CN103170388A - Method for mounting and debugging condensing device for outdoor photochemical comprehensive experimental system - Google Patents

Abstract

The invention provides a method for mounting and debugging a condensing device for an outdoor photochemical comprehensive experimental system. The method comprises the following steps: mounting a condensing pie of the condensing device to the lower part of an aluminum plate of a smoke chamber of the outdoor photochemical comprehensive experimental system, dividing the aluminum plate into multiple parts which are arranged side by side, setting an independent condensing pipe and an independent control valve for each part, and controlling the temperature in the smoke chamber by regulating the opening degree of the control valve of the condensing pipe, so that the temperature in the smoke chamber is kept consistent. According to the mounting and debugging method, the structure, installation, debugging and other details of the condensing device for the outdoor photochemical comprehensive experimental system in details are completely introduced, and the temperature inside the smoke chamber can be kept uniform and consistent through the condensing device.

Description

Installation and debugging method of condensing device used in outdoor photochemical comprehensive experiment system

technical field

The invention relates to a method for installing and debugging a condensing device used in an outdoor photochemical comprehensive experiment system.

Background technique

Photochemical smog is also called "photochemical pollution". Hazardous mixed smog formed by photochemical reactions in the atmosphere. Such as the chemical pollutants produced by the chemical reaction of hydrocarbons and nitrogen oxides in the atmosphere under the action of sunlight. In 1944, photochemical smog occurred for the first time in Los Angeles, USA. Since then, Tokyo, Mexico City, Lanzhou, Shanghai and many other cities with heavy car pollution have appeared, and it has become a major air pollution phenomenon in many large cities.

Photochemical smog is produced in a complex system, and meteorological conditions (atmospheric stability, wind direction, wind speed, humidity, sunlight flux, etc.), pollutant status (composition, content, emission) and chemical reactions all play an important role. Therefore, in order to understand the formation mechanism of photochemical smog, in addition to measuring the concentration of pollutants in the atmosphere of the polluted area, it is necessary to separate the chemical reaction from the complex meteorological conditions.

To this end, scientific research institutions at home and abroad have designed various types of photochemical smog chambers. Under controllable conditions, the pollutants are irradiated with sunlight of appropriate intensity once to simulate the chemical process in the atmosphere, and through the study of the chemical reaction model, it is concluded that Reaction mechanism for the formation of photochemical oxidants from primary pollutants. Currently known domestic and foreign smoke boxes are usually divided into two types: outdoor and indoor. The biggest feature of the outdoor smoke box is the use of solar radiation, but the experiment is greatly affected by the weather, and there are many uncontrollable factors, so it is difficult to repeat. Many outdoor smoke chamber systems have been developed abroad, typically EUPHORE (http://euphore.es) in Spain and SAPHIR (http://www.fz-juelich.de/icg/icg-2/saphir) in Germany .

At the same time, on the basis of the research on the outdoor smog box, a corresponding photochemical comprehensive experimental system has been developed. On the basis of the outdoor smog box as the core, it is equipped with corresponding control and measurement methods to control the diffusion, transportation, chemical transformation and sedimentation. The relationship between such processes as air quality and pollution sources is expressed in a mathematical model to predict the time and space changes of the composition and concentration of pollutants under various meteorological conditions, as well as the impact on air quality, so as to seek control Measures of photochemical smog.

Existing systems that can be used for outdoor photochemical comprehensive experiments are usually used for academic research, and their practicability and repeatability are not high. In particular, there is a lack of introduction of corresponding installation and commissioning materials. And the introduction of some situations of using the smog box to carry out experimental research, but lack of introduction of the structure, installation, debugging, etc. of the complete outdoor photochemical comprehensive experiment system, it is difficult for those skilled in the art to refer to and implement. That is to say, those skilled in the art can't repeatedly reproduce the existing outdoor photochemical comprehensive experiment system without creative work according to the existing data.

Contents of the invention

The technical problem to be solved by the present invention is to provide an outdoor photochemical comprehensive experiment system to reduce or avoid the aforementioned problems. In particular, the present invention provides a method for installing and debugging a condensing device used in an outdoor photochemical comprehensive experiment system.

