CN213600650U - Photocatalytic degradation NOx reaction and test system - Google Patents
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- CN213600650U CN213600650U CN202022564637.7U CN202022564637U CN213600650U CN 213600650 U CN213600650 U CN 213600650U CN 202022564637 U CN202022564637 U CN 202022564637U CN 213600650 U CN213600650 U CN 213600650U
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Abstract
The utility model discloses a photocatalytic degradation NOx reaction and test system, which relates to the field of photocatalytic reaction devices and aims to solve the problem that the existing photocatalytic experimental device can not simulate the gas flow in the atmospheric environment; the utility model comprises a gas supply bottle group, a pipeline, a plurality of valve pieces, a plurality of pressure measuring devices, a temperature measuring device, a plurality of flowmeters, a humidity generator, a gas mixing system, a photocatalytic reaction kettle, a light source, a gas circulating device and an atmosphere measuring instrument, wherein the humidity generator can select whether to be humidified, and the gas circulating device can simulate the flow of gas; the utility model discloses can simulate under the atmospheric environment photocatalytic degradation NOx reaction more accurately, more accurate carry out the photocatalytic effect inspection, removable air supply and atmosphere measuring apparatu realize other gaseous reactions and the measurement of photocatalytic degradation, use more extensively.
Description
Technical Field
The utility model relates to a photocatalysis reaction unit field specifically is a photocatalysis degradation NOx reaction and test system.
Background
In recent years, with the rapid development of economy, the air quality problem is more prominent, the level of atmospheric pollutants is high, the emission of pollutants generated in the process of energy use is the main cause of severe haze, NOx is a key pollutant for enhancing the oxidative property of the atmosphere, after the NOx is emitted to the atmosphere, due to low valence, a complex chemical reaction occurs under the oxidation action of free radicals in the atmosphere, high-valence nitrates are generated, which are the main components of PM2.5, and the human health is seriously affected. Harmful NOx is degraded into nitrate by the photocatalytic material under the atmospheric environment, so that the aim of purification is fulfilled, and the photocatalytic material has important significance for degrading indoor environmental pollutant gases. The environmental management mode of environmental protection has become a research hotspot, and the atmospheric environment cannot be completely simulated through laboratory conditions at the present stage, particularly, factors such as atmospheric components, illumination, temperature and the like cannot be accurately controlled, so that the catalytic degradation effect of the photocatalytic material cannot be accurately verified.
Publication No. CN110314542A entitled photocatalytic reduction of CO2In the patent application of the invention of the photocatalytic system, a photocatalytic reduction of CO is disclosed2Although the reaction system is lack of an atmosphere humidity control device and an atmosphere flow control device in the reaction kettle, the device cannot simulate the atmospheric environment and may influence the accuracy of the photocatalytic result; furthermore, the system is limited to CO only2The application environment is single by the photocatalytic degradation measurement; therefore, a photocatalytic degradation reaction and test system for NOx is urgently needed to solve the problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a photocatalysis degradation NOx reaction and test system to solve the problem that current photocatalysis experimental apparatus can't simulate gas flow in the atmospheric environment.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a photocatalytic degradation NOx reaction and test system, includes gas cylinder group, pipeline, a plurality of valve members, a plurality of pressure measurement device, temperature measuring device, a plurality of flowmeter, humidity generator, mixes gas system, photocatalytic reaction cauldron, light source, gas circulation device and atmosphere measuring apparatu, wherein:
the valve comprises a pressure reducing valve, an electromagnetic valve, a three-way valve and an emptying valve, the gas supply cylinder group comprises an atmosphere gas source required by photocatalytic reaction simulation of the atmospheric environment, a gas source gas cylinder reacting with water is connected to the gas mixing system through the pressure reducing valve, the pressure measuring device, the flow meter and the electromagnetic valve which are connected in sequence, and the rest gas cylinders are connected with the humidity generator, the electromagnetic valve and the gas mixing system through the pressure reducing valve, the pressure measuring device, the flow meter and the electromagnetic valve which are connected in sequence;
the gas mixing system is used for mixing atmosphere, the gas outlet end of the gas mixing system is communicated to the photocatalytic reaction kettle through a gas inlet pipeline, and the gas inlet pipeline is provided with a vent valve, a pressure reducing valve and an electromagnetic valve;
