Device for measuring concentration of organic amine in waste gas after carbon capture

Abstract

The utility model provides a device for measuring the concentration of organic amine in waste gas after carbon capture. The measuring device comprises a gas sampling gun, a pre-filter, a first absorption device, a second absorption device, a dryer, an air extractor and an ion chromatography device which are sequentially connected through pipelines along the gas trend, the gas inlet end of the gas sampling gun extends into the industrial waste gas runner, the gas outlet end of the gas sampling gun is connected with the gas inlet end of the pre-filter, and the outer wall of the gas sampling gun is coated with an electric heating structure. By limiting the measuring device, the concentration of the organic amine in the outlet waste gas of the organic amine chemical absorption method carbon capture system can be detected and analyzed, data support is provided for controlling volatilization and escape of the organic amine in the carbon capture process, and the pollution of the organic amine to the ambient atmosphere is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the industrial carbon capture technical field relates to a kind of measurement device of organic amine concentration in waste gas after carbon capture. BACKGROUND

[0002] With the proposal of the "double carbon" goal, organic amine chemical absorption method carbon capture technology has attracted much attention and application in chemical industry, power, metallurgy and other industries. When the waste gas leaves the carbon capture system, it usually carries a certain amount of organic amine absorbent, which will form a strong carcinogen after being discharged into the atmosphere, posing a great threat to human health. Accurate determination of the concentration of organic amines in waste gas after carbon capture is the key to addressing the problem of organic amine emissions.

[0003] Organic amine absorbents usually have a certain volatility, and their content in waste gas after carbon capture is affected by temperature, pressure, humidity and composition. The existence form of organic amine in waste gas is mainly droplet, gas and aerosol, and the content of organic amine in waste gas at the outlet of the carbon capture system is in the range of 0.5-5 mg / m 3 Due to the lack of suitable online detection devices, the detection and analysis of organic amine concentration in gas is usually done offline, that is, after sampling on site, it is sent to the laboratory for detection and analysis.

[0004] The prior art discloses a method and application for measuring the concentration of gas-phase organic amines. It uses an excess of acidic solution to absorb organic amines in waste gas or air, then titrates the absorption liquid with acid and base, calculates the difference between the amount of hydrogen ions in the acidic solution and the amount of hydroxyl ions consumed in the alkaline solution, obtains the amount of substance of organic amines, and calculates the concentration of gas-phase organic amines by combining the volume of gas sampling.

[0005] The prior art also discloses a gaseous organic amine collection device and method, which is provided with filter head A, first gas washing bottle, second gas washing bottle, one-way valve, filter head B and air pump in sequence along the direction of gas flow. The gas washing bottle is filled with inorganic acid solution that can absorb organic amines. The concentration of gaseous organic amines is calculated by titration method to determine the organic amines in the absorption solution and combining the sampling volume of the air pump.

[0006] Currently, there are methods for measuring and analyzing the concentration of organic amines in the field of atmospheric environmental protection. However, due to the more complex composition of industrial waste gas compared to air and the more severe test environment, the existing methods suitable for measuring the concentration of organic amines in air are not suitable for testing the concentration of organic amines in industrial waste gas. The solid particles, moisture and other impurity gases contained in industrial waste gas are more than those in air. At the same time, when the industrial waste gas is extracted from the flue, the pressure, temperature and other parameters will change, causing the existence form of organic amines to change, resulting in certain measurement errors. In addition, with the iteration and upgrading of organic amine absorbents, the existing sampling and analysis technologies are not suitable for measuring the concentration of organic amines in the outlet waste gas of the carbon capture system. For example, it is difficult to distinguish the concentration of different effective components by titration for a composite amine solution. Therefore, it is urgent to design a device for measuring the concentration of organic amines in waste gas after carbon capture to overcome the defects of the prior art and meet the actual application requirements. Practical new type content

[0007] In view of the deficiencies of the prior art, the purpose of the present application is to provide a device for measuring the concentration of organic amines in waste gas after carbon capture. In the present application, by limiting the measuring device, the concentration of organic amines in the outlet waste gas of the organic amine chemical absorption method carbon capture system can be detected and analyzed, providing data support for controlling the volatilization and escape of organic amines during the carbon capture process, and reducing the pollution of organic amines to the environment.

[0008] To achieve this purpose, the present application adopts the following technical solutions:

[0009] In a first aspect, the present application provides a device for measuring the concentration of organic amines in waste gas after carbon capture, which comprises a gas sampling gun, a pre-filter, at least two groups of absorption devices, a dryer and a gas extraction device connected in sequence along the gas flow direction.

[0010] The gas inlet end of the gas sampling gun extends into the industrial waste gas flow channel, the gas outlet end is connected to the gas inlet end of the pre-filter, and the outer wall of the gas sampling gun is covered with an electric heating structure.

