Acetylene gas production and purification device

Abstract

The invention discloses an acetylene gas production and purification device, which relates to the technical field of purification devices and comprises a purification tank, a replacement tank, an acetylene gas inlet pipe, an acetylene gas outlet pipe, a new liquid feeding pipe, a new liquid discharging pipe and a waste liquid recycling pipe, after a part of the reacted silver nitrate solution is discharged, the suspension plate upwards jacks the control rod, so that the blocking plate does not block the new liquid discharging pipe any more, the new silver nitrate solution is added into the purification tank, and after most of the reacted silver nitrate solution enters the recovery cavity, the new liquid discharging pipe is blocked by the blocking plate; a suspension plate drives a sliding block to move upwards, so that a clamping block does not position a sealing plate any more, the sealing plate is reset through a first spring, a large amount of new silver nitrate solution enters the purification tank and then acetylene purification can be continued, and the effect that the device can automatically discharge and replace according to the real-time reaction degree of the silver nitrate solution is achieved; compared with the prior art, the device has the advantage that the replacement time is more accurate.

Description

Technical Field

[0001] This invention relates to the field of purification equipment technology, specifically to an acetylene gas production and purification device. Background Technology

[0002] Acetylene is a highly flammable gas. Its industrial production primarily utilizes the calcium carbide process. This process uses calcium limestone as raw material, which is processed at high temperatures in an electric arc furnace to produce calcium carbide. Acetylene gas is then produced through the reaction of calcium carbide with water. However, calcium carbide often contains sulfide impurities, inevitably introducing small amounts of impurities, such as hydrogen sulfide, into the resulting acetylene gas. This associated gas significantly increases the explosion risk of the mixture and also reduces the purity of the acetylene, negatively impacting the quality of subsequent products. Therefore, an acetylene gas purification unit is used in the production process to remove hydrogen sulfide.

[0003] An acetylene gas production and purification device is used to further purify industrially produced acetylene gas to a high purity. Its main functions are to remove impurities (such as hydrogen sulfide) and stabilize gas quality to meet the high purity requirements of the electronics industry or other applications. The purification principle involves passing the raw acetylene through an inlet pipe into a container filled with a 20% silver nitrate solution. Impurities such as phosphine (PH3) and hydrogen sulfide (H2S) in the acetylene react with the silver nitrate to form insoluble silver phosphide and silver sulfide precipitates, thereby removing these harmful impurities.

[0004] Existing purification equipment effectively removes harmful impurities from acetylene by contacting it with a silver nitrate solution, offering advantages such as high efficiency in impurity removal, high purification purity, environmental friendliness, and stability. However, as the reaction continues, precipitate gradually accumulates, covering the active sites in the solution and causing the reaction rate to gradually decrease. How to replace the silver nitrate solution remains a significant challenge in the purification process. The process involves manually closing the acetylene inlet pipe and opening the outlet valve to drain the silver nitrate solution, followed by injecting new silver nitrate solution. This manual operation is difficult and demanding.

[0005] Sensors and controllers are installed at the gas outlet, silver nitrate solution outlet, and inlet to automate the replacement of silver nitrate solution, which is relatively efficient. However, in addition to the need to stop acetylene emissions during the replacement process, which delays the purification progress and continuity, the main problem is that manual observation of the reaction degree of the silver nitrate solution is still required to control the external control system for replacement. The judgment of the reaction degree of the solution depends on the subjective experience of the staff and lacks objective standards, resulting in insufficient accuracy in the timing of replacement and making it difficult to achieve automatic emission and replacement based on the real-time reaction degree of the silver nitrate solution.

[0006] Therefore, the present invention proposes an acetylene gas production and purification device. Summary of the Invention

