TW201709964A - Aerating device and gas processing system - Google Patents

Abstract

An aerating device and a gas processing system are provided. The aerating device includes a hollow body and a plurality of spheres. The hollow body has a space. A gas source and a tank at two sides of the hollow body are communicated with each other through the hollow body, so that a gas from the gas source can pass through the space and enter into a processed liquid in the tank. The spheres are disposed in the space, wherein the space is filled with the processed liquid. When the gas passes through the space, the spheres are perturbed by the gas and collided to each other in the processed liquid.

Description

Aeration device and process gas system

The present invention relates to a device for increasing the gas-liquid contact area, and more particularly to an aeration device and a process gas system.

There are many processes that emit exhaust gases that contain volatile organic compounds (VOCs) or gas gels, and even contain odors. The general treatment method has different treatment methods according to the concentration range. For example, the volatile organic compounds in the exhaust gas belong to a high concentration, for example, more than 5000 mg/m ^ 3 , which can be treated by condensation recovery method for odor treatment; Organic matter, for example, between 1000 mg/m3 and 5000 mg/m3, which can be subjected to freezing or exhaust gas combustion incineration; medium to low concentrations of volatile organic compounds, for example, approximately 50 mg/m3 to 1000 mg / cubic meter, which can be treated by adsorption, biological methods, or first concentrated reburning incineration.

If the concentration of volatile organic compounds in the exhaust gas is extremely low (but there is still odor), for example less than 50 mg/m3, the handling is quite challenging. For example, if the incineration destruction technology is used, since the exhaust gas has almost no heating value, a large amount of energy must be supplied to raise the exhaust gas, resulting in high processing cost. If low-cost biological treatment technology is adopted, and because the concentration of volatile organic compounds is low, it is impossible to provide sufficient carbon source for microbial growth and metabolism, and additional carbon source must be added, which is difficult to handle and has poor results.

A technology capable of effectively treating such extremely low concentrations of organic exhaust gas, including a gas phase oxidation treatment technique, which is a gaseous strong oxidant directly mixed with exhaust gas such as ozone, but if the carbon and carbon of volatile organic compounds in the exhaust gas are single bonds, Ozone cannot ozonize volatile organic compounds, and it is impossible to further decompose organic matter. general It is a hydrogen radical that decomposes organic matter by reacting ozone and water molecules under ultraviolet excitation to generate strong oxidizing power. In addition, the chemical washing also has a partial treatment effect on the water-soluble or slightly water-soluble organic waste gas, but the volatile organic matter must first be washed into the liquid from the exhaust gas, and then oxidized and decomposed by the oxidant added in the liquid, and is suitable for the odor-containing exhaust gas. The treatment, but it involves the two major controls of quality and reaction.

For such exhaust gas with extremely low concentration of volatile organic compounds, absorption towers such as packed towers, spray towers or laminar towers washed by conventional exhaust gases can exert partial gas-liquid mass transfer effects on water-soluble gases, such as wet exhaust sulfur removal. The device (FGD) can effectively treat sulfur dioxide (SO2) and acidic inorganic components in the exhaust gas. However, it has poor effect on the slightly soluble organic gas, gas glue and odor components, and may have a viscous organic gas glue generated by the exhaust gas cooling, which will not only accumulate and adhere to the absorption tower, but also deteriorate the gas and liquid in the absorption tower. Distribution, will eventually lead to the problem of secondary pollution of odor.

Therefore, it is necessary to provide an aeration device and a treatment gas system to solve the problems of the conventional technology.

The main object of the present invention is to provide an aeration device having a plurality of spheres in a hollow body, the spheres being disturbed by the input gas and colliding in the treatment liquid to cause the gas to form smaller bubbles to increase The contact area of the gas with the treatment liquid further enhances the mass transfer effect, and the adhesive organic gas glue does not accumulate in the aeration device.

A secondary object of the present invention is to provide a process gas system comprising the aeration device described above for systematically treating a gas having volatile organic compounds.

