Acid gas absorption device in ventilation cabinet for acid boiling in laboratory
By designing an acid gas absorption device in the laboratory fume hood, and using acid-resistant pipes and washing and spraying devices to collect and absorb acid steam, the corrosion problem of fume hood ducts is solved, extending the service life and reducing costs.
Patent Information
- Application Number
- CN202421103894.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In PTA factory laboratories, the fume hood duct shortens its service life due to volatile acidic steam corrosion, and the traditional fume hood material is relatively expensive.
Design an acid gas absorption device in a fume hood for cooking acid in a laboratory, including an air collecting hood, acid-resistant pipe, water tank and washing and spraying device. By collecting and absorbing the acid steam generated during cooking of the electric heating plate, the Corrosion of air ducts.
It effectively reduces the corrosion of acid steam on stainless steel air ducts, extends the service life of air ducts, and reduces costs.
Smart Images
Figure CN222343755U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical analysis, in particular to an acid gas absorption device in a fume hood for acid boiling in a laboratory. Background Art
[0002] In the PTA factory laboratory, the metal determination process in the PTA sample requires the use of high-concentration hydrochloric acid to boil the experimental platinum crucible. During the boiling process, a large amount of hydrogen chloride vapor will evaporate. The hydrogen chloride vapor enters the ventilation duct, causing severe corrosion to it and shortening its service life.
[0003] The materials of the traditional fume hoods in factory laboratories are stainless steel, galvanized steel plates, etc. When using the fume hood to boil volatile acids (such as hydrochloric acid, hydrobromic acid, perchloric acid, etc.), the volatilized hydrochloric acid and other vapors will continuously corrode the ducts and shorten their service life. The use of PP ducts and acid-washing fume hoods is expensive. Utility Model Content
[0004] The utility model provides an acid gas absorption device in a fume hood for acid boiling in a laboratory, which solves the problem that the air duct of the existing fume hood is continuously corroded and the service life is shortened.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] An acid gas absorption device in a fume hood for acid boiling in a laboratory, comprising an air collecting hood arranged above an electric heating plate for boiling acid, wherein the air collecting hood is connected to one end of a first pipe, the other end of the first pipe is connected to a water tank, and a washing spray device is arranged in the water tank; the upper side wall of the water tank is connected to one end of a second pipe, the other end of the second pipe is connected to the fume hood air collecting hood, the fume hood air collecting hood is connected to one end of the fume hood air duct, and the other end of the fume hood air duct is connected to the atmosphere.
[0007] Furthermore, the first pipeline and the second pipeline are made of PCV or PP acid-resistant and corrosion-resistant material.
[0008] Furthermore, the side wall of the water tank is connected to a drain pipe and a water inlet pipe.
[0009] Furthermore, the drain pipe is arranged below the water inlet pipe, and the drain pipe is connected to the fume hood water tank.
[0010] Furthermore, two washing spray devices are arranged in the water inlet pipe inside the water tank, and the washing spray devices are atomizing nozzles.
[0011] Furthermore, the water inlet pipe inside the water tank is arranged at a right angle, the horizontal water inlet pipe is provided with a first washing spray device, and the vertical water inlet pipe is provided with a second washing spray device.
[0012] Furthermore, a valve is arranged on the water inlet pipe.
[0013] The beneficial effects of the utility model are:
[0014] The utility model is provided with two washing spray devices. The acid vapor generated in the process of boiling volatile acids such as hydrochloric acid and hydrobromic acid on the electric heating plate is collected by the gas collecting hood, flows into the water tank through the acid-resistant first pipe, and after being washed and absorbed by the two washing spray devices, is merged into the exhaust pipe of the fume hood through the pipe connected with the fume hood air collecting hood and discharged to the atmosphere, thereby effectively reducing the corrosion of the acid vapor to the stainless steel air duct and extending the service life of the air duct. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 It is the front view of the device of the utility model.
[0017] Figure 2 It is a left view of the device of the utility model.
[0018] Description of Figure Numbers:
[0019] 1. First air collecting hood; 2. First pipeline; 3. Water tank; 4. Second pipeline; 5. Drain pipe; 6. Water inlet pipe; 7. Electric heating plate; 8. Fume hood air collecting hood; 9. Fume hood air duct; 10. Fume hood sink; 11. Washing spray device. DETAILED DESCRIPTION
[0020] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0023] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0024] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0025] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0026] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.