the air inlet end and the air outlet end of the humidity generator are respectively connected with a three-way valve, and one ends of the two three-way valves are directly communicated through an air pipe;
the lower cavity of the photocatalytic reaction kettle comprises an outer shell, a heat insulation layer filled with heat insulation materials, a circulating water cooling layer communicated with a circulating cooling device, a resistance wire heating layer electrically connected with a resistance type heating device and an inner shell from outside to inside, the upper end of the photocatalytic reaction kettle is opened and is provided with a reaction kettle top cover which is detachably connected with the photocatalytic reaction kettle in a sealing way, the reaction kettle top cover is provided with a light-transmitting sealing window which is horizontally arranged, and the reaction kettle top cover is also provided with a pressure measuring device and a temperature measuring device which are used for measuring the temperature and the pressure in the lower cavity of the photocatalytic reaction kettle;
the air suction port and the air supply port of the gas circulation device are both provided with electromagnetic valves and are respectively communicated with the photocatalytic reaction kettle;
the light source is arranged above the sealed window, and the irradiation direction faces to the inside of the lower cavity;
the atmosphere measuring instrument is communicated to the photocatalytic reaction kettle through an air suction pipeline provided with an electromagnetic valve and used for measuring the atmosphere composition in the photocatalytic reaction kettle.
Preferably, the air suction port of the gas circulation device is communicated with the bottom end inside the lower cavity of the photocatalytic reaction kettle, and the air supply port is communicated with the top end inside the lower cavity.
Preferably, the light source adopts the xenon lamp, and the light filter is installed to the lower extreme, and one side of photocatalytic reaction cauldron is provided with the light source elevating platform, and light source fixed mounting is on the light source elevating platform, and the light source elevating platform disposes high adjusting device, and high adjusting device adopts servo ball screw mechanism for adjust the distance of light source to photocatalytic reaction cauldron.
Preferably, the gas supply cylinder group is also provided with two reserved pipelines and a reserved valve, and the two reserved pipelines are respectively communicated with the gas mixing system and the gas inlet end of the humidity generator;
preferably, one side of the upper end of the lower cavity of the photocatalytic reaction kettle is provided with an emptying pipeline, and the emptying pipeline is provided with an electromagnetic valve and an emptying valve.
Preferably, the sealing window is colorless optical glass, the sealing window is detachably connected with the top cover of the reaction kettle, and an elastic sealing ring is arranged at the joint gap for sealing.
Preferably, an air inlet has been seted up respectively at both ends about one side of mixing the gas system, the gas outlet has been seted up to the opposite side upper end, mix the gas system and be the rectangle and inside upper end and the vertical a plurality of drainage baffles that are provided with of lower extreme, the vertical direction length ratio of drainage baffle mixes the inside highly short of gas system, adjacent drainage baffle interval is 5mm, mix the drainage baffle fixed mounting who sets up air inlet one side in the gas system most closely at the lower extreme, each drainage baffle is rather than adjacent drainage baffle fixed mounting in the different ends, mix the drainage baffle fixed mounting who sets up gas outlet one side in the gas system most closely in the gas system in the upper end.
Compared with the prior art, the beneficial effects of the utility model are that:
1. this photocatalytic degradation NOx reaction and test system can simulate atmospheric environment better, can simulate photocatalytic degradation NOx reaction under the atmospheric environment more accurately, and the more accurate photocatalysis effect that carries on is examined.
2. This photocatalysis degradation NOx reaction and test system has humidity generator, and is equipped with the three-way valve, can set for the control gas flow direction according to the experiment, selects whether to need the humidification, and accurate control reaction gas humidity can the different atmospheric environment of accurate simulation.
3. The reaction and test system for degrading NOx by photocatalysis has a gas circulating device, has two sets of schemes of static and dynamic, and can simulate a closed environment and an open environment in which air flows, so that the simulation of photocatalysis conditions is more accurate and diversified.
4. The reaction and test system for photocatalytic degradation of NOx can also realize real-time monitoring and regulation of various parameters through the control device, and can realize automatic simulation of the reaction of photocatalytic degradation of NOx gas in natural environment according to test parameter setting.