To achieve the above objective, the present invention provides an aeration device comprising: a hollow body and a plurality of spheres. The hollow body has an accommodating space. The two sides of the hollow body are connected to a gas source and a tank body, so that a gas from the gas source passes through the accommodating space and enters a treatment liquid of the tank body. The ball is disposed in the accommodating space, wherein the processing liquid fills the accommodating space, and when the gas passes through the accommodating space, the balls are disturbed by the gas to collide with each other in the processing liquid.

In an embodiment of the invention, the volume of the accommodating space is 20 to 50 cubic centimeters.

In an embodiment of the invention, the number of the spheres is 10 to 20, and the spheres have a diameter of 1 to 5 cm.

In an embodiment of the invention, the hollow body has a slit portion having a plurality of slits for communicating with the groove body.

In an embodiment of the invention, each of the slits has an area of 4 to 10 square centimeters and less than a maximum cross-sectional area of each of the spheres.

To achieve the above other objects, the present invention provides a process gas system comprising: a gas source, at least one tank, and at least one aeration device. The gas source outputs a gas. The tank body is provided with a treatment liquid. The aeration device comprises a hollow body and a plurality of spheres. The hollow body has an accommodating space. The two sides of the hollow body communicate with the gas source and the tank body, so that the gas from the gas source passes through the accommodating space and enters the processing liquid of the tank body. The ball is disposed in the accommodating space, wherein the processing liquid fills the accommodating space, and when the gas passes through the accommodating space, the balls are disturbed by the gas to collide with each other in the processing liquid.

In an embodiment of the invention, a cooling device is further connected to the gas source and the aeration device for cooling the gas.

In an embodiment of the invention, a refilling device is further connected to the tank to supplement the processing liquid in the tank.

In an embodiment of the invention, the treatment liquid comprises at least one of sodium hypochlorite (NaOCl), hydrogen peroxide (H ₂ O ₂ ), and ferric chloride.

In an embodiment of the invention, a post-processing device is further included to communicate with the tank for separating a liquid component from the gas treated by the treatment liquid.

10‧‧‧Aeration device

11‧‧‧ hollow body

12‧‧‧ sphere

13‧‧‧ Gas source

14‧‧‧

14A‧‧‧Slot

14B‧‧‧Slot

20‧‧‧Processing gas system

21‧‧‧Control valve

22‧‧‧Rehydration device

23‧‧‧Drain tank

24‧‧‧Cooling device

25‧‧‧Reprocessing device

111‧‧‧ accommodating space

112‧‧‧Slits

112A‧‧‧Slit

131‧‧‧ pipeline

141‧‧‧ treatment solution

211‧‧‧Control valve

221‧‧‧Water pump

231‧‧‧Control valve

232‧‧‧Water pump

251‧‧‧ windmill

Fig. 1A is a perspective view of an aeration device according to an embodiment of the present invention.

FIG. 1B is a schematic view showing the configuration of an aeration device according to an embodiment of the present invention.

Fig. 1C is a schematic view showing the use of the aeration device of the embodiment of the present invention.

Fig. 2 is a schematic view showing the application of the aeration device of the embodiment of the present invention to a process gas system.

Fig. 3A is a graph showing the experimental results of the experimental examples.

Fig. 3B is a graph showing the experimental results of Comparative Example 1.

Fig. 3C is a graph showing the experimental results of Comparative Example 2.

The above and other objects, features and advantages of the present invention will become more <RTIgt; Furthermore, the directional terms mentioned in the present invention, such as upper, lower, top, bottom, front, rear, left, right, inner, outer, side, surrounding, central, horizontal, horizontal, vertical, longitudinal, axial, Radial, uppermost or lowermost, etc., only refer to the direction of the additional schema. Therefore, the directional terminology used is for the purpose of illustration and understanding of the invention.

