liquid separation system provided by this invention can have multiple sets of wire mesh separators as backup to meet different vapor-liquid separation efficiency requirements. Furthermore, when a set of wire mesh separators fails, it can be disassembled and replaced without affecting the operation of the device. This invention uses a combination of corrugated plate dryers and wire mesh separators, balancing the total amount and efficiency of vapor-liquid mixture separation. This ensures continuous and stable operation of the system while improving the total amount and quality of vapor-liquid separation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the layout of an external vapor-liquid separation system according to the present invention.

[0029] Figure 2 This is a schematic diagram of the arrangement of the sampling device in this invention.

[0030] Figure 3 This is a schematic diagram of the corrugated plate dryer in this invention.

[0031] Figure 4 This is a schematic diagram of the wire mesh separator in this invention. Detailed Implementation

[0032] The present invention will now be further described with reference to the accompanying drawings.

[0033] like Figure 1 As shown, the present invention provides an external vapor-liquid separation system, including a gas equalization perforated plate 1, a double-hook corrugated plate 2, a lower baffle 3, a corrugated plate dryer 4, an upper baffle 5, a wastewater tank 6, a volumetric flow meter 7, a wire mesh separator 8, a wire mesh separator housing 9, a sampling bottle 11, a cooler 12, a centrifugal pump 13, and a cooling water tank 14. Figure 1 The valve arrangement is shown in the table below:

[0034]

[0035] The bottom of the corrugated plate dryer 4 is connected to the injection pipe, and the top of the corrugated plate dryer 4 is connected to the inlet of the wire mesh separator 8 through a pipe. The outlet of the wire mesh separator 8 is connected to the exhaust channel. The vapor-liquid mixture enters the corrugated plate dryer 4 through the injection pipe for preliminary vapor-liquid separation, and then passes through the wire mesh separator 8 for further vapor-liquid separation. Finally, it is discharged through the exhaust channel.

[0036] According to the actual working conditions, valve VA1 or VA5 is opened, and the vapor-liquid mixture enters the wire mesh separator through the pipeline. After further separation by the wire mesh separator, it flows to the next stage through valves VA3 and VA6. At the same time, valve VA2 or VA4 is opened, and the separated droplets flow into the wastewater tank 6 for collection. Meanwhile, valves VA7, VA8, and VA9 are adjusted. Sampling devices are installed at the inlet pipeline, outlet pipeline, and exhaust channel of the corrugated plate dryer 4. The sampling devices take samples at these three locations. The cooling water pipeline valve VA10 is opened, and the water in the cooling water tank 14 is driven by the centrifugal pump 13 to cool the sampled steam in the cooler 12. The sampled steam condenses after cooling, and the condensate is collected using sampling bottle 11. The conductivity of the condensate is measured using a conductivity meter. The vapor-liquid separation efficiency of the corrugated plate dryer 4 and the wire mesh separator 8 is calculated based on the conductivity, and the corrugated plate dryer 4 and the wire mesh separator 8 are adjusted in real time to meet the preset conditions.

[0037] like Figure 2As shown, the sampling device includes a sampling pipe 15, one end of which extends into the pipeline containing the vapor-liquid mixture for sampling. A differential pressure flow meter 17 and a valve 18 are installed on the sampling pipe 15 outside the pipeline containing the vapor-liquid mixture. The vapor-liquid mixture entering the sampling pipe 15 is liquefied under the action of the cooler 12, and the condensate is collected through the sampling bottle 11. A probe-type sampling method is used. To reduce interference from the sampling tube to the airflow, the inlet of the sampling tube is designed with an acute angle, and the sampling port is directly facing the steam for sampling.

[0038] To ensure sampling accuracy, isokinetic sampling must be adopted. The flow rate G1 (m³ / s) of the vapor-liquid mixture in the pipeline is measured around the end of the sampling pipe 15, which extends into the pipeline containing the vapor-liquid mixture, using a volumetric flow meter 7. 3 The vapor velocity v1 (m / h) at the sampling point in the pipeline containing the vapor-liquid mixture is calculated according to the following formula:

[0039] v1=G1 / A1

[0040] Where A1 is the cross-sectional area of ​​the pipeline containing the vapor-liquid mixture, in meters. 2 ;

[0041] The flow rate G2 (m³) of the vapor-liquid mixture in sampling pipe 15 was measured by differential pressure flow meter 17 on sampling pipe 15. 3 / h), and then the flow velocity v2 (m / h) of the vapor-liquid mixture in sampling pipe 15 is calculated according to the following formula:

[0042] v2=G2 / A2

[0043] Where A2 is the cross-sectional area of ​​sampling pipe 15, in meters. 2 ;

[0044] The opening of valve 18 is adjusted according to the reading of differential pressure flow meter 17 to change the flow rate G2 of vapor-liquid mixture in sampling pipe 15, so as to ensure that the flow velocity v1 of vapor-liquid mixture in the pipeline where vapor-liquid mixture is located is equal to the flow velocity v2 of vapor-liquid mixture in sampling pipe 15 during the sampling process, i.e., v1=v2. Sampling is carried out under this condition.

