CN117189330A - Tail gas purifying device - Google Patents

Abstract

The invention discloses a tail gas purifying device, and relates to the field of tail gas purification. The tail gas purifying device comprises a vortex tube, wherein the inside of the vortex tube comprises a cold end tube and a hot end tube, the cold end tube is connected with the hot end tube through a flange, an opening thread of the hot end tube is connected with a hot end regulating valve, the tail gas purifying device removes a vortex chamber inside the vortex tube, the functions of the vortex chamber and a nozzle are replaced by a flow guiding cavity and a spiral blade, gas enters the hot end tube through a narrow gap between the spiral blades, a high-efficiency catalyst is attached to the inner wall of the hot end tube, when the wall of the hot end tube reaches a certain temperature, the activity of the catalyst is enhanced, the catalytic efficiency is increased, so that the tail gas purifying efficiency is improved, the application field of vortex tube products is mainly cold flow field. The invention is based on the working principle of the vortex tube, and improves the structure of the vortex tube so as to achieve the purpose of treating tail gas.

Description

An exhaust gas purification device

Technical field

The invention relates to the technical field of exhaust gas purification, specifically an exhaust gas purification device.

Background technique

The vortex tube is a new energy separation device that can produce hot and cold airflow at the same time. It mainly uses the vortex effect generated when the air flow rotates at high speed. The working principle of the vortex tube is: the gas enters the vortex tube tangentially from the inlet, expands and rotates at high speed. Since the angular velocity of the outer gas is low, under the action of gas shear force, the angular velocity of the inner gas and the outer gas is tend to be consistent, causing the kinetic energy of the inner layer of gas to decrease and the total temperature to decrease, while the kinetic energy of the outer layer of gas to increase and thus the total temperature to increase, which is manifested in that the outer layer of gas obtains energy from the inner layer of gas through friction. The vortex tube in the prior art generally includes a nozzle, a vortex chamber, a separation orifice plate and hot and cold end tubes. During operation, the compressed gas expands in the nozzle and then enters the vortex chamber along the tangential direction at a very high speed. The airflow rotates at high speed in the vortex chamber, and after vortex transformation, it is separated into two parts of airflow with unequal total temperatures. Under the action of the separation orifice plate, the high-temperature airflow flows out from the hot end tube, and the low-temperature airflow flows out from the cold end tube.

During the use of existing vortex tubes, they are mainly used in the refrigeration industry. Their main function is refrigeration. If the vortex tube is used for exhaust gas emissions, it will be difficult for the vortex tube to purify it because the exhaust gas contains a lot of pollutants. , easy to cause pollution to the environment.

Contents of the invention

In view of the shortcomings of the existing technology, the present invention provides an exhaust gas purification device, which solves the problems raised in the above background technology. In order to achieve the above objects, the present invention is realized through the following technical solutions: an exhaust gas purification device including a vortex tube, the interior of the vortex tube includes a cold end tube and a hot end tube, and the cold end tube is connected to a hot end tube through a flange. The end pipe is connected, the cold end pipe and the spiral blade cavity are connected through a sleeve, the opening of the hot end pipe is threadedly connected with a hot end regulating valve, and the end of the cold end pipe away from the inside of the spiral blade cavity is provided with a cold end pipe. A hot end outlet is provided on the outer surface of the hot end regulating valve, and an air inlet pipe penetrates and is fixedly connected to the outer surface of the spiral blade cavity.

Preferably, the length of the hot end tube is ninety millimeters, the length of the cold end tube is ten millimeters, the diameter of the cold end tube is three millimeters, the diameter of the hot end tube is eight point eight millimeters, and the The exit cross-sectional area of the spiral blade cavity is four by six square millimeters.

Preferably, the cold end tube is sleeved inside the spiral blade cavity, and the catalyst is attached to the wall of the hot end tube.

Preferably, seven spiral blades are evenly distributed inside the spiral blade cavity, and the trajectory of each spiral blade presents a spiral trajectory.

The invention provides an exhaust gas purification device. It has the following beneficial effects: the vortex chamber is removed from the inside of the vortex tube, and the functions of the vortex chamber and nozzle are replaced by the guide chamber and spiral blades. The gas enters the hot end tube through the narrow gap between the spiral blades. At this time, at the exit of the narrow gap blade , the direction of the inlet airflow is along the tangent direction of the hot end tube, and has a certain partial velocity in the axial direction of the hot end tube. Compared with traditional vortex tube products, the flow diversion method can avoid too much pressure loss. , so that a smaller intake pressure can produce a corresponding vortex effect. A high-efficiency catalyst is attached to the inner wall of the hot end tube. When the wall of the hot end tube reaches a certain temperature, the catalyst activity is enhanced and the catalytic efficiency becomes higher, thereby improving exhaust gas purification. Efficiency, the energy input required by the present invention is only high-speed gas flow, and no other forms of energy input are required. Under normal circumstances, the application field of vortex tube products is mainly in the field of cold flow, but the present invention makes full use of the airflow at both ends of the vortex tube and improves the energy utilization rate of the entire system. The present invention is based on the working principle of the vortex tube. The structure has been improved to achieve the purpose of treating exhaust gas.

Description of the drawings

Figure 1 is a schematic diagram of the overall three-dimensional appearance structure of the present invention;

Figure 2 is a schematic cross-sectional structural diagram of the exhaust gas purification device of the present invention;

Figure 3 is a schematic structural diagram of the spiral blade of the present invention;

Figure 4 is a schematic diagram of the high-pressure gas flow structure of the exhaust gas purification device of the present invention;

Figure 5 is a cloud diagram of the simulation experiment data of the present invention;

Figure 6 is a schematic diagram of the cross-sectional position of the cloud diagram of the present invention.