5. The reaction and test system for degrading NOx by photocatalysis has a reserved pipeline provided with a reserved valve, is not limited to the reaction and test of the NOx gas by photocatalysis degradation, can replace a gas source and an atmosphere measuring instrument, and realizes the photocatalytic degradation of other gases (such as VOCs and CO)2Etc.), and more widely applicable.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the photocatalytic reaction kettle, the light source and the light source lifting platform of the present invention.
In the figure: the device comprises a gas supply bottle group 1, a valve group 2, a pressure measuring device 3, a temperature measuring device 4, a flow meter 5, a humidity generator 6, a gas mixing system 7, a photocatalytic reaction kettle 8, a light source 9, a light source lifting table 10, a gas circulating device 11, an atmosphere measuring instrument 12, a control device 13, a circulating water cooling layer 8-1, a heat preservation layer 8-2, a resistance wire heating layer 8-3, a reaction kettle sealing ring 8-4, a reaction kettle top cover 8-5, an optical glass sealing ring 8-6, colorless optical glass 8-7, a light filter 9-1 and a height adjusting device 10-1.
Detailed Description
A photocatalytic degradation NOx reaction and test system comprises a gas supply bottle group 1, a pipeline, a plurality of valve pieces 2, a plurality of pressure measuring devices 3, a temperature measuring device 4, a plurality of flow meters 5, a humidity generator 6, a gas mixing system 7, a photocatalytic reaction kettle 8, a light source 9, a gas circulating device 11 and an atmosphere measuring instrument 12, and can be controlled more automatically by adding a control device 13; the concrete structure and function are as follows:
gas supply cylinder group 1: the device consists of an atmosphere gas source required by a photocatalytic reaction simulation atmosphere environment, and is sequentially connected with a humidity generator and a gas mixing system through a pressure reducing valve, a pressure measuring device, a flow meter and an electromagnetic valve, wherein gas reacted with water is directly connected to the gas mixing system without passing through the humidity generator.
Valve element 2: the device mainly comprises a pressure reducing valve, an electromagnetic valve, a three-way valve and an emptying valve; the pressure reducing valve controls the pressure of airflow flowing into the air path, the electromagnetic valve controls the opening and closing of the air path, the three-way valve is used for controlling the flow direction of the multi-path airflow, and the emptying valve automatically empties the air path under the condition that the air pressure exceeds the limit, so that the safety of the air path is ensured; various control valves can be connected with the control device 13, such as a PLC, and full-automatic accurate control of the gas circuit can be realized.
Humidity generator 6: for the common humidity generator in market, can take place the air current or atmosphere that water vapor content is invariable and knowable under certain condition, can be in the accurate control of relative humidity for the within range of 3-90% RH, humidity stability can reach 0.2%, humidity generator is equipped with the three-way valve, can set for the control gas flow direction according to the test, selects whether to need the humidification.
And (3) a gas mixing system 7: the method is mainly used for mixing photocatalytic reaction gas to ensure that gas components are uniform.
Photocatalytic reaction kettle 8: the photocatalytic reaction kettle is a photocatalytic reaction generation container, and a lower cavity body is from outside to inside and needs to comprise five parts, namely an outer shell, a heat insulation layer, a circulating water cooling layer, a resistance wire heating layer and an inner shell; the heat preservation fills insulation material, and circulating water cooling layer connects the circulative cooling device, and the coolant liquid can be deionized water, and resistance wire heating layer connects resistance-type heating device, and inside and outside shell body can adopt steel material.
The top cover of the reaction kettle is provided with a light-transmitting sealing window, and the sealing window can be made of colorless optical glass so as to reduce the loss of light during transmission and more accurately simulate natural light; the sealing window can be tightly pressed and sealed by adopting a steel ring pressing sheet, an elastic sealing ring and a thread structure to realize the detachable connection of sealing and can also be realized by adopting other structures; the top cover of the reaction kettle is provided with a pressure measuring device and a temperature measuring device, and the pressure and temperature sensing end is arranged in the lower cavity body.
