Integrated nitrogen recovery and purification machine for acetylene production
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-18
- Publication Date
- 2026-08-14
AI Technical Summary
[0004]为了弥补以上不足，本实用新型提供了用于乙炔制备的氮气回收净化一体机，旨在改善对含乙炔氮气的预处理过程中产生的大量粉尘颗粒清理不便，净化效率低容易导致乙炔残留超标的问题
1.本实用新型中，拉动拉杆带动拉片滑动，通过插块、固定块、弹簧、连接杆和卡柱的配合，可以将集尘盒从旋风分离器的底部取下，对收集的粉尘进行清理，达到对分离的粉尘进行收集并便于将集尘盒取下进行清理维护的效果。
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Figure CN224628706U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nitrogen recovery technology in acetylene production, and in particular to an integrated nitrogen recovery and purification machine for acetylene preparation. Background Technology
[0002] Acetylene is a hydrocarbon and the simplest alkyne. Ammonia is a colorless gas with a strong, pungent odor that is highly soluble in water. High-purity nitrogen recovered from acetylene can be reused, saving on procurement costs, reducing emissions, and complying with environmental regulations. Therefore, nitrogen recovery and purification integrated machines used for acetylene production are employed.
[0003] The nitrogen recovery and purification integrated machine for acetylene preparation is used to recover and purify the nitrogen generated during the acetylene preparation process. Acetylene is removed through pretreatment and deep purification. In the existing ammonia recovery technology, acetylene purification is generally incomplete, and the large amount of dust particles generated during the pretreatment process are difficult to clean. The low purification efficiency can easily lead to excessive acetylene residue. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides an integrated nitrogen recovery and purification machine for acetylene preparation, which aims to improve the problem of inconvenient cleaning of a large number of dust particles generated during the pretreatment of acetylene-containing nitrogen, low purification efficiency, and easy excessive acetylene residue.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A nitrogen recovery and purification integrated machine for acetylene preparation includes a cyclone separator. A plug block is fixedly connected to the lower surface of the cyclone separator. A dust collection box is provided on the lower surface of the cyclone separator. A fixing block is slidably connected to the outer wall of the plug block. The outer wall of the fixing block is fixedly connected to the inside of the dust collection box. A pull rod is slidably connected to the inside of the fixing block. A pull plate is fixedly connected to the outer wall of the pull rod. A spring is slidably connected to the outer wall of the pull rod. One end of the spring is fixedly connected to the outer wall of the pull plate, and the other end of the spring is fixedly connected to the inside of the fixing block. A connecting rod is fixedly connected to the outer wall of the pull plate. The outer wall of the connecting rod is slidably connected to the inside of the fixing block. The outer wall of the pull plate is slidably connected to the inside of the fixing block. A connecting assembly is provided inside the cyclone separator.
[0006] The above technical solution involves a dust collection box located at the bottom of the cyclone separator to collect the separated dust. The dust collection box and the cyclone separator are fixed by a locking block and a retaining post. When the pull rod is pulled, the retaining post can be separated from the locking block by a pull plate and a connecting rod, allowing the dust collection box to be removed from the cyclone separator for cleaning and maintenance.
[0007] As a further description of the above technical solution: The connecting assembly includes an exhaust pipe, the outer wall of which is fixedly connected to the inside of the cyclone separator, a connecting pipe fixedly connected to the inside of the exhaust pipe, an exhaust pipe fixedly connected to the inside of the cyclone separator, and a support base fixedly connected to the outer wall of the cyclone separator.
[0008] The above technical solution allows for the removal of over 90% of dust using a cyclone separator. The pre-treated dust then enters the connecting pipe through the outlet pipe for further purification.
[0009] As a further description of the above technical solution: A ceramic filter is fixedly connected to the outer wall of the connecting pipe, a first gas supply pipe is fixedly connected to the inside of the ceramic filter, and an adsorption box is fixedly connected to the outer wall of the first gas supply pipe.
[0010] The above technical solution allows for the interception of particles larger than 5μm by a ceramic filter, and the intercepted gas is then transported to the adsorption box for deep adsorption and purification via the first gas delivery pipe.
[0011] As a further description of the above technical solution: The adsorption box is equipped with an upper activated carbon adsorption bed and a lower activated carbon adsorption bed. A second gas supply pipe is fixedly connected to the inside of the adsorption box. A catalytic oxidizer is fixedly connected to the outer wall of the second gas supply pipe. An exhaust pipe is fixedly connected to the inside of the catalytic oxidizer.