1A to 1C, FIG. 1A is a perspective view of an aeration device according to an embodiment of the present invention; FIG. 1B is a schematic view showing a configuration of an aeration device according to an embodiment of the present invention; and FIG. 1C is an embodiment of the present invention. Schematic diagram of the use of the aeration device. The aeration device 10 includes a hollow body 11 and a plurality of spheres 12. The hollow body 11 can be a hollow cylindrical container having an accommodating space 111. In an embodiment, the volume of the accommodating space 111 is 20 to 50 cubic centimeters. A gas source 13 and a tank body 14 are connected to both sides of the hollow body 11. The gas source 13 can be connected to the hollow body 11 through a conduit 131 for transporting a gas. The tank body 14 is mainly used for containing a treatment liquid 141 for treating volatile organic substances in the gas so as to reduce or remove the odor of the gas. In an embodiment, the treatment liquid 141 may include at least one of sodium hypochlorite, hydrogen peroxide, and ferric chloride. One side of the hollow body 11 that communicates with the groove body 14 may have a slit portion 112 having a plurality of slits 112A for communicating with the groove body 14.

The spheroids 12 are disposed in the accommodating space 111. The processing liquid 141 is filled in the accommodating space 111. When the gas passes through the accommodating space 111, the spheroids 12 are disturbed by the gas in the processing liquid 141. Colliding with each other to make the gas A bubble smaller than the original gas is formed to increase the contact area between the gas and the treatment liquid 141, thereby improving the mass transfer effect. Furthermore, since the flow of the treatment liquid 141 is caused by the continuous disturbance of the spheres 12, the adhesive organic gas glue in the gas does not accumulate in the aeration device 10, so that the problems of the prior art can be solved. . In one embodiment, the number of the spheres 12 is 10 to 20, and the diameters of the spheres 12 are 1 to 5 cm. It is worth mentioning that the number of the spheres 12 needs to be considered as the ratio of the spheres 12 to the accommodating space 111, because the mutual movable space of the spheres 12 needs to be retained, so that the gas passes through the accommodating space 111. At this time, the spheres 12 are disturbed by the gas and collide with each other in the treatment liquid 141. In another embodiment, each of the slits 112A has an area of 4 to 10 square centimeters and is smaller than a maximum cross-sectional area of each of the plurality of spheres 12, so that the spheres 12 remain in the accommodating space 111. It is not disturbed by the gas to leave the accommodating space 111.

In an embodiment, the number of the aerators 10 may be plural, for example, 2, 3, 4 or 5, or similar to the 1A and 1B, the plurality of aerators 10 are sequentially parallel. The gas sources 13 are arranged and connected to each other, but are not limited thereto, and each aeration device 10 may be connected to a respective gas source 13 .

Referring to FIGS. 1A, 1B, 1C and 2 together, FIG. 2 is a schematic view showing the application of the aeration device 10 of the embodiment of the present invention to a process gas system 20. The process gas system 20 includes a gas source 13, at least one tank 14 (14A, 14B), and at least one aeration device 10. In an embodiment, the number of the tanks 14 may be two or more. In the case of the two tanks 14A and 14B, if the treatment liquid 141 in the tank body 14A needs to be replaced (for example, depending on the use time, the oxidation-reduction potential of the treatment liquid 141, or the pH value), The output path of the gas outputted by the gas source 13 may be first exchanged through a control valve 211 to cause the gas to enter the tank body 14B, so that the gas continues to be processed in the tank body 14B. When the gas is processed in the tank body 14B, the refilling device 22 (and the water pump 221) that communicates with the tank body 14A can be used to replenish or replace the treatment liquid 141 in the tank body 14A, and discarded. The treatment liquid 141 can be sent to a drain tank 23 through a control valve 231 and a water pump 232. Similarly, if it is in the tank body 14B When the treatment liquid 141 is no longer used or cannot produce an effective treatment effect, the output path of the gas outputted from the gas source 13 is replaced by the control valve 21, so that the gas enters the replaced treatment liquid 141. In the tank body 14A. The treatment liquid 141 in the tank body 14B is then replenished or replaced by the refilling device 22 that communicates with the tank body 14B. In short, the process gas system 20 having two tanks 14A and 14B can continuously treat the gas to improve processing aging.