The gas circulating device 11 can realize two sets of schemes of static and dynamic photocatalytic reaction, and the static gas circulating device is closed to simulate a closed environment; the dynamic gas circulation device is started to simulate the open environment of air flow, and the gas circulation volume can be adjusted according to the test requirement; the gas circulation device 11 can be a common gas circulation pump in the market; the air suction port and the air supply port of the gas circulation device 11 are respectively positioned at the top end and the bottom end of the lower cavity of the reaction kettle, and the gas in the reaction kettle is ensured to fully flow in a dynamic condition by adopting an 'up suction and down feeding' mode, so that the atmospheric environment is fully simulated.
Light source 9: most of the photocatalysis experiments need to simulate sunlight, and a xenon lamp light source has a spectrum similar to that of the sunlight, so that the light source 9 preferably adopts a high-light-power full-waveband xenon lamp light source, the wavelength of which is continuously distributed and covers an ultraviolet region, a visible light region and an infrared region; the lower end of the light source is provided with a replaceable optical filter which can simulate various illumination environments.
Light source elevating platform 10: the light source 9 is mainly used for installation, and the light source lifting platform is provided with a height adjusting device, so that the distance between the light source and the photocatalytic reaction kettle can be accurately adjusted.
Atmosphere measuring instrument 12: the device is used for detecting the components of the photocatalytic front and back gases in the reaction kettle, and can adopt a common type on the market with a built-in air pump or an external air pump.
The control device 13: the control device 13 is electrically connected with each valve 2, each pressure measuring device 3, the temperature measuring device 4, each flow meter 5, the humidity generator 6, the circulating cooling device 11, the resistance type heating device, the light source 9, the gas circulating device 11 and the atmosphere measuring instrument 12 respectively; the control device 13 comprises an information acquisition module and an information processing module, wherein the information acquisition module acquires information such as pressure, temperature, illumination intensity, gas components and the like, can input an experiment set value, and is adjusted and controlled through the information processing module and the set value; the information processing module is used for receiving the result of the atmosphere measuring instrument 12 and regulating and controlling each device in real time by the set value; for example: the pressure measuring device 3 detects the air flow pressure of each air path and feeds the air flow pressure back to the control device 13, so that the accurate control of the air path pressure is realized; the temperature measuring device 4 measures the real-time temperature of the reaction gas in the reaction kettle and feeds the real-time temperature back to the control device 13, so that the temperature of the reaction gas in the reaction kettle is accurately controlled; the humidity generator 6 is connected with the control device 13, so that the automatic and accurate control of the humidity of the mixed gas can be realized; the circulating cooling device and the resistance wire heating device are connected with the control device 13, so that the temperature of reaction gas in the photocatalytic reaction kettle can be accurately controlled; the pressure measuring and temperature measuring device of the top cover of the reaction kettle is connected with the control device 13, detects the pressure and temperature in the photocatalytic reaction kettle in real time, feeds the pressure and temperature back to the control device 13, can make real-time adjustment according to a set value, and realizes full-automatic accurate control of the pressure and temperature in the reaction kettle; the gas circulating device 11 is connected with the control device 13, and can realize periodic simulation of closed and open environments; the light source 9 is connected with the control device 13 and can be used for simulating 24h illumination intensity and light source irradiation with different wavelengths; the atmosphere measuring instrument 12 is connected with the control device 13, the measuring information can be directly fed back to the control device 13, and the control device 13 can also be connected with a computer or the Internet, so that remote checking is convenient; the control device 13 can be a commercially available PLC, and the conventional control can be easily realized by those skilled in the art.
