External vapor-liquid separation system

Abstract

The invention belongs to the technical field of steam-water separation, and particularly relates to an external steam-liquid separation system. The sampling devices are arranged at the inlets and outlets of the corrugated plate dryer and the silk screen separator, so that the conductivity of the condensed water of the sampled vapor-liquid mixture is measured on line in real time, and the vapor-liquid separation efficiency of the corrugated plate dryer and the silk screen separator is monitored; and meanwhile, the distance between corrugated plates in the corrugated plate dryer and the thickness of a silk screen area in the silk screen separator are adjusted in real time, so that the external vapor-liquid separation system provided by the invention can still meet actual requirements through online adjustment even if a local fault occurs, and the overall operation of the device is not influenced. According to the external vapor-liquid separation system provided by the invention, a plurality of groups of screen mesh separators can be reserved, different vapor-liquid separation efficiency requirements are met, and when a certain group of screen mesh separators fail, the screen mesh separators can be disassembled and replaced on the premise of not influencing the operation of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of gas-water separation, and in particular relates to an external gas-liquid separation system. Background Art

[0002] Steam is widely used as a heat carrier in industrial production, especially in the power generation industry. During the steam transportation process, if the steam is not dehumidified, too much water in the steam will cause corrosion and damage to the equipment. Therefore, the wet steam must be dehumidified to control the steam humidity within a reasonable range. At present, the most common way to dehumidify water vapor is to install a steam-water separator.

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

[0004] The existing devices have weak corrosion resistance and are difficult to disassemble and replace. They do 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 operating conditions. The total amount of water vapor separated and the separation efficiency cannot be taken into account at the same time. Summary of the invention

[0005] The purpose of the present invention is to provide an external vapor-liquid separation system to address the problems of the vapor-water separation device having low corrosion resistance, being difficult to disassemble and replace, being unable to measure the steam humidity online in real time and optimize the structure of the separation device according to the real-time working conditions, and being unable to take into account both the total amount of water vapor separation and the separation efficiency.

[0006] An external vapor-liquid separation system comprises a corrugated plate dryer and a wire mesh separator; the bottom of the corrugated plate dryer is connected to an incident pipeline, the top of the corrugated plate dryer is connected to an inlet of the wire mesh separator through a pipeline, and the outlet of the wire mesh separator is connected to an exhaust channel; a vapor-liquid mixture enters the corrugated plate dryer through the incident pipeline for preliminary vapor-liquid separation, and then passes through a wire mesh separator for further vapor-liquid separation, and is finally discharged through an exhaust channel; a sampling device is provided at the inlet pipeline of the corrugated plate dryer, the outlet pipeline of the corrugated plate dryer and the exhaust channel for sampling the vapor-liquid mixture, and condensed water is obtained through a cooler; the vapor-liquid separation efficiency of the corrugated plate dryer and the wire mesh separator is calculated by measuring the conductivity of the condensed water of the vapor-liquid mixture, and the corrugated plate dryer and the wire mesh separator are adjusted in real time to meet preset conditions.

[0007] Furthermore, the sampling device comprises a sampling pipeline, one end of which extends into the pipeline where the vapor-liquid mixture is located for sampling; a differential pressure flowmeter and a valve are arranged on the sampling pipeline outside the pipeline where the vapor-liquid mixture is located, and the opening of the valve is controlled to change the flow rate G2 of the vapor-liquid mixture in the sampling pipeline, so as to ensure that the flow rate v1 of the vapor-liquid mixture in the pipeline where the vapor-liquid mixture is located is equal to the flow rate v2 of the vapor-liquid mixture in the sampling pipeline during the sampling process, that is, v1=v2;

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

[0009] Among them, G1 is the flow rate of the vapor-liquid mixture at the end of the sampling pipe in the pipeline where the vapor-liquid mixture is located, which is obtained by the volume flowmeter on the pipeline where the vapor-liquid mixture is located; the flow rate G2 of the vapor-liquid mixture in the sampling pipe is obtained by the differential pressure flowmeter on the sampling pipe; A1 is the pipe cross-sectional area of ​​the pipeline where the vapor-liquid mixture is located; A2 is the cross-sectional area of ​​the sampling pipe.