[0011] Each group of absorption devices is connected in series.

[0012] In the present application, by limiting the measuring device, the concentration of organic amines in the outlet waste gas of the organic amine chemical absorption method carbon capture system can be detected and analyzed, providing data support for controlling the volatilization and escape of organic amines during the carbon capture process, and reducing the pollution of organic amines to the environment.

[0013] It should be noted that, in the utility model, according to the characteristics of industrial waste gas, a gas sampling and measuring device with perfect functions, convenient operation and accurate measurement is designed, that is, a combination of a gas sampling gun, a pre-filter, at least two groups of absorption devices, a dryer and an air extraction device, and a corresponding operation method is proposed, so that the accurate measurement of the organic amine escape concentration in industrial waste gas is realized, that is, data support is provided for the performance evaluation of the carbon capture system absorbent, and a foundation is laid for controlling the emission of organic pollutants.

[0014] It should be noted that the specific model and structure of the gas sampling gun in the utility model are not specially limited, and a person skilled in the art can make adaptive adjustment according to the actual situation; the gas inlet end of the gas sampling gun is designed to face the airflow, the organic amine in the waste gas can be converted into a gaseous state by heating the gas sampling gun, the content of organic amine in the form of liquid droplets or aerosol can be reduced, and the gas sampling error can be reduced.

[0015] It should be noted that the pre-filter in the utility model is located behind the gas sampling gun, so that the solid particles in the gas can be effectively filtered, and the organic amine in the form of liquid droplets and aerosol can be prevented from adhering to the filter material.

[0016] It should be noted that the at least two groups of absorption devices in the utility model can be 2 groups, 3 groups, 4 groups, 5 groups or 6 groups, but are not limited to the listed values, and other values not listed in the range are also applicable.

[0017] As a preferred technical solution of the utility model, the electric heating structure comprises a temperature measuring device, a temperature controller and an electric heating sleeve which are electrically connected in sequence, and the electric heating sleeve is sleeved on the outer wall of the gas sampling gun.

[0018] As a preferred technical solution of the utility model, one end of the temperature measuring device is arranged in the gas sampling gun.

[0019] It should be noted that the internal structure of the sampling gun in the utility model can be a straight pipe section, which can strengthen the heat exchange effect between the inner wall of the sampling gun and the flue gas, and ensure daily pollution maintenance; the straight pipe section is provided with an in-pipe insert, such as a ribbon, a spiral coil, a wire coil, a solenoid spring and the like.

[0020] It should be noted that the working principle of the electric heating structure in the utility model includes that the temperature measuring device is inserted into the gas outlet tail of the gas sampling gun, the temperature is converted into an electric signal and input into the temperature controller, the temperature controller adjusts the power of the electric heating sleeve in time, so that the temperature in the gas sampling gun is about 150 DEG C, the organic amine in the waste gas can be completely converted into a gaseous state, and problems such as water condensation and corrosion caused by the reduction of the temperature of the industrial waste gas in the gas sampling gun can be prevented.

[0021] Preferably, the filter material used by the pre-filter is quartz wool or alkali-free glass wool.

[0022] It should be noted that the filling amount of quartz wool or alkali-free glass wool in the utility model is not limited, and the purpose is to prevent solid particles in industrial waste gas from entering the absorption liquid and affecting the subsequent organic amine concentration measurement.

[0023] As a preferred technical solution of the utility model, the at least two groups of absorption devices include a first absorption device and a second absorption device.

[0024] Preferably, the first absorption device includes a first absorption bottle, and the first absorption bottle is provided with a first absorption solvent.

[0025] Preferably, the first absorption solvent is a dilute sulfuric acid solution or a dilute hydrochloric acid solution.

[0026] As a preferred technical solution of the utility model, the second absorption device includes a second absorption bottle, and the second absorption bottle is provided with the second absorption solvent.

[0027] Preferably, the second absorption solvent is a dilute sulfuric acid solution or a dilute hydrochloric acid solution.

[0028] It should be noted that the first absorption solvent and the second absorption solvent in the utility model can be the same or different, and either of the dilute sulfuric acid solution or the dilute hydrochloric acid solution can be independently selected; wherein the first absorption bottle can be filled with 75 milliliters of dilute sulfuric acid solution, and the solution concentration is 0.05 moles per liter, the first absorption bottle adopts a standard frosted mouth, and has good sealing performance; the second absorption bottle is filled with 75 milliliters of dilute sulfuric acid solution, and the solution concentration is 0.05 moles per liter, and the second absorption bottle adopts a standard frosted mouth and has good sealing performance. Furthermore, the concentration and volume of the first absorption solvent and the second absorption solvent can be adaptively adjusted according to actual conditions.