Example (b):
referring to fig. 1, the reaction and test system for photocatalytic degradation of NOx provided in this embodiment includes a gas supply cylinder set 1, a pipeline, a plurality of valves 2, a plurality of pressure measuring devices 3, a temperature measuring device 4, a plurality of flow meters 5, a humidity generator 6, a gas mixing system 7, a photocatalytic reaction kettle 8, a light source 9, a gas circulation device 11, and an atmosphere measuring instrument 12, and the embodiment may further include a control device 13, where the control device 13 is electrically connected to each valve 2, each pressure measuring device 3, the temperature measuring device 4, each flow meter 5, the humidity generator 6, a circulation cooling device, a resistance heating device, the light source 9, the gas circulation device 11, and the atmosphere measuring instrument 12, respectively; wherein:
the valve 2 comprises a pressure reducing valve, an electromagnetic valve, a three-way valve and an emptying valve, the gas supply cylinder group 1 comprises an atmosphere gas source required by photocatalytic reaction simulation of the atmospheric environment, a gas source gas cylinder reacting with water is connected to the gas mixing system 7 through the pressure reducing valve, the pressure measuring device 3, the flowmeter 5 and the electromagnetic valve which are connected in sequence, and the rest gas cylinders are connected to the humidity generator 6, the electromagnetic valve and the gas mixing system 7 through the pressure reducing valve, the pressure measuring device 3, the flowmeter 5 and the electromagnetic valve which are connected in sequence; the control device 13 collects real-time data and controls the gas components and pressure of the reaction system according to experimental set values;
the gas mixing system 7 is used for mixing atmosphere, the gas outlet end of the gas mixing system 7 is communicated to the photocatalytic reaction kettle 8 through a gas inlet pipeline, and the gas inlet pipeline is provided with an emptying valve, a pressure reducing valve and an electromagnetic valve; the gas mixing system 7 can adopt a rectangular layered structure as shown in figure 1, the layered structure is arranged in a turning-back manner, the interlayer spacing is 5mm, the specific structure can be that the upper end and the lower end of one side of the gas mixing system 7 are respectively provided with an air inlet, the upper end of the other side is provided with an air outlet, the gas mixing system 7 is rectangular, the upper end and the lower end in the gas mixing system are vertically provided with a plurality of drainage clapboards, the vertical direction length of the drainage clapboard is shorter than the internal height of the gas mixing system 7, the spacing between the adjacent drainage clapboards is 5mm, the drainage clapboard closest to the side provided with the air inlet in the gas mixing system 7 is fixedly arranged at the lower end, each drainage clapboard is fixedly arranged at different ends with the adjacent drainage clapboard, the drainage clapboard closest to the side provided with the air outlet in the gas mixing system 7 is fixedly arranged, high-density gas is introduced from the top of the outermost layer to facilitate mixing, and all the gas enters the photocatalytic reaction kettle from the top of the outermost layer after being turned back and mixed by the layered structure; the gas mixing system 7 can also adopt other existing devices to realize the mixing of the gas;
the humidity generator 6 can realize automatic and accurate control of the humidity of the mixed gas, the gas inlet end and the gas outlet end of the humidity generator are respectively connected with a three-way valve, one end of each of the two three-way valves is directly communicated through a gas pipe, the flow direction of the gas can be controlled according to test setting, and whether humidification is needed or not is selected;
referring to fig. 2, the photocatalytic reactor 8 may have the following structure: the lower cavity comprises an outer shell, a heat insulation layer 8-2 filled with heat insulation materials, a circulating water cooling layer 8-1 communicated with a circulating cooling device, a resistance wire heating layer 8-3 electrically connected with a resistance type heating device and an inner shell from outside to inside, and the circulating cooling device and the resistance wire heating device are connected with a control device 13, so that the temperature of reaction gas in the photocatalytic reaction kettle 8 can be accurately controlled; the lower cavity of the photocatalytic reaction kettle is preferably a cylinder, and can also be a cuboid or other shapes; the upper end of the photocatalytic reaction kettle 8 is provided with an opening and is provided with a reaction kettle top cover 8-5 which is hermetically and detachably connected with the photocatalytic reaction kettle, the detachable connection mode can be a buckle or other modes shown in figure 2, a groove structure can be arranged on the contact surface of the upper end surface of the reaction kettle and the reaction kettle top cover, and an elastic sealing ring 8-4 is arranged in the groove structure to ensure the air tightness of the reaction kettle; the reaction kettle top cover 8-5 is provided with a light-transmitting sealing window which is horizontally arranged, the reaction kettle top cover 8-5 is also provided with a pressure measuring device 3 and a temperature measuring device 4 which are used for measuring the temperature and the pressure in the lower cavity of the photocatalytic reaction kettle 8, the pressure measuring device 3 and the temperature measuring device 4 are connected with the control device 13, the pressure and the temperature in the photocatalytic reaction kettle 8 can be detected in real time, and real-time adjustment can be made according to experimental setting; a sample plate table is arranged at the lower end in the photocatalytic reaction kettle 8 and can be used for placing a catalyst for photocatalytic reaction, such as titanium dioxide or titanocene dichloride and the like;
the air suction port and the air supply port of the gas circulation device 11 are both provided with electromagnetic valves and are respectively communicated with the photocatalytic reaction kettle 8; preferably, the air suction port of the gas circulation device 11 is communicated with the bottom end inside the lower cavity of the photocatalytic reaction kettle 8, the air supply port is communicated with the top end inside the lower cavity, and the gas circulation device 11 is connected with the control device 13 and can be used for realizing periodical simulation of closed and open environments and realizing automatic and accurate control;
the atmosphere measuring instrument 12 is communicated to the photocatalytic reaction kettle 8 through an air suction pipeline provided with an electromagnetic valve, is used for measuring atmosphere composition in the photocatalytic reaction kettle, is connected with the control device 13, and directly feeds back measurement information to the control device 13.
