Radial rotational flow adjustable tail gas recovery jetting device

Abstract

The utility model relates to a radial rotational flow adjustable tail gas recovery jetting device, which belongs to the technical field of tail gas recovery equipment and comprises a main sleeve, a gas inlet sleeve, a radial rotational flow component, a first axial gas inlet pipe, a second radial gas inlet pipe, a protective sleeve and a sleeve nozzle. According to the design, a nested structure is adopted, a power source of the second-stage ejector is arranged in an outer jacket of the first-stage ejector, the cooling capacity of a throat pipe of the first-stage ejector can be effectively taken away, the heat preservation effect is achieved, and the heat preservation effect is achieved. Heating and dewatering devices can be omitted, so that the cost is reduced; the nested structure reduces the assembly difficulty and the size of the device; and through the radial rotational flow part, the power gas pressure can be adjusted under the condition that the working state of the ejector is not influenced, the flow speed of the nozzle is ensured to be supersonic speed, and the ejector can work normally.

Description

Technical Field

[0001] The utility model belongs to the technical field of tail gas recovery equipment, and in particular relates to a radial swirl adjustable tail gas recovery injection device. Background Art

[0002] In the process of industrial production, various exhaust gases are often generated. If these exhaust gases are directly discharged, it will not only cause energy waste, but also pollute the environment. Therefore, the recycling and utilization of exhaust gases is of great significance for energy conservation and environmental protection.

[0003] At present, two-stage series ejectors are widely used in commonly used exhaust gas recovery devices. However, there are some problems with traditional two-stage series ejectors during use: when natural gas passes through the nozzle, it will undergo a pressure reduction process. During this process, the medium in the ejector will experience a temperature drop of 20-30°C. At the same time, since the ejector itself is a vacuum pumping device, the exhaust gas natural gas being pumped usually contains moisture. The decrease in vacuum degree will cause the moisture in the exhaust gas natural gas to flash evaporate, and the flash evaporate further absorbs heat, causing the temperature at the throat of the ejector to drop. In winter, ice is prone to occur, thereby blocking the ejector and causing the ejector to fail.

[0004] In order to solve the above-mentioned icing problem, it is generally necessary to additionally install a heating device and a water removal device in the system, which not only increases the one-time investment cost of the equipment, but also increases the energy consumption during operation, which is not conducive to energy conservation and environmental protection; and the traditional two-stage series ejector structure is relatively complex and difficult to assemble. For this reason, the utility model provides a radial swirl adjustable exhaust gas recovery injection device. Utility Model Content

[0005] The purpose of the utility model is to provide a radial swirl adjustable exhaust gas recovery injection device, which can solve the problems raised by the above background technology.

[0006] The technical solutions adopted by this utility model are as follows:

[0007] A radial swirl adjustable exhaust gas recovery and injection device comprises a main sleeve and an intake sleeve sealed at one end of the main sleeve, a radial swirl component embedded in the middle of one end of the intake sleeve, a central axial inlet end of the radial swirl component communicating with a first axial inlet pipe, and a central axial outlet end of the radial swirl component extending into the interior of the intake sleeve, and a second radial inlet pipe further communicating with the radial swirl component;

[0008] A protective sleeve is provided at one end of the main sleeve adjacent to the air inlet sleeve, a sleeve nozzle is provided at the other end of the protective sleeve, a first-stage ejector is installed inside the protective sleeve, the air inlet end of the first-stage ejector passes through the main sleeve and is connected to the interior of the air inlet sleeve, and a first-stage nozzle at the other end of the first-stage ejector passes through the protective sleeve and is connected to the interior of the main sleeve;

[0009] A secondary injector is embedded in one end of the main sleeve, the air inlet end of the secondary injector is located inside the main sleeve and corresponds to the sleeve nozzle, and the other end of the secondary injector extends outside the main sleeve and is respectively provided with an exhaust port and a return port.

[0010] The present invention is further configured as follows: the axial air outlet end of the radial swirl component is located inside the air inlet sleeve, corresponds to the air inlet end of the first-stage ejector and is in communication with each other.

