CN213314185U

CN213314185U - Desorption device is inhaled to simulation VOCs waste gas

Info

Publication number: CN213314185U
Application number: CN202021696412.0U
Authority: CN
Inventors: 崔龙哲; 张梦曦; 王春辉; 向如意; 徐梦; 赵玉凤; 屈勇
Original assignee: South Central University for Nationalities
Current assignee: South Central Minzu University
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-06-01
Anticipated expiration: 2030-08-14

Abstract

A simulation VOCs waste gas adsorbs desorption device includes: the adsorption column is used for allowing the gas mixture to pass through, and an adsorbent used for adsorbing VOCs in the gas mixture is filled in the adsorption column; the weighing unit is used for weighing the weight of the adsorption column in real time; and the digital display monitoring device is connected with the weighing unit and is used for reading and recording the weighing value of the weighing unit.

Description

Desorption device is inhaled to simulation VOCs waste gas

Technical Field

The utility model relates to a gas treatment field particularly, relates to a desorption device is inhaled to simulation VOCs waste gas.

Background

VOCs are acronyms for volatile organic compounds (volatile organic compounds). There are several definitions, for example, the ASTM D3960-98 standard in the United states defines VOCs as any organic compound that can participate in atmospheric photochemical reactions. Definition of the U.S. federal Environmental Protection Agency (EPA): volatile organic compounds are any carbon compounds that participate in atmospheric photochemical reactions, except for CO, CO2, H2CO3, metal carbides, metal carbonates, and ammonium carbonate. The world health organization (WHO, 1989) defines Total Volatile Organic Compounds (TVOC) as a generic term for volatile organic compounds having a melting point below room temperature and a boiling point between 50 and 260 ℃. The definitions of VOC according to the International standards ISO 4618/1-1998 and German DIN 55649-2000 standard in general terms for paints and varnishes are, in principle, any organic liquid and/or solid which spontaneously volatilizes at normal temperature and pressure. In the meantime, the German DIN 55649-2000 standard also defines, in the determination of the VOC content, any organic compound having a boiling point or initial boiling point of less than or equal to 250 ℃ under the usual pressure conditions. Basf corporation then believes that the most convenient and common method is to define which substances belong to the VOC in terms of boiling point, and the most common consensus is that VOCs refer to those chemicals that have a boiling point of 250 ℃ or less.

When the concentration of volatile organic compounds in indoor air is too high, acute poisoning is easily caused, and a light person can have headache, dizziness, cough, nausea, vomiting or a drunk shape; serious patients can have hepatotoxicity and even coma, and some of them can be life-threatening. As for the aspect of air pollution prevention and control, prevention and control of the VOCs become one of the bottlenecks in improving the air quality, the current national VOCs monitoring method system has many aspects which need to be perfected, and although many research institutions and local environment monitoring institutions have good technical bases, conventional monitoring of the atmospheric VOCs is not developed yet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a desorption device is inhaled to simulation VOCs waste gas to solve above-mentioned problem.

The embodiment of the utility model is realized like this: a simulation VOCs waste gas adsorbs desorption device includes: the adsorption column is used for allowing a gas mixture to pass through, and an adsorbent used for adsorbing VOCs in the gas mixture is filled in the adsorption column; the weighing unit is used for weighing the weight of the adsorption column in real time; and the digital display monitoring device is connected with the weighing unit and is used for reading and recording the weighing value of the weighing unit.

Optionally, the adsorption column further comprises a PID detector disposed at an outlet of the adsorption column and connected to the digital display monitoring device, and the PID detector is configured to monitor the concentration of the VOCs at the outlet of the adsorption column and transmit the concentration to the digital display monitoring device.

Optionally, the adsorbent comprises activated carbon.

Optionally, the weighing unit comprises an electronic scale.

Optionally, still include VOCs waste gas generating device and gas mixing device, VOCs waste gas generating device passes through gas mixing device connects the adsorption column.

Optionally, the adsorption column further comprises a heating device, an inlet and an outlet of the heating device are respectively connected with a nitrogen gas source and the adsorption column, and the heating device is used for heating the nitrogen gas.

Optionally, the heating means comprises a heating wire.

Optionally, the nitrogen source comprises a nitrogen cylinder and an air generating device respectively connected to the inlet of the heating device.

Optionally, a drying device is connected in series between the nitrogen cylinder and the heating device.

Optionally, an impurity removing device is connected in series between the drying device and the heating device.

The desorption device is inhaled to simulation VOCs waste gas that this embodiment provided reads and takes notes weighing unit's weighing value through digital display monitoring device. The weighing mass and the VOCs concentration of the weighing unit can be recorded in real time, manual measurement is not needed in the experiment process, the artificial error in the experiment process is avoided, and the experiment accuracy is higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is the embodiment of the utility model provides a desorption device is inhaled to simulation VOCs waste gas's schematic structure diagram.

Icon: 1-an air generating device; 2-nitrogen gas cylinder; 3-a drying device; 4-an impurity removal device; 5-a control valve; 6-mass flow meter; 7-a constant temperature device; 8-VOCs waste gas generating device; 9-a heating device; 10-a thermometer; 11-a gas mixing device; 12-an electronic balance; 13-an adsorption column; 14-PID detection means; 15-digital display monitoring device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the present embodiment provides a simulated VOCs exhaust gas adsorption and desorption apparatus, including: an adsorption column 13, a weighing unit 12 and a digital display monitoring device 15.