[0007] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide an acetylene gas production and purification device to solve the problem mentioned in the background art of difficulty in automatically discharging and replacing gas based on the real-time reaction level of silver nitrate solution.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an acetylene gas production and purification apparatus, comprising a purification tank, a displacement tank, an acetylene inlet pipe and an acetylene outlet pipe disposed on the purification tank, and a new liquid inlet pipe, a new liquid outlet pipe and a waste liquid recovery pipe disposed outside the displacement tank, further comprising: A waste liquid discharge pipe is connected between the purification tank and the displacement tank. The displacement tank is provided with a new liquid chamber for storing silver nitrate solution and a recovery chamber for storing the reaction waste liquid from the purification tank. The new liquid discharge pipe is connected to the new liquid chamber and the inner cavity of the purification tank. The waste liquid discharge pipe is connected to the recovery chamber and the inner cavity of the purification tank. The sealing plate is installed in the purification tank at a position lower than the acetylene inlet pipe. The sealing plate moves downward as the reaction product of the silver nitrate solution increases in weight, thereby activating the automatic discharge of waste liquid through the waste liquid discharge pipe. Furthermore, an elastic element is provided below the sealing plate to drive the sealing plate to move upward and reset. The suspension plate is located inside the recovery chamber and moves by rising and falling with the level of the waste liquid. An automatic liquid addition mechanism is located between the new liquid chamber and the recovery chamber. Its movement is that it rises and falls with the suspension plate, drives the opening and closing of the new liquid outlet pipe port, and automatically controls the replenishment of new liquid. A support rod is connected between the purification tank and the replacement tank and is located below the waste liquid discharge pipe. The support rod is equipped with a positioning and reset mechanism for locking the sealing plate after it has descended. The positioning and reset mechanism includes a slider located in the recovery chamber, which moves upward as the suspension plate moves upward, thereby controlling the positioning and reset mechanism to release the locking of the sealing plate.

[0009] Furthermore, one end of the new liquid outlet pipe extends into the interior of the purification tank and is fixedly connected to the purification tank. The automatic liquid addition mechanism includes a blocking plate, which blocks the end of the new liquid outlet pipe that extends into the replacement tank.

[0010] Furthermore, the elastic element is a first spring fixedly connected to the bottom of the sealing plate, the bottom of the first spring is fixedly connected to the inner bottom wall of the purification tank, the top of the sealing plate is an inclined surface, and the outer wall of the sealing plate is provided with a groove.

[0011] Furthermore, one end of the waste liquid discharge pipe extends into the interior of the replacement tank and is fixedly connected to the replacement tank.

[0012] Furthermore, the positioning and resetting mechanism includes a retraction groove formed at one end of the bearing rod, the outer wall of the locking block is slidably connected to the inside of the retraction groove, one end of the locking block is fixedly connected to a second spring, and one end of the second spring is fixedly connected to the inner side wall of the retraction groove, and the top of the end of the locking block extending outside the retraction groove is a slope.

[0013] Furthermore, a steel rope is fixedly connected to one end of the card block, a through groove is provided on the inner side wall of the retraction groove, and the steel rope is slidably connected to the through groove. A slider is fixedly connected to one end of the steel rope, and one side of the slider is slidably connected to one end of the bearing rod.

[0014] Furthermore, the automatic liquid addition mechanism also includes a control rod connected to the blockage plate and extending into the recovery chamber. The inner top wall of the recovery chamber has a channel, the top of the control rod passes through the channel and extends into the new liquid chamber, and the control rod is slidably connected to the channel.

[0015] Furthermore, the bottom of the blocking plate is fixedly connected to one end of the control rod that extends into the new liquid chamber, and a counterweight is fixedly connected to the other end of the control rod.

[0016] Furthermore, the suspension plate is composed of a ring and a disk, and the ring and the disk are fixedly connected by a connecting rod. A counterweight ring is fixedly connected to the bottom of the suspension plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are: When silver nitrate solution comes into contact with acetylene gas, the harmful gases in the acetylene gas react with the silver nitrate solution to generate solid impurities. As the reaction continues, the silver nitrate solution becomes heavier due to the increasing amount of impurities. The sealing plate moves downward under gravity and is blocked by the clamping block. During this process, the waste liquid discharge pipe is exposed, and the reacted silver nitrate solution is discharged into the recovery chamber. As the amount of silver nitrate solution in the recovery chamber increases, the suspension plate moves upward with the liquid level. After a portion of the reacted silver nitrate solution is discharged, the suspension plate pushes the control rod upward, preventing the blocking plate from blocking the new liquid discharge pipe. New silver nitrate solution is then added to the purification tank. After most of the reacted silver nitrate solution enters the recovery chamber, the suspension plate drives the slider upward. The slider pulls the clamping block via a steel cable, preventing the clamping block from positioning the sealing plate. The sealing plate is then reset by the first spring. A large amount of new silver nitrate solution enters the purification tank to continue purifying acetylene. This device can automatically discharge and replace the silver nitrate solution based on the real-time reaction level, offering the advantage of more precise replacement timing compared to existing technologies.