[0010] Furthermore, the conductivity of the condensed water of the vapor-liquid mixture sampled at the inlet pipeline of the corrugated plate dryer is The conductivity of the condensed water of the vapor-liquid mixture sampled at the outlet pipeline of the corrugated plate dryer is The conductivity of the condensed water of the vapor-liquid mixture sampled at the exhaust passage is ;

[0011] According to the conductivity of pure liquid in vapor-liquid mixture , then the vapor-liquid separation efficiency of the corrugated plate dryer is for:

[0012]

[0013] Separation efficiency of wire mesh separator for:

[0014] .

[0015] Furthermore, a corrugated plate channel is provided inside the corrugated plate dryer, and the corrugated plate channel includes a central fixed corrugated plate and two peripheral corrugated plates. By adjusting the two peripheral corrugated plates, the spacing d between the three groups of corrugated plates is changed, and the vapor-liquid separation efficiency of the corrugated plate dryer is adjusted. ;

[0016]

[0017] in, is the constant term coefficient, , , is the coefficient of the first-order term, , , is the quadratic interaction coefficient, , , is the quadratic term coefficient, which can be obtained through pre-calibration test and multi-objective optimization genetic algorithm calculation; u in1 is the flow rate of the vapor-liquid mixture at the inlet of the corrugated plate dryer, which is measured by a sensor; is the humidity at the inlet of the corrugated plate dryer, .

[0018] Furthermore, the central fixed corrugated plate and the peripheral corrugated plates on both sides adopt a double-hook corrugated plate structure.

[0019] Furthermore, the device for adjusting the spacing between the three groups of corrugated plates includes an adjustable bolt, a fixing nut and a fixing gasket; the outer corrugated plates on both sides are moved by the adjustable bolts, the fixing nuts are fixed to the outside of the outer box body, and the fixing gaskets are arranged on the outside of the outer corrugated plates on both sides, so as to increase the contact area between the adjustable bolts and the outer corrugated plates on both sides.

[0020] Furthermore, an upper baffle and a lower baffle are provided inside the corrugated plate dryer, and uniform air holes are provided on the left and right sides of the space between the upper baffle and the lower baffle, a corrugated plate channel is arranged behind the uniform air holes, a vapor-liquid mixture inlet is opened in the middle of the lower baffle, and a vapor-liquid mixture outlet 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 the incident pipeline, and enters the space between the upper baffle and the lower baffle from the vapor-liquid mixture inlet, and the vapor-liquid mixture flows to both ends, first passes through the uniform air holes to make the vapor flow more evenly distributed in the space, and then passes through the corrugated plate channel for preliminary vapor-liquid separation, and then 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 adjusting the total thickness t of the wire mesh area. ;

[0022]

[0023] in, is the constant term coefficient, , , The coefficient of the first term, , , is the quadratic interaction coefficient, , , is the quadratic term coefficient, which can be obtained through pre-calibration test and multi-objective optimization genetic algorithm calculation; u in2is the flow rate of the vapor-liquid mixture at the inlet of the wire mesh separator, which is measured by a sensor; is the 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 wire mesh top frame and a wire mesh bottom frame; the wire mesh top frame is fixed in the box of the wire mesh separator through a fixing rod; the wire mesh is stacked between the wire mesh top frame and the wire mesh bottom frame; the wire mesh bottom frame is connected to the box of the wire mesh separator through a nut and an adjusting bolt; the wire mesh bottom frame is moved by rotating the nut, the distance between the wire mesh top frame and the wire mesh bottom frame is adjusted, and then the compression degree of the wire mesh is adjusted, thereby controlling the total thickness t of the wire mesh area.

[0025] Furthermore, there are multiple groups of wire mesh separators, and the top of the corrugated plate dryer is connected to the inlet of each group of wire mesh separators through pipelines, and the outlets of all wire mesh separators are collected through pipelines and connected to the exhaust channel, and valves are respectively arranged on the inlet and outlet pipelines of each group of wire mesh separators; multiple groups of wire mesh separators work simultaneously, and if it is detected that the vapor-liquid separation efficiency of a certain group of wire mesh separators does not meet the standard, the group of wire mesh separators is disabled, and the valves on its inlet and outlet pipelines are closed, and the external vapor-liquid separation system is disassembled and replaced without affecting the overall operation of the external vapor-liquid separation system.