[0029] It should be noted that the utility model mainly uses inorganic acid solution as an absorbent and uses a multi-stage multi-hole absorption bottle as a main absorption device in order to absorb as much organic amine in waste gas as possible.

[0030] As a preferred technical solution of the utility model, the dryer is provided with a moisture absorbent layer.

[0031] It should be noted that the specific structure of the dryer in the utility model is not specially limited, and a person skilled in the art can adaptively adjust it according to actual conditions.

[0032] Preferably, the moisture absorbent layer is a color-changing silica gel layer or a spherical molecular sieve layer.

[0033] It should be noted that the moisture absorbent layer in the utility model can absorb water vapor in the gas, and protect the sampling pump, and specifically, any one of a color-changing silica gel layer or a spherical molecular sieve layer can be selected.

[0034] As a preferred technical scheme of the utility model, the air extraction device comprises a sampling pump and an air extraction pipeline connected in sequence along the gas flow direction.

[0035] It should be noted that the sampling pump is designed in the utility model because its working flow rate is adjustable, the air extraction pressure can overcome the flow passage and sampling system pressure, and sufficient gas sampling amount is ensured, wherein the sampling pump air extraction flow rate is stably operated in the range of 0-20 liters per minute, and the sampling gas volume can be adjusted according to the requirement; the specific model of the sampling pump is not specially limited in the utility model, and the technical personnel in the field can make adaptive adjustment according to the actual situation.

[0036] As a preferred technical scheme of the utility model, a gas flow meter is arranged on the air extraction pipeline, and the gas flow meter is used for measuring the volume of the sampling gas.

[0037] It should be noted that the specific model of the gas flow meter is not specially limited in the utility model, and the technical personnel in the field can make adaptive adjustment according to the actual situation.

[0038] As a preferred technical scheme of the utility model, a thermometer and a pressure gauge are further arranged on the air extraction pipeline, and are used for measuring the temperature and pressure of the sampling gas.

[0039] It should be noted that the specific model of the thermometer and the pressure gauge is not specially limited in the utility model, and the technical personnel in the field can make adaptive adjustment according to the actual situation.

[0040] Exemplarily, the utility model provides a kind of measurement method of organic amine concentration in waste gas after carbon capture, and the measurement method is carried out using the measurement device described above.

[0041] The measurement method comprises:

[0042] (1) fill the filter material in the pre-filter, add the first absorption solvent and the second absorption solvent in the first absorption bottle and the second absorption bottle respectively, and add the moisture absorbent in the dryer;

[0043] (2) connect the gas outlet end of the gas sampling gun to the electric heater, the pre-filter, the first absorption bottle, the second absorption bottle, the dryer, the sampling pump and the gas flow meter in sequence along the gas flow direction, and check the air tightness of the measurement device;

[0044] (3) turn on the electric heater to heat the gas sampling gun, and after the temperature reaches the set value, the gas inlet end of the gas sampling gun is inserted into the industrial waste gas flow passage;

[0045] (4) open the sampling pump, adjust the air flow to the set value, and set the air time, record the air temperature and air pressure, after reaching the air time, close the sampling pump, record the air volume displayed by the gas flow meter;

[0046] (5) rinse the gas sampling gun, collect and mix the solution in the first absorption bottle and the solution in the second absorption bottle, mix the rinse liquid with the mixed solution again, and dilute the solution, and record the volume of the diluted solution;

[0047] (6) the diluted solution is quantitatively analyzed by ion chromatography device, the volume concentration of each effective component is recorded, and the component mass of organic amine, the gas sampling volume under standard conditions and the organic amine concentration in industrial waste gas under standard conditions are calculated in turn.

[0048] It should be noted that the utility model is aimed at the problem that the amount of organic amine pollutants carried in waste gas after the carbon capture system is difficult to measure, and a device and method for measuring the concentration of organic amine in waste gas after carbon capture are provided, wherein the gas sampling gun is used, the gas is heated during sampling, the form of organic amine in waste gas is converted into gas, and the absorption of organic amine can be realized; the pre-filter is arranged at the rear end of the gas sampling gun, which can effectively filter the solid particles in the waste gas and ensure the smooth passage of gaseous organic amine; the absorption liquid analysis device uses cation chromatography method, only the dilution of the absorbent is needed, without complex extraction and derivation process, and the measurement error caused by acid-base titration can also be avoided.

[0049] Preferably, in step (3), the set value of the temperature is 100-150 DEG C, for example, it can be 100 DEG C, 105 DEG C, 110 DEG C, 115 DEG C, 120 DEG C, 125 DEG C, 130 DEG C, 135 DEG C, 140 DEG C, 145 DEG C, 150 DEG C and the like, but not limited to the listed values, other values not listed in the range are also applicable.

