Turbine expander for recycling chemical tail gas
By adding sealing ring and impeller design in chemical exhaust gas turbine expanders, the problem of equipment gas leakage is solved, and higher sealing and safety is achieved, ensuring the reliability of the exhaust gas recovery process.
Patent Information
- Application Number
- CN202421005531.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The existing chemical exhaust gas turbine expanders have gas leakage problems, which affects the sealing effect. Especially when dealing with harmful exhaust gas, leakage not only affects the safety of the equipment, but may also lead to environmental pollution.
A turbine expander for chemical exhaust gas recovery was designed. By adding a sealing ring between the expansion exhaust pipe, bearing box and fan volute, combined with the design of impeller and sealer, the spindle rotation speed is controlled, and the sealer and Add a sealing ring at the volute connection to enhance the overall sealing and prevent gas leakage.
It effectively prevents gas leakage, enhances the sealing effect, ensures the safety of the exhaust gas recovery process and the reliability of the equipment, and facilitates disassembly and maintenance.
Smart Images
Figure CN222254086U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical tail gas recovery, in particular to a turbine expander for chemical tail gas recovery. Background Art
[0002] The difference between chemical tail gas recovery and ordinary turbine expanders is the sealing effect. Common chemical tail gas is generally harmful to the human body. Therefore, for the turbine expander for tail gas recovery, it is required that there will be no leakage inside the machine when the entire turbine expander is running. Existing turbine expanders have gas leakage. Utility Model Content
[0003] The purpose of the utility model is to solve the above technical problems and to provide a turbine expander for recovering chemical tail gas.
[0004] The technical solution of the utility model: a turbine expander for recovering chemical tail gas, comprising an expansion exhaust pipe, a volute, a nozzle, a bearing box, a main shaft and a fan inlet pipe, the expansion exhaust pipe and the bearing box are respectively connected to the volute, both ends of the main shaft are rotatably connected to the bearings in the bearing box, and the ends of the main shaft passing through the bearing box are provided with impellers, and a sealing ring is provided at the connection between the volute and the bearing box; it also includes a sealer and a fan volute, the sealer is arranged between the volute and the bearing box, the fan volute is connected to the bearing box and the fan inlet pipe, a sealing ring is provided between the bearing box and the fan volute, a sealing ring is provided between the volute and the sealer, and a sealing ring is provided between the fan inlet pipe and the fan volute.
[0005] Preferably, the bearing box is provided with an air inlet pipe and an air outlet pipe, and the bearing is provided with a plurality of air holes.
[0006] Preferably, the sealer is provided with an air inlet hole and an air outlet hole communicating therewith, the air inlet hole is connected to the air inlet passage on the bearing box, and the air outlet hole is connected to the air outlet passage on the bearing box.
[0007] Preferably, it also includes a heat insulation plate, which is arranged between the volute and the bearing box.
[0008] The beneficial effects of the utility model are as follows: in the utility model, gas enters from the fan volute and is discharged from the fan inlet pipe through the impeller at the other end of the main shaft, which hinders the rotation speed of the impeller at the other end of the main shaft, thereby controlling the rotation speed of the main shaft, adding a sealing ring between the bearing box and the volute to strengthen the sealing of the cold end and prevent leakage between the volute and the bearing box, adding a sealing ring at the connection between the sealer and the volute to strengthen the sealing and prevent gas leakage at the expansion end outlet, adding a sealing ring between the bearing box and the fan volute, and between the fan inlet pipe and the fan volute assembly surface to strengthen the sealing and prevent gas leakage at the braking end, the volute, the bearing box and the fan volute are all connected by bolts, and when disassembling, the bolts at the connection can be removed, and the bearing box can be completely pulled out, which is convenient for disassembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a sectional view of the overall structure of a preferred embodiment of the utility model;
[0010] Figure 2 It is a cross-sectional view of the bearing box in the preferred embodiment of the utility model;
[0011] Figure 3 It is a sectional view of the main axis in the preferred embodiment of the utility model.
