CN217211724U

CN217211724U - But gas-solid separation's atmosphere pollutant collection system

Info

Publication number: CN217211724U
Application number: CN202123162524.5U
Authority: CN
Inventors: 李凌; 刘源; 陈建民
Original assignee: Fudan University
Current assignee: Fudan University
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-08-16
Anticipated expiration: 2031-12-15

Abstract

The utility model belongs to the technical field of the atmospheric aerosol gathers, specifically be a but gas-solid separation's atmosphere pollutant collection system. The device comprises: the device comprises an erosion device, an aerosol moisture absorption long cavity, a heating furnace and an aerosol collision collector; the working process is as follows: the original atmosphere enters the corrosion device to absorb relevant gas in the atmosphere, and the particulate matters are not influenced; then enters an aerosol moisture absorption long cavity; the heating furnace provides saturated steam pressurized water vapor to enter the aerosol moisture absorption long cavity, the saturated steam pressurized water vapor in the aerosol moisture absorption long cavity is combined with an atmospheric sample, so that aerosol particles in the atmosphere absorb supersaturated steam to increase the particle size, aerosol liquid drops are formed under the condensation action, and the liquid drops collide in the aerosol collision collector under the action of inertia force; and finally collected. The device has high collection efficiency, can be used together with automatic sample introduction and continuous analysis equipment, and is convenient for subsequent on-line continuous analysis.

Description

But gas-solid separation's atmosphere pollutant collection system

Technical Field

The utility model belongs to the technical field of the atmospheric aerosol gathers, specifically be but gas-solid separation's atmospheric pollution thing collection system.

Background

The atmospheric aerosol is a stable mixed system composed of solid particles and liquid particles uniformly dispersed in the atmosphere. They can be used as condensation nucleus of water drops and ice crystals, absorber and scatterer of solar radiation, and play important roles of balancing sea-land ecosystem, regulating environmental factor and promoting nutrient circulation, and at the same time, they are also an important component of geochemical circulation, and provide an important reaction medium for atmospheric multiphase reaction, and are an important component of atmosphere. The atmospheric aerosol has small particle size, is rich in a large amount of toxic and harmful substances, has long retention time in the atmosphere and long transmission distance, and thus, is not negligible to human health and atmospheric environmental quality.

In recent years, the influence of the atmospheric aerosol directly or indirectly causes the rapid increase of the diagnosis rate of residents and the early death of susceptible people. Particularly, toxic and harmful chemical components carried by haze aerosol particles seriously affect the health of people, and cause high social attention. There has been a great deal of epidemiological evidence that atmospheric aerosols have both acute and chronic health effects. High-concentration aerosol exposure can increase the risk of suffering from acute respiratory diseases and cardiovascular and cerebrovascular diseases, and can induce chronic diseases such as lung cancer, COPD (chronic obstructive pulmonary disease), cardiovascular and cerebrovascular diseases and the like, and influence the immune system, the nervous system and the like of a human body.

As the hot spot and the key point of current scientific research, the physical and chemical characteristic analysis of the atmospheric aerosol at home and abroad is still mainly carried out by sending the atmospheric aerosol into a laboratory for off-line analysis in an artificial membrane sampling mode at present. This sampling-analysis method has more significant drawbacks: (1) a large amount of labor cost is consumed in the pretreatment and sampling processes of membrane sampling, and a laboratory worker can cause the loss of a sampling membrane due to various irresistible factors in the experimental process; (2) during the freezing storage process of the sampling membrane, the total mass of the atmospheric aerosol on the surface of the membrane is more or less lost along with the change of the external environmental conditions, the physicochemical components of the atmospheric aerosol are also changed, and particularly, the oxidation active species are instantaneously extinguished; (3) in the off-line analysis process, due to the loss of samples caused by factors such as personnel operation, system errors and the like, certain result errors are generated, and the result errors are not consistent with actual observation results.