[0050] In the utility model, the set value of the temperature is 100-150 DEG C, because in this range, the water vapor in the waste gas does not condense and precipitate or the organic amine is not overheated and decomposed, if it is not in this range, it may lead to inaccurate measurement; when the temperature is less than 100 DEG C, the water vapor in the waste gas condenses and precipitates, and the organic amine molecules are absorbed and attached to the inner wall of the pipeline by the condensed water, which is not absorbed by the absorption liquid; when the temperature is greater than 150 DEG C, the organic amine may be overheated and decomposed, leading to inaccurate measurement.

[0051] Preferably, in step (4), the set value of the adjusting air extraction flow is 30-40 L / min, for example, it can be 30 L / min, 32 L / min, 34 L / min, 36 L / min, 38 L / min, 40 L / min, etc., but not limited to the listed values, and other values not listed in the range are also applicable.

[0052] Preferably, in step (4), the set value of the air extraction time is greater than 40 min, for example, it can be 41 L / min, 42 L / min, 44 L / min, 50 L / min, 58 L / min, 60 L / min, etc., but not limited to the listed values, and other values not listed in the range are also applicable.

[0053] Preferably, in step (5), the rinsing gas sampling gun is rinsed with high-purity water.

[0054] Preferably, in step (5), the dilution treatment is performed by:

[0055] A certain multiple of high-purity water is added to the solution after the rinsing liquid is mixed with the mixed solution.

[0056] Preferably, the certain multiple is 5-10 times, for example, it can be 5 times, 6 times, 7 times, 8 times, 9 times, 10 times, etc., but not limited to the listed values, and other values not listed in the range are also applicable.

[0057] In the utility model, the certain multiple is 5-10 times, because in this range, the measurement result of ion chromatography can be more accurate, and if it is not in this range, the detection result may be greatly deviated, because the sample component complexity is high when the dilution multiple is low, the solution pH is acidic, and it does not meet the neutral demand; when the dilution multiple is high, it may be less than the detection lower limit, and the measurement data is not accurate.

[0058] Preferably, in step (6), the ion chromatography device adopts a cation chromatography column.

[0059] It should be noted that, by adopting the cation chromatography method, the mixed organic amine component in the waste gas can be accurately quantitatively analyzed, wherein the model of the cation chromatography column can be adaptively adjusted according to actual conditions.

[0060] Compared with the prior art, the utility model has the beneficial effects that:

[0061] In the utility model, by limiting the measuring device, the organic amine concentration in the organic amine chemical absorption method carbon capture system outlet waste gas can be detected and analyzed, data support is provided for controlling the volatilization and escape of organic amine in the carbon capture process, and the pollution of organic amine to the environment atmosphere is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 A schematic diagram of a device for measuring the concentration of organic amines in exhaust gas after carbon capture according to a specific embodiment of the present invention;

[0063] Among them, 1-gas sampling gun; 2-electric heating jacket; 3-prefilter; 4-first absorption device; 5-second absorption device; 6-dryer; 7-sampling pump; 8-thermometer; 9-pressure gauge; 10-gas flow meter. DETAILED DESCRIPTION

[0064] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0065] It should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0066] Those skilled in the art should understand that the present invention must include necessary pipelines, conventional valves and general pump equipment for realizing a complete process, but the above content does not belong to the main utility model points of the present invention. Those skilled in the art can add layouts on their own based on the process flow and equipment structure selection, and the present invention does not make special requirements and specific limitations on this.

[0067] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0068] In one embodiment, the utility model provides a kind of measurement device of organic amine concentration in waste gas after carbon capture, as Figure 1 As shown in the measurement device includes gas sampling gun 1, prefilter 3, at least two groups of absorption device, dryer 6 and air extraction device connected in order along the gas direction pipeline;Gas sampling gun 1 intake end is inserted into industrial waste gas flow channel, and the gas outlet end is connected with the intake end of prefilter 3, and the outer wall of gas sampling gun 1 is coated with electric heating structure;Each absorption device is connected in series.

[0069] It should be noted that, in the utility model, according to the characteristics of industrial waste gas, a gas sampling and measuring device with perfect function, convenient operation and accurate measurement is designed, i.e.

[0070] It should be noted that, in the utility model, the specific model and structure of gas sampling gun 1 are not specially limited, and the skilled person in the art can make adaptive adjustment according to the actual situation.

[0071] It should be noted that, in the utility model, prefilter 3 is located behind gas sampling gun 1, which can effectively filter solid particles in gas and avoid the attachment of droplet-shaped and aerosol-shaped organic amine on the filter material.

[0072] In one embodiment, the electric heating structure includes temperature measuring device, temperature controller and electric heating sleeve 2 connected in order, and the electric heating sleeve 2 is sleeved on the outer wall of gas sampling gun 1.

[0073] In one embodiment, one end of the temperature measuring device is arranged in the gas sampling gun 1.

