A calcium carbide method acetylene gas purification device

Abstract

The utility model relates to gas purification technical field especially is a calcium carbide method acetylene gas purification device, including washing tower, circulating pump, cooler and collector, the one side lower extreme of washing tower is installed for the acetylene pipe of air inlet, the top of washing tower is installed for the first connecting pipe of air outlet, the other end of first connecting pipe is connected in the one side lower extreme of cooler, and the other side of cooler is installed for the heat exchange pipe of cooling use, the top of cooler is installed with second connecting pipe, and the other end of second connecting pipe is installed with collector, and the top of collector is installed with the air pipe, in the utility model, integrated acetylene gas purification process, after entering washing tower, acetylene gas is fully washed through the multistage shower nozzle structure of inside back type setting, can effectively remove the alkali liquor and small impurities of entrainment, improve gas quality, and the cooler of cooperation setting can further reduce gas temperature and moisture content, improve the stability of subsequent reaction.

Description

Technical Field

[0001] This utility model relates to the field of gas purification technology, specifically to a calcium carbide-based acetylene gas purification device. Background Technology

[0002] Currently, in the calcium carbide-based acetylene gas production process, acetylene gas, after being generated by the generator, typically passes through a sodium hypochlorite purification tower and an alkaline scrubbing tower before being directly fed into the vinyl chloride synthesis process. However, this process has significant problems. On the one hand, after passing through the alkaline scrubbing tower, acetylene gas still exhibits alkaline entrainment. Upon entering the vinyl chloride synthesis system, it easily reacts with hydrogen chloride to produce byproducts such as sodium chloride or hydrochloric acid, which exacerbates equipment corrosion and increases the pressure on waste liquid treatment. On the other hand, insufficiently treated acetylene gas contains a certain amount of moisture and insoluble impurities, which easily deposit and scale in pipelines or clog flame arresters, affecting the safety and continuity of subsequent reactions. In addition, the reaction heat generated during the synthesis process requires additional cooling devices for absorption, increasing energy consumption and operating costs. Traditional processes involve complex condensate recovery methods, relying on external condenser tanks and pumping systems, resulting in complex structures, low automation, heavy daily operation and maintenance burdens, and room for improvement in safety and energy efficiency. Therefore, to address the above problems, an acetylene gas purification device for the calcium carbide-based process is proposed. Utility Model Content

[0003] The purpose of this invention is to provide an acetylene gas purification device using the calcium carbide method to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An acetylene gas purification device using the calcium carbide method includes a scrubbing tower, a circulating pump, a cooler, and a collector. An acetylene inlet pipe is installed at the lower end of one side of the scrubbing tower, and a first connecting pipe for outlet gas is installed at the top of the scrubbing tower. The other end of the first connecting pipe is connected to the lower end of one side of the cooler, and a heat exchange pipe for cooling is installed on the other side of the cooler. A second connecting pipe is installed at the top of the cooler, and a collector is installed at the other end of the second connecting pipe. An outlet pipe is installed at the top of the collector.

[0006] Preferably, a washing pipe is installed on the inner side of the washing tower via a fixed base, a nozzle is installed on the outer side of the washing pipe, a water inlet pipe is installed on one side of the washing pipe, a circulation pump is installed at one end of the water inlet pipe, and a water outlet pipe is installed at the water inlet end of the circulation pump, and the other end of the water outlet pipe is installed at the bottom of the washing tower, and the other end of the water inlet pipe is connected to the alkaline washing tower.

[0007] Preferably, a control valve is installed on the outside of the water inlet pipe, and a liquid level detector is installed on the inside of the washing tower via a connecting frame, and the liquid level detector is electrically connected to the control valve.

[0008] Preferably, one side of the washing pipe is arranged in a U-shape, and the nozzles are evenly installed on one side of the washing pipe. There are multiple washing pipes, and the washing pipes are evenly installed inside the washing tower.

[0009] Preferably, both the cooler and the collector are equipped with liquid recovery pipes at their bottom ends, the other end of which is connected to a main pipe, and the other side of the main pipe is connected to a scrubbing tower.

[0010] Preferably, the main pipe has a multi-segment structure, and the height of the end of the main pipe connected to the recovery pipe is more than 600mm lower than the height of the end of the main pipe connected to the washing tower.