[0045] Separation efficiency is a crucial indicator of the separation performance of a separation device, determining the quality of the steam exiting the device. This invention employs the conductivity method to measure the inlet and outlet humidity of the separation device, and then calculates the separation efficiency based on the humidity. The conductivity method is based on the fact that at steam pressures below 6 MPa, salts dissolve only in water and not in water vapor; therefore, the salt content in the condensate is equal to the salt content in the mixed steam.

[0046] G in S in =G w S w

[0047]

[0048] Among them, G in The mass flow rate of the mixed steam is kg / h; G w The sampled steam condensate volume is expressed in kg / h; S in The salt concentration in the sampled steam is %; S w To determine the salt concentration of the sampled steam condensate, %

[0049] The solution was calibrated to obtain the conductivity of aqueous solutions of different concentrations (conductivity is directly proportional to solution concentration). The inlet and outlet humidity of the separation device is then determined as follows:

[0050] ,

[0051] In the formula, The humidity of the steam at the inlet of the separation unit; The humidity of the steam at the outlet of the separation unit; Conductivity of steam condensate sampled at the inlet of the separation unit; Conductivity of steam condensate sampled at the outlet of the separation unit; The electrical conductivity of boiler water (the pure liquid corresponding to steam);

[0052] Based on the above calculations of inlet and outlet humidity, the separation efficiency of the separation device is:

[0053]

[0054] Based on the above, the conductivity of the condensate of the vapor-liquid mixture sampled at the inlet pipe of the corrugated plate dryer 4 in this invention is... The conductivity of the condensate from the vapor-liquid mixture sampled at the outlet pipe of the corrugated plate dryer 4 is... The conductivity of the condensate from the vapor-liquid mixture sampled at the exhaust channel is... ;

[0055] Based on the conductivity of the pure liquid in the vapor-liquid mixture The vapor-liquid separation efficiency of the corrugated plate dryer 4 is... for:

[0056]

[0057] The separation efficiency of wire mesh separator 8 for:

[0058] .

[0059] like Figure 1 andFigure 3 As shown, the corrugated plate dryer 4 has an upper baffle 5 and a lower baffle 3 inside. Gas equalization plates 1 are arranged on the left and right sides of the space between the upper baffle 5 and the lower baffle 3. A corrugated plate channel is arranged behind the gas equalization plates 1. A vapor-liquid mixture inlet is opened in the middle of the lower baffle 3, and a vapor-liquid mixture outlet 23 is opened on the upper baffle 5 above the outlet of the corrugated plate channel. The vapor-liquid mixture enters the corrugated plate dryer 4 through the injection pipe, and enters the space between the upper baffle 5 and the lower baffle 3 from the vapor-liquid mixture inlet. The vapor-liquid mixture flows to both ends, first passing through the gas equalization plates 1 to make the vapor flow more evenly distributed in the space, and then undergoing preliminary vapor-liquid separation through the corrugated plate channel before flowing out of the corrugated plate dryer 4 through the vapor-liquid mixture outlet 23. The central fixed corrugated plate and the two outer corrugated plates on both sides all adopt a double-hook type corrugated plate structure. The device for adjusting the spacing between the three sets of corrugated plates includes an adjustable bolt 19, a fixing nut 20, and a fixing washer 21. The two outer corrugated plates are moved by the adjustable bolt 19, the fixing nut 20 is fixed to the outside of the outer housing, and the fixing washer 21 is arranged on the outside of the two outer corrugated plates to increase the contact area between the adjustable bolt 19 and the two outer corrugated plates.