In order to solve the above-mentioned technical problems, the present invention proposes a method for installing and debugging the condensing device used in the outdoor photochemical comprehensive experiment system. The outdoor photochemical comprehensive experimental system includes a smoke box, a protective cover, a condensing device, a clean air device and an experimental analysis The device has five parts in total, wherein the protective cover, condensing device, clean air device and experimental analysis device are respectively connected to the smoke box; the smoke box is arranged on the roof of a concrete building, and the roof has a Rectangular opening, the opening is sealed and covered by an aluminum plate, the smoke box is set above the aluminum plate as a whole, and is located within the area of the opening; under the aluminum plate below the smoke box, the The condensing pipe of the condensing device, the condensing pipe is connected to the condensing unit arranged on the outside of the concrete building, and a convection mixing fan is also arranged inside the smoke box. The installation and debugging method includes the following steps:

Dividing the aluminum plate into several parts side by side, each part is provided with an independent condensing pipe and an independent control valve, and then all the condensing pipes are connected to the main pipe;

Open all valves controlling each condensing pipe to 50% of its opening, turn on the condensing unit for refrigeration and cooling, and turn on the convection mixing fan at the same time;

Set a temperature measuring device on the upper surface of the aluminum plate, after cooling for 1 hour, read the temperature values of each temperature measuring device, and take the average value of the temperature values;

Increase the valve opening at the position where the temperature is higher than A% of the average value by A%; reduce the valve opening at the position where the temperature value is lower than the average value B%; after adjusting in sequence, cool down for 1 Hour.

Repeat the above process, measure the temperature and adjust the opening of the valve until the difference between the temperature and the average value is less than 5%.

So far, the installation and commissioning of the whole condensing device has been completed.

Preferably, the condensation pipe has a square cross-section and is arranged close to the aluminum plate.

Preferably, the surface of the condensation pipe not in contact with the aluminum plate is provided with a heat insulation sleeve.

Preferably, before turning on the condensing unit for refrigeration and cooling, all openings of the concrete building are closed, and the air conditioner is used to dehumidify the interior of the concrete building.

Preferably, the dehumidification operation is performed until the hygrometer shows that the internal humidity of the concrete building is less than 10%, and then the condensing unit is turned on for refrigeration.

Preferably, if the opening value of the valve opening is greater than 100% after the opening of the valve is increased by A%, then it can no longer be adjusted to a larger direction, and it is enough to keep the valve at the maximum opening of 100%; if the valve opening If the opening value after the opening degree is reduced by B% is less than 1%, it is sufficient to keep the valve opening at 1%, and it is not necessary to close all the valves.

Preferably, under the aforementioned conditions, it is necessary to re-adjust the installation position of the condensation pipe and then perform the commissioning work again.

The invention provides a method for installing and debugging the condensing device used in the outdoor photochemical comprehensive experiment system. Compared with the existing materials, the installation and debugging method provided by the invention completely and in detail introduces the condensing device of the outdoor photochemical comprehensive experiment system. The details of the structure, installation, and commissioning of the device can make the temperature inside the smoke box uniform through the condensation device.

Description of drawings

The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention. in,

What Fig. 1 showed is the topological structure schematic diagram of the outdoor photochemical comprehensive experiment system according to the present invention;

What Fig. 2 shows is the exploded perspective view of the outdoor photochemical comprehensive experiment system according to a specific embodiment of the present invention;

What Fig. 3 shows is the detailed structural exploded perspective view of smoke box and condensing device in Fig. 2;

Figure 4 shows a schematic diagram of the closed state of the protective cover;

Fig. 5 shows a schematic diagram of the open state of the protective cover.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. Wherein, the same parts adopt the same reference numerals.

What Fig. 1 shows is according to the schematic diagram of the topology of the outdoor photochemical comprehensive experiment system of the present invention, as shown in the figure, the outdoor photochemical comprehensive experiment system of the present invention comprises smoke box 1, protective cover 2, condensing device 3, clean air device 4 and The experimental analysis device 5 has five parts, among which the smoke box 1 is the core equipment of the whole system, and the other four parts of the whole comprehensive experimental system are designed and set around the smoke box 1, that is to say, the protective cover 2, the condensing device 3, the cleaning The air device 4 and the experimental analysis device 5 are connected to the smoke box 1 respectively.