[0074] It should be noted that, in the utility model, the working principle of electric heating structure includes that the temperature measuring device is inserted into the gas outlet tail of gas sampling gun 1, the temperature is converted into electric signal and input into temperature controller, the temperature controller adjusts the power of electric heating sleeve 2 in time, so that the temperature in gas sampling gun 1 is about 150 DEG C, which can convert all organic amine in waste gas into gas state, and can prevent the problems such as condensation and corrosion of water in industrial waste gas in gas sampling gun 1 due to temperature reduction.

[0075] In one embodiment, the filter material of prefilter 3 is quartz wool or alkali-free glass wool.

[0076] It should be noted that the filling amount of quartz wool or alkali-free glass wool in the utility model is not limited, and the purpose is to prevent solid particles in industrial waste gas from entering the absorption liquid and affecting the subsequent organic amine concentration measurement.

[0077] In one embodiment, the at least two groups of absorption devices include a first absorption device 4 and a second absorption device 5.

[0078] In one embodiment, the first absorption device 4 includes a first absorption bottle, and the first absorption bottle is provided with a first absorption solvent.

[0079] In one embodiment, the first absorption solvent is a dilute sulfuric acid solution or a dilute hydrochloric acid solution.

[0080] In one embodiment, the second absorption device 5 includes a second absorption bottle, and the second absorption bottle is provided with a second absorption solvent.

[0081] In one embodiment, the second absorption solvent is a dilute sulfuric acid solution or a dilute hydrochloric acid solution.

[0082] It should be noted that the first absorption solvent and the second absorption solvent in the utility model can be the same or different, and either of the dilute sulfuric acid solution or the dilute hydrochloric acid solution can be independently selected; wherein the first absorption bottle can be filled with 75 milliliters of dilute sulfuric acid solution, and the solution concentration is 0.05 moles per liter, the first absorption bottle adopts a standard frosted mouth, and has good sealing performance; the second absorption bottle is filled with 75 milliliters of dilute sulfuric acid solution, and the solution concentration is 0.05 moles per liter, the second absorption bottle adopts a standard frosted mouth, and has good sealing performance. Furthermore, the concentration and volume of the first absorption solvent and the second absorption solvent can be adaptively adjusted according to actual conditions.

[0083] It should be noted that the utility model is to absorb as much organic amine in waste gas as possible, mainly uses inorganic acid solution as the absorbent, and adopts a multi-stage multi-hole absorption bottle as the main absorption device.

[0084] In one embodiment, the dryer 6 is provided with a hygroscopic agent layer.

[0085] It should be noted that the specific structure of the dryer 6 in the utility model is not specially limited, and a person skilled in the art can adaptively adjust according to actual conditions.

[0086] In one embodiment, the hygroscopic agent is a color-changing silica gel layer or a spherical molecular sieve layer.

[0087] It should be noted that the hygroscopic agent in the utility model can absorb water vapor in the gas and protect the sampling pump 7, and specifically can select any one of color-changing silica gel or spherical molecular sieve.

[0088] In one embodiment, the air extraction device comprises a sampling pump 7 and an air extraction pipeline connected in sequence along the gas flow direction.

[0089] It should be noted that the sampling pump 7 is designed in the utility model, because its working flow is adjustable, the air extraction pressure can overcome the flow passage and sampling system pressure, and sufficient gas sampling amount is ensured, wherein the sampling pump 7 works stably in the range of 0-20 liters per minute, and the sampling gas volume can be adjusted according to the requirement; the specific model of the sampling pump 7 is not specially limited in the utility model, and the skilled person in the art can make adaptive adjustment according to the actual situation.

[0090] In one embodiment, a gas flow meter 10 is arranged on the air extraction pipeline, and the gas flow meter 10 is used for measuring the volume of the sampling gas.

[0091] It should be noted that the specific model of the gas flow meter 10 is not specially limited in the utility model, and the skilled person in the art can make adaptive adjustment according to the actual situation.

[0092] In one embodiment, a thermometer 8 and a pressure gauge 9 are further arranged on the air extraction pipeline, and are used for measuring the temperature and pressure of the sampling gas.

[0093] It should be noted that the specific model of the thermometer 8 and the pressure gauge 9 is not specially limited in the utility model, and the skilled person in the art can make adaptive adjustment according to the actual situation.

[0094] In another specific embodiment, the utility model provides a kind of measurement method of organic amine concentration in waste gas after carbon capture, and measurement method is carried out using the above measurement device.