For filling above-mentioned technical blank, the utility model discloses develop the atmospheric aerosol continuous collection system of the gas-solid separation under the saturated vapor pressure condition, can realize online continuous atmospheric aerosol sampling stage, the erosion device that it possessed makes gaseous phase and solid phase atmospheric aerosol separation to make solid phase atmospheric particulates independently get into the liquid phase environment under the saturated vapor pressure condition. The device can be used together with an automatic sampling device and a continuous analysis device on the premise of ensuring the quality control of data, so that the realization of the on-line artificial intelligent atmospheric aerosol sampling and analysis in the future becomes possible, and the device can be widely applied to environment monitoring and health risk assessment.

Disclosure of Invention

An object of the utility model is to provide a but air pollution thing collection system of gas-solid separation.

The utility model provides an but air pollution thing collection system at gas-solid separation, its structure is seen as referring to figure 1 and is shown, include:

the corrosion device is of a double-layer cylinder structure, is driven by a motor to rotate ceaselessly, and is covered with a thin liquid film on the inner side of the cylinder, which is mainly used for absorbing soluble gas substances; an absorption liquid inlet and an absorption liquid outlet are arranged at the lower end of the corrosion device, and absorption liquid enters the corrosion device from the absorption liquid inlet to absorb soluble gas components and then flows out from the absorption liquid outlet to be collected; here, the absorption liquid corresponding to the gas component to be collected is selected according to the gas component to be collected, so that a specific gas component can be collected; while the particles in the gas are not affected.

The aerosol moisture absorption long cavity has a main body structure of a cylindrical stainless steel pipe and is used for aerosol moisture absorption and growth; an aerosol inlet is arranged at the front end of the aerosol moisture absorption long cavity; condensation pipes are respectively arranged on the outer sides of the front end and the rear end of the long aerosol moisture absorption cavity and are used for condensing water vapor entering the long aerosol moisture absorption cavity, and redundant steam condensate water is discharged from a steam condensate water outlet; the inlet of the aerosol moisture absorption long cavity is connected with the outlet of the erosion device;

the heating furnace is communicated with the front end inlet of the aerosol moisture absorption long cavity through a steam nozzle and is used for providing saturated steam for the aerosol moisture absorption long cavity 6;

the inner structure of the aerosol collision collector is conical, and the aerosol collision collector is communicated with the rear end outlet of the aerosol moisture absorption long cavity; the upper end of the aerosol collision collector is connected with an air pump connector, the side surface of the aerosol collision collector is connected with a distilled water inlet, and an aerosol collecting liquid outlet is arranged below the aerosol collision collector; the aerosol collision collector is used for collecting the aerosol in a collision way;

the air pump interface is used for connecting an air pump, and the air pump provides power for the device to work;

the distilled water inlet is used for introducing distilled water into the aerosol collision collector;

furthermore, the aerosol moisture absorption long cavity is divided into a front section and a rear section which are connected through a clamping hoop; the front end port of the aerosol collision collector is fixedly connected with the aerosol inlet through a clamp, and the rear end port of the aerosol collision collector is fixedly connected with the aerosol inlet through a screw; the middle part is fixed on the bottom plate by a fixed bracket; the above components are all mounted on the base plate.

Further, the liquid in the corrosion device is coated on the inner side of the corrosion device along with the rotation of the corrosion device, the absorption liquid on the inner side is continuously replaced and updated as the corrosion device rotates continuously, and the absorption liquid after absorbing gas can be further detected through ion chromatography after being collected.

The device carries out continuous sampling of atmospheric aerosol on a real atmospheric sample, and the flow is as follows: the original atmosphere sample enters a corrosion device to absorb soluble gas substances in the original atmosphere; then enters the aerosol moisture absorption long cavity through the aerosol inlet; deionized water is heated by a heating furnace to form saturated steam and pressurized steam, the saturated steam and pressurized steam enter the aerosol moisture absorption long-growing cavity through a steam nozzle, the saturated steam and pressurized steam are combined with an original atmospheric sample in the aerosol moisture absorption long-growing cavity, aerosol particles in the atmosphere absorb supersaturated steam, the particle size of the aerosol particles is increased, aerosol droplets are formed under the condensation action, and the droplets collide in an aerosol collision collector under the action of inertia force; and the mixed gas is mixed with distilled water entering from a distilled water inlet, generates spiral motion, and finally enters an aerosol collecting liquid outlet to be collected.