The light source 9 is arranged above the sealing window, and the irradiation direction faces to the lower cavity;
the light source 9 can adopt a xenon lamp, the lower end of the xenon lamp can be provided with an optical filter 9-1, the optical filter 9-1 can be arranged in a detachable mode and is provided with optical filters 9-1 with various specifications, various illumination environments can be simulated, and the light source 9 is connected with the control device 13 and can simulate 24-hour illumination intensity and illumination of light sources with different wavelengths; a light source lifting platform 10 can be further arranged on one side of the photocatalytic reaction kettle 8, the light source 9 is fixedly installed on the light source lifting platform 10, the light source lifting platform 10 is provided with a height adjusting device 10-1, the height adjusting device 10-1 can adopt a common commercially-available servo ball screw mechanism and is used for accurately adjusting the distance from the light source 9 to the photocatalytic reaction kettle 8, and the height adjusting device 10-1 can also be connected with a control device 13 and is convenient to use.
As shown in fig. 1, the gas supply cylinder group 1 can be further provided with two reserved pipelines and install a reserved valve 21, the two reserved pipelines are respectively communicated with the gas inlet ends of the gas mixing system 7 and the humidity generator 6 for being connected with other gas sources and making the utility model discloses can also carry out other gases (such as VOCs, CO)2Etc.);
one side of the upper end of the lower cavity of the photocatalytic reaction kettle 8 can be provided with a vent pipeline, and the vent pipeline is provided with an electromagnetic valve and a vent valve, so that redundant gas or overpressure gas can be automatically exhausted conveniently, and if the vent pipeline is not arranged, the gas is required to be exhausted completely through the atmosphere measuring instrument 12, so that the service life of the gas-exhaust-type photocatalytic reaction kettle is easily shortened.
The sealing window is preferably colorless optical glass 8-7, the sealing window is preferably detachably connected with the top cover 8-5 of the reaction kettle, and an elastic sealing ring 8-6 is arranged at the joint gap for sealing.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
The parts of the present invention not described in detail are the known techniques of those skilled in the art.
Claims (7)
1. A photocatalytic degradation NOx reaction and test system is characterized in that: including gas supply bottle group (1), pipeline, a plurality of valve member (2), a plurality of pressure measurement device (3), temperature measuring device (4), a plurality of flowmeter (5), humidity generator (6), gas mixing system (7), photocatalysis reation kettle (8), light source (9), gas circulation device (11) and atmosphere measuring apparatu (12), wherein:
the valve (2) comprises a pressure reducing valve, an electromagnetic valve, a three-way valve and an emptying valve, the gas supply cylinder group (1) comprises an atmosphere gas source required by photocatalytic reaction simulation of the atmospheric environment, the gas source gas cylinder reacting with water is connected to the gas mixing system (7) through the pressure reducing valve, the pressure measuring device (3), the flowmeter (5) and the electromagnetic valve which are connected in sequence, and the rest gas cylinders are connected to the humidity generator (6), the electromagnetic valve and the gas mixing system (7) through the pressure reducing valve, the pressure measuring device (3), the flowmeter (5) and the electromagnetic valve which are connected in sequence;
the gas mixing system (7) is used for mixing atmosphere, the gas outlet end of the gas mixing system (7) is communicated to the photocatalytic reaction kettle (8) through a gas inlet pipeline, and an emptying valve, a pressure reducing valve and an electromagnetic valve are arranged on the gas inlet pipeline;
the air inlet end and the air outlet end of the humidity generator (6) are respectively connected with a three-way valve, and one ends of the two three-way valves are directly communicated through an air pipe;