[0012] Figure numerals: expansion exhaust pipe 1, volute 2, nozzle 3, bearing box 4, bearing 401, air hole 4011, air inlet pipe 402, air outlet pipe 403, main shaft 5, fan inlet pipe 6, sealer 7, fan volute 8, insulation board 9. DETAILED DESCRIPTION
[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0014] Reference Figures 1 to 3, a turbine expander for recovering chemical tail gas, comprising an expansion exhaust pipe 1, a volute 2, a nozzle 3, a bearing box 4, a main shaft 5 and a fan inlet pipe 6, wherein the expansion exhaust pipe 1 and the bearing box 4 are respectively connected to the volute 2, both ends of the main shaft 5 are rotatably connected to the bearings 401 in the bearing box 4, and the ends of the main shaft 5 passing through the bearing box 4 are provided with impellers, and a sealing ring is provided at the connection between the volute 2 and the bearing box 4; further comprising a sealer 7 and a fan volute 8, the sealer 7 is arranged between the volute 2 and the bearing box 4, the fan volute 8 is connected to the bearing box 4 and the fan inlet pipe 6, a sealing ring is provided between the bearing box 4 and the fan volute 8, a sealing ring is provided between the volute 2 and the sealer 7, and a sealing ring is provided between the fan inlet pipe 6 and the fan volute 8. In the utility model, the pressurized gas enters from the cold end of the volute 2, passes through the nozzle 3 and the impeller at one end of the main shaft 5 and is discharged through the expansion exhaust pipe 1. The impeller at one end of the main shaft 5 is impacted to drive the main shaft 5 to rotate, and then the impeller at the other end of the main shaft 5 rotates in the fan inlet pipe 6. The nozzle 3 plays a guiding and expansion role. The gas enters from the fan volute 8 and passes through the impeller at the other end of the main shaft 5 and is discharged from the fan inlet pipe 6, which hinders the rotation speed of the impeller at the other end of the main shaft 5, and then controls the rotation speed of the main shaft 5. A sealing ring is added between the volute 2 and the bearing box 4 to strengthen the sealing of the cold end to prevent leakage between the volute 2 and the bearing box 4. A sealing ring is added at the connection between the sealer 7 and the volute 2 to strengthen the sealing to prevent leakage of gas at the expansion end outlet. A sealing ring is added between the bearing box 4 and the fan volute 8, the fan inlet pipe 6 and the fan volute 8 assembly surface to strengthen the sealing to prevent leakage of gas at the brake end. The volute 2, the bearing box 54 and the fan volute 8 are all connected by bolts. When disassembling, remove the bolts at the connection to pull out the entire bearing box 4, which is convenient for subsequent disassembly and maintenance. Specifically, the sealing ring is an O-ring, and an annular groove for placing the sealing ring is provided on the bearing box 4, the fan inlet pipe 6 and the sealer 7.
[0015] As a preferred embodiment of the utility model, it may also have the following additional technical features:
[0016] In this embodiment, the bearing box 4 is provided with an air inlet pipe 402 and an air outlet pipe 403, and the bearing 401 is provided with a plurality of air holes 4011. Nitrogen enters the bearing box 4 from the air inlet pipe 402, enters the bearing 401 from the air holes 4011, and is then discharged from the air outlet pipe 403, so that the main shaft 5 is suspended in the bearing 401 and rotates, thereby reducing the friction of the main shaft 5.
[0017] In this embodiment, the sealer 7 is provided with an air inlet hole and an air outlet hole communicating therewith, the air inlet hole is connected to the air inlet passage on the bearing box 4, and the air outlet hole is connected to the air outlet passage on the bearing box 4. The sealer 7 plays a role in isolating heat conduction, and the air inlet hole and the air outlet hole on the sealer 7 can further prevent the cold air at the cold end of the volute 2 from being conducted into the bearing box 4, thereby playing an isolating role.
[0018] In this embodiment, an insulation plate 9 is also included, which is arranged between the volute 2 and the bearing box 4. The insulation plate 9 is connected to the external mounting plate. Without the insulation plate 9, the cold end will conduct heat with the mounting plate.
[0019] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.
[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A turbine expander for recovering chemical tail gas, comprising an expansion exhaust pipe (1), a volute (2), a nozzle (3), a bearing box (4), a main shaft (5) and a fan inlet pipe (6), wherein the expansion exhaust pipe (1) and the bearing box (4) are respectively connected to the volute (2), both ends of the main shaft (5) are rotatably connected to bearings (401) in the bearing box (4), and the ends of the main shaft (5) passing through the bearing box (4) are provided with impellers, characterized in that: A sealing ring is provided at the connection between the volute (2) and the bearing box (4); the fan also includes a sealer (7) and a fan volute (8), wherein the sealer (7) is arranged between the volute (2) and the bearing box (4), the fan volute (8) is connected to the bearing box (4) and the fan inlet pipe (6), a sealing ring is provided between the bearing box (4) and the fan volute (8), a sealing ring is provided between the volute (2) and the sealer (7), and a sealing ring is provided between the fan inlet pipe (6) and the fan volute (8).
2. The turboexpander for recovering chemical tail gas according to claim 1, characterized in that: The bearing box (4) is provided with an air inlet pipe (402) and an air outlet pipe (403), and the bearing (401) is provided with a plurality of air holes (4011).
3. The turboexpander for recovering chemical tail gas according to claim 1, characterized in that: The sealer (7) is provided with an air inlet hole and an air outlet hole communicating therewith, the air inlet hole being connected to an air inlet passage on the bearing box (4), and the air outlet hole being connected to an air outlet passage on the bearing box (4).
4. The turboexpander for recovering chemical tail gas according to claim 1, characterized in that: It also includes a heat insulation plate (9) which is arranged between the volute (2) and the bearing box (4).