[0011] The utility model is further configured as follows: a third air inlet pipe is also provided on the main sleeve, one end of the third air inlet pipe passes through the main sleeve and is connected to the inside of the protective sleeve, and the protective sleeve is connected to the main sleeve and the air inlet end of the secondary injector through the sleeve nozzle.

[0012] The utility model is further configured as follows: the radial swirl component includes an inner tube and an outer tube, an adjustment chamber is formed between the outer wall of the inner tube and the inner wall of the outer tube, and sealing end plates are provided at both ends of the adjustment chamber between the inner tube and the outer tube;

[0013] A slidable adjusting slider is provided in the adjusting chamber. The adjusting slider is an annular structure. One side of the adjusting slider is provided with a plurality of springs in an annular array. The other end of the spring is fixed to the sealing end plate.

[0014] The utility model is further configured as follows: a plurality of groups of radial air holes are arranged in an array in the middle of the surface of the inner tube, each group of radial air holes is distributed in an annular shape on the surface of the inner tube, and the radial air holes are arranged in an inclined shape on the surface of the inner tube;

[0015] One end of the second radial air inlet pipe passes through the outer pipe and extends into the adjustment chamber.

[0016] The utility model is further configured as follows: the air intake sleeve is further provided with an exhaust gas inlet, and the exhaust gas inlet is connected to an exhaust gas inlet pipe.

[0017] The utility model is further configured as follows: the reflux port is connected to a reflux pipe, the reflux pipe is provided with a reflux valve, and the other port of the reflux valve is connected to the tail gas inlet pipe through a pipeline.

[0018] The technical effects achieved by this utility model are:

[0019] The utility model discloses a radial swirl adjustable exhaust gas recovery injection device, which integrates the first-stage injector and the second-stage injector with the main casing to form a nested structure, which can reduce the assembly difficulty and volume of the injectors, making the device more compact and convenient for installation and use. Secondly, the power natural gas or steam of the second-stage injector is arranged in the external main casing of the first-stage injector. Since the amount of natural gas or steam on the power side is 5-10 times the amount to be pumped, and the temperature is higher than that of the pumped gas, it can effectively take away the coldness of the throat of the first-stage injector, and play a role in heat preservation. Through this structure, the heating device can be eliminated, reducing costs. At the same time, since there is no freezing, the pumped exhaust gas or exhaust steam does not need to be specially dehydrated.

[0020] The utility model discloses a radial swirl adjustable exhaust gas recovery injection device, which adds a radial swirl component to the first-stage injector. As the pressure increases, the spring will be compressed, thereby increasing the air intake. Since the radial air holes are lateral air intake, the greater the spring compression, the more radial air holes of the swirl, and the greater the radial air intake, thereby causing the power gas to rotate, increasing the kinetic energy in the radial direction and reducing the axial kinetic energy, thereby playing a role in regulating the power gas pressure. Moreover, this adjustment method will not affect the working state of the injector, and can ensure that the flow rate of the nozzle is supersonic, so that the injector remains in normal working condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the overall structural principle diagram of the utility model;

[0022] Figure 2 It is a cross-sectional view of the radial swirl component in the utility model;

[0023] Figure 3 This is a principle diagram of the present invention when the radial gas pressure is not increased in the radial swirl component;

[0024] Figure 4 This is a schematic diagram of the principle of the radial gas pressure increasing in the radial swirl component of the present invention;

[0025] Figure 5 This is a schematic diagram of the distribution of radial air holes on the inner tube of the utility model.