[0026] The beneficial effects of the present invention are:

[0027] The present invention arranges sampling devices at the inlet and outlet of the corrugated plate dryer and the wire mesh separator to measure the conductivity of the sampled condensed water of the vapor-liquid mixture in real time online, monitor the vapor-liquid separation efficiency of the corrugated plate dryer and the wire mesh separator, and at the same time, adjusts 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, so that even when a local failure occurs, the external vapor-liquid separation system provided by the present invention can still meet the actual requirements through online adjustment without affecting the overall operation of the device. The external vapor-liquid separation system provided by the present invention can spare multiple groups of wire mesh separators to meet different vapor-liquid separation efficiency requirements, and when a group of wire mesh separators fails, they can be disassembled and replaced without affecting the operation of the device. The present invention adopts a combination of a corrugated plate dryer and a wire mesh separator, taking into account the total amount and separation efficiency of the vapor-liquid mixture, ensuring the continuous and stable operation of the system while also improving the total amount and quality of vapor-liquid separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a schematic diagram of the arrangement of an external vapor-liquid separation system in the present invention.

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

[0030] Figure 3 It is a structural schematic diagram of the corrugated plate dryer in the present invention.

[0031] Figure 4 It is a schematic diagram of the structure of the wire mesh separator in the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] like Figure 1 As shown, the present invention provides an external vapor-liquid separation system, including an air-distributing orifice plate 1, a double-hook corrugated plate 2, a lower baffle 3, a corrugated plate dryer 4, an upper baffle 5, a waste water tank 6, a volume flow meter 7, a wire mesh separator 8, a wire mesh separator box 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 following table:

[0034]

[0035] The bottom of the corrugated plate dryer 4 is connected to the incident pipeline, the top of the corrugated plate dryer 4 is connected to the inlet of the wire mesh separator 8 through the pipeline, and 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 incident pipeline for preliminary vapor-liquid separation, and then passes through the wire mesh separator 8 for further vapor-liquid separation, and finally is discharged through the exhaust channel.

[0036] According to the actual working conditions, open valve VA1 or VA5, the vapor-liquid mixture enters the wire mesh separator through the pipeline, and after further separation by the wire mesh separator, flows to the next level 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. At the same time, valves VA7, VA8, and VA9 are adjusted. A sampling device is set at the inlet pipeline of the corrugated plate dryer 4, the outlet pipeline of the corrugated plate dryer 4, and the exhaust channel. The sampling device samples three positions, opens the cooling water pipeline valve VA10, 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 condensed water is collected by using a sampling bottle 11, and the conductivity of the condensed water is measured by 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 where the vapor-liquid mixture is located for sampling; outside the pipeline where the vapor-liquid mixture is located, a differential pressure flowmeter 17 and a valve 18 are arranged on the sampling pipe 15. The vapor-liquid mixture entering the sampling pipe 15 is liquefied under the action of the cooler 12, and the condensed water is collected by the sampling bottle 11. The sampling method adopts a probe sampling method. In order to reduce the interference of the sampling pipe on the airflow, the inlet of the sampling pipe is designed to be an acute angle, and at the same time, the sampling port is facing the steam for sampling.

[0038] In order to ensure the accuracy of sampling, constant speed sampling must be adopted. The flow rate G1 (m 3 / h), the steam velocity v1 (m / h) at the sampling point in the pipeline where the vapor-liquid mixture is located is calculated according to the following formula:

[0039] v1=G1 / A1

[0040] Where A1 is the cross-sectional area of ​​the pipeline where the gas-liquid mixture is located, m 2 ;

[0041] The flow rate G2 (m2) of the vapor-liquid mixture in the sampling pipeline 15 is measured by the differential pressure flowmeter 17 on the sampling pipeline 15. 3 / h), and then the flow rate v2 (m / h) of the vapor-liquid mixture in the sampling pipe 15 is calculated according to the following formula:

[0042] v2=G2 / A2

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

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

[0045] Separation efficiency is an important indicator to measure the separation performance of the separation device and determines the quality of the steam at the device outlet. The present invention uses the conductivity method to measure the inlet and outlet humidity of the separation device, and then calculates its separation efficiency based on the humidity. The conductivity method is based on the fact that when the steam pressure is lower than 6MPa, salt only dissolves in water but not in water vapor; therefore, the salt content in the condensed water 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 is the mass flow rate of mixed steam, kg / h; G w is the amount of steam condensate sampled, kg / h; S in is the salt concentration in the sampled steam, %; S w is the salt concentration of the sampled steam condensate, %;

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

[0050] ,

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

[0052] According to the above calculation of inlet and outlet humidity, the separation efficiency of the separation device is:

[0053]

[0054] Based on the above, the conductivity of the condensed water of the vapor-liquid mixture sampled at the inlet pipeline of the corrugated plate dryer 4 in the present invention is The conductivity of the condensed water of the vapor-liquid mixture sampled at the outlet pipe of the corrugated plate dryer 4 is The conductivity of the condensed water of the vapor-liquid mixture sampled at the exhaust passage is ;

[0055] According to the conductivity of pure liquid in vapor-liquid mixture , then the vapor-liquid separation efficiency of the corrugated plate dryer 4 is for:

[0056]

[0057] Separation efficiency of wire mesh separator 8 for:

[0058] .