the lower cavity of the photocatalytic reaction kettle (8) comprises an outer shell, a heat insulation layer (8-2) filled with heat insulation materials, a circulating water cooling layer (8-1) communicated with a circulating cooling device, a resistance wire heating layer (8-3) electrically connected with a resistance type heating device and an inner shell from outside to inside, the upper end of the photocatalytic reaction kettle (8) is opened and is provided with a reaction kettle top cover (8-5) which is in sealing and detachable connection with the photocatalytic reaction kettle, the reaction kettle top cover (8-5) is provided with a light transmission sealing window which is horizontally arranged, and the reaction kettle top cover (8-5) is also provided with a pressure measuring device (3) and a temperature measuring device (4) for measuring the temperature and the pressure in the lower cavity of the photocatalytic reaction kettle (8);
the air suction port and the air supply port of the gas circulation device (11) are provided with electromagnetic valves and are respectively communicated with the photocatalytic reaction kettle (8);
the light source (9) is arranged above the sealing window, and the irradiation direction faces to the lower cavity;
the atmosphere measuring instrument (12) is communicated to the photocatalytic reaction kettle (8) through an air suction pipeline provided with an electromagnetic valve and used for measuring the atmosphere composition in the photocatalytic reaction kettle.
2. The reaction and test system for photocatalytic degradation of NOx as claimed in claim 1, wherein: and the air suction port of the gas circulating device (11) is communicated with the bottom end of the inner part of the lower cavity of the photocatalytic reaction kettle (8), and the air supply port is communicated with the top end of the inner part of the lower cavity.
3. The reaction and test system for photocatalytic degradation of NOx as claimed in claim 1, wherein: the light source (9) adopts a xenon lamp, the lower end of the light source is provided with a light filter (9-1), one side of the photocatalytic reaction kettle (8) is provided with a light source lifting table (10), the light source (9) is fixedly arranged on the light source lifting table (10), the light source lifting table (10) is provided with a height adjusting device (10-1), and the height adjusting device (10-1) adopts a servo ball screw mechanism and is used for adjusting the distance from the light source (9) to the photocatalytic reaction kettle (8).
4. The reaction and test system for photocatalytic degradation of NOx as claimed in claim 1, wherein: the gas supply bottle group (1) is also provided with two reserved pipelines and a reserved valve (21), and the two reserved pipelines are respectively communicated with the gas mixing system (7) and the gas inlet end of the humidity generator (6).
5. The reaction and test system for photocatalytic degradation of NOx as claimed in claim 1, wherein: one side of the upper end of the lower cavity of the photocatalytic reaction kettle (8) is provided with an emptying pipeline, and the emptying pipeline is provided with an electromagnetic valve and an emptying valve.
6. The reaction and test system for photocatalytic degradation of NOx as claimed in claim 1, wherein: the sealing window is colorless optical glass (8-7), the sealing window is detachably connected with the top cover (8-5) of the reaction kettle, and an elastic sealing ring (8-6) is arranged at the joint gap for sealing.
7. The reaction and test system for photocatalytic degradation of NOx as claimed in claim 1, wherein: mix both ends and seted up an air inlet respectively about one side of gas system (7), the gas outlet has been seted up to the opposite side upper end, mix gas system (7) and be the rectangle and inside upper end and the vertical a plurality of drainage baffles that are provided with of lower extreme, the vertical direction length ratio of drainage baffle mixes gas system (7) inside highly short, adjacent drainage baffle interval is 5mm, mix in gas system (7) and be the most nearly drainage baffle fixed mounting who sets up air inlet one side at the lower extreme, each drainage baffle is rather than adjacent drainage baffle fixed mounting in the different ends, mix in gas system (7) and be the most drainage baffle fixed mounting who sets up gas outlet one side in the upper end.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956150A (en) * | 2022-06-23 | 2022-08-30 | 南京航空航天大学 | Hydrothermal synthesis system of nano material, application thereof and preparation method of nano material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114956150A (en) * | 2022-06-23 | 2022-08-30 | 南京航空航天大学 | Hydrothermal synthesis system of nano material, application thereof and preparation method of nano material |
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