Indoor simulation test and detection device for inlet air desalting technology of gas turbine

Abstract

The utility model relates to the technical field of gas turbines, in particular to a gas turbine inlet air desalting technology indoor simulation test and detection device which comprises an air duct, a wet film air-water separator, a saline water spray nozzle, a high-pressure water feeding pump, a saline water tank, a water drainage pipe, an electric heating controller and a high-efficiency filter. The device not only can simulate desalting technologies and design parameters of various kinds of salt-containing air, but also can accurately measure the salt content of air less than 0.0015 ppm; the experiment mode proves that the highest level of inlet gas desalting of the gas turbine in the industry at present can be achieved by using the technology of efficient gas-water / separation, inlet gas heating and efficient filtering, and technical support is provided for engineering design.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbines, in particular to an indoor simulation test and detection device for gas turbine intake air desalination technology. Background Art

[0002] The power plants of most military ships are gas turbines; there are also many users who use gas turbines on offshore platforms, coastal areas, saline-alkali lands, and chemical plants; gas turbines use air as the working medium. As we all know, the air at sea level, offshore platforms, coastal areas, saline-alkali lands, and chemical plants generally contains varying amounts of various salts such as potassium, sodium, and vanadium, some of which are as high as 50 ppm or more; gas turbine fuel generally contains sulfur or hydrogen sulfide, some of which are as high as around 300 ppm.

[0003] All high-temperature components of gas turbines are extremely sensitive to salt corrosion and do not allow both salt and sulfur to enter the turbine simultaneously. This is because salt in the air and sulfur in the fuel form sulfates during combustion. Sulfates adhere to the high-temperature components of the gas turbine, causing severe salt corrosion, significantly shortening the operating life of the gas turbine. Therefore, many relevant technical standards stipulate that the salt content of K+Na+V in the inlet air of gas turbines operating on land must be less than 0.0015ppm.

[0004] Since salt is highly soluble in water, traditional designs use the method of "removing water and removing salt". However, the effect of any mechanical gas-water separation is limited. Although it has gradually developed into a 2-3 or even 4-stage trough guide vane + condensing mechanical gas-water separator, the more stages there are, the greater the air intake loss. Currently, the salt content of the intake air of ship gas turbines can generally only reach K+Na+V < 0.01ppm. Therefore, the operating life of gas turbines used on ships or in areas with high salt content is less than half of that used on land. Utility Model Content

[0005] The purpose of the utility model is to provide an indoor simulation test and detection device for gas turbine intake desalination technology, which solves the problem in the prior art that salt is extremely soluble in water and the traditional design adopts the method of "dewatering and desalting". However, the effect of any mechanical gas-water separation is limited. Although it has gradually developed into a 2-3 or even 4-stage trough guide vane + condensation-type mechanical gas-water separator, the more stages there are, the greater the intake loss. At present, the salt content of the intake air of a ship gas turbine can generally only achieve K+Na+V<0.01ppm. Therefore, the operating life of a gas turbine used on ships or in areas with high salt content is less than half of that used on land.

[0006] To achieve the above-mentioned objectives, the utility model provides an indoor simulation test and detection device for gas turbine intake air desalination technology, comprising an air duct, a wet film air-water separator, a salt water spray nozzle, a high-pressure water feed pump, a salt water tank, a drain pipe, an electric heater and controller, and a high-efficiency filter; the wet film air-water separator is arranged inside the air duct, the salt water tank is placed outside the air duct, one end of the high-pressure water feed pump is fixedly connected to the salt water tank, the other end of the high-pressure water feed pump passes through the air duct and is fixedly connected to the salt water spray nozzle, and the salt water spray nozzle is located on the left side of the wet film air-water separator, the drain pipe is connected to the air duct and is located on the right side of the wet film air-water separator, the electric heater and controller is fixedly connected to the air duct and is located on the right side of the drain pipe, and the high-efficiency filter is arranged inside the air duct and is located on the right side of the electric heater and controller.

[0007] Among them, the indoor simulation test and detection device for gas turbine intake air desalination technology also includes an axial flow draft fan, an atmospheric temperature and humidity sensor and a differential pressure gauge. The axial flow draft fan is arranged inside the air duct and is located on the right side of the high-efficiency filter. The atmospheric temperature and humidity sensor is arranged on the left side of the air duct. The differential pressure gauge is fixedly connected to the air duct and is located at the upper end of the air duct.

[0008] Among them, the indoor simulation test and detection device for gas turbine intake air desalination technology also includes a heated air temperature and humidity sensor, which is fixedly connected to the air duct and located at the upper end of the air duct, and the output end of the heated air temperature and humidity sensor is arranged inside the air duct.