[0012] The above technical solution, through the design of a two-stage adsorption bed with an upper and lower activated carbon adsorption bed, can achieve deep adsorption while simplifying the structure, reducing operating costs and energy consumption. The catalytic oxidizer can convert the remaining acetylene residue into carbon dioxide and water through an oxidation reaction, reducing environmental harm.
[0013] As a further description of the above technical solution: The cyclone separator is electrically connected to a controller, and the controller is electrically connected to an air inlet valve.
[0014] The above technical solution allows the controller to control the entire system and the opening and closing of the intake valve.
[0015] As a further description of the above technical solution: The controller is connected to an automatic airtightness detection module, which includes a pressure sensor and a timer, both of which are installed inside the exhaust pipe.
[0016] The above technical solution uses an automatic airtightness detection module and a pressure sensor to detect the airtightness of the system. By working with a counter, the detection values can be made more accurate.
[0017] As a further description of the above technical solution: The controller is connected to a PID temperature control module, which includes a heater and a temperature sensor, both of which are installed inside the catalytic oxidizer.
[0018] Through the above technical solution: the PID temperature control module plays a role in regulating the temperature of the catalytic oxidizer, the heater can regulate the temperature of the catalytic oxidizer, and the temperature sensor can monitor the temperature.
[0019] As a further description of the above technical solution: The controller is connected to an alarm module, which is electrically connected to an oxygen content sensor, which is installed on the outer wall of the discharge pipe.
[0020] Through the above technical solution, the oxygen content sensor plays the role of real-time monitoring of oxygen content. When the oxygen content exceeds the alarm threshold, the alarm module is triggered and the signal is transmitted to the controller.
[0021] This utility model has the following beneficial effects: 1. In this utility model, pulling the pull rod causes the pull plate to slide. Through the cooperation of the insert block, the fixing block, the spring, the connecting rod and the locking post, the dust collection box can be removed from the bottom of the cyclone separator to clean the collected dust, thereby achieving the effect of collecting the separated dust and making it easy to remove the dust collection box for cleaning and maintenance.
[0022] 2. In this utility model, by adopting an integrated multi-stage adsorption treatment purification method and control system design, not only can the purification efficiency of acetylene be improved, but also the size of the equipment can be reduced, the overall energy consumption can be reduced, the service life of the catalyst can be extended, and the maintenance cost can be reduced. Attached Figure Description
[0023] Figure 1 This is a perspective view of the nitrogen recovery and purification integrated machine for acetylene preparation proposed in this utility model; Figure 2 This is a cross-sectional schematic diagram of the internal structure of the cyclone generator of the integrated nitrogen recovery and purification machine for acetylene preparation proposed in this utility model. Figure 3 This is a cross-sectional schematic diagram of the internal structure of the fixing block of the integrated nitrogen recovery and purification machine for acetylene preparation proposed in this utility model. Figure 4This is a cross-sectional schematic diagram of the internal structure of the adsorption box of the integrated nitrogen recovery and purification machine for acetylene preparation proposed in this utility model. Figure 5 This is a schematic block diagram of the integrated nitrogen recovery and purification machine for acetylene preparation proposed in this utility model.
[0024] Legend: 1. Support base; 2. Cyclone separator; 3. Insert block; 4. Dust collection box; 5. Fixing block; 6. Pull rod; 7. Pull plate; 8. Spring; 9. Connecting rod; 10. Locking post; 11. Connecting assembly; 1101. Outlet pipe; 1102. Connecting pipe; 1103. Exhaust pipe; 12. Ceramic filter; 13. First gas supply pipe; 14. Adsorption box; 15. Upper activated carbon adsorption bed; 16. Lower activated carbon adsorption bed; 17. Second gas supply pipe; 18. Catalytic oxidizer; 19. Discharge pipe. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model provides a nitrogen recovery and purification integrated machine for acetylene preparation, including a cyclone separator 2, an insert block 3 fixedly connected to the lower surface of the cyclone separator 2, a dust collection box 4 provided on the lower surface of the cyclone separator 2, a fixing block 5 slidably connected to the outer wall of the insert block 3, the outer wall of the fixing block 5 fixedly connected to the inside of the dust collection box 4, a pull rod 6 slidably connected to the inside of the fixing block 5, a pull piece 7 fixedly connected to the outer wall of the pull rod 6, a spring 8 slidably connected to the outer wall of the pull rod 6, one end of the spring 8 fixedly connected to the outer wall of the pull piece 7, the other end of the spring 8 fixedly connected to the inside of the fixing block 5, a connecting rod 9 fixedly connected to the