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] 1. First axial air inlet pipe; 2. Second radial air inlet pipe; 3. Third air inlet pipe; 4. Radial swirl component; 41. Inner pipe; 42. Outer pipe; 43. Adjustment chamber; 44. Adjustment slider; 45. Spring; 46. Radial air hole;

[0028] 5. Inlet sleeve; 51. Exhaust inlet; 6. First-stage ejector; 61. Protective sleeve; 62. First-stage nozzle; 63. Sleeve nozzle; 7. Second-stage ejector; 8. Main sleeve; 71. Exhaust port; 72. Return port; 73. Return valve; 74. Return pipe. DETAILED DESCRIPTION

[0029] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation methods of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0030] like Figure 1 As shown, a radial swirl adjustable exhaust gas recovery injection device includes a main sleeve 8 and an air intake sleeve 5 sealed and installed at one end of the main sleeve 8. The air intake sleeve 5 is also provided with an exhaust gas inlet 51, and the exhaust gas inlet 51 is connected to a exhaust gas inlet pipe for introducing the exhaust gas to be recovered. The exhaust gas inlet pipe can be externally connected to transport sulfur-containing natural gas exhaust, and a control valve is also provided at the inlet end of the exhaust gas inlet pipe.

[0031] like Figure 1 As shown, a radial swirl component 4 is embedded in the middle of one end of the air inlet sleeve 5, and the middle axial air inlet end of the radial swirl component 4 is connected with the first axial air inlet pipe 1, and the middle axial air outlet end of the radial swirl component 4 extends into the interior of the air inlet sleeve 5. The radial swirl component 4 is embedded in one end of the air inlet sleeve 5 and fixed by bolts, and the connection is sealed by a sealing ring. The axial air outlet end of the radial swirl component 4 is located inside the air inlet sleeve 5, corresponding to the air inlet end of the first-stage ejector 6 and connected with each other, ensuring that the gas can smoothly enter the first-stage ejector 6, wherein the high-pressure natural gas entering the first axial air inlet pipe 1 enters from the axial air inlet end of the radial swirl component 4, and is discharged from the axial air outlet end in the air inlet sleeve 5 into the air inlet end of the first-stage ejector 6;

[0032] like Figure 2-4As shown, the radial swirl component 4 includes an inner tube 41 and an outer tube 42, and an adjustment chamber 43 is formed between the outer wall of the inner tube 41 and the inner wall of the outer tube 42, and sealing end plates are provided at both ends of the adjustment chamber 43 between the inner tube 41 and the outer tube 42. The sealing end plates at both ends can form a seal for the adjustment chamber 43, and a slidable adjustment slider 44 is provided in the adjustment chamber 43. The adjustment slider 44 is an annular structure, and one side of the adjustment slider 44 is annularly arrayed with multiple springs 45, and the other end of the spring 45 is fixed to the sealing end plate. A plurality of radial air holes 46 are arranged in an array in the middle of the surface of the inner tube 41. Each group of radial air holes 46 is distributed in an annular shape on the surface of the inner tube 41. The radial air holes 46 are opened at an angle on the surface of the inner tube 41, which facilitates the high-pressure natural gas entering from the second radial air inlet pipe 2 to enter the regulating chamber 43. When the radial air holes 46 distributed in an annular shape enter the inner tube 41, the power gas rotates, increases the kinetic energy in the radial direction, and reduces the axial kinetic energy, thereby playing a role in regulating the power gas pressure. When the pressure changes, the regulating slider 44 will slide in the regulating chamber 43, compressing or stretching the spring 45, thereby changing the relative position with the radial air holes 46 to achieve the regulation of the intake volume. Figure 3 and 4 , which are diagrams showing the radial air holes 46 being disconnected and connected. When disconnected, the gas entering from the second radial air intake pipe 2 has not yet entered the inner tube 41. When fully connected, the gas entering from the second radial air intake pipe 2 enters the inner tube 41 to the maximum extent.

[0033] like Figure 2-4 As shown, the radial swirl component 4 is further connected to a second radial air inlet pipe 2. One end of the second radial air inlet pipe 2 extends through the outer tube 42 and into the regulating chamber 43. When the regulating slider 44 is squeezed by the natural gas transported by the second radial air inlet pipe 2, the regulating slider 44 slides along the surface of the inner tube 41 toward the spring 45, squeezing and compressing the spring 45. During the compression process, the radial air holes 46 are exposed, communicating with the natural gas entering the regulating chamber 43. The radially entering natural gas is then directed into the axial airflow within the inner tube 41, thereby regulating the power gas pressure.