What Fig. 2 shows is an exploded perspective view of the outdoor photochemical comprehensive experiment system according to a specific embodiment of the present invention, as shown in the figure, in the outdoor photochemical comprehensive experimental system of the present invention, the smoke box 1 is arranged on a concrete building 6 On the roof 61 , that is, it is exposed outdoors of the concrete building 6 . The purpose of using concrete building 6 is to provide firm support, and make full use of the heat insulation and sound insulation properties of concrete buildings, to avoid the impact of excessive heat conduction and poor sound insulation effect of metal support structures on the experimental results and the environment.

There is a rectangular opening 62 on the roof 61 , and the opening 62 is sealed and covered by an aluminum plate 63 , that is, the aluminum plate 63 is larger than the opening 62 , and the edge of the aluminum plate 63 is closely attached to the outer surface of the roof 61 . The smoke box 1 is integrally arranged above the aluminum plate 63 and located within the area of the opening 62 . For ease of positioning, before the aluminum plate 63 is installed, corresponding lines 621 have been drawn on the front and back sides of the aluminum plate 63 by comparing the size of the opening 62 in advance, and the line positions on the front and back sides should be the same. The advantage of setting the smoke box 1 above the aluminum plate 63 is that it is convenient to arrange a temperature control structure below the aluminum plate 63, such as the condensing pipe 31 described below, to facilitate heat conduction; Various openings and sealing covers are provided, such as clean air inlet 42 and outlet 43 , personnel inlet and outlet 633 , sampling port 634 , etc. (see FIG. 3 ).

As shown in Figure 3, which shows the detailed structural exploded perspective view of the smoke box 1 and the condensing device in Figure 2, the smoke box 1 is composed of a frame 11 and a smoke box body 12 made of a transparent film supported by it, sunlight The smog box 1 can be irradiated through the smog box body 12 made of transparent film, so that an experimental environment suitable for simulating photochemical pollution can be obtained inside the smog box 1 . In a preferred embodiment, the smoke box body 12 is made of FEP (fluorinated ethylene propylene copolymer) film with good light transmission. The FEP film has a wide range of temperature adaptability, and can withstand common low and high temperature environments without being easily denatured. , can be used in outdoor environment for a long time.

In Fig. 3, the smoke box body 12 is all supported on the inner side of the entire frame 11. Since the smoke box body 12 is transparent, it is difficult to express it through the view, but those skilled in the art should be able to easily according to the text description. understand.

Since the smoke box 1 is exposed outdoors, in order to prevent the smoke box 1 from being damaged by harsh environments such as wind, sand, rain and snow, a protective cover 2 is provided outside the smoke box 1 (omitted in Figure 3, see Figures 2, 4, and 5 ), the protective cover 2 is a foldable fan-shaped structure, which can be folded and contracted during the experiment (Figure 5), exposing the smoke box 1, and can be unfolded and closed when not in the experiment (Figure 4), to cover the smoke box 1 Inside the protective cover 2.

As shown in Figure 3, below the aluminum plate 63 below the smoke box 1, a condensation pipe 31 of the condensing device 3 is provided, and the condensation pipe 31 is connected to a condensing unit (not shown) arranged on the outside of the concrete building 6, and the smoke box 1 A convection mixing fan 32 is also provided inside. Wherein, the condensing pipe 31 , the condensing unit and the fan 32 constitute the entire condensing device 3 , which is used to adjust the ambient temperature in the smoke box 1 and keep the temperature inside the smoke box 1 as uniform as possible.

Before each experiment in the smoke box 1, all the gas in the smoke box 1 needs to be converted into clean air, so as to prevent the existing gas in the smoke box 1 from interfering with the experimental results. Therefore in the outdoor photochemical comprehensive experiment system of the present invention, be provided with the clean air system 4 that can provide clean air, as shown in Figure 3, described clean air system 4 purifies the air, then flows through the smog box by pipeline 41 circulation 1. Clean air inlet 42 and outlet 43 are provided at the bottom to purify the smoke box 1 thoroughly. The clean air system 4 can be a commercially available clean air system, such as the AADCO737 series clean air generation system produced in the United States.

The experimental analysis device 5 is set in the concrete building 6 below the smog box 1 (not shown in the figure), including a gas chromatography-mass spectrometry analyzer, a Fourier infrared analyzer with a long optical path optical absorption cell, and a conventional gaseous pollutant online Analytical equipment such as analyzers, electric mobility particle size spectrometers and chromatographic analyzers with photoion detectors can realize online analysis of conventional gaseous pollutants, trace nitrogen oxides, common organic pollutants and fine particles, And semi-online analysis for volatile organic pollutants. The experimental analysis device 5 is connected with the environment inside the box through the sampling hole on the aluminum plate 63 under the smoke box 1 .