outer wall of the pull piece 7, the outer wall of the connecting rod 9 slidably connected to the inside of the fixing block 5, a locking post 10 fixedly connected to the outer wall of the connecting rod 9, the outer wall of the locking post 10 slidably connected to the inside of the fixing block 5, the outer wall of the locking post 10 slidably connected to the inside of the insert block 3, and a connecting assembly 11 provided inside the cyclone separator 2. Specifically, the cyclone separator 2 is connected to the acetylene generator via an exhaust pipe 1103. When acetylene-containing nitrogen gas enters the cyclone separator 2 at high speed through its tangential inlet, this tangential entry causes the gas to form a strong rotational motion within the cyclone separator 2. The gas forms a downward outer vortex and an upward inner vortex. The outer vortex is the main rotating airflow, moving downwards along the wall of the cyclone separator 2. Due to the centrifugal force generated by the rotation, particles are thrown against the inner wall of the cyclone separator 2 and move downwards with the outer vortex, eventually entering the dust collection box 4 for collection. The purified gas moves upwards through the inner vortex and is discharged from the top outlet pipe 1101. The cyclone separator 2 serves to fix the insert block 3. By inserting the insert block 3 into the dust collection box 4, the cyclone separator 2 and the dust collection box 4 can be cleaned. The limiting and fixing block 5 is fixed inside the dust collection box 4 to support the pull rod 6. The pull rod 6 fixes the pull piece 7. By pulling the pull rod 6, the pull piece 7 can slide synchronously inside the fixing block 5. The spring 8 is set inside the pull piece 7 and the fixing block 5 and will be squeezed as the pull piece 7 slides. The connecting rod 9 connects the pull piece 7 and the locking post 10. By sliding the pull piece 7, the locking post 10 can slide against the inner wall of the fixing block 5 through the connecting rod 9. The locking post 10 acts as a limiting block 3. When the locking post 10 is locked inside the insertion block 3, it can limit and fix the position of the insertion block 3 inside the fixing block 5. Conversely, when the locking post 10 slides out of the insertion block 3, the restriction on the insertion block 3 can be released. The dust collection box 4 can be removed from the bottom of the cyclone separator 2 for cleaning and maintenance.
[0027] Reference Figure 1 The connecting component 11 includes an exhaust pipe 1101. The outer wall of the exhaust pipe 1101 is fixedly connected to the inside of the cyclone separator 2. A connecting pipe 1102 is fixedly connected to the inside of the exhaust pipe 1101. An exhaust pipe 1103 is fixedly connected to the inside of the cyclone separator 2. A support base 1 is fixedly connected to the outer wall of the cyclone separator 2. Specifically, the support base 1 supports and fixes the cyclone separator 2, the outlet pipe 1101 transports gas, and when the purified gas moves upward, it can be transported to the inside of the connecting pipe 1102. The exhaust pipe 1103 connects the cyclone separator 2 and the acetylene generator, and can transport the gas to be purified to the inside of the cyclone separator 2 for separation and purification.
[0028] Reference Figure 1 and Figure 4A ceramic filter 12 is fixedly connected to the outer wall of the connecting pipe 1102. A first gas supply pipe 13 is fixedly connected to the inside of the ceramic filter 12. An adsorption box 14 is fixedly connected to the outer wall of the first gas supply pipe 13. An upper activated carbon adsorption bed 15 is arranged inside the adsorption box 14. A lower activated carbon adsorption bed 16 is arranged inside the adsorption box 14. A second gas supply pipe 17 is fixedly connected to the inside of the adsorption box 14. A catalytic oxidizer 18 is fixedly connected to the outer wall of the second gas supply pipe 17. An exhaust pipe 19 is fixedly connected to the inside of the catalytic oxidizer 18. Specifically, the connecting pipe 1102 connects the ceramic filter 12 and the outlet pipe 1101, allowing purified gas to be transported to the interior of the ceramic filter 12 for further deep purification, intercepting particles with a diameter >5μm. The first gas delivery pipe 13 connects the ceramic filter 12 and the adsorption box 14, allowing purified gas to be transported to the interior of the adsorption box 14. The adsorption box 14 contains an upper activated carbon adsorption bed 15 and a lower activated carbon adsorption bed 16 stacked vertically. The gas first passes through the lower activated carbon adsorption bed 16 to remove 80% acetylene. Driven by the pressure difference, the gas then... The remaining acetylene is further reduced to below 10 ppm by the upper activated carbon adsorption bed 15, where the activated carbon is coal-based columnar carbon. The second gas supply pipe 17 connects the adsorption box 14 and the catalytic oxidizer 18, and can transport the purified gas to the interior of the catalytic oxidizer 18 to convert the residual acetylene into CO2 and water vapor. The catalytic oxidizer 18 uses a platinum-palladium catalyst. When nitrogen gas containing acetylene passes through the catalyst bed, acetylene molecules are adsorbed on the catalyst surface and undergo an oxidation reaction. During the reaction, acetylene combines with oxygen to generate carbon dioxide and water, thereby achieving effective removal of acetylene.