[0059] like Figure 1 and Figure 3 As shown, an upper baffle 5 and a lower baffle 3 are provided inside the corrugated plate dryer 4, and an air-distributing orifice 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 air-distributing orifice plate 1, a vapor-liquid mixture inlet is provided in the middle of the lower baffle 3, and a vapor-liquid mixture outlet 23 is provided on the upper baffle 5 above the outlet of the corrugated plate channel; the vapor-liquid mixture enters the interior of the corrugated plate dryer 4 through the incident pipeline, and enters the space between the upper baffle 5 and the lower baffle 3 from the vapor-liquid mixture inlet, and the vapor-liquid mixture flows to both ends, first passes through the air-distributing orifice plate 1 to make the vapor flow more evenly distributed in the space, and then passes through the corrugated plate channel for preliminary vapor-liquid separation, and then flows out of the corrugated plate dryer 4 through the vapor-liquid mixture outlet 23. Among them, the central fixed corrugated plate and the outer corrugated plates on both sides adopt a double-hook corrugated plate structure. The device for adjusting the spacing between the three groups of corrugated plates includes an adjustable bolt 19, a fixing nut 20 and a fixing gasket 21; the outer corrugated plates on both sides are moved by the adjustable bolt 19, the fixing nut 20 is fixed to the outside of the outer box body, and the fixing gasket 21 is arranged on the outside of the outer corrugated plates on both sides, so as to increase the contact area between the adjustable bolt 19 and the outer corrugated plates on both sides.

[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 wire mesh top frame 26, a wire mesh bottom frame 27 and a fixing rod 29; the wire mesh top frame 26 is fixed to the surface of the box of the wire mesh separator 8, and the fixing rod 29 fixes the distance between the right surface of the box of the wire mesh separator 8 and the wire mesh top frame 26; the wire mesh 28 is stacked between the wire mesh top frame 26 and the wire mesh bottom frame 27, and the wire mesh 28 can be made of titanium alloy, and the surface is coated with a ceramic coating to enhance the corrosion resistance of the wire mesh separator. The wire mesh bottom frame 27 is connected to the box of the wire mesh separator 8 through the nut 24 and the adjusting bolt 25; the wire mesh bottom frame 27 is moved by rotating the nut 24 to adjust the distance between the wire mesh top frame 26 and the wire mesh bottom frame 27, and then the compression degree of the wire mesh 28 is adjusted, thereby controlling the total thickness t of the wire mesh area.

[0061] like Figure 1 As shown, the wire mesh separator 8 may have multiple groups ( Figure 1Two groups are drawn in the figure), the top of the corrugated plate dryer 4 is connected to the inlet of each group 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, and valves are respectively arranged on the inlet and outlet pipelines of each group of wire mesh separators 8; when the separation capacity of one group of wire mesh separators is insufficient, multiple groups of wire mesh separators can be opened at the same time for separation, and the multiple groups of wire mesh separators 8 work at the same time to increase the overall vapor-liquid separation efficiency of the external vapor-liquid separation system; if it is detected that the vapor-liquid separation efficiency of a certain group of wire mesh separators 8 is not up to standard, the group of wire mesh separators 8 is disabled, the valves on its inlet and outlet pipelines are closed, and it is disassembled and replaced without affecting the overall operation of the external vapor-liquid separation system.

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

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

[0064] Based on the existing experimental data and actual application scenarios, the corrugated plate dryer selects three variable parameters, namely inlet velocity, inlet humidity, and corrugated plate spacing, as design variables. The wire mesh separator selects three parameters, namely air flow velocity, separator thickness, and inlet humidity, as design parameters. The separation efficiency of the separation device is taken as the optimization target.