[0060] like Figure 4 As shown, the device for adjusting the total thickness of the wire mesh area includes a nut 24, an adjusting bolt 25, a top wire mesh frame 26, a bottom wire mesh frame 27, and a fixing rod 29. The top wire mesh frame 26 is fixed to the surface of the housing of the wire mesh separator 8, and the fixing rod 29 fixes the distance between the right side surface of the housing of the wire mesh separator 8 and the top wire mesh frame 26. Wire mesh 28 is stacked between the top wire mesh frame 26 and the bottom wire mesh frame 27. The wire mesh 28 can be made of titanium alloy with a ceramic coating to enhance the corrosion resistance of the wire mesh separator. The bottom wire mesh frame 27 is connected to the housing of the wire mesh separator 8 by the nut 24 and the adjusting bolt 25. By rotating the nut 24, the bottom wire mesh frame 27 is moved, adjusting the distance between the top wire mesh frame 26 and the bottom wire mesh frame 27, thereby adjusting the compression degree of the wire mesh 28 and controlling the total thickness t of the wire mesh area.

[0061] like Figure 1 As shown, the wire mesh separator 8 can have multiple sets ( Figure 1(Two sets are shown in the diagram). The top of the corrugated plate dryer 4 is connected to the inlet of each set of wire mesh separators 8 through pipelines. The outlets of all wire mesh separators 8 are collected through pipelines and connected to the exhaust channel. Valves are installed on the inlet and outlet pipelines of each set of wire mesh separators 8. When the separation capacity of one set of wire mesh separators is insufficient, multiple sets of wire mesh separators can be opened simultaneously for separation. By having multiple sets of wire mesh separators 8 working at the same time, the overall gas-liquid separation efficiency of the external gas-liquid separation system is increased. If the gas-liquid separation efficiency of a certain set of wire mesh separators 8 is found to be substandard, then that set of wire mesh separators 8 is shut down, and the valves on its inlet and outlet pipelines are closed. It is then disassembled and replaced without affecting the overall operation of the external gas-liquid separation system.

[0062] The parameter optimization process of the separation device in this invention is as follows:

[0063] (1) Select the optimization objective and design variables, and determine the constraints and their ranges;

[0064] Based on existing experimental data and practical application scenarios, the corrugated plate dryer uses three variable parameters as design variables: inlet velocity, inlet humidity, and corrugated plate spacing. The wire mesh separator uses three parameters as design parameters: airflow velocity, separator thickness, and inlet humidity. The separation efficiency of the separation device is used as the optimization target.

[0065] (2) Select experimental data points using orthogonal experimental design method;

[0066] Based on the number of variables and the classification, find the corresponding orthogonal array. According to the arrangement in the table, select the representative experimental data points to form the final experimental group, so as to achieve the same result as conducting all experiments with fewer experiments.

[0067] (3) Obtain the fitting model of the objective function and design variables through the response surface methodology;

[0068] After conducting experiments based on orthogonal experimental design, the relationship between factors and corresponding response values ​​is fitted using the response surface methodology. In this invention, a quadratic regression equation, i.e., a second-order polynomial, is used to approximate the true functional relationship. Its theoretical formula can be written as:

[0069]

[0070] Where Y is the optimization objective, X is the set of design variables, and x i For the i-th design variable, x j For the j-th design variable, , , , These are the coefficients of the constant term, the first-order term, the second-order term, and the second-order interaction term, respectively. This is the error.

[0071] Based on the above process, the data from the orthogonal experimental design were analyzed using the response surface methodology to obtain the fitted polynomial. Simultaneously, after fitting, the fitted model was tested; if the model showed good fit, the optimal response value could be determined.

[0072] (4) Obtain the Pareto optimal solution that satisfies the optimization objective using the NSGA-II algorithm;

[0073] This invention employs an improved Non-Dominated Sorting Genetic Algorithm (NSGA-II) for parameter optimization of a waveform plate dryer. Its main advantage lies in reducing computational complexity, offering advantages such as faster computation speed, better solution set convergence, and more accurate results. The NSGA-II algorithm has gradually become a standard for verifying the performance of other multi-objective optimization algorithms. The NSGA algorithm is a highly efficient multi-objective optimization genetic algorithm based on non-dominated sorting. Its efficiency stems from the fact that the fit between the design variables and the optimization objective can be directly used as the fitness function for subsequent operations, avoiding the cumbersome process of fitness value allocation. However, the NSGA algorithm has been neglected due to its computational complexity, the inability to retain superior individuals from the parent generation, and the need to pre-set shared parameters. The improved NSGA algorithm, NSGA-II, however, has a better sorting algorithm, employs an elitist approach, and eliminates the need for pre-setting shared parameters.

[0074] (5) Complete the iterative operation for the specified number of evolutions to obtain the final set of multi-objective optimization schemes.