[0009] Among them, the indoor simulation test and detection device for gas turbine intake air desalination technology also includes a clean water tank and a quantitative air extraction pump. The clean water tank is placed outside the air duct, one end of the quantitative air extraction pump is fixedly connected to the clean water tank, and the other end of the quantitative air extraction pump is fixedly connected to the air duct.

[0010] The utility model discloses an indoor simulation test and detection device for gas turbine intake air desalination technology. The device comprises a high-pressure feedwater pump, which pressurizes brine in a brine tank and sprays the brine toward the air duct through a brine spray nozzle. The brine spray nozzle is installed before a wet-film air-water separator and sprays the brine toward the air duct through the brine spray nozzle. The wet-film air-water separator separates approximately 95% of the salt-containing liquid water in the air and discharges the salt-containing liquid water from the air through the drain pipe. The electric heater and controller heat the salt-containing humid air to a relative humidity of 50-70% RH. NaCl molecules in the air crystallize into NaCl grains larger than 0.1 μm, and approximately 99.5% of them are filtered out by the high-efficiency filter, thereby achieving efficient desalination. The device can not only simulate various desalination technologies and design parameters for salt-containing air, but also accurately measure the salt content in the air to less than 0.0015 ppm (parts per billion). The device not only experimentally proves that the combination of high-efficiency air-water separation, intake air heating, and high-efficiency filtration can achieve the highest level of gas turbine intake air desalination in the industry, but also provides technical support for engineering design. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] 1- air duct, 2- wet film air-water separator, 3- salt water spray nozzle, 4- high pressure water pump, 5- salt water tank, 6- drain pipe, 7- electric heater and controller, 8- high efficiency filter, 9- clean water tank, 10- quantitative air pump, 11- axial flow induced draft fan, 12- atmospheric temperature and humidity sensor, 13- heated air temperature and humidity sensor, 14- differential pressure gauge. DETAILED DESCRIPTION

[0014] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0015] See also Figure 1 ,in, Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] The utility model provides an indoor simulation test and detection device for gas turbine intake air desalination technology, comprising an air duct 1, a wet film air-water separator 2, a salt water spray nozzle 3, a high-pressure water supply pump 4, a salt water tank 5, a drain pipe 6, an electric heater and controller 7 and a high-efficiency filter 8; the wet film air-water separator 2 is arranged inside the air duct 1, the salt water tank 5 is placed outside the air duct 1, one end of the high-pressure water supply pump 4 is fixedly connected to the salt water tank 5, the other end of the high-pressure water supply pump 4 passes through the air duct 1 and is fixedly connected to the salt water spray nozzle 3, and the salt water spray nozzle 3 is located on the left side of the wet film air-water separator 2, the drain pipe 6 is communicated with the air duct 1 and is located on the right side of the wet film air-water separator 2, the electric heater and controller 7 is fixedly connected to the air duct 1 and is located on the right side of the drain pipe 6, and the high-efficiency filter 8 is arranged inside the air duct 1 and is located on the right side of the electric heater and controller 7.

[0017] In this embodiment, the high-pressure water pump 4 pressurizes the brine in the brine tank 5 and sprays it toward the air duct 1 through the brine spray nozzle 3. The brine spray nozzle 3 is installed before the wet film air-water separator 2, and sprays the brine toward the air duct 1 through the brine spray nozzle 3; the wet film air-water separator 2 separates about 95% of the salt-containing liquid water in the air and discharges it from the air duct 1 through the drain pipe 6; the electric heater and controller 7 heats the wet air containing salt to 50-70% RH; the NaCI molecules in the air crystallize into NaCI grains larger than 0.1 μm, and pass through the high-efficiency Approximately 99.5% of the salt is filtered out by the filter 8, achieving the purpose of efficient desalination. The device can not only simulate the desalination technology and design parameters of various salt-containing air, but also accurately measure the salt content in the air to less than 0.0015 parts per billion. It not only proves through experimental methods that the technology of high-efficiency gas-water separation + intake heating + high-efficiency filtration can achieve the highest level of gas turbine intake desalination in the industry, but also provides technical support for engineering design. The wet membrane gas-water separator 2 separates approximately 95% of the salt-containing liquid water in the air and discharges it into the air duct 1 through the drain pipe 6, achieving the purpose of primary desalination.

[0018] Furthermore, the indoor simulation test and detection device for the gas turbine intake air desalination technology also includes an axial flow draft fan 11, an atmospheric temperature and humidity sensor 12 and a differential pressure gauge 14. The axial flow draft fan 11 is arranged inside the air duct 1 and is located on the right side of the high-efficiency filter 8. The atmospheric temperature and humidity sensor 12 is arranged on the left side of the air duct 1. The differential pressure gauge 14 is fixedly connected to the air duct 1 and is located at the upper end of the air duct 1.