[0065] (2) Use orthogonal experimental design method to select experimental data points;

[0066] According to the number of variables and classification, the corresponding orthogonal table is found, and the corresponding representative experimental data points are selected according to the arrangement in the table to form the final experimental grouping, so as to achieve the equivalent results of 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 the experiment according to the experimental grouping after the orthogonal experimental design, the response surface method is used to fit the relationship between the factors and the corresponding response values. In the present invention, the quadratic regression equation, that is, the second-order polynomial, is used to approximate the true functional relationship. Its theoretical formula can be written as:

[0069]

[0070] Among them, Y is the optimization target, X is the set of design variables, and x i is the i-th design variable, x j is the jth design variable, , , , are the coefficients of the constant term, the linear term, the quadratic term, and the second-order interaction term, respectively. For error.

[0071] Based on the above process, the data of orthogonal experimental design are analyzed by response surface method, and finally the fitting polynomial is obtained. At the same time, after fitting, the fitting model is tested. If the model has good adaptability, the optimal response value can be obtained.

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

[0073] The present invention adopts an improved non-dominated sorting genetic algorithm (NSGA-Ⅱ algorithm) to perform parameter optimization of the corrugated plate dryer. The main reason is that it reduces the complexity of calculation, has the characteristics of fast calculation speed, good solution set convergence and more accurate calculation results. The NSGA-Ⅱ algorithm has gradually become the standard for verifying the performance of other multi-objective optimization algorithms. The NSGA algorithm is an efficient multi-objective optimization genetic algorithm based on non-dominated sorting. Its efficiency is because the fitting relationship between the design variables and the optimization objectives can be directly used as the fitness function for subsequent operations, avoiding the tedious process of fitness value allocation. The NSGA algorithm is not valued due to its complex calculation, the inability to retain the excellent individuals of the parent generation, and the need to preset shared parameters. The improved NSGA algorithm, namely the NSGA-Ⅱ algorithm, has a better sorting algorithm, adopts the elite method, and does not need to set shared parameters in advance.

[0074] (5) Complete the specified number of evolutionary iterations to obtain the final set of multi-objective optimization solutions.

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

[0076]

[0077] in, is the constant term coefficient, , , is the coefficient of the first-order term, , , is the quadratic interaction coefficient, , , is the quadratic term coefficient, which can be obtained through pre-calibration test and multi-objective optimization genetic algorithm calculation; u in1 is the flow rate of the vapor-liquid mixture at the inlet of the corrugated plate dryer 4, m / s, obtained by measuring with a sensor; is the humidity at the inlet of corrugated plate dryer 4, % ; d is the distance between the corrugated plates, mm.

[0078] Gas-liquid separation efficiency of screen separator 8 The relationship between and design parameters is:

[0079]

[0080] in, is the constant term coefficient, , , The coefficient of the first term, , , is the quadratic interaction coefficient, , is the quadratic term coefficient, which can be obtained through pre-calibration test and multi-objective optimization genetic algorithm calculation; u in2 is the flow rate of the vapor-liquid mixture at the inlet of the wire mesh separator 8, m / s, measured by a sensor; is the humidity at the inlet of wire mesh separator 8, % ; t is the thickness of the screen, mm.

[0081] The optimal plate spacing of the corrugated plate dryer and the optimal thickness of the wire mesh separator are adjusted according to the multi-objective optimization algorithm. Bolts for adjusting the spacing of the corrugated plates are provided on both sides of the corrugated plate dryer. The spacing of the corrugated plates of the corrugated plate dryer is adjusted by turning the bolts. The wire mesh separator is also provided with an adjustable bolt. By turning the nut, the thickness of the wire mesh separator is adjusted, and then the thickness of the wire mesh separator is adjusted.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An external vapor-liquid separation system, characterized in that: The invention comprises a corrugated plate dryer (4) and a wire mesh separator (8); the bottom of the corrugated plate dryer (4) is connected to an incident pipeline, the top of the corrugated plate dryer (4) is connected to an inlet of the wire mesh separator (8) through a pipeline, and the outlet of the wire mesh separator (8) is connected to an exhaust passage; the vapor-liquid mixture enters the corrugated plate dryer (4) through the incident pipeline for preliminary vapor-liquid separation, then passes through the wire mesh separator (8) for further vapor-liquid separation, and finally is discharged through the exhaust passage; a sampling device is provided at the inlet pipeline of the corrugated plate dryer (4), the outlet pipeline of the corrugated plate dryer (4) and the exhaust passage, for sampling the vapor-liquid mixture, and obtaining condensed water through a 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 condensed water of the vapor-liquid mixture, and the corrugated plate dryer (4) and the wire mesh separator (8) are adjusted in real time to meet preset conditions.