The installation and commissioning method for the condensing device of the outdoor photochemical comprehensive experiment system according to a specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings. , protective cover 2, condensing device 3, clean air device 4 and experimental analysis device 5 are five major parts altogether, wherein said protective cover 2, condensing device 3, clean air device 4 and experimental analysis device 5 are all connected with described smog box 1 respectively connected (Fig. 1), the smoke box 1 is arranged on the roof 61 of a concrete building 6 (Fig. 2), and there is a rectangular opening 62 on the roof 61, and the opening 62 is sealed and covered by an aluminum plate 63, and the smoke box 1 is integrally arranged on Above the aluminum plate 63, and within the range of the opening 62; below the aluminum plate 63 below the smoke box 1, a condensation pipe 31 of the condensation device 3 is provided, and the condensation pipe 31 is connected to the condensation unit arranged on the outside of the concrete building 6, A convection mixing fan 32 is also arranged inside the smoke box 1 .

Wherein, the condensing pipe 31, the condensing unit and the fan constitute the entire condensing device 3, the condensing pipe 31 can be used to adjust the ambient temperature in the smoke box 1, and the fan 32 can make the temperature inside the smoke box 1 mix evenly as soon as possible. In a specific embodiment, there are two fans 32, which can be respectively arranged at the positions of the clean air inlet 42 and the outlet 43, so as to enhance the convection of the clean air when the clean air device 4 is working. It can be seen from the figure that the fan 32 is arranged on a bracket, and the fan 32 is suspended above the clean air inlet 42 and the outlet 43 .

In the present invention, the installation of the condensing device 3 requires that the temperature inside the smoke box 1 be kept as uniform as possible. It is one aspect to use the fan 32 to mix the air. The most important thing is to keep the temperature above the aluminum plate 63 as much as possible through the condensing pipe 31. Consistent, so that there are not enough cooling in some places, and the temperature in some places is too low.

Therefore, the installation and commissioning method of the condensing device 3 of the present invention comprises the following steps:

The aluminum plate is divided into several parts side by side, and each part is provided with an independent condensing pipe 31 and an independent control valve (not shown in the figure), and then all the condensing pipes 31 are connected to the main pipe 33, as shown in the figure Show. In order to facilitate the arrangement of the condensation pipes 31 in different areas, the various openings on the aluminum plate 63, such as the aforementioned clean air inlet 42 and outlet 43, personnel inlet and outlet 633, sampling ports 634, etc., should be evenly distributed as far as possible to avoid condensation pipes 31. Located at the opening position, of course, if necessary, the opening position must be set on the path of the condensation pipe 31, and the condensation pipe 31 should be bent to bypass the corresponding opening position.

In a specific embodiment, in order to increase the contact area between the condensation pipe 31 and the aluminum plate 63 , the condensation pipe 31 has a square cross-section and is arranged close to the aluminum plate. In addition, in order to improve the cooling efficiency of the condensation pipe 31 , the surface of the condensation pipe 31 that is not in contact with the aluminum plate 63 is provided with a heat insulating sleeve.

After the condensing pipe 31 is installed in different areas, the whole condensing device 3 can be debugged, so that the condensing device 3 can accurately control the temperature inside the smoke box 1, so that the temperature in the smoke box 1 can be kept consistent.

Before cooling and commissioning, it is necessary to remove the moisture in the building where the aluminum plate is located, so as to avoid accumulating condensed water on the surface of the condensation pipe 31 and affecting other experimental equipment. Specifically, before turning on the condensing unit for refrigeration and cooling, all openings of the concrete building 6 are closed, and the air conditioner is used to dehumidify the inside of the concrete building 6 . Dehumidification operation until the hygrometer shows that the internal humidity of the concrete building 6 is less than 10%, and then the condensing unit is turned on for refrigeration and cooling, so as to start the formal commissioning work. The steps are as follows:

Open all the valves controlling each condensing pipe 31 to 50% of its opening, turn on the condensing unit for refrigeration and cooling, and turn on the convection mixing fan at the same time;

Set a temperature measuring device on the upper surface of the aluminum plate, after cooling for 1 hour, read the temperature values of each temperature measuring device, and take the average value of the temperature values;