[0018] In addition, when most of the silver nitrate solution and the impurities generated by its reaction enter the recovery chamber, the suspension plate will float higher with the liquid level and push the control rod upward, causing the control rod to move upward and preventing the blocking plate from blocking the new liquid outlet pipe. The new silver nitrate solution stored in the new liquid chamber will enter the purification tank through the new liquid outlet pipe. Therefore, before all the silver nitrate solution in the purification tank is discharged, the new silver nitrate solution has already been added to the purification tank. The capacity of the silver nitrate solution in the purification tank is always sufficient to react and purify the acetylene gas. This allows the acetylene purification work to continue without stopping when the silver nitrate solution is replaced, thus improving the overall work efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a cross-sectional view of the purification tank and the displacement tank in this invention.

[0021] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.

[0022] Figure 4 This is a comparison diagram showing the state of a small portion of the silver nitrate solution entering the recovery chamber in this invention.

[0023] Figure 5 This is a comparison diagram showing the state in which most of the silver nitrate solution enters the recovery chamber in this invention.

[0024] Figure 6 This is a comparison diagram of the states of the sealing plate during reset in this invention.

[0025] Figure 7 for Figure 6 Enlarged view of the structure at point B.

[0026] Figure 8 This is a schematic diagram of the sealing plate in this invention.

[0027] Figure 9 This is a schematic diagram of the suspension plate in this invention.

[0028] Figure 10 This is a schematic diagram of the control lever in this invention.

[0029] In the diagram: 1. Purification tank; 2. Acetylene inlet pipe; 3. Acetylene outlet pipe; 4. Sealing plate; 41. First spring; 42. Slot; 5. Waste liquid discharge pipe; 6. Replacement tank; 7. New liquid chamber; 71. New liquid inlet pipe; 72. New liquid outlet pipe; 8. Recovery chamber; 81. Waste liquid recovery pipe; 82. Suspension plate; 83. Counterweight ring; 9. Bearing rod; 91. Retraction groove; 92. Second spring; 93. Slot; 94. Steel rope; 95. Sliding block; 10. Blocking plate; 101. Control rod; 102. Counterweight block. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 10 The present invention provides a technical solution: an acetylene gas production and purification device, comprising a purification tank 1, a replacement tank 6, an acetylene inlet pipe 2 and an acetylene outlet pipe 3 fitted onto the purification tank 1, and a new liquid inlet pipe 71, a new liquid outlet pipe 72, and a waste liquid recovery pipe 81 fitted onto the outside of the replacement tank 6, and further comprising: Waste liquid discharge pipe 5 and bearing rod 9 are installed outside the purification tank 1; A sealing plate 4 is installed inside the purification tank 1 to automatically discharge based on the degree of reaction of the silver nitrate solution; A positioning and reset mechanism for an adaptive positioning sealing plate 4 based on the discharge of silver nitrate solution is installed inside the bearing rod 9; An opening component that slides inside the displacement tank 6 to automatically add material based on the discharge capacity of the silver nitrate solution; A suspension plate 82 that slides on the inner wall of the replacement tank 6 to drive the sealing components and the positioning and resetting mechanism; The positioning and resetting mechanism includes a locking block 93 for positioning the sealing plate 4 and a slider 95 for driving the locking block 93 to retract. The opening component includes a blocking plate 10 that blocks the new liquid outlet pipe 72.

[0032] The purification tank 1, replacement tank 6, acetylene inlet pipe 2, acetylene outlet pipe 3, and waste liquid discharge pipe 5 are all made of 316L stainless steel, and their inner walls are lined with a polytetrafluoroethylene (PTFE) anti-corrosion layer. It should be noted that, given that prolonged contact between acetylene gas and metals such as copper and silver may generate explosive acetylene copper or acetylene silver, copper alloys are strictly prohibited from being used for any components in this device that come into direct contact with acetylene gas. The anti-corrosion layer effectively isolates the metal tank from the chemical corrosion of the silver nitrate solution, extending the equipment's service life, and simultaneously preventing metal ion contamination of the silver nitrate solution from affecting purification efficiency.

[0033] The waste liquid discharge pipe 5 is equipped with a conical filter screen at the inlet at the bottom of the purification tank 1. The filter screen has a pore size of 1-3mm and is used to intercept large particles of sediment to prevent pipe blockage. Specifically, the inner bottom wall of the purification tank 1 is a conical slag collection hopper structure, and its lower part is designed to open. After a period of use, the bottom can be opened to remove the sediment deposited at the bottom.