[0034] like Figure 1As shown, a protective sleeve 61 is provided at one end of the main sleeve 8 adjacent to the air inlet sleeve 5, and a sleeve nozzle 63 is provided at the other end of the protective sleeve 61. A first-stage ejector 6 is installed inside the protective sleeve 61. The air inlet end of the first-stage ejector 6 passes through the main sleeve 8 and is connected to the interior of the air inlet sleeve 5, and the first-stage nozzle 62 at the other end of the first-stage ejector 6 passes through the protective sleeve 61 and is connected to the interior of the main sleeve 8. A third air inlet pipe 3 is also provided on the main sleeve 8. One end of the third air inlet pipe 3 passes through the main sleeve 8 and is connected to the interior of the protective sleeve 61. The protective sleeve 61 is communicated with the main sleeve 8 and the air inlet end of the second-stage ejector 7 through the sleeve nozzle 63. The third air inlet pipe 3 can be used to introduce auxiliary gas (i.e., high-pressure natural gas, 4-5 MPa) to enhance the injection effect.

[0035] A secondary injector 7 is also embedded in one end of the main sleeve 8. The air inlet end of the secondary injector 7 is located inside the main sleeve 8 and corresponds to the sleeve nozzle 63. The other end of the secondary injector 7 extends outside the main sleeve 8 and is respectively provided with an exhaust port 71 and a reflux port 72. The reflux port 72 is connected to a reflux pipe 74, and a reflux valve 73 is provided on the reflux pipe 74. The other port of the reflux valve 73 is connected to the exhaust gas inlet pipe through a pipeline, which can return some of the untreated gas to the exhaust gas inlet pipe for further treatment, thereby improving the exhaust gas recovery efficiency.

[0036] The working principle of the utility model is as follows: during use, the exhaust gas to be recovered enters the intake sleeve 5 through the exhaust inlet 51. At the same time, the high-pressure natural gas (4-5 MPa) introduced by the first axial intake pipe 1 enters the inner pipe 41 of the radial swirl component 4, and the high-pressure natural gas (4-5 MPa) introduced by the second radial intake pipe 2 enters the regulating chamber 43;

[0037] In the radial swirl component 4, when the pressure increases, the gas in the regulating chamber 43 pushes the regulating slider 44 to slide, compressing the spring 45, so that more radial air holes 46 are opened, increasing the radial air intake. The gas enters the inner tube 41 through the inclined radial air holes 46, mixes with the gas introduced from the first axial air inlet pipe 1 to form a swirl, and then enters the first-stage ejector 6;

[0038] Furthermore, the first-stage ejector 6 performs a first-stage ejection treatment on the mixed gas. The treated gas enters the main sleeve 8 through the first-stage nozzle 62 and then enters the second-stage ejector 7. The gas introduced from the third air inlet pipe 3 enters the protective sleeve 61 and then enters the main sleeve 8 through the sleeve nozzle 63, which is used to assist the gas in the main sleeve 8 to enter the second-stage ejector 7 and enhance the ejection effect.

[0039] In addition, the secondary ejector 7 performs secondary injection treatment on the gas. The qualified gas is discharged through the exhaust port 71 (which can be connected to the natural gas pipeline network). Some of the untreated gas flows back to the exhaust gas inlet pipe through the return port 72, the return pipe 74 and the return valve 73 for further treatment.

[0040] During the entire process, since the power natural gas or steam of the secondary ejector 7 is in the external main casing 8 of the primary ejector 6, the amount of natural gas or steam on the power side is 5-10 times the amount being pumped, and the temperature is also higher than that of the pumped gas, it can effectively take away the coldness of the throat of the primary ejector 6, play a role in heat preservation, and avoid the occurrence of icing. There is no need to set up additional heating and water removal devices, which reduces costs and energy consumption. It should be added that the primary ejector 6 is pressurized from 100kpa to 300kpaA, and the secondary ejector 7 is pressurized from 300kpa to 1200kpaA. The pumped pressure of the secondary ejector 7 is higher than the atmospheric pressure, so the cooling effect is smaller than that of the primary ejector 6. In practice, the throat of the primary ejector 6 is the most prone to icing.