[0029] Reference Figure 5 The cyclone separator 2 is electrically connected to a controller, which is electrically connected to an intake valve. The controller is also connected to an automatic airtightness detection module, which includes a pressure sensor and a timer, both of which are installed inside the exhaust pipe 1103. Furthermore, the controller is connected to a PID temperature control module, which includes a heater and a temperature sensor, both of which are installed inside the catalytic oxidizer 18. Finally, the controller is connected to an alarm module, which is electrically connected to an oxygen content sensor, which is installed on the outer wall of the exhaust pipe 19. Specifically, before purifying the acetylene-containing nitrogen gas, an airtightness test of the entire integrated unit is required. A certain pressure of gas is injected into the exhaust pipe 1103 using a compressor or other pressure source, raising its internal pressure to the set test pressure. The controller then controls the automatic airtightness detection module, which continuously tests the airtightness of the entire device for 30 minutes using a pressure sensor installed inside the exhaust pipe 1103. The pressure sensor provides real-time data, and a timer records the test duration; these two are the core inputs for the test. When the pressure test is maintained at 0.9 MPa / 30 min, the automatic airtightness detection module transmits the data to the controller. The controller receives the pressure data and determines whether there is a leak. At this point, the controller further sends instructions to the PID temperature control module. The temperature sensor monitors the temperature of the catalytic oxidizer 18 in real time. Based on the temperature sensor data, the PID temperature control module uses a PID algorithm to control the heater to regulate the temperature inside the catalytic oxidizer 18. The temperature of the catalytic oxidizer 18 is raised to 300℃ at a rate of 10℃ / min and maintained at a constant temperature. At this time, the temperature sensor transmits the signal to the PID temperature control module, which in turn transmits the signal to the controller. The controller then receives the instruction and controls the opening of the intake valve, allowing acetylene-containing nitrogen gas to enter the cyclone separator 2, ceramic filter 12, and adsorption box 14 for deep purification. The purified gas then enters the interior of the catalytic oxidizer 18. When the purified gas needs to be discharged, the oxygen content sensor installed on the discharge pipe 19 monitors the oxygen content in real time. When the oxygen content reaches the alarm threshold of 2%VOL, the oxygen content sensor converts the change signal into an electrical signal and transmits it to the alarm module. The alarm module sends an alarm to the controller, which then controls the closing of the intake valve and initiates the backflushing program. The backflushing program controls the upper activated carbon adsorption bed 15 and the lower activated carbon adsorption bed 16 to be backflushed every 48 hours to maintain adsorption efficiency and extend the service life of the activated carbon.
[0030] Working principle: When the integrated machine is needed, the exhaust pipe 1103 is connected to the acetylene generator through the inlet flange. The controller first performs an airtightness test. After confirming that the system is sealed, the inlet valve is opened. Acetylene-nitrogen gas enters the cyclone separator 2 through the exhaust pipe 1103, removing more than 90% of the dust. The dust will fall into the dust collection box 4 under the action of centrifugal force. The purified gas moves upward through the internal vortex and enters the connecting pipe 1102 through the outlet pipe 1101. It then enters the ceramic filter 12 to intercept particles with a diameter >5μm. The pretreated gas is then transported through the first gas delivery system. Pipe 13 enters the adsorption box 14. First, 80% of the acetylene is removed by the lower activated carbon adsorption bed 16. The remaining acetylene is further reduced to below 10 ppm by the upper activated carbon adsorption bed 15. The temperature of the catalytic oxidizer 18 is regulated by the controller. The gas after deep purification enters the catalytic oxidizer 18 to convert the remaining acetylene into CO2 and water vapor. Finally, it is discharged through the exhaust pipe 19. The oxygen content sensor monitors the oxygen content in real time. Once the threshold is exceeded, an alarm is triggered and the alarm is fed back to the controller. This achieves the effect of improving purification efficiency and reducing energy consumption through integrated multi-stage purification treatment. When it is necessary to clean the dust particles inside the dust collection box 4, simply pull the levers 6 on both sides. The levers 6 will cause the pull plate 7 to slide inside the fixed block 5 and compress the spring 8 during the sliding process. When the pull plate 7 slides, it will cause the connecting rod 9 and the locking post 10 to slide inside the fixed block 5 at the same time. When the locking post 10 slides out of the insert block 3, the control of the insert block 3 can be released. At this time, the dust collection box 4 can be removed from the bottom of the support base 1 for cleaning and replacement. The detachable design facilitates the cleaning of the dust particles inside the dust collection box 4 and also facilitates the replacement and maintenance of the dust collection box 4. This all-in-one machine can not only improve the purification efficiency and reduce energy consumption through integrated multi-stage purification treatment, but also achieve the effect of detachable design, which facilitates the cleaning of the dust particles inside the dust collection box 4 and also facilitates the replacement and maintenance of the dust collection box 4.