In the picture: 1. Cold end pipe; 2. Spiral blade cavity; 3. Hot end pipe; 4. Hot end regulating valve; 5. Cold end outlet; 6. Hot end outlet; 8. Inlet pipe; 9. Vortex tube .

Detailed ways

As shown in Figures 1-6, the present invention provides a technical solution: an exhaust gas purification device, including a vortex tube 9. The interior of the vortex tube 9 includes a cold end tube 1 and a hot end tube 3. The cold end tube 1 passes through the method The orchid is connected to the hot end pipe 3. The cold end pipe 1 is connected to the spiral blade cavity 2 through a sleeve. The cold end pipe 1 is sleeved inside the spiral blade cavity 2. There are seven evenly distributed inside the spiral blade cavity 2. Spiral blades, and the trajectory of each spiral blade presents a spiral trajectory. The catalyst is attached to the wall of the hot end tube 3, and the condensate settles inside the cold end tube 1. The opening of the hot end tube 3 is threadedly connected with the hot end regulating valve 4, and the spiral The outer surface of the blade cavity 2 is penetrated and fixedly connected with an air inlet pipe 8. The vortex chamber is removed inside the vortex tube, and the functions of the vortex chamber and the nozzle are replaced by the guide chamber and the spiral blades. The gas enters the heat source through the narrow gaps between the spiral blades. End tube 3, the direction of the inlet airflow is along the tangent direction of the hot end tube 3, and has a certain partial velocity in the axial direction of the hot end tube 3. Compared with traditional vortex tube products, the flow diversion method can avoid excessive The large pressure loss causes a corresponding vortex effect to be produced at a smaller intake pressure. A high-efficiency catalyst is attached to the inner wall of the hot end tube 3. When the wall of the hot end tube 3 reaches a certain temperature, the catalyst activity is enhanced and the catalytic efficiency becomes High, thereby improving the exhaust gas purification efficiency. The working medium of the vortex tube 9 is air, and the inlet air temperature is 300k, and the inlet pressure is 0.4Mpa. A temperature separation effect can be observed at the exits at both ends, and the hot end outlet temperature is 313.6 k (the weighted average of the hot end outlet section) and the cold end outlet temperature are 265.2k (the weighted average of the cold end outlet section). The temperatures at both ends are significantly different from the inlet temperature. At this time, the hot port outlet temperature is at e and d, and the temperature of the cold end outlet is between a and b. At the exit of the narrow gap blade, the energy input required by the present invention is only the high-speed gas flow, and no other forms of energy input are required. Under normal circumstances, the application field of vortex tube products is mainly in the field of cold flow, but the present invention makes full use of the airflow at both ends of the vortex tube and improves the energy utilization rate of the entire system. The present invention is based on the working principle of the vortex tube. The structure has been improved to achieve the purpose of treating exhaust gas. The air inlet nozzles of this patent are distributed on the spiral line and are not symmetrical, so the obtained contours are not very regular, but the same paper by SeyedEhsanRafiee and MasoudRahimi on vortex tubes The temperature distribution patterns of the two are similar, which can verify the effectiveness of this patented structure.

When in use, high-heat exhaust gas enters the interior of the device through the air inlet pipe 8, and the high-heat gas enters the spiral blade cavity 2 through the air inlet pipe 8. The gas is guided through the spiral blade area to form a spiral air flow, so that the gas enters along the tangential direction of the hot end pipe 3 Hot end tube 3. The gas inside the hot end tube 3 fully reacts with the catalyst on the inner wall of the hot end tube 3. The pollutants contained in the gas are reduced. Part of the spiral airflow entering the hot end tube 3 is discharged through the hot end outlet 6, and part of the spiral airflow hits the hot end tube 3. The end regulating valve 4 forms a backflow into the cold end pipe 1, and through the vortex tube fluid separation phenomenon, it can be seen that the temperature of the reflux gas decreases, and part of the condensate settles and is discharged from the cold end outlet 5. The hot end is a hot end regulating valve 4. By changing The cross-sectional area of the hot end outlet achieves the purpose of controlling the gas flow at both ends.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed in the present invention, implement the technical solutions of the present invention. Equivalent substitutions or changes of the inventive concept thereof shall be included in the protection scope of the present invention.

Claims (4)

1. An exhaust gas purification device, including a vortex tube (9), characterized in that: the interior of the vortex tube (9) includes a cold end tube (1) and a hot end tube (3), and the cold end tube (3) 1) Connect to the hot end pipe (3) through a flange, the cold end pipe (1) and the spiral blade cavity (2) are connected through a sleeve, and the opening of the hot end pipe (3) is threaded with a hot end Regulating valve (4), the end of the cold end pipe (1) away from the interior of the spiral blade cavity (2) is provided with a cold end outlet (5), and the outer surface of the hot end regulating valve (4) is provided with a hot end The outlet (6), the outer surface of the spiral blade cavity (2) penetrates and is fixedly connected with an air inlet pipe (8). 2. An exhaust gas purification device according to claim 1, characterized in that: the length of the hot end pipe (3) is 90 millimeters, the length of the cold end pipe (1) is 10 millimeters, and the length of the cold end pipe (3) is 90 millimeters. The diameter of the tube (1) is three millimeters, the diameter of the hot end tube (3) is 8.8 millimeters, and the outlet cross-sectional area of the spiral blade cavity (2) is four by six square millimeters. 3. An exhaust gas purification device according to claim 2, characterized in that: the cold end tube (1) is sleeved inside the spiral blade cavity (2), and the wall of the hot end tube (3) Internally attached catalyst. 4. An exhaust gas purification device according to claim 3, characterized in that seven spiral blades are evenly distributed inside the spiral blade cavity (2), and the trajectory of each spiral blade presents a spiral trajectory.