[0027] The utility model provides a technical solution: an acid gas absorption device in a fume hood for acid boiling in a laboratory, such as Figure 1-2 As shown, an acid gas washing and absorption device is designed and installed in the fume hood to reduce the corrosion of the volatile acid vapor to the air duct, including an air collecting hood 1 arranged above the acid beaker on the electric heating plate 7, the air collecting hood 1 is connected to one end of the first pipe 2, the other end of the first pipe 2 is connected to a water tank 3 (PP material), and a washing spray device 11 is arranged in the water tank 3; the upper side wall of the water tank 3 is connected to one end of the second pipe 4, the other end of the second pipe 4 is connected to the fume hood air collecting hood 8, the fume hood air collecting hood 8 is connected to one end of the fume hood air duct 9, and the other end of the fume hood air duct 9 is connected to the atmosphere.
[0028] The side wall of the water tank 3 is connected to a drain pipe 5 and a water inlet pipe 6 , the drain pipe 5 is connected to a fume hood water tank 10 , and a valve is arranged on the water inlet pipe 6 .
[0029] The water inlet pipe 6 inside the water tank 3 is arranged at a right angle, the first washing spray device 11 is arranged on the horizontal water inlet pipe 6 , and the second washing spray device 11 is arranged on the vertical water inlet pipe 6 .
[0030] In the fume hood, the gas collecting hood 1, the first pipe 2 made of acid-resistant material such as PVC or PP, the second pipe 4, the water tank 3 (with two washing spray devices 11 therein), and the fume hood gas collecting hood 8 are connected together by bonding, hot melting, etc., and the negative pressure formed by the high-flow gas near the fume hood gas collecting hood 8 is used as the driving force to make the gas in the entire device flow.
[0031] The acid vapor generated during the cooking of volatile acids such as hydrochloric acid and hydrobromic acid using the electric heating plate 7 is collected by the gas collecting hood 1, flows through the first pipe 2 and the second pipe 4 made of acid-resistant materials such as PVC or PP, enters the water tank 3, and is washed and absorbed by the atomizing nozzles of the two washing spray devices 11, and then flows into the fume hood exhaust duct 9 through the PVC\PP pipe connected to the fume hood gas collecting hood 8 and is discharged to the atmosphere.
[0032] The spraying method is reverse mist spraying of tap water, and dilute alkali solution circulating spray absorption can also be used, but additional driving force is required.
[0033] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. An acid gas absorption device in a fume hood for acid boiling in a laboratory, characterized in that: The invention comprises an air collecting hood (1) arranged above an acid boiling beaker on an electric heating plate (7), wherein the air collecting hood (1) is connected to one end of a first pipe (2), the other end of the first pipe (2) is connected to a water tank (3), and a washing spray device (11) is arranged in the water tank (3); the upper side wall of the water tank (3) is connected to one end of a second pipe (4), the other end of the second pipe (4) is connected to a fume hood air collecting hood (8), the fume hood air collecting hood (8) is connected to one end of a fume hood air duct (9), and the other end of the fume hood air duct (9) is communicated with the atmosphere.
2. The acid gas absorption device in the fume hood for acid boiling in the laboratory according to claim 1 is characterized in that: The first pipeline (2) and the second pipeline (4) are made of PCV or PP acid-resistant and corrosion-resistant material.
3. The acid gas absorption device in the fume hood for acid boiling in the laboratory according to claim 1 is characterized in that: The side wall of the water tank (3) is connected to a drain pipe (5) and a water inlet pipe (6).
4. The acid gas absorption device in the fume hood for acid boiling in the laboratory according to claim 3, characterized in that: The drainage pipe (5) is arranged below the water inlet pipe (6), and the drainage pipe (5) is connected to the fume hood water tank (10).
5. The acid gas absorption device in the fume hood for acid boiling in the laboratory according to claim 3 is characterized in that: Two washing spray devices (11) are arranged in the water inlet pipe (6) inside the water tank (3), and the washing spray devices (11) are atomizing nozzles.
6. The acid gas absorption device in the fume hood for acid boiling in the laboratory according to claim 5, characterized in that: The water inlet pipe (6) inside the water tank (3) is arranged at a right angle, a first washing spray device (11) is arranged on the horizontal water inlet pipe (6), and a second washing spray device (11) is arranged on the vertical water inlet pipe (6).
7. The acid gas absorption device in the fume hood for acid boiling in the laboratory according to claim 3, characterized in that: A valve is arranged on the water inlet pipe (6).