In one embodiment, the process gas system 20 can include a cooling device 24 coupled to the gas source 13 and the aeration device 10 for cooling the gas. In particular, the gas that is generally required to be treated is usually the exhaust gas that is inevitably or inevitably produced when the product is manufactured in the industry, so in order to comply with environmental regulations or harm to the human body, it needs to be processed before being released to the outside world. Or in the atmosphere. The exhaust gases produced in the manufacture of these industrial products usually have a relatively high temperature, for example between 150 degrees Celsius and 180 degrees Celsius. Therefore, the cooling device 24 can be disposed between the gas source 13 and the aeration device 10 to cool the gas, for example, to a temperature between 40 degrees Celsius and 60 degrees Celsius.

In an embodiment, the process gas system 20 can include a post-treatment device 25. The post-processing device 25 communicates with the tank body 14 (or the tank bodies 14A and 14B) for separating a liquid component from the gas treated by the treatment liquid 141. In detail, after the gas collides with the spheres 12 to form smaller bubbles, the treatment liquid 141 removes or adsorbs some or all of the volatile organic compounds in the gas. After the treatment, the gas is separated from the liquid surface of the treatment liquid 141 and sent to the post-treatment device 25 for removing the treatment liquid 141 (i.e., the liquid component) remaining in the gas. In an embodiment, the aftertreatment device 25 can be in communication with the drain tank 23, and the liquid component can be discharged to the drain tank 23. Further, the gas from which the liquid component has been removed can be discharged to the outside through the windmill 251 of the post-processing device 25.

In order to prove that the aeration device of the embodiment of the present invention can effectively increase the mass transfer effect between gas and liquid. An embodiment and several comparative examples are given as follows.

Example:

First, sodium hypochlorite was supplied as a treatment liquid and placed in a container made of glass. The container bottle has a gas inlet and a gas outlet for a gas to enter and exit. The flow rate of the gas is maintained at 180 standard liters per minute (NL/min), and the total hydrocarbon (THC) concentration in the gas supplied by the gas source is controlled between 8 and 10 ppm (using methane as a calculation standard). An aeration device according to an embodiment of the present invention is provided in the container bottle, and the aeration device communicates with the gas inlet to cause the gas to collide with a plurality of spheres in the aeration device to generate a smaller gas than the original one. The bubbles are separated from the liquid surface by the treatment liquid and are discharged toward the gas outlet. In addition, the examples were carried out for two liquid level experiments, respectively, with heights of 5 cm and 10 cm, respectively.

Comparative Example 1: (Layer method)

First, a container made of glass is provided. The container bottle has a gas inlet and a gas outlet for a gas to enter and exit. The gas flow rate is maintained at 180 standard liters per minute, and the total hydrocarbon concentration in the gas provided by the gas source is controlled between 8 and 10 ppm (using methane as a calculation standard). A porous plate layer is disposed in the container bottle to divide the container bottle into upper and lower portions, and a treatment liquid is sprayed from above the porous plate layer so that the pores of the porous plate layer are covered by the treatment liquid (the treatment liquid The hole is covered by surface tension. Thereafter, a gas line is provided which is connected to the gas source and sequentially passes through the gas inlet and the porous plate layer so that the gas passes through the porous layer from below the porous plate layer. a hole in the plate layer, which is subjected to the treatment liquid to remove hydrocarbons in the gas. Finally, the gas is separated from the container via the gas outlet. In addition, Comparative Example 1 performs two kinds of pore sizes (porous layer The pore size experiment was performed with pore sizes of 3 mm and 5 mm, respectively.

Comparative Example 2: (spray method)

First, a container made of glass is provided. The container bottle has a gas inlet and a gas outlet for a gas to enter and exit. The gas flow rate is maintained at 180 standard liters per minute, and the total hydrocarbon concentration in the gas provided by the gas source is controlled between 8 and 10 ppm (using methane as a calculation standard). A treatment liquid is sprayed from above the container bottle to drip the gas. Finally the gas is detached from the container outlet from the gas outlet. In addition, the sub-example 2 experiments were carried out separately for the two nozzle types, which were respectively sprayable A hollow conical treatment liquid and a solid conical treatment liquid are sprinkled.