[0095] In one embodiment, the measurement method comprises:

[0096] (1) fill the filter material in the pre-filter 3, add the first absorption solvent and the second absorption solvent in the first absorption bottle and the second absorption bottle respectively, and add the moisture absorbent in the dryer 6;

[0097] (2) the gas outlet end of the gas sampling gun 1 is connected in sequence along the gas flow direction electric heater, pre-filter 3, first absorption bottle, second absorption bottle, dryer 6, sampling pump 7 and gas flow meter 10, and the air tightness of the measurement device is checked;

[0098] (3) open the electric heater to heat the gas sampling gun 1, and after the temperature reaches the set value, the gas inlet end of the gas sampling gun 1 is inserted into the industrial waste gas flow passage;

[0099] (4) open the sampling pump 7, adjust the air extraction flow to the set value, set the air extraction time, record the air extraction temperature and air extraction pressure, after reaching the air extraction time, close the sampling pump 7, and record the air extraction volume displayed by the gas flow meter 10;

[0100] (5) The rinse gas sampling gun 1 collects and mixes the solution in the first absorption bottle and the solution in the second absorption bottle, mixes the rinse liquid with the mixed solution again, and performs a dilution treatment, and records the volume of the diluted solution;

[0101] (6) The diluted solution is quantitatively analyzed by an ion chromatography device, the volume concentration of each effective component is recorded, and the component mass of the organic amine, the gas sampling volume under standard conditions, and the organic amine concentration in the industrial waste gas under standard conditions are sequentially calculated.

[0102] In one embodiment, in step (3), the set value of the temperature is 100-150°C, for example, it can be 100°C, 105°C, 110°C, 115°C, 120°C, 125°C, 130°C, 135°C, 140°C, 145°C, 150°C, etc., but not limited to the listed values, other values not listed in this range are also applicable.

[0103] In one embodiment, in step (4), the set value of the adjusted air flow is 30-40 L / min, for example, it can be 30 L / min, 32 L / min, 34 L / min, 36 L / min, 38 L / min, 40 L / min, etc., but not limited to the listed values, other values not listed in this range are also applicable.

[0104] In one embodiment, in step (4), the set value of the air extraction time is greater than 40 min, for example, it can be 41 L / min, 42 L / min, 44 L / min, 50 L / min, 58 L / min, 60 L / min, etc., but not limited to the listed values, other values not listed in this range are also applicable.

[0105] In one embodiment, in step (5), the rinse gas sampling gun 1 uses high-purity water for rinsing.

[0106] In one embodiment, in step (5), the dilution treatment is performed by the following method:

[0107] A certain multiple of high-purity water is added to the solution after the rinse liquid is mixed with the mixed solution again for dilution.

[0108] In one embodiment, the certain multiple is 5-10 times, for example, it can be 5 times, 6 times, 7 times, 8 times, 9 times, 10 times, etc., but not limited to the listed values, other values not listed in this range are also applicable.

[0109] In one embodiment, in step (6), the ion chromatography device uses a cation chromatography column.

[0110] It should be noted that the utility model discloses a cation chromatography method can be used for accurately quantitatively analyzing the mixed organic amine component in waste gas, wherein the model of the cation chromatographic column can be adjusted according to actual conditions.

[0111] Embodiment 1

[0112] The embodiment provides a device for measuring the concentration of organic amine in waste gas after carbon capture, wherein:

[0113] The measuring device comprises a gas sampling gun 1, a pre-filter 3, a first absorption device 4, a second absorption device 5, a dryer 6 and a gas extraction device connected in sequence along the gas flow direction; the gas inlet end of the gas sampling gun 1 extends into the industrial waste gas flow channel, the gas outlet end is connected to the gas inlet end of the pre-filter 3, and the outer wall of the gas sampling gun 1 is covered with an electric heating structure; each set of absorption devices are connected in series.

[0114] The electric heating structure comprises a temperature measuring device, a temperature controller and an electric heating sleeve 2 connected in sequence, the electric heating sleeve 2 is sleeved on the outer wall of the gas sampling gun 1, and one end of the temperature measuring device is arranged in the gas sampling gun 1.

[0115] The pre-filter 3 uses quartz wool as the filter material.

[0116] The first absorption device 4 comprises a first absorption bottle, and the first absorption bottle is provided with dilute sulfuric acid solution; the second absorption device 5 comprises a second absorption bottle, and the second absorption bottle is provided with dilute sulfuric acid solution.

[0117] The dryer 6 is provided with a moisture absorbent, and the moisture absorbent is color-changing silica gel.

[0118] The gas extraction device comprises a sampling pump 7 and a gas extraction pipeline connected in sequence along the gas flow direction, and the gas extraction pipeline is provided with a gas flow meter 10, a thermometer 8 and a pressure gauge 9.

