Fume cupboard flue gas emission system
By installing spray heads and a water pump system in the main flue gas duct, combined with branch pipe design and heat tracing, the problem of acid scale formation in acid mist purification towers and ventilation ducts was solved, achieving safe and reliable flue gas emissions.
Patent Information
- Application Number
- CN202423184868.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In traditional laboratory acid mist purification towers and ventilation ducts, acid mist adheres and forms acid scale, leading to poor smoke exhaust and posing safety hazards. Furthermore, it may spontaneously combust under high temperature or dry conditions, posing a fire risk.
Spray heads are installed inside the flue gas main and connected to water pipes. Water spraying is controlled by a water pump and solenoid valve, and timed water spraying is achieved by combining a time relay. Heat tracing tape is attached to the outside of the water pipe to prevent freezing. The flue gas branch pipes are designed with 90° bends and are inclined to prevent water accumulation. Transparent acrylic panels facilitate observation and cleaning.
It effectively reduces acid mist adhesion, prevents acid scale formation, eliminates safety hazards, prevents water pipes from freezing, and ensures stable system operation.
Smart Images
Figure CN223570336U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of flue gas emission equipment, and particularly relates to a fume hood flue gas emission system. BACKGROUND
[0002] The traditional laboratory acid mist purification tower and ventilation pipeline are used for chemical detection analysis for a long time, and concentrated acid (such as perchloric acid, hydrochloric acid, sulfuric acid, phosphoric acid, etc.) used for sample decomposition can generate smoke into the ventilation pipeline after high-temperature heating, and finally into the acid mist purification tower. For a long time, various acid smog can form acid scale in the ventilation pipeline and the acid mist purification tower and adhere to the inner wall of the ventilation pipeline and the acid mist purification tower, so that the ventilation pipeline is not smooth, and the smoke emission effect is greatly reduced. Too much acid scale can cause the purification tower to be unable to purify all the generated acid mist, so that part of the acid mist is discharged into the air. High temperature or dry weather can cause the acid scale to self-ignite and cause a fire. Therefore, improper handling of the traditional acid mist purification tower and ventilation pipeline can cause safety hazards. Therefore, in order to solve the above problems and safety hazards, a more optimal scheme needs to be provided. SUMMARY
[0003] The utility model provides a fume hood flue gas emission system aiming at the above problems.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] A fume hood flue gas emission system, comprising a flue gas branch pipe in communication with a fume hood, the flue gas branch pipe being in communication with a flue gas main pipe, the end of the flue gas main pipe being connected with an acid mist purification tower, a fan being arranged on the flue gas main pipe close to the acid mist purification tower, a plurality of spray heads being uniformly arranged in the flue gas main pipe, the spray heads being in communication with a water pipe, the water inlet of the water pipe being connected with a water source, a water pump and an electromagnetic valve being arranged on one side of the water pipe close to the water source, the water pump and the electromagnetic valve both being electrically connected with a power supply, a plurality of drainage branch pipes being in communication with the flue gas main pipe, the drainage branch pipes being connected with a drainage main pipe, the end of the drainage main pipe being connected with a liquid storage tank in the acid mist purification tower.
[0006] Further, a heating tape is attached to the part of the water pipe located outdoors, and the heating tape is electrically connected with the power supply.
[0007] Still further, transparent acrylic plates are connected to the two ends of the flue gas main pipe arranged horizontally above the fume hood by screws, so as to observe the internal condition of the flue gas main pipe, and the transparent acrylic plates can be removed for cleaning the flue gas main pipe when necessary.
[0008] Still further, a time relay is arranged between the water pump, the electromagnetic valve and the power supply, so as to realize interval timing of water spraying and save water resources.
[0009] Further, the smoke branch pipe is a 90° elbow pipe to prevent the accumulated water after spraying from flowing into the fume hood from the smoke branch pipe.
[0010] Further, the transverse part of the smoke branch pipe is arranged in an inclined downward manner to further prevent the accumulated water after spraying from flowing into the fume hood from the smoke branch pipe.
[0011] Further, the inclination angle of the transverse part of the smoke branch pipe is 1-3°.
[0012] Compared with the prior art, the utility model has the following advantages:
[0013] In the process of experiment, the utility model atomizes and sprays water in the smoke main pipe, can effectively reduce the adhesion of acid mist, and further eliminate the formation of acid scale on the inner wall of the smoke main pipe, and eliminate the safety hidden trouble caused by the adhesion of acid scale.