[0011] Preferably, a temperature sensor for temperature detection is installed on the outside of the second connecting tube.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this utility model, an integrated acetylene gas purification process is formed by setting up four core components: a scrubbing tower, a cooler, a circulating pump, and a collector. After entering the scrubbing tower, the acetylene gas is thoroughly scrubbed through the multi-stage nozzle structure with a loop-shaped internal structure, which can effectively remove entrained alkali and tiny impurities, improve gas quality, and at the same time, the cooler can further reduce the gas temperature and water content, and improve the stability of subsequent reactions.

[0014] 2. In this invention, the automatic adjustment of the washing liquid flow rate is achieved through the linkage control of the liquid level detector and the regulating valve, reducing manual intervention and improving control accuracy and automation level. Furthermore, the condensate is returned to the washing tower via the height difference, eliminating the need for an additional condensate tank and circulating pump, simplifying the process, reducing energy consumption, and demonstrating good energy efficiency and engineering feasibility.

[0015] 3. In this invention, the treated acetylene gas tends to be neutral, which significantly reduces the possibility of reacting with hydrogen chloride to generate byproducts, thereby reducing the corrosion risk and maintenance costs of subsequent systems. Simultaneously, the separated washing liquid retains a certain degree of alkalinity and can be recycled back to the alkaline washing tower, saving alkali consumption and reducing operating costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a front view of the present utility model;

[0018] Figure 3 This is a cross-sectional view of the washing tower of this utility model;

[0019] Figure 4This utility model Figure 3 A schematic diagram of the structure at point A.

[0020] In the diagram: 1. Scrubber; 2. Circulating pump; 3. Cooler; 4. Collector; 5. Acetylene pipe; 6. First connecting pipe; 7. Heat exchange pipe; 8. Second connecting pipe; 9. Gas outlet pipe; 10. Scrubber pipe; 11. Nozzle; 12. Water inlet pipe; 13. Temperature sensor; 14. Water outlet pipe; 15. Control valve; 16. Liquid level detector; 17. Recovery pipe; 18. Main pipe; 19. Mounting base. Detailed Implementation

[0021] 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.

[0022] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] An acetylene gas purification device using the calcium carbide method includes a scrubbing tower 1, a circulating pump 2, a cooler 3, and a collector 4, which, together with multiple connecting pipelines and control devices, constitute a closed acetylene gas purification system.

[0025] Acetylene gas from the alkaline scrubbing tower enters the scrubbing system from the bottom of scrubbing tower 1 through acetylene pipe 5. Scrubbing tower 1 has multiple openings on its sidewalls, and several scrubbing pipes 10 arranged in a loop are installed via internal mounting bases 19. Spray nozzles 11 are evenly distributed on the outer side of the scrubbing pipes 10. These nozzles atomize the scrubbing liquid to form a continuous and uniform scrubbing curtain, thoroughly cleaning the acetylene gas and removing entrained alkaline solutions, insoluble impurities, and some moisture. The scrubbing pipes 10 are connected to the circulating pump 2 via a water inlet pipe 12. The inlet of the circulating pump 2 is connected to the liquid at the bottom of scrubbing tower 1 via a water outlet pipe 14. After the circulating pump 2 starts, it draws out the liquid from the bottom and pressurizes it, sending it into the multiple spray nozzles 11 inside the scrubbing tower, forming a closed loop and enhancing the scrubbing effect. The water inlet pipe 12 is also connected to the alkaline scrubbing tower, allowing some of the scrubbing liquid to be returned to the alkaline scrubbing tower for reuse, reducing system operating costs.

[0026] A control valve 15 is installed on the water inlet pipe 12 to regulate the flow rate. The control valve 15 is electrically connected to the liquid level detector 16 installed on the inner wall of the scrubbing tower 1, forming a liquid level automatic control system. When the liquid level detector 16 detects a rise in the liquid level, the control system automatically adjusts the opening of the control valve 15 to increase liquid backflow, prevent liquid overflow, and improve the system's automation level and operational safety.