[0119] The measuring method of the organic amine concentration in waste gas after carbon capture provided by the embodiment comprises:

[0120] (1) fill the pre-filter 3 with quartz wool, add dilute sulfuric acid solution to the first absorption bottle and the second absorption bottle, and add color-changing silica gel to the dryer 6;

[0121] (2) connect the gas outlet end of the gas sampling gun 1 to an electric heater, the pre-filter 3, the first absorption bottle, the second absorption bottle, the dryer 6, the sampling pump 7 and the gas flow meter 10 in sequence along the gas flow direction, and check the air tightness of the measuring device;

[0122] (3) turn on the electric heater to heat the gas sampling gun 1, and after the temperature reaches 100 DEG C, extend the gas inlet end of the gas sampling gun 1 into the industrial waste gas flow channel;

[0123] (4) Turn on the sampling pump 7, adjust the air flow to 30 L / min, and set the air extraction time to 50 min. Record the air extraction temperature and air extraction pressure. After reaching the air extraction time, turn off the sampling pump 7, and record the air extraction volume displayed by the gas flow meter 10;

[0124] (5) Rinse the gas sampling gun 1, collect and mix the solution in the first absorption bottle and the solution in the second absorption bottle, mix the rinse solution with the mixed solution again, and perform dilution treatment. Record the volume of the diluted solution;

[0125] (6) The diluted solution is subjected to quantitative analysis by the ion chromatography device. Record the volume concentration of each effective component, and sequentially calculate the component mass of the organic amine, the gas sampling volume under standard conditions, and the organic amine concentration in the industrial waste gas under standard conditions.

[0126] In step (5), the dilution treatment is performed by the following method:

[0127] After the rinse solution is mixed with the mixed solution again, 5 times of high-purity water is added to the solution for dilution.

[0128] In step (6), the ion chromatography device uses a cation chromatography column.

[0129] Example 2

[0130] The present embodiment provides a device for measuring the concentration of organic amine in waste gas after carbon capture, wherein:

[0131] The measuring device comprises a gas sampling gun 1, a pre-filter 3, a first absorption device 4, a second absorption device 5, a dryer 6, and an air extraction device connected in sequence along the gas flow path. The gas inlet end of the gas sampling gun 1 extends into the industrial waste gas flow channel, the gas outlet end is connected to the gas inlet end of the pre-filter 3, and the outer wall of the gas sampling gun 1 is covered with an electric heating structure. Each set of absorption devices is connected in series.

[0132] The electric heating structure comprises a temperature measuring device, a temperature controller, and an electric heating jacket 2 connected in sequence. The electric heating jacket 2 is provided on the outer wall of the gas sampling gun 1, and one end of the temperature measuring device is arranged in the gas sampling gun 1.

[0133] The pre-filter 3 uses alkali-free glass wool as the filter material.

[0134] The first absorption device 4 comprises a first absorption bottle, and the first absorption bottle is provided with a dilute hydrochloric acid solution. The second absorption device 5 comprises a second absorption bottle, and the second absorption bottle is provided with a dilute hydrochloric acid solution.

[0135] The dryer 6 is provided with spherical molecular sieves.

[0136] The air extraction device comprises a sampling pump 7 and an air extraction pipeline connected in sequence along the gas flow direction, and the air extraction pipeline is provided with a gas flow meter 10, a thermometer 8 and a pressure gauge 9.

[0137] The method for measuring the concentration of organic amines in the exhaust gas after carbon capture comprises the following steps:

[0138] (1) The pre-filter 3 is filled with alkali-free glass wool, dilute hydrochloric acid solution is added into the first absorption bottle and the second absorption bottle, and spherical molecular sieves are added into the dryer 6;

[0139] (2) The gas outlet end of the gas sampling gun 1 is connected in sequence along the gas flow direction to an electric heater, the pre-filter 3, the first absorption bottle, the second absorption bottle, the dryer 6, the sampling pump 7 and the gas flow meter 10, and the air tightness of the measuring device is checked;

[0140] (3) The electric heater is turned on to heat the gas sampling gun 1, and after the temperature reaches 150℃, the gas inlet end of the gas sampling gun 1 is inserted into the industrial exhaust gas flow channel;

[0141] (4) The sampling pump 7 is turned on, the air extraction flow rate is adjusted to 40 L / min, the air extraction time is set to 40 min, the air extraction temperature and the air extraction pressure are recorded, after the air extraction time is reached, the sampling pump 7 is turned off, and the air extraction volume displayed by the gas flow meter 10 is recorded;

[0142] (5) The gas sampling gun 1 is rinsed, the solutions in the first absorption bottle and the second absorption bottle are collected and mixed, the rinsing solution is mixed with the mixed solution again, and dilution treatment is performed, and the volume of the diluted solution is recorded;

[0143] (6) The diluted solution is subjected to quantitative analysis by an ion chromatography device, the volume concentrations of various effective components are recorded, and the component mass of the organic amines, the gas sampling volume under standard conditions and the concentration of the organic amines in the industrial exhaust gas under standard conditions are sequentially calculated.