Increase the valve opening at the position where the temperature is higher than A% of the average value by A%; reduce the valve opening at the position where the temperature value is lower than the average value B%; after adjusting in sequence, cool down for 1 Hour. In this step, if the opening value after the valve opening is increased by A% is greater than 100%, it cannot be adjusted to a larger direction, and it is enough to keep the valve at the maximum opening of 100%; similarly, if the valve opening If the opening value after reducing B% is less than 1%, then keep the valve opening at 1%, instead of closing all the valves. If the above extreme situation occurs, it indicates that there is a problem in the layout of the condensation pipe 31 , and it is necessary to readjust the installation position of the condensation pipe 31 and then carry out the commissioning work again.

Repeat the above process, measure the temperature and adjust the opening of the valve until the difference between the temperature and the average value is less than 5%.

So far, the installation and commissioning of the whole condensing device has been completed.

Those skilled in the art should understand that although the present invention is described in terms of multiple embodiments, not each embodiment only includes an independent technical solution. The description in the description is only for the sake of clarity, and those skilled in the art should understand the description as a whole, and understand the present invention by considering the technical solutions involved in each embodiment as being able to be combined with each other to form different embodiments scope of protection.

The above descriptions are only illustrative specific implementations of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the protection scope of the present invention.

Claims (7)

1. The installation and debugging method of the condensing device for the outdoor photochemical comprehensive experiment system comprises five parts, namely a smoke box (1), a protective cover (2), the condensing device (3), a clean air device (4) and an experiment analysis device (5), wherein the protective cover (2), the condensing device (3), the clean air device (4) and the experiment analysis device (5) are respectively connected with the smoke box (1); the smoke box (1) is arranged on a roof (61) of a concrete building (6), a rectangular opening (62) is formed in the roof (61), the opening (62) is covered by an aluminum plate (63) in a sealing mode, and the smoke box (1) is integrally arranged above the aluminum plate (63) and located in the area range of the opening (62); the method is characterized in that a condensation pipe (31) of the condensation device (3) is arranged below an aluminum plate (63) below the smoke box (1), the condensation pipe (31) is connected with a condensation unit arranged outside the concrete building (6), and a convection mixing fan (32) is further arranged inside the smoke box (1), and comprises the following steps:

the aluminum plate is divided into a plurality of parts which are arranged side by side, each part is respectively provided with an independent condensing pipe (31) and an independent control valve, and then all the condensing pipes (31) are connected to a header pipe (33);

all valves for controlling each condensing pipe (31) are opened to 50% of the opening degree of the condensing pipe, a condensing unit is started for refrigerating and cooling, and meanwhile, the convection mixing fan (32) is started;

arranging temperature measuring devices on the upper surface of the aluminum plate, reading the temperature values of the temperature measuring devices after cooling for 1 hour, and averaging the temperature values;

increasing the valve opening by a% at a location where the temperature is above a% of the average value; reducing the valve opening at the position of which the temperature value is lower than the average value B% by B%; after the adjustment, the mixture was cooled for 1 hour.

And repeating the process, measuring the temperature and adjusting the opening of the valve until the difference value between the temperature and the average value is less than 5%.

And the whole condensing device is installed and debugged.

2. A method according to claim 1, characterized in that the condenser tube (31) is of square cross-section and is placed against the aluminium sheet.

3. Method according to claim 2, characterized in that the surface of the condensation duct (31) not contacting the aluminium plate is provided with a thermal insulation jacket.

4. A method according to claims 1-3, characterized in that before turning on the condensing units for cooling, all openings of the concrete building (6) are closed and the interior of the concrete building (6) is dehumidified by means of air conditioning.

5. Method according to claim 4, characterized in that the dehumidification operation is carried out until the hygrometer indicates that the humidity inside the concrete structure (6) is less than 10%, and then the cooling of the condensation unit is carried out.

6. The method of claim 4, wherein if the value of the opening of the valve after a% increase is greater than 100%, then the valve cannot be adjusted in the larger direction and the valve is maintained at 100% maximum opening; and if the opening value of the valve after the opening is reduced by B% is less than 1%, keeping the opening of the valve at 1%, and not closing all the valves.

7. The method as claimed in claim 6, wherein the debugging work is performed again after the installation position of the condensation duct is readjusted in the situation as set forth in claim 6.

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