[0034] Acetylene is a flammable and explosive gas and is unstable under high pressure; therefore, this unit operates at low pressure to ensure safety. Too low a concentration of silver nitrate will reduce purification efficiency, while too high a concentration will increase costs and accelerate precipitation. Excessive temperature will accelerate the decomposition of silver nitrate; therefore, a cooling jacket can be optionally installed on the outer wall of the displacement tank 6 to maintain a stable reaction temperature through circulating cooling water. The acetylene gas flow rate is adaptively adjusted according to the liquid level in the purification tank 1 to ensure that the gas residence time in the solution is not too short, thus guaranteeing sufficient reaction of impurities.

[0035] In the specific implementation, one end of the acetylene inlet pipe 2 is connected to an external pipeline for supplying acetylene gas. The acetylene outlet pipe 3 is installed with the pipeline for the next step of drying acetylene. Acetylene gas enters the purification tank 1 through the acetylene inlet pipe 2 and comes into contact with the silver nitrate solution. The harmful gases in the acetylene react with the silver nitrate solution to generate solid impurities, thus achieving purification. The purified acetylene gas exits through the acetylene outlet pipe 3 and enters the next working procedure for drying. The new liquid inlet pipe 71 is connected to an external pipeline for supplying silver nitrate solution, and an electric valve is installed on the new liquid inlet pipe 71. The electric valve can be controlled by an external control system to supply silver nitrate solution to the new liquid inlet pipe 71. The waste liquid recovery pipe 81 is connected to an external pipeline for recovering the reacted silver nitrate solution. Similarly, an electric valve is installed on the waste liquid recovery pipe 81, which can be controlled when needed to discharge and recover the reacted silver nitrate solution. (The end of the waste liquid recovery pipe 81 is connected to a silver-containing waste liquid recovery and treatment unit, which includes a reduction reaction tank and a filter press. After the waste liquid enters the recovery and treatment unit, silver ions are reduced to metallic silver powder by adding a reducing agent (such as sodium borohydride or iron powder), and then the solid and liquid are separated by the filter press. The filter cake is sold as silver-containing hazardous waste or resource, and the filtrate is discharged or reused after testing and meeting the standards. This device transports the waste liquid through a closed pipeline, avoiding the risk of leakage of silver-containing waste liquid during the transfer process, and meets environmental compliance requirements.)

[0036] One end of the new liquid discharge pipe 72 extends into the interior of the purification tank 1 and is fixedly connected to the purification tank 1; The blocking plate 10 blocks one end of the new liquid outlet pipe 72 that extends into the replacement tank 6.

[0037] In practice, the new silver nitrate solution is injected into the internal storage of the replacement tank 6 through the new liquid inlet pipe 71. The blocking plate 10 blocks the new liquid inlet pipe 71, so the new silver nitrate solution will not automatically enter the purification tank 1. When the blocking plate 10 stops blocking the new liquid inlet pipe 71, the new silver nitrate solution will be automatically injected into the purification tank 1 through the new liquid inlet pipe 71.

[0038] The bottom of the sealing plate 4 is fixedly connected to a first spring 41, and the bottom of the first spring 41 is fixedly connected to the inner bottom wall of the purification tank 1. The top of the sealing plate 4 is a slope; The outer wall of the sealing plate 4 is provided with a slot 42.

[0039] In practice, when acetylene gas enters the purification tank 1, it passes through a silver nitrate solution. The harmful gases in the acetylene gas react with the silver nitrate solution to generate solid impurities. As the reaction continues, the amount of precipitate gradually increases, and the weight on the sealing plate 4 also gradually increases. Therefore, the sealing plate 4 will compress the first spring 41, and the position of the sealing plate 4 will gradually decrease.

[0040] One end of the waste liquid discharge pipe 5 extends into the interior of the replacement tank 6 and is fixedly connected to the replacement tank 6.

[0041] In practice, when the sealing plate 4 descends to expose the waste liquid discharge pipe 5, the silver nitrate solution and impurities inside the purification tank 1 will flow out together from the waste liquid discharge pipe 5.

[0042] The positioning and reset mechanism also includes a retraction groove 91 opened at one end of the bearing rod 9, and the outer wall of the locking block 93 is slidably connected to the inside of the retraction groove 91; One end of the locking block 93 is fixedly connected to a second spring 92, and one end of the second spring 92 is fixedly connected to the inner wall of the retraction groove 91. The top of the end of the card block 93 extending outside the retraction groove 91 is sloped.