[0075] After simplifying the optimization objective fitting model, the vapor-liquid separation efficiency of the corrugated plate dryer 4 was finally obtained. The relationship between the design parameters and the formula is:

[0076]

[0077] in, The coefficient of the constant term, , , The coefficient of the linear term, , , The coefficients of the quadratic interaction term, , , These are the coefficients of the quadratic term. These coefficients can be obtained through pre-calibration experiments and calculated using a multi-objective optimization genetic algorithm; u in1 The velocity of the vapor-liquid mixture at the inlet of the corrugated plate dryer 4, in m / s, is obtained by sensor measurement. The humidity at the inlet of the corrugated plate dryer 4 is %. d represents the spacing between the corrugated plates, in mm.

[0078] Vapor-liquid separation efficiency of mesh separator 8 The relationship between the design parameters and the formula is:

[0079]

[0080] in, The coefficient of the constant term, , , coefficient of the first term, , , The coefficients of the quadratic interaction term, , These are the coefficients of the quadratic term. These coefficients can be obtained through pre-calibration experiments and calculated using a multi-objective optimization genetic algorithm; u in2 The velocity of the gas-liquid mixture at the inlet of wire mesh separator 8, in m / s, is obtained by sensor measurement. Humidity at the inlet of wire mesh separator 8, %. t represents the thickness of the wire mesh, in mm.

[0081] Based on the optimal plate spacing of the corrugated plate dryer and the optimal thickness of the wire mesh separator obtained by a multi-objective optimization algorithm, adjustments are made. Adjustable bolts for the corrugated plate spacing are provided on both sides of the corrugated plate dryer; the spacing is adjusted by rotating these bolts. Similarly, adjustable bolts are provided in the wire mesh separator; the thickness of the wire mesh separator is adjusted by rotating the nuts.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An external vapor-liquid separation system, characterized in that: The system includes a corrugated plate dryer (4) and a wire mesh separator (8). The bottom of the corrugated plate dryer (4) is connected to the injection pipe, and the top of the corrugated plate dryer (4) is connected to the inlet of the wire mesh separator (8) through a pipe. The outlet of the wire mesh separator (8) is connected to the exhaust channel. After the vapor-liquid mixture enters the corrugated plate dryer (4) through the injection pipe for preliminary vapor-liquid separation, it is further separated by the wire mesh separator (8) and finally discharged through the exhaust channel. Sampling devices are set at the inlet pipe, outlet pipe and exhaust channel of the corrugated plate dryer (4) to sample the vapor-liquid mixture and obtain condensate through the cooler. The vapor-liquid separation efficiency of the corrugated plate dryer (4) and the wire mesh separator (8) is calculated by measuring the conductivity of the condensate of the vapor-liquid mixture, and the corrugated plate dryer (4) and the wire mesh separator (8) are adjusted in real time to meet the preset conditions. The conductivity of the condensate of the vapor-liquid mixture sampled at the inlet pipe of the corrugated plate dryer (4) is [missing information]. The conductivity of the condensate of the vapor-liquid mixture sampled at the outlet pipe of the corrugated plate dryer (4) is... The conductivity of the condensate of the vapor-liquid mixture sampled at the exhaust channel is... ; Based on the conductivity of the pure liquid in the vapor-liquid mixture The vapor-liquid separation efficiency of the corrugated plate dryer (4) is... for: Separation efficiency of wire mesh separator (8) for: The corrugated plate dryer (4) is provided with a corrugated plate channel inside. The corrugated plate channel includes a central fixed corrugated plate and two outer corrugated plates on both sides. By adjusting the two outer corrugated plates, the distance d between the three sets of corrugated plates is changed, thereby adjusting the vapor-liquid separation efficiency of the corrugated plate dryer (4). ; in, The coefficient of the constant term, , , The coefficient of the linear term, , , The coefficients of the quadratic interaction term, , , These are the coefficients of the quadratic term. These coefficients can be obtained through pre-calibration experiments and calculated using a multi-objective optimization genetic algorithm; u in1 The flow rate of the vapor-liquid mixture at the inlet of the corrugated plate dryer (4) is obtained by measuring the velocity using a sensor. The humidity at the inlet of the corrugated plate dryer (4) is... ; The wire mesh separator (8) includes stacked wire mesh (28). The vapor-liquid separation efficiency of the wire mesh separator (8) is adjusted by adjusting the total thickness t of the wire mesh area. ; in, The coefficient of the constant term, , , coefficient of the first term, , , The coefficients of the quadratic interaction term, , , These are the coefficients of the quadratic term. These coefficients can be obtained through pre-calibration experiments and calculated using a multi-objective optimization genetic algorithm; u in2 The flow rate of the gas-liquid mixture at the inlet of the wire mesh separator (8) is obtained by measuring the velocity using a sensor. For the humidity at the inlet of the wire mesh separator (8), ; The wire mesh separator (8) has multiple sets. The top of the corrugated plate dryer (4) is connected to the inlet of each set of wire mesh separators (8) through a pipeline. The outlets of all wire mesh separators (8) are collected through pipelines and connected to the exhaust channel. Valves are installed on the inlet and outlet pipelines of each set of wire mesh separators (8). Multiple sets of wire mesh separators (8) work at the same time. If the gas-liquid separation efficiency of a certain set of wire mesh separators (8) is found to be substandard, the set of wire mesh separators (8) is stopped, the valves on its inlet and outlet pipelines are closed, and it is disassembled and replaced without affecting the overall operation of the external gas-liquid separation system.