[0014] The utility model is attached with a heating band on the water pipe outdoors, can effectively prevent the water pipe from freezing in the cold weather in winter, and cause the atomization spraying to be invalid. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the structural schematic diagram of the utility model;
[0016] Figure 2 It is the assembly schematic diagram of the smoke branch pipe and the smoke main pipe of the utility model;
[0017] In the drawing, smoke branch pipe 1, smoke main pipe 2, acid mist purification tower 3, fan 4, spraying head 5, water pipe 6, water source 7, water pump 8, electromagnetic valve 9, power supply 10, drainage branch pipe 11, drainage main pipe 12, heating band 13, transparent acrylic plate 14, time relay 15. DETAILED DESCRIPTION
[0018] In order to further illustrate the technical scheme of the utility model, the utility model is further illustrated by the following embodiment.
[0019] As Figure 1 , Figure 2As shown, a fume hood fume exhaust system, including with fume hood communication fume branch pipe 1, the fume branch pipe 1 is 90 ° elbow pipe, to prevent the accumulated water after spraying from fume branch pipe 1 into fume hood, the transverse portion of fume branch pipe 1 is arranged in an inclined downward, further prevent the accumulated water after spraying from fume branch pipe 1 into fume hood, the inclination angle of the transverse portion of fume branch pipe 1 is 1-3 °, the fume branch pipe 1 is communicated with fume main pipe 2, the end of fume main pipe 2 is connected with acid mist scrubber 3, fan 4 is arranged on fume main pipe 2 near acid mist scrubber 3, the both ends of fume main pipe 2 are connected with transparent acrylic plate 14 by screw on the transverse setting above fume hood, to facilitate the observation of the internal condition of fume main pipe 2, and when necessary, remove transparent acrylic plate 14 to clean fume main pipe 2, a plurality of spray heads 5 are uniformly arranged in fume main pipe 2, the spray head 5 is communicated with water pipe 6, the water inlet of water pipe 6 is connected with water source 7, water pump 8 and electromagnetic valve 9 are arranged on the side of water pipe 6 near water source 7, the water pump 8 and electromagnetic valve 9 are electrically connected with power supply 10, time relay 15 is arranged between water pump 8, electromagnetic valve 9 and power supply 10, to realize interval timing water spraying, to save water resources, the part of water pipe 6 located outdoors is attached with heating tape 13, the heating tape 13 is electrically connected with power supply 10, a plurality of drainage branch pipes 11 are communicated on fume main pipe 2, the drainage branch pipe 11 is connected with drainage main pipe 12, the end of drainage main pipe 12 is connected with the liquid storage tank in acid mist scrubber 3.
[0020] The main features and advantages of the present application are shown and described above, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.
[0021] In addition, it should be understood that, although the present application is described in the form of embodiments, not every embodiment contains only one independent technical solution, the description of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, the technical solutions in each embodiment can also be combined appropriately to form other embodiments that those skilled in the art can understand.
Claims
1. A fume hood exhaust system, characterized in that: The system includes a flue gas branch pipe (1) connected to a fume hood, the flue gas branch pipe (1) connected to a main flue gas pipe (2), the end of the main flue gas pipe (2) connected to an acid mist purification tower (3), a fan (4) installed on the main flue gas pipe (2) near the acid mist purification tower (3), multiple spray heads (5) evenly arranged inside the main flue gas pipe (2), the spray heads (5) connected to a water pipe (6), the inlet of the water pipe (6) connected to a water source (7), a water pump (8) and a solenoid valve (9) installed on the side of the water pipe (6) near the water source (7), the water pump (8) and the solenoid valve (9) both electrically connected to a power supply (10), multiple drainage branch pipes (11) connected to the main flue gas pipe (2), the drainage branch pipes (11) connected to a main drainage pipe (12), and the end of the main drainage pipe (12) connected to a liquid storage tank in the acid mist purification tower (3).
2. The fume hood exhaust system according to claim 1, characterized in that: A heat tracing cable (13) is attached to the outdoor portion of the water pipe (6), and the heat tracing cable (13) is electrically connected to a power source (10).
3. The fume hood exhaust system according to claim 1, characterized in that: Transparent acrylic plates (14) are connected to both ends of the horizontally arranged flue gas main (2) located above the fume hood by screws, so as to facilitate observation of the internal condition of the flue gas main (2). At the same time, when necessary, the transparent acrylic plates (14) can be removed to clean the flue gas main (2).
4. The fume hood exhaust system according to claim 1, characterized in that: A time relay (15) is installed between the water pump (8), the solenoid valve (9) and the power supply (10) to achieve timed water spraying and save water resources.
5. A fume hood exhaust system according to claim 1, characterized in that: The flue gas branch pipe (1) is a 90° bend to prevent water accumulated after spraying from flowing into the fume hood from the flue gas branch pipe (1).
6. A fume hood exhaust system according to claim 5, characterized in that: The transverse portion of the flue gas branch pipe (1) is inclined downwards to further prevent water accumulated after spraying from flowing into the fume hood from the flue gas branch pipe (1).
7. A fume hood exhaust system according to claim 6, characterized in that: The inclination angle of the transverse portion of the flue gas branch pipe (1) is 1-3°.