[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A nitrogen recovery and purification all-in-one machine for acetylene preparation, comprising a cyclone separator (2), characterized in that: A plug block (3) is fixedly connected to the lower surface of the cyclone separator (2). A dust collection box (4) is provided on the lower surface of the cyclone separator (2). A fixing block (5) is slidably connected to the outer wall of the plug block (3). The outer wall of the fixing block (5) is fixedly connected to the inside of the dust collection box (4). A pull rod (6) is slidably connected to the inside of the fixing block (5). A pull tab (7) is fixedly connected to the outer wall of the pull rod (6). A spring (8) is slidably connected to the outer wall of the pull rod (6). One end of the spring (8) is fixedly connected to the outer wall of the pull tab (7). The other end of the spring (8) is fixedly connected to the inside of the fixing block (5). A connecting rod (9) is fixedly connected to the outer wall of the pull tab (7). The outer wall of the connecting rod (9) is slidably connected to the outer wall of the connecting rod (9). Inside the fixed block (5), the outer wall of the connecting rod (9) is fixedly connected to a locking post (10), the outer wall of the locking post (10) is slidably connected to the inside of the fixed block (5), the outer wall of the locking post (10) is slidably connected to the inside of the insert block (3), and the inside of the cyclone separator (2) is provided with a connecting assembly (11); the connecting assembly (11) includes an exhaust pipe (1101), the outer wall of the exhaust pipe (1101) is fixedly connected to the inside of the cyclone separator (2), the inside of the exhaust pipe (1101) is fixedly connected to a connecting pipe (1102), the inside of the cyclone separator (2) is fixedly connected to an exhaust pipe (1103), and the outer wall of the cyclone separator (2) is fixedly connected to a support base (1).
2. The nitrogen recovery and purification all-in-one machine for acetylene preparation according to claim 1, characterized in that: A ceramic filter (12) is fixedly connected to the outer wall of the connecting pipe (1102), a first gas supply pipe (13) is fixedly connected to the inside of the ceramic filter (12), and an adsorption box (14) is fixedly connected to the outer wall of the first gas supply pipe (13).
3. The nitrogen recovery and purification integrated machine for acetylene preparation according to claim 2, characterized in that: The adsorption box (14) is provided with an upper activated carbon adsorption bed (15) and a lower activated carbon adsorption bed (16). A second gas supply pipe (17) is fixedly connected inside the adsorption box (14). A catalytic oxidizer (18) is fixedly connected to the outer wall of the second gas supply pipe (17). An exhaust pipe (19) is fixedly connected inside the catalytic oxidizer (18).
4. The nitrogen recovery and purification all-in-one machine for acetylene preparation according to claim 1, characterized in that: The cyclone separator (2) is electrically connected to a controller, and the controller is electrically connected to an air intake valve.
5. The nitrogen recovery and purification all-in-one machine for acetylene preparation according to claim 4, characterized in that: The controller is connected to an automatic airtightness detection module, which includes a pressure sensor and a timer. Both the pressure sensor and the timer are installed inside the exhaust pipe (1103).
6. The nitrogen recovery and purification all-in-one machine for acetylene preparation according to claim 4, characterized in that: The controller is connected to a PID temperature control module, which includes a heater and a temperature sensor. Both the heater and the temperature sensor are installed inside the catalytic oxidizer (18).
7. The nitrogen recovery and purification all-in-one machine for acetylene preparation according to claim 4, characterized in that: The controller is connected to an alarm module, which is electrically connected to an oxygen content sensor. The oxygen content sensor is installed on the outer wall of the discharge pipe (19).