When carrying out the examples and Comparative Examples 1 and 2, the total carbon of the gas inlet was simultaneously analyzed by the gas chromatography apparatus of the flame ion detector (Zhongguan Information Co., Ltd.; Taiwan) Standard Test Method (NIEA A723.72B). Hydrogen concentration (C _in ), and total hydrocarbon concentration (C _out ) at the gas outlet. Among them, according to the conservation of mass, the total hydrocarbon reduction of the gas outlet is equal to the total hydrocarbons introduced into the treatment liquid. Therefore, multiplying the total hydrocarbon concentration difference (ie, the difference between C _in and C _out ) at the gas inlet and the gas outlet by the aeration amount (Q), first determine the total mass reduction of the gas phase, and then the total carbon. The mass of the hydrogen compound is divided by the volume (V) of the treatment liquid filled in the container bottle, converted into the theoretical total hydrocarbon concentration (x) in the treatment liquid, and the theoretical total hydrocarbon concentration in the treatment liquid obtained is then plotted against the time axis. Drawing.

Please refer to FIGS. 3A to 3C for the experimental results and the experimental results of Comparative Examples 1 and 2, respectively. It can be seen from Figures 3A to 3C that the experimental example, whether at a liquid level of 5 cm or 10 cm, has approached or reached an equilibrium concentration of 9.0 mg/liter at about 100 minutes (using methane as a calculation standard). From the trend in the experimental results of Comparative Examples 1 and 2, it is apparent that it takes a while for the distance to reach the equilibrium concentration. It can be seen that the aeration device of the embodiment of the invention can effectively increase the mass transfer effect between gas and liquid.

The present invention has been disclosed in its preferred embodiments, and is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

11‧‧‧ hollow body

13‧‧‧ Gas source

14‧‧‧

22‧‧‧Rehydration device

23‧‧‧Drain tank

25‧‧‧Reprocessing device

141‧‧‧ treatment solution

Claims (10)

An aeration device comprising: a hollow body having an accommodating space, the two sides of the hollow body being connected to a gas source and a tank body, so that a gas from the gas source enters the accommodating space a processing fluid in one of the tanks; and a plurality of spheres disposed in the accommodating space, wherein the processing liquid fills the accommodating space, and when the gas passes through the accommodating space, the spheres are disturbed by the gas The treatment liquid collides with each other. The aeration device according to claim 1, wherein the volume of the accommodating space is 20 to 50 cubic centimeters. The aeration device of claim 1, wherein the number of the spheres is 10 to 20, and the spheres have a diameter of 1 to 5 cm. The aeration device of claim 1, wherein the hollow body has a slit portion having a plurality of slits for communicating with the groove body. The aeration device of claim 4, wherein each of the slits has an area of 4 to 10 square centimeters and less than a maximum cross-sectional area of each of the plurality of spheres. A processing gas system comprising: a gas source, outputting a gas; at least one tank body provided with a treatment liquid; and at least one aeration device comprising: a hollow body having an accommodation space, the hollow body Connecting the gas source and the tank body on both sides to allow the gas from the gas source to pass through the accommodating space into the treatment liquid of the tank body; A plurality of spheres are disposed in the accommodating space, wherein the processing liquid fills the accommodating space, and when the gas passes through the accommodating space, the spheres are disturbed by the gas to collide with each other in the processing liquid. The process gas system of claim 6, further comprising a cooling device connecting the gas source and the aeration device for cooling the gas. The process gas system of claim 6, further comprising a refilling device connected to the tank for replenishing the treatment liquid in the tank. The process gas system of claim 6, wherein the treatment liquid comprises at least one of sodium hypochlorite, hydrogen peroxide, and ferric chloride. The process gas system of claim 6, further comprising a post-treatment device connected to the tank for separating a liquid component from the gas treated by the treatment liquid.