[0019] In this embodiment, a certain amount of NaCl is dissolved in the brine tank 5 of a known volume V1. The amount of NaCl added is calculated using the flow characteristic table of the axial flow induced draft fan 11, the indoor temperature / humidity measured by the atmospheric temperature and humidity sensor 12, the pressure difference before the axial flow induced draft fan 11 measured by the differential pressure gauge 14, and the start-up and pumping time. The amount of Na ions sprayed into the air duct 1 is also calculated to control the Na ion content between 1 and 50 ppm to simulate various working conditions.

[0020] Furthermore, the indoor simulation test and detection device for the gas turbine intake air desalination technology also includes a heated air temperature and humidity sensor 13, which is fixedly connected to the air duct 1 and located at the upper end of the air duct 1, and the output end of the heated air temperature and humidity sensor 13 is arranged inside the air duct 1.

[0021] In this embodiment, the air in the air duct 1 is heated by the electric heater and controller 7, and the heated air temperature and humidity sensor 13 measures the relative humidity of the air in the air duct 1. Maintaining a constant value between 50% and 70% RH, the NaCl in the air duct 1 forms crystals larger than 0.1 μm, and 99.5% of them are filtered out by the high-efficiency filters 8 described in E11 and E12, achieving the purpose of secondary desalination.

[0022] Furthermore, the indoor simulation test and detection device for the gas turbine intake air desalination technology also includes a clean water tank 9 and a quantitative air pump 10. The clean water tank 9 is placed outside the air duct 1, and one end of the quantitative air pump 10 is fixedly connected to the clean water tank 9, and the other end of the quantitative air pump 10 is fixedly connected to the air duct 1.

[0023] In this embodiment, air with extremely low salt content is extracted by the quantitative air pump 10 and injected into the clean water tank 9, and trace NaCI crystals are absorbed by the clean water and dissolved in the clean water; and the clean air after desalination is injected into the clean water tank 9 of known volume V2 by the quantitative air pump 10, and the trace NaCI contained in the clean air will dissolve in the clean water in the clean water tank 9. The NaCI concentration in the clean water tank 9 can be measured by a variety of chemical methods. Since the flow rate Q of the quantitative air pump 10, the extraction time T and the weight of the clean water in the clean water tank 9 are known, the Na content in the air entering the combustion engine after purification simulation device is calculated; and by spraying different concentrations of NaCI salt water, the salt content in the air is obtained from 1 to 50 ppm to simulate various working conditions; and the relative humidity of the air in the air duct 1 is obtained by the electric heater and controller 7. Maintaining 50-70% RH, or adjusting the accuracy of the high-efficiency filter 8E11 or E12, ultimately making the air salt content less than 0.0015ppm, provides technical support for engineering design.

[0024] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. An indoor simulation test and detection device for gas turbine inlet air desalination technology, characterized in that: Including air duct, wet film air-water separator, salt water spray nozzle, high pressure water pump, salt water tank, drain pipe, electric heater and controller and high efficiency filter; The wet film air-water separator is arranged inside the air duct, the brine tank is placed outside the air duct, one end of the high-pressure water supply pump is fixedly connected to the brine tank, the other end of the high-pressure water supply pump passes through the air duct and is fixedly connected to the brine spray nozzle, and the brine spray nozzle is located on the left side of the wet film air-water separator, the drain pipe is connected to the air duct and is located on the right side of the wet film air-water separator, the electric heater and controller are fixedly connected to the air duct and are located on the right side of the drain pipe, and the high-efficiency filter is arranged inside the air duct and is located on the right side of the electric heater and controller.

2. The indoor simulation test and detection device for gas turbine inlet air desalination technology according to claim 1, characterized in that: The indoor simulation test and detection device for gas turbine intake air desalination technology also includes an axial flow induced draft fan, an atmospheric temperature and humidity sensor and a differential pressure gauge. The axial flow induced draft fan is arranged inside the air duct and is located on the right side of the high-efficiency filter. The atmospheric temperature and humidity sensor is arranged on the left side of the air duct. The differential pressure gauge is fixedly connected to the air duct and is located at the upper end of the air duct.

3. The indoor simulation test and detection device for gas turbine inlet air desalination technology according to claim 2, characterized in that: The indoor simulation test and detection device for gas turbine intake air desalination technology also includes a heated air temperature and humidity sensor, which is fixedly connected to the air duct and located at the upper end of the air duct, and the output end of the heated air temperature and humidity sensor is arranged inside the air duct.

4. The indoor simulation test and detection device for gas turbine inlet air desalination technology according to claim 3, characterized in that: The indoor simulation test and detection device for gas turbine intake air desalination technology also includes a clean water tank and a quantitative air extraction pump. The clean water tank is placed outside the air duct, one end of the quantitative air extraction pump is fixedly connected to the clean water tank, and the other end of the quantitative air extraction pump is fixedly connected to the air duct.

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