[0043] In practice, when the sealing plate 4 descends, it presses down on the locking block 93. The inclined surface at the top of the locking block 93 acts as a guide, so the locking block 93 moves into the retraction groove 91 under the force, allowing the sealing plate 4 to continue moving downward. When the locking groove 42 aligns with the position of the locking block 93, the locking block 93 is reset by the elastic force of the second spring 92. One end of the locking block 93 extending from the bearing rod 9 is inserted into the interior of the locking groove 42, and the locking block 93 fixes the sealing plate 4. At this time, the silver nitrate solution after the reaction continues to flow out through the waste liquid discharge pipe 5. Even if the weight of the silver nitrate solution after the reaction gradually decreases, the sealing plate 4 will not be reset by the first spring 41.

[0044] One end of the locking block 93 is fixedly connected to a steel rope 94; The inner wall of the retraction groove 91 is provided with a through groove, and the steel rope 94 is slidably connected to the through groove. One end of the steel rope 94 is fixedly connected to a slider 95, and one side of the slider 95 is slidably connected to one end of the bearing rod 9.

[0045] The displacement tank 6 has a new liquid chamber 7 and a recovery chamber 8 inside.

[0046] In practice, the new liquid chamber 7 stores a new silver nitrate solution, while the recovery chamber 8 stores the silver nitrate solution after the reaction and the impurities generated during the reaction.

[0047] The opening component also includes a control rod 101 disposed inside the recovery chamber 8; The inner top wall of the recovery chamber 8 is provided with a channel; The top of the control rod 101 passes through the channel and extends into the interior of the new liquid chamber 7, and the control rod 101 is slidably connected to the channel.

[0048] In practice, after the silver nitrate solution and its reaction-generated impurities enter the recovery chamber 8, the suspension plate 82 will float upwards with the liquid level (e.g., Figure 4 As shown), when most of the silver nitrate solution and the impurities generated by its reaction enter the recovery chamber 8, the suspension plate 82 will float higher with the liquid level and push the control rod 101 upwards, causing the control rod 101 to move upwards (as shown). Figure 5 (As shown).

[0049] The bottom of the blocking plate 10 is fixedly connected to one end of the control rod 101 that extends into the new liquid chamber 7; The other end of the control lever 101 is fixedly connected to a counterweight 102.

[0050] In practice, when the control lever 101 moves upward, it will cause the blocking plate 10 to move upward and no longer block the new liquid outlet pipe 72. The new silver nitrate solution stored in the new liquid chamber 7 will enter the interior of the purification tank 1 through the new liquid outlet pipe 72. Therefore, before all the silver nitrate solution in the purification tank 1 is discharged, the new silver nitrate solution has been added to the interior of the purification tank 1. The capacity of the silver nitrate solution in the purification tank 1 is always sufficient to react and purify the acetylene gas.

[0051] The suspension plate 82 is composed of a ring and a disk, and the ring and the disk are fixedly connected by a connecting rod; A counterweight ring 83 is fixedly connected to the bottom of the suspension plate 82.

[0052] In practice, when the silver nitrate solution and impurities after the reaction are discharged from the replacement tank 6 for recycling, the inside of the recycling chamber 8 is empty. Therefore, the suspension plate 82 can return to the bottom of the recycling chamber 8. The counterweight ring 83 increases the weight of the suspension plate 82 to prevent the suspension plate 82 from getting stuck in the middle of the inside of the recycling chamber 8.

[0053] Working principle: Acetylene gas enters the purification tank 1 through acetylene inlet pipe 2 and comes into contact with silver nitrate solution. The harmful gases in acetylene react with the silver nitrate solution to generate solid impurities, thus achieving purification. The purified acetylene gas exits through acetylene outlet pipe 3 and enters the next working procedure for drying.

[0054] The harmful gas in acetylene gas will react with silver nitrate solution to generate solid impurities. As the reaction continues, the precipitate will gradually increase, the total mass of silver nitrate solution will increase, and the weight on sealing plate 4 will gradually increase. Sealing plate 4 compresses the first spring 41, so the position of sealing plate 4 will gradually decrease.

[0055] When the locking block 93 is subjected to the downward force of the sealing plate 4, it will move into the retraction groove 91. Therefore, the sealing plate 4 can continue to move downward. When the locking groove 42 moves downward to the same height as the locking block 93, the locking groove 42 aligns with the locking block 93. The locking block 93 is reset by the elastic force of the second spring 92 and inserted into the locking groove 42. The locking block 93 plays a role in fixing the sealing plate 4.