The working principle of the device is as follows: when an atmospheric sample flows through the corrosion device, soluble gaseous substances in the atmosphere are absorbed by a liquid film on the inner surface of the corrosion device, and the absorption liquid absorbs soluble gas components and then is conveyed into a collection bottle by a peristaltic pump or is connected with other devices for detection; the particles are hardly affected and enter the aerosol moisture absorption long cavity. The particle size increases and forms the aerosol liquid drop under the condensation after the aerosol particle absorbs supersaturated steam, and the liquid drop collides and is collected in the aerosol collision collector under the effect of inertia, and then is transported to the collecting bottle by the peristaltic pump or is connected with other devices for detection.

The beneficial effects of the utility model reside in that:

(1) the device can realize gas-solid separation for collecting atmospheric aerosol samples, and further realize the respective collection of gas pollutants and particle pollutants in the atmosphere;

(2) each part of the device can be detached independently, and the device is easy to maintain;

(3) the device can be used together with automatic sample introduction and continuous analysis equipment, so that the on-line continuous analysis can be conveniently completed subsequently;

(4) the device is simple and convenient to operate, reliable and effective.

Drawings

FIG. 1 is a schematic diagram of an atmospheric pollutant collecting device capable of gas-solid separation.

Reference numbers in the figures: 1 is the aspiration pump interface, 2 is aerosol collision collector, 3 is rearmounted condenser pipe, 4 is the export of aerosol collection liquid, 5 is the clamp, 6 is the long chamber of aerosol moisture absorption, 7 is leading condenser pipe, 8 is the export of steam condensate water, 9 is the support, 10 is the clamp, 11 is the heating furnace, 12 is the steam gas outlet, 13 is the steam water supply entry, 14 is the corrosion apparatus, 15 is the absorption liquid export, 16 is the absorption liquid entry, 17 is the bottom plate, 18 is the aerosol entry, 19 is the distilled water entry.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example 1:

in the process of continuously sampling and detecting atmospheric aerosol of a real atmospheric sample by using the device, the original atmospheric sample firstly enters the erosion device 14, the erosion device 14 continuously rotates under the driving of a motor, the lower end of the erosion device is connected with the absorption liquid bottle 16, absorption liquid is injected into the erosion device 14 from the absorption liquid bottle 16 through the peristaltic pump, a thin absorption liquid film covers the inner side of the erosion device 14, and when the atmospheric sample flows through the erosion device 14, soluble gas components in the atmosphere can be absorbed by the absorption liquid and flow out from the absorption liquid outlet 15 under the action of the peristaltic pump to enter other detection devices or be collected; atmospheric particulate components will pass through the erosion vessel 14 into the aerosol inlet 18; the aerosol inlet 18 is made of stainless steel and is connected with the side surface through a steam nozzle 12, the steam nozzle 12 is a stainless steel pipe, distilled water enters the heating furnace 11 through a steam water supply inlet 13, and generated steam enters the aerosol inlet 18 through the steam nozzle 12; the water vapor and the entering aerosol particles are mixed in the aerosol moisture absorption long cavity 6, and the particles absorb moisture and grow in the aerosol moisture absorption long cavity 6; the aerosol moisture absorption long cavity 6 has a main body structure of a cylindrical stainless steel pipe and is a place where the aerosol moisture absorption is long; the aerosol inlet 12 is positioned at the inlet of the front end of the aerosol moisture absorption long cavity 6; the two ends of the long aerosol moisture absorption cavity 6 are respectively provided with a condensing pipe 3 and a condensing pipe 7 which are used for condensing water vapor entering the long aerosol moisture absorption cavity; the aerosol moisture absorption long and large cavity 6 is divided into two sections, the front end of the aerosol moisture absorption long and large cavity is fixedly connected with an aerosol inlet 18 through a hoop 10, the rear end of the aerosol moisture absorption long and large cavity is fixedly connected with the aerosol collision collector 2 through a screw, the two sections of the aerosol moisture absorption long and large cavities 6 are connected through a hoop 5, and the middle of the aerosol moisture absorption long and large cavity 6 is fixed on a bottom plate 17 through a fixing support 9; the air pump interface 1 is connected with an air pump and used for providing power so that aerosol enters the aerosol collision collector 2; the inner structure of the aerosol collision collector 2 is conical, the upper end of the aerosol collision collector 2 is connected with the air pump connector 1 and used for being connected with an air pump to provide power, the side surface of the aerosol collision collector 2 is connected with the distilled water inlet 19, the entering aerosol particles collide on the aerosol collision collector 2 and are mixed with the distilled water entering from the distilled water inlet 19 to generate spiral motion, and finally the aerosol particles enter the aerosol collection liquid outlet 4 and are collected, so that the collection of the particulate matters in the atmosphere is realized. The whole process is powered by the air pump through the air pump interface 1.