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

3. The external vapor-liquid separation system according to claim 1, characterized in that: The conductivity of the condensed water of the vapor-liquid mixture sampled at the inlet pipeline of the corrugated plate dryer (4) is The electrical conductivity of the condensed water of the vapor-liquid mixture sampled at the outlet pipeline of the corrugated plate dryer (4) is The conductivity of the condensed water of the vapor-liquid mixture sampled at the exhaust passage is ; According to the conductivity of pure liquid in vapor-liquid mixture , then the vapor-liquid separation efficiency of the corrugated plate dryer (4) is for: Separation efficiency of wire mesh separator (8) for: 。 4. The external vapor-liquid separation system according to claim 3, characterized in that: The corrugated plate dryer (4) is provided with a corrugated plate channel inside, the corrugated plate channel comprising a central fixed corrugated plate and peripheral corrugated plates on both sides. By adjusting the peripheral corrugated plates on both sides to change the spacing d between the three groups of corrugated plates, the vapor-liquid separation efficiency of the corrugated plate dryer (4) is adjusted. ; in, is the constant term coefficient, , , is the coefficient of the first-order term, , , is the quadratic interaction coefficient, , , is the quadratic term coefficient, which can be obtained through pre-calibration test and multi-objective optimization genetic algorithm calculation; u in1 is the flow rate of the vapor-liquid mixture at the inlet of the corrugated plate dryer (4), measured by a sensor; is the humidity at the inlet of the corrugated plate dryer (4), .

5. The external vapor-liquid separation system according to claim 4, characterized in that: The central fixed corrugated plate and the peripheral corrugated plates on both sides adopt a double-hook corrugated plate structure.

6. The external vapor-liquid separation system according to claim 4, characterized in that: The device for adjusting the spacing between the three groups of corrugated plates comprises an adjustable bolt (19), a fixing nut (20) and a fixing gasket (21); the outer corrugated plates on both sides are moved by means of the adjustable bolt (19), the fixing nut (20) is fixed to the outside of the outer box body, and the fixing gasket (21) is arranged outside the outer corrugated plates on both sides, and is used to increase the contact area between the adjustable bolt (19) and the outer corrugated plates on both sides.

7. The 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, and an air-distributing orifice 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 air-distributing orifice plate (1), a vapor-liquid mixture inlet is provided in the middle of the lower baffle (3), and a vapor-liquid mixture outlet (23) is provided 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 incident pipeline, and enters the space between the upper baffle (5) and the lower baffle (3) from the vapor-liquid mixture inlet, and the vapor-liquid mixture flows to both ends, first passes through the air-distributing orifice plate (1) to make the vapor flow more evenly distributed in the space, and then passes through the corrugated plate channel for preliminary vapor-liquid separation, and then flows out of the corrugated plate dryer (4) through the vapor-liquid mixture outlet (23).

8. The external vapor-liquid separation system according to claim 1, characterized in that: The wire mesh separator (8) comprises stacked wire meshes (28), and 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, is the constant term coefficient, , , The coefficient of the first term, , , is the quadratic interaction coefficient, , , is the quadratic term coefficient, which can be obtained through pre-calibration test and multi-objective optimization genetic algorithm calculation; u in2 is the flow rate of the vapor-liquid mixture at the inlet of the wire mesh separator (8), measured by a sensor; is the humidity at the inlet of the wire mesh separator (8), .

9. The external vapor-liquid separation system according to claim 8, characterized in that: The device for adjusting the total thickness of the wire mesh area comprises 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 in the housing of the wire mesh separator (8) via 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) via a nut (24) and an adjusting bolt (25); the wire mesh bottom frame (27) is moved by rotating the nut (24), thereby adjusting the distance between the wire mesh top frame (26) and the wire mesh bottom frame (27), and further adjusting the compression degree of the wire mesh (28), thereby controlling the total thickness t of the wire mesh area.

10. The external vapor-liquid separation system according to claim 1, characterized in that: There are multiple groups of wire mesh separators (8), the top of the corrugated plate dryer (4) is connected to the inlet of each group of wire mesh separators (8) through a pipeline, the outlets of all wire mesh separators (8) are collected through a pipeline and connected to the exhaust channel, and valves are respectively arranged on the inlet and outlet pipelines of each group of wire mesh separators (8); the multiple groups of wire mesh separators (8) work simultaneously, if it is detected that the vapor-liquid separation efficiency of a group of wire mesh separators (8) does not meet the standard, the group 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 vapor-liquid separation system.

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