Wherein, the adsorption column 13 is used for allowing the gas mixture to pass through, and the adsorption column 13 is internally provided with an adsorbent for adsorbing VOCs in the gas mixture. The adsorbent comprises activated carbon. The adsorption column 13 is placed on the weighing unit 12, and is used for weighing the adsorption column 13 in real time. The digital display monitoring device 15 is connected with the weighing unit 12 and is used for reading and recording the weighing value of the weighing unit 12. The weighing unit 12 includes an electronic scale.

The desorption device is inhaled to simulation VOCs waste gas that this embodiment provided reads and takes notes the weighing value of weighing cell 12 through digital display monitoring device 15. The weighing mass and the VOCs concentration of the weighing unit 12 can be recorded in real time, manual measurement is not needed in the experiment process, the artificial error in the experiment process is avoided, and the experiment accuracy is higher.

Preferably, in this embodiment, the apparatus further includes a PID detector 14 disposed at the outlet of the adsorption column 13 and connected to a digital display monitoring device 15, and the PID detector 14 is configured to monitor the concentration of VOCs at the outlet of the adsorption column 13 and transmit the concentration value to the digital display monitoring device 15. Still include VOCs exhaust gas generating device 8 and gas mixing device 11, VOCs exhaust gas generating device 8 connects adsorption column 13 through gas mixing device 11. Still include heating device 9, nitrogen gas source and adsorption column 13 are connected respectively to heating device 9's import and export, and heating device 9 is used for heating nitrogen gas. The heating means 9 comprise heating wires. The nitrogen source comprises a nitrogen cylinder 2 and an air generating device 1 which are respectively connected with the inlet of the heating device 9. A drying device 3 is connected between the nitrogen cylinder and the heating device 9 in series, and an impurity removing device 4 is connected between the drying device and the heating device 9 in series.

Specifically, the adsorption column 13 is filled with granular activated carbon, and the gas mixture is introduced into the bottom of the column, so that the gas flows upwards through the fixed bed until the bed is saturated in adsorption. The adsorption amount of VOCs is calculated by increasing the mass of the adsorption column 13 on the weighing unit 12, the counting time of the balance is set, and the balance data is transmitted to a computer every 5 minutes. The outlet concentration of VOCs is monitored in real time by the PID detector 14 and data is transmitted into a computer, and redundant waste gas is directly connected to the inlet of a fume hood through a pipeline for centralized treatment, so that the environment is not polluted. An equilibrium state is considered to be reached when the outlet concentration Ct and the inlet concentration C0 are the same and remain for more than one hour. In the desorption process, a resistance wire is adopted to heat nitrogen in the quartz tube, and after the set temperature is reached, the nitrogen is introduced into the fixed bed adsorption column 13 for temperature programmed desorption.

The simulated VOCs waste gas adsorption and desorption device of the embodiment has the following technical effects:

1. the gas mixing device makes the gas more uniform, so that the initial concentration is kept stable.

2. The solid bed dynamic adsorption experiment simulates the actual adsorption process of factory waste gas treatment, finds the optimal condition of mutual selective matching of the active carbon adsorption material and the VOCs, combines basic research data with an actual process, and has engineering application value.

3. The temperature is controllable through hot air desorption, and the optimal desorption temperature for desorbing different VOCs is explored.

4. The digital display monitoring device 15 can record the weighing mass and the VOCs concentration of the weighing unit 12 in real time, manual measurement is not needed in the experimental process, human errors in the experimental process are avoided, and the experimental accuracy is higher.

5. The redundant waste gas is directly discharged into a fume hood for centralized treatment, and the environmental pollution can not be caused.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a desorption device is inhaled to simulation VOCs waste gas which characterized in that includes:

the adsorption column is used for allowing a gas mixture to pass through, and an adsorbent used for adsorbing VOCs in the gas mixture is filled in the adsorption column;

the weighing unit is used for weighing the weight of the adsorption column in real time; and

and the digital display monitoring device is connected with the weighing unit and is used for reading and recording the weighing value of the weighing unit.

2. The device for adsorbing and desorbing waste gas containing analog VOCs as claimed in claim 1, further comprising a PID detector disposed at the outlet of said adsorption column and connected to said digital display monitor, wherein said PID detector is configured to monitor the concentration of VOCs at the outlet of said adsorption column and transmit the concentration to said digital display monitor.

3. The simulated VOCs exhaust gas adsorption and desorption apparatus of claim 1, wherein the adsorbent comprises activated carbon.

4. The simulated VOCs exhaust gas absorption and desorption device of claim 1, wherein the weighing unit comprises an electronic scale.

5. The simulated VOCs waste gas adsorption and desorption device of claim 1, further comprising a VOCs waste gas generation device and a gas mixing device, wherein the VOCs waste gas generation device is connected with the adsorption column through the gas mixing device.

6. The simulated VOCs exhaust gas adsorption and desorption device of claim 5, further comprising a heating device, wherein the inlet and the outlet of the heating device are respectively connected with a nitrogen source and the adsorption column, and the heating device is used for heating nitrogen.

7. The simulated VOCs exhaust gas adsorption and desorption device of claim 6, wherein the heating device comprises a heating wire.

8. The simulated VOCs exhaust gas absorption and desorption device of claim 6, wherein the nitrogen source comprises a nitrogen cylinder and an air generating device which are respectively connected with the inlet of the heating device.

9. The simulated VOCs exhaust gas adsorption and desorption device of claim 8, wherein a drying device is connected in series between the nitrogen cylinder and the heating device.

10. The simulated VOCs exhaust gas adsorption and desorption device of claim 9, wherein an impurity removal device is connected in series between the drying device and the heating device.