With (NH) ₄ ) ₂ SO ₄ The solution is used as generating liquid and is generated under the action of an aerosol generator (NH) ₄ ) ₂ SO ₄ The aerosol is used for simulating the aerosol in the atmosphere, so that the collection efficiency of the device is detected.

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Claims

1. An atmospheric pollutant collecting device capable of gas-solid separation, which is characterized by comprising:

the corrosion device (14) is of a double-layer cylinder structure, is driven by a motor to rotate continuously, and the inner side of the cylinder is covered with a thin liquid film for absorbing soluble gas substances; an absorption liquid inlet (16) and an absorption liquid outlet (15) are arranged at the lower end of the corrosion device, and absorption liquid enters the corrosion device (14) from the absorption liquid inlet (16) to absorb soluble gas components and then flows out from the absorption liquid outlet (15) to be collected; here, the absorption liquid corresponding to the gas component to be collected is selected according to the gas component to be collected, so that a specific gas component can be collected; the particles in the gas are not affected;

the aerosol moisture absorption long cavity (6) has a main body structure of a cylindrical stainless steel pipe and is used for aerosol moisture absorption and growth; an aerosol inlet (18) is arranged at the front end of the aerosol moisture absorption long cavity (6); condensation pipes (3, 7) are respectively arranged on the outer sides of the front end and the rear end of the aerosol moisture absorption long cavity (6) and are used for condensing water vapor entering the aerosol moisture absorption long cavity, and redundant steam condensate water is discharged from a steam condensate water outlet (8); the inlet of the aerosol moisture absorption long cavity is connected with the outlet of the erosion device (14);

the heating furnace (11) is communicated with the front end inlet of the aerosol moisture absorption long cavity (6) through a steam nozzle (12) and is used for providing saturated steam for the aerosol moisture absorption long cavity (6);

the inner structure of the aerosol collision collector (2) is conical, and the aerosol collision collector (2) is communicated with the outlet at the rear end of the aerosol moisture absorption long cavity (6); the upper end of the aerosol collision collector (2) is connected with an air pump connector (1), the side surface of the aerosol collision collector is connected with a distilled water inlet (19), and an aerosol collection liquid outlet (4) is arranged below the aerosol collision collector; the aerosol collision collector (2) is used for collecting aerosol in a collision way;

the air pump interface (1) is used for connecting an air pump, and the air pump provides power for the device to work;

and the distilled water inlet (19) is used for introducing distilled water into the aerosol collision collector (2).

2. The atmospheric pollutant collecting device capable of gas-solid separation according to claim 1, wherein the long aerosol moisture absorption cavity (6) is divided into a front section and a rear section, and the two sections are connected through a clamping hoop; the front end port of the aerosol collision collector is fixedly connected with the aerosol inlet (18) through a hoop, and the rear end port of the aerosol collision collector is fixedly connected with the aerosol collision collector (2) through a screw; the middle of the bracket is fixed on a bottom plate (17) by a fixed bracket (9); the heating furnace (11) is also mounted on the bottom plate (17).