CN-116951616-B - Method for configuring gas hood

Abstract

The invention discloses a using and configuring method of a gas hood, wherein the gas hood is provided with a gas suction port, a contraction section and a gas outlet, the gas suction port is connected with the front end of the contraction section, the contraction section is in a rectangular cone shape which gradually tapers from front to back, the long side of the contraction section is provided with a contraction angle, the gas outlet is connected with the rear end of the contraction section, the gas outlet is connected with a pipeline, the pipeline is further connected with a fan, when a pollution source at the front end of the gas suction port discharges gas pollutant, the gas pollutant is sucked through the gas suction port and then discharged through the gas outlet, the using and configuring method of the gas hood mainly comprises the following steps A. Confirm the range of the gas pollutant of the pollution source and B. Select the angle of the contraction angle, so that the gas pollutant can be effectively discharged, and the power consumption is reduced, so that energy and carbon are saved.

Inventors

• HUANG RONGFANG

Assignees

• 黄荣芳

Dates

Publication Date

20260505

Application Date

20230406

Priority Date

20220427

Claims (1)

1. 1. A method for configuring the air hood used is characterized by comprising an air suction port, a contraction section and an air outlet, wherein the length of the air suction port is L, the width of the air suction port is W, the air suction port is connected with the front end of the contraction section, the contraction section is in a rectangular cone shape which gradually tapers from front to back, the long side of the contraction section is provided with a contraction angle, the air outlet is connected with the rear end of the contraction section, the air outlet is connected with a pipeline, and the pipeline is connected with a fan again, so that when a pollution source at the front end of the air suction port discharges gas pollutants, the gas pollutants are sucked through the air suction port and then discharged outwards through the air outlet, and the method for configuring the air hood used comprises the following steps: A, confirming the range of the gaseous pollutant emission of the pollution source, and B, selecting the angle of the shrinkage angle; Wherein the step A is to confirm the width of the gaseous pollutant emission of the pollution source, and the width corresponds to the long side of the contraction section; wherein (a) when an open-type gas hood having L/W≤5 is used: (i) If the range of emission of the gaseous pollutants in the step A is wide and a relatively uniform speed of the air suction port is required, the angle of the contraction angle is less than or equal to 90 ゚ in the step B; (ii) If the range of emission of gaseous pollutants is concentrated in step a and the amount of inhalation needs to be reduced, then the angle of the contraction angle is selected in step B to be > 90 ゚; Or (b) when using a single slot gas hood with L/W > 5: (i) If the range of emission of the gaseous pollutants in the step A is wide and a relatively uniform speed of the air suction port is required, the angle of the contraction angle is less than or equal to 60 ゚ in the step B; (ii) If the range of emission of the gaseous pollutants is concentrated in this step a and the amount of inhalation needs to be reduced, then the angle of the contraction angle is selected in this step B to be > 60 ゚.

Description

Method for configuring gas hood Technical Field The invention relates to a gas hood using and configuring method, in particular to a gas hood using and configuring method which can effectively remove gas pollutants, reduce power consumption and save energy and carbon. Background The basic type air hood has mainly one air sucking port and one air outlet connected via one contracting section, one pipeline connected to the air outlet and one blower connected to the pipeline. When the pollution source near the air suction port discharges the gas pollutant, the air suction port covers the dispersing area of the gas pollutant, and the suction force of the fan is increased, so that the gas pollutant can be discharged outwards through the air outlet after being sucked through the air suction port. In practical use, although the structure can provide opportunities for exhausting gas pollutants, the gas cover of various types has quite different gas flow characteristics, so that the efficiency of exhausting gas pollutants is reduced under the condition of misusing the gas cover, or the expected exhaust effect can be achieved after the power consumption is greatly increased. Disclosure of Invention Accordingly, it is a primary objective of the present invention to provide a method for configuring an air hood, which is different from the conventional air hood, so as to improve the above-mentioned drawbacks. The invention aims to solve the problems that the efficiency of discharging gas pollutants is reduced or the power consumption is increased due to misuse of the conventional gas hood in actual use, and provides a gas hood using and configuring method which can effectively remove the gas pollutants of pollution sources near an air suction port and reduce the power consumption to save energy and carbon by adopting gas hood types with different shrinkage angles according to the demonstration effect of aerodynamics. The invention provides a method for using and configuring a gas hood, which comprises the steps of connecting a gas suction port with the front end of a contraction section, connecting the contraction section to the rear end of the contraction section, connecting the gas outlet with a pipeline, connecting the pipeline with a fan, and discharging the gas pollutant outwards through the gas outlet after sucking the gas pollutant through the gas suction port when a pollutant source at the front end of the gas suction port discharges the gas pollutant. The method for using and configuring the gas hood mainly comprises the following steps of A, confirming the range of emission of the gas pollutant of the pollution source, and B, selecting the angle of the shrinkage angle. In practice, step a is performed to identify the width of the emission of gaseous pollutants from the pollution source, which corresponds to the long side of the constriction. In practice, the length of the suction port is L, the width of the suction port is W, and the suction port is called an open Hood (open Hood) when L/W is less than or equal to 5, the contraction angle is less than or equal to 90 ゚ in the step B when the range of the gas pollutant emission in the step A is wide and the uniform suction port speed is required, and the contraction angle is > 90 ゚ in the step B when the range of the gas pollutant emission in the step A is concentrated and the suction amount is required to be reduced. In practice, the length of the suction port is L, the width of the suction port is W, and the suction port is referred to as a single Slot Hood (Slot Hood) when L/W > 5, the contraction angle is less than or equal to 60 ゚ in the step B when the range of the gas pollutant emission in the step A is wide and a relatively uniform suction port speed is required, and the contraction angle is > 60 ゚ in the step B when the range of the gas pollutant emission in the step A is concentrated and the suction amount is required to be reduced. For a further understanding of the present invention, the following detailed description of the preferred embodiments is provided in connection with the accompanying drawings and figures, in which the detailed description of the invention and the effects achieved thereby are given. Drawings FIG. 1 is a schematic view of a gas hood according to the present invention. Fig. 2 is a front view of the open Hood (L/w=1.54, α=30 ゚) of the present invention parallel to the long side front view in z=0. Fig. 3 is a side elevation flow field diagram of the open Hood (L/w=1.54, α=30 ゚) of the present invention parallel to the short side at x=0. Fig. 4 is a plan view of the horizontal flow field of the open Hood (L/w=1.54, α=30 ゚) at y=0 (suction port) according to the present invention. Fig. 5 is a front view of the open Hood (L/w=1.54, α=150 ゚) of the present invention parallel to the long side front view in z=0. Fig. 6 is a side elevation flow field diagram of the present invention with open Hood (L/w=1.54, α=150 ゚) parallel to the sho