[0027] The washed acetylene gas enters the lower part of the cooler 3 from the top of the scrubbing tower 1 through the first connecting pipe 6. The top of the cooler 3 is equipped with a second connecting pipe 8 that connects to the trap 4. Simultaneously, a heat exchange pipe 7 is installed on the outside of the cooler 3, using a counter-current cooling method with cold water entering from the top and exiting from the bottom to cool the acetylene gas. A temperature sensor 13 is installed on the outlet pipe of the cooler 3 to monitor the acetylene gas temperature in real time and ensure gas stability. The condensate generated during the cooling process flows out from the bottom of the cooler 3, enters the main pipe 18 through the recovery pipe 17, and then flows back to the bottom of the scrubbing tower 1.

[0028] After cooling, acetylene gas enters the lower part of the collector 4 through the second connecting pipe 8. After further dehumidification and impurity collection, it is sent to the vinyl chloride synthesis process from the top through the outlet pipe 9. A recovery pipe 17 is also provided at the bottom of the collector 4, which, together with the condensate from the bottom of the cooler 3, flows into the main pipe 18. To ensure smooth return of the recovered liquid, the main pipe 18 adopts a multi-section structure, with the end near the scrubbing tower being at least 600mm higher than the condensation section end. This height difference drives the liquid to flow back naturally, eliminating the need for a separate return pump and reducing energy consumption and investment costs. To prevent acetylene gas from short-circuiting through the condensate, a liquid sump is installed in the return pipeline to ensure a liquid sealing height of not less than 600mm, improving system safety.

[0029] The entire device has a compact structure and clear functional zoning. Through multi-stage washing, cooling and collection steps, acetylene gas is fully purified and its moisture content is controlled, ultimately outputting high-purity, low-humidity, and near-neutral acetylene gas. This effectively avoids alkaline residue and side reactions, and improves the efficiency and stability of the vinyl chloride synthesis reaction.

[0030] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An acetylene gas purification device using the calcium carbide method, comprising a scrubbing tower (1), a circulating pump (2), a cooler (3), and a collector (4), characterized in that: An acetylene pipe (5) for air intake is installed at the lower end of one side of the scrubbing tower (1), and a first connecting pipe (6) for air outlet is installed at the top of the scrubbing tower (1). The other end of the first connecting pipe (6) is connected to the lower end of one side of the cooler (3), and a heat exchange pipe (7) for cooling is installed on the other side of the cooler (3). A second connecting pipe (8) is installed at the top of the cooler (3), and a trap (4) is installed at the other end of the second connecting pipe (8). An air outlet pipe (9) is installed at the top of the trap (4).

2. The acetylene gas purification device according to claim 1, characterized in that: A washing pipe (10) is installed on the inner side of the washing tower (1) via a fixing seat (19). A nozzle (11) is installed on the outer side of the washing pipe (10). A water inlet pipe (12) is installed on one side of the washing pipe (10). A circulation pump (2) is installed at one end of the water inlet pipe (12), and a water outlet pipe (14) is installed at the water inlet end of the circulation pump (2). The other end of the water outlet pipe (14) is installed at the bottom of the washing tower (1). The other end of the water inlet pipe (12) is connected to the alkaline washing tower.

3. The acetylene gas purification device according to claim 2, characterized in that: A control valve (15) is installed on the outside of the water inlet pipe (12), and a liquid level detector (16) is installed on the inside of the washing tower (1) through a connecting frame, and the liquid level detector (16) is electrically connected to the control valve (15).

4. The acetylene gas purification device according to claim 2, characterized in that: The washing pipe (10) is arranged in a U-shape on one side, and the nozzles (11) are evenly installed on one side of the washing pipe (10). There are multiple washing pipes (10), and the washing pipes (10) are evenly installed on the inside of the washing tower (1).

5. The acetylene gas purification device according to claim 1, characterized in that: The cooler (3) and the collector (4) are both equipped with liquid recovery pipes (17) at their bottom ends. The other end of the recovery pipe (17) is connected to a main pipe (18), and the other side of the main pipe (18) is connected to the scrubbing tower (1).

6. The acetylene gas purification device according to claim 5, characterized in that: The main pipe (18) has a multi-segment structure, and the height of the end of the main pipe (18) connected to the recovery pipe (17) is more than 600 mm lower than the end of the main pipe (18) connected to the washing tower (1).

7. The acetylene gas purification device according to claim 1, characterized in that: A temperature sensor (13) for temperature detection is installed on the outside of the second connecting pipe (8).

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