[0144] In step (5), the dilution treatment is performed in the following manner:

[0145] After the rinsing solution is mixed with the mixed solution again, 10 times of high-purity water is added to the solution for dilution.

[0146] In step (6), the ion chromatography device adopts a cation chromatography column.

[0147] Comparative Example 1

[0148] The comparative example provides a measuring device for the concentration of organic amines, wherein:

[0149] The filter head A, the first gas washing bottle, the second gas washing bottle, the one-way valve, the filter head B and the air pump are sequentially arranged along the gas flowing direction, the inorganic acid solution capable of absorbing the organic amine is filled in the gas washing bottle, and the organic amine in the absorption solution is determined by titration.

[0150] The organic amine concentration of the measuring device used in the above examples and comparative examples is determined, the gas amount is 40L / min, and the time is 40min.

[0151] Table 1 organic amine measurement results of the measuring device of examples and comparative examples

[0152] Measurement results Example 1 62.3 mg / Nm 3 ]] Example 2 65.1 mg / Nm 3 ]] Comparative Example 1 27.6 mg / Nm 3 ]]

[0153] As shown in the above table 1, the accuracy of the measuring device in the utility model is higher than that of the measuring device in the comparative example, because the gas sampling gun used in the utility model is heated during the sampling process, the form of the organic amine in the waste gas is converted into gas, and the organic amine can be completely absorbed; by arranging the pre-filter 3 at the rear end of the gas sampling gun 1, the solid particles in the waste gas can be effectively filtered, and the gaseous organic amine can smoothly pass through; the absorption liquid analysis device uses cation chromatography, only the absorbent needs to be diluted, without complex extraction and derivatization process, and the measurement error caused by acid-base titration can also be avoided.

[0154] In summary, by limiting the measuring device, the organic amine concentration in the outlet waste gas of the organic amine chemical absorption method carbon capture system can be detected and analyzed, data support for controlling the volatilization and escape of the organic amine in the carbon capture process is provided, and the pollution of the organic amine to the environment is reduced.

[0155] The above only describes specific embodiments of the utility model, but the protection scope of the utility model is not limited to this, and those skilled in the art should understand that any changes or replacements within the technical range disclosed by the utility model can be easily thought of by those skilled in the art, and all fall within the protection scope and disclosure range of the utility model.

Claims

1. A device for measuring the concentration of organic amines in exhaust gas after carbon capture, characterized in that: The measuring device comprises a gas sampling gun, a pre-filter, at least two groups of absorption devices, a dryer and a gas extraction device which are sequentially connected in pipelines along the direction of the gas; The air inlet end of the gas sampling gun extends into the industrial waste gas flow channel, the air outlet end is connected to the air inlet end of the pre-filter, and the outer wall of the gas sampling gun is covered with an electric heating structure; Each group of the absorption devices is connected in series.

2. The device for measuring the concentration of organic amines in exhaust gas after carbon capture according to claim 1, characterized in that: The electric heating structure comprises a temperature measuring device, a temperature controller and an electric heating sleeve which are electrically connected in sequence. The electric heating sleeve is sleeved on the outer wall of the gas sampling gun.

3. The device for measuring the concentration of organic amines in exhaust gas after carbon capture according to claim 2, characterized in that: One end of the temperature measuring device is arranged in the gas sampling gun.

4. The device for measuring the concentration of organic amines in exhaust gas after carbon capture according to claim 1, characterized in that: The at least two groups of absorption devices include a first absorption device and a second absorption device; The first absorption device includes a first absorption bottle, and the first absorption bottle is used to contain a first absorption solvent.

5. The device for measuring the concentration of organic amines in exhaust gas after carbon capture according to claim 4, characterized in that: The second absorption device includes a second absorption bottle, and the second absorption bottle is used to contain a second absorption solvent.

6. The device for measuring the concentration of organic amines in exhaust gas after carbon capture according to claim 1, characterized in that: A moisture absorbent layer is provided in the dryer.

7. The device for measuring the concentration of organic amines in exhaust gas after carbon capture according to claim 6, characterized in that: The moisture absorbent layer is a color-changing silica gel layer or a spherical molecular sieve layer.

8. The device for measuring the concentration of organic amines in exhaust gas after carbon capture according to claim 1, characterized in that: The gas extraction device comprises a sampling pump and a gas extraction pipeline which are sequentially connected along the direction of the gas.

9. The device for measuring the concentration of organic amines in exhaust gas after carbon capture according to claim 8, characterized in that: A gas flow meter is provided on the air extraction pipeline, and the gas flow meter is used to measure the volume of the sampled gas.

10. The device for measuring the concentration of organic amines in exhaust gas after carbon capture according to claim 9, characterized in that: The air extraction pipeline is also provided with a thermometer and a pressure gauge for measuring the temperature and pressure of the sampled gas.

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