[0041] At the same time, the first-stage injector 6 and the second-stage injector 7 are integrated on the main sleeve 8 to form a nested structure, which can reduce the volume of the device and facilitate assembly and use. In addition, the radial swirl component 4 can flexibly adjust the power gas pressure to ensure the normal operation of the injector.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention. Structures, devices and operating methods that are not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified and limited.

Claims

1. A radial swirl adjustable exhaust gas recovery and injection device, characterized by: It comprises a main sleeve (8) and an air intake sleeve (5) sealed at one end of the main sleeve (8), a radial swirl component (4) is embedded and installed in the middle of one end of the air intake sleeve (5), the middle axial air intake end of the radial swirl component (4) is connected to the first axial air intake pipe (1), and the middle axial air outlet end of the radial swirl component (4) extends to the inside of the air intake sleeve (5), and the radial swirl component (4) is also connected to the second radial air intake pipe (2); A protective sleeve (61) is provided at one end of the main sleeve (8) adjacent to the air inlet sleeve (5), a sleeve nozzle (63) is provided at the other end of the protective sleeve (61), a first-stage ejector (6) is installed inside the protective sleeve (61), the air inlet end of the first-stage ejector (6) passes through the main sleeve (8) and is connected to the interior of the air inlet sleeve (5), and a first-stage nozzle (62) at the other end of the first-stage ejector (6) passes through the protective sleeve (61) and is connected to the interior of the main sleeve (8); A secondary ejector (7) is also embedded in one end of the main sleeve (8), an air inlet end of the secondary ejector (7) is located inside the main sleeve (8) and corresponds to the sleeve nozzle (63), and the other end of the secondary ejector (7) extends outside the main sleeve (8) and is respectively provided with an exhaust port (71) and a return port (72).

2. The radial swirl adjustable exhaust gas recovery and injection device according to claim 1, characterized in that: The axial air outlet end of the radial swirl component (4) is located inside the air inlet sleeve (5), corresponds to the air inlet end of the first-stage ejector (6), and is in communication with each other.

3. The radial swirl adjustable exhaust gas recovery and injection device according to claim 1, characterized in that: A third air inlet pipe (3) is also provided on the main sleeve (8), one end of the third air inlet pipe (3) passes through the main sleeve (8) and is connected to the interior of the protective sleeve (61), and the protective sleeve (61) is connected to the main sleeve (8) and the air inlet end of the secondary ejector (7) through the sleeve nozzle (63).

4. The radial swirl adjustable exhaust gas recovery and injection device according to claim 1, characterized in that: The radial swirl component (4) comprises an inner tube (41) and an outer tube (42), an adjustment chamber (43) is formed between the outer wall of the inner tube (41) and the inner wall of the outer tube (42), and sealing end plates are provided at both ends of the adjustment chamber (43) between the inner tube (41) and the outer tube (42); A slidable adjustment slider (44) is provided in the adjustment chamber (43). The adjustment slider (44) is an annular structure. One side of the adjustment slider (44) is provided with a plurality of springs (45) in an annular array. The other end of the spring (45) is fixed to the sealing end plate.

5. The radial swirl adjustable exhaust gas recovery and injection device according to claim 4, characterized in that: A plurality of groups of radial air holes (46) are arranged in an array in the middle of the surface of the inner tube (41), and each group of radial air holes (46) is distributed in an annular shape on the surface of the inner tube (41), and the radial air holes (46) are opened in an inclined manner on the surface of the inner tube (41); One end of the second radial air inlet pipe (2) passes through the outer pipe (42) and extends into the regulating chamber (43).

6. The radial swirl adjustable exhaust gas recovery and injection device according to claim 1, characterized in that: The air intake sleeve (5) is also provided with an exhaust gas inlet (51), and the exhaust gas inlet (51) is connected to an exhaust gas inlet pipe.

7. The radial swirl adjustable exhaust gas recovery and injection device according to claim 6, characterized in that: The reflux port (72) is connected to a reflux pipe (74), a reflux valve (73) is provided on the reflux pipe (74), and the other end of the reflux valve (73) is connected to the exhaust gas inlet pipe through a pipeline.

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