2. The external vapor-liquid separation system according to claim 1, characterized in that: The sampling device includes a sampling pipe (15), one end of which extends into the pipeline containing the vapor-liquid mixture for sampling; outside the pipeline containing the vapor-liquid mixture, a differential pressure flow meter (17) and a valve (18) are installed on the sampling pipe (15), the opening of the valve (18) is controlled, and the flow rate G2 of the vapor-liquid mixture in the sampling pipe (15) is changed to ensure that the flow velocity v1 of the vapor-liquid mixture in the pipeline containing the vapor-liquid mixture during the sampling process is equal to the flow velocity v2 of the vapor-liquid mixture in the sampling pipe (15), i.e., v1=v2; v1=G1 / A1, v2=G2 / A2 Wherein, G1 is the flow rate of the vapor-liquid mixture at the end of the sampling pipe (15) in the pipeline containing the vapor-liquid mixture, which is obtained by the volumetric flow meter (7) in the pipeline containing the vapor-liquid mixture; the flow rate G2 of the vapor-liquid mixture in the sampling pipe (15) is obtained by the differential pressure flow meter (17) on the sampling pipe (15); A1 is the cross-sectional area of ​​the pipeline containing the vapor-liquid mixture; A2 is the cross-sectional area of ​​the sampling pipe (15).

3. An external vapor-liquid separation system according to claim 1, characterized in that: The central fixed waveform board and the two outer waveform boards on both sides all adopt a double-hook waveform board structure.

4. An external vapor-liquid separation system according to claim 1, characterized in that: The device for adjusting the spacing between the three sets of corrugated plates includes an adjustable bolt (19), a fixing nut (20), and a fixing washer (21). The two outer corrugated plates are moved by the adjustable bolt (19), the fixing nut (20) is fixed to the outside of the outer box, and the fixing washer (21) is arranged on the outside of the two outer corrugated plates to increase the contact area between the adjustable bolt (19) and the two outer corrugated plates.

5. An external vapor-liquid separation system according to claim 1, characterized in that: The corrugated plate dryer (4) is provided with an upper baffle (5) and a lower baffle (3) inside. A gas equalization plate (1) is provided on the left and right sides of the space between the upper baffle (5) and the lower baffle (3). A corrugated plate channel is arranged behind the gas equalization plate (1). A vapor-liquid mixture inlet is opened in the middle of the lower baffle (3). A vapor-liquid mixture outlet (23) is opened on the upper baffle (5) above the outlet of the corrugated plate channel. The vapor-liquid mixture enters the corrugated plate dryer (4) through the injection pipe. It enters the space between the upper baffle (5) and the lower baffle (3) from the vapor-liquid mixture inlet. The vapor-liquid mixture flows to both ends. First, it passes through the gas equalization plate (1) to make the vapor flow more evenly distributed in the space. Then, it undergoes preliminary vapor-liquid separation through the corrugated plate channel and flows out of the corrugated plate dryer (4) through the vapor-liquid mixture outlet (23).

6. An external vapor-liquid separation system according to claim 1, characterized in that: The device for adjusting the total thickness of the wire mesh area includes a nut (24), an adjusting bolt (25), a wire mesh top frame (26), and a wire mesh bottom frame (27). The wire mesh top frame (26) is fixed to the housing of the wire mesh separator (8) by a fixing rod (29). The wire mesh (28) is stacked between the wire mesh top frame (26) and the wire mesh bottom frame (27). The wire mesh bottom frame (27) is connected to the housing of the wire mesh separator (8) by the nut (24) and the adjusting bolt (25). By rotating the nut (24) to move the wire mesh bottom frame (27), the distance between the wire mesh top frame (26) and the wire mesh bottom frame (27) is adjusted, thereby adjusting the degree of compression of the wire mesh (28) and controlling the total thickness t of the wire mesh area.

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