[0056] It should be noted that because the position of the sealing plate 4 has been fixed by the locking block 93, the silver nitrate solution after the reaction continues to flow out through the waste liquid discharge pipe 5. Therefore, the weight of the silver nitrate solution after the reaction gradually decreases, and the sealing plate 4 will not be reset by the first spring 41. Thus, the silver nitrate solution after the reaction can be continuously discharged.

[0057] like Figure 4-7 As shown, when most of the silver nitrate solution and the impurities generated by its reaction enter the recovery chamber 8, the suspension plate 82 will float higher with the liquid level and push the control rod 101 upward, causing the control rod 101 to move upward and the blocking plate 10 to no longer block the new liquid outlet pipe 72. The new silver nitrate solution stored in the new liquid chamber 7 will enter the purification tank 1 through the new liquid outlet pipe 72. Therefore, before all the silver nitrate solution in the purification tank 1 is discharged, the new silver nitrate solution has been added to the purification tank 1. The capacity of the silver nitrate solution in the purification tank 1 is always sufficient to react and purify the acetylene gas, so that the acetylene purification work can be carried out without stopping when the silver nitrate solution is replaced.

[0058] The silver nitrate solution continues to enter the recovery chamber 8, and the suspension plate 82 continues to move upward. The slider 95 is blocked by the suspension plate 82 and moves upward along with the suspension plate 82. The slider 95 pulls the locking block 93 through the steel rope 94. The locking block 93 is pulled into the retraction groove 91 by the steel rope 94. Therefore, the locking block 93 no longer positions the sealing plate 4. At this time, the sealing plate 4 can be reset by the elastic force of the first spring 41. The new silver nitrate solution in the new liquid chamber 7 can be continuously added into the purification tank 1. The new silver nitrate solution obtained in the purification tank 1 can continue to purify the acetylene gas.

[0059] It should also be noted that the silver nitrate solution stored inside the new liquid chamber 7 is the silver nitrate capacity required for purification in the purification tank 1. Even if the new silver nitrate solution flows entirely into the purification tank 1, it will not cause the sealing plate 4 to move downwards to expose the waste liquid discharge pipe 5. Only when there are many impurities in the silver nitrate solution reaction can its weight cause the sealing plate 4 to move downwards. When the sealing plate 4 moves downwards to expose the waste liquid discharge pipe 5, the waste liquid discharge pipe 5 is already discharging the silver nitrate solution after the reaction, but acetylene gas is still being emitted, indicating that impurities are still being generated in the silver nitrate solution. Since the distance between the waste liquid discharge pipe 5 and the support rod 9 is close, the sealing plate 4 will continue to move downwards a short distance due to the continuous generation of impurities. At this time, the slot 42 will align with the locking block 93, and the locking block 93 can position the sealing plate 4, preventing the sealing plate 4 from resetting before it has descended to the position of the support rod 9.

[0060] The solid impurities generated by the reaction of harmful gases in acetylene gas with silver nitrate solution are small-volume solids, such as granules and flocculents, which will not clog the waste liquid discharge pipe 5. Furthermore, these impurities tend to settle to the bottom. Therefore, when the silver nitrate solution after the reaction is discharged, more impurities are at the bottom and can be discharged along with the solution first.

[0061] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. An acetylene gas production and purification apparatus, comprising a purification tank (1), a displacement tank (6), an acetylene inlet pipe (2) and an acetylene outlet pipe (3) disposed on the purification tank (1), and a fresh liquid inlet pipe (71), a fresh liquid outlet pipe (72), and a waste liquid recovery pipe (81) disposed outside the displacement tank (6), characterized in that: Also includes: Waste liquid discharge pipe (5) is connected between purification tank (1) and displacement tank (6), and the displacement tank (6) is provided with a new liquid chamber (7) for storing silver nitrate solution and a recovery chamber (8) for storing reaction waste liquid from purification tank (1). The new liquid discharge pipe (72) is connected to the new liquid chamber (7) and the inner cavity of purification tank (1), and the waste liquid discharge pipe (5) is connected to the recovery chamber (8) and the inner cavity of purification tank (1). The sealing plate (4) is sealed and located inside the purification tank (1) at a position lower than the acetylene inlet pipe (2). The sealing plate (4) moves downward as the reaction product of the silver nitrate solution increases in weight, and the waste liquid discharge pipe (5) is opened to automatically discharge the waste liquid. Furthermore, an elastic element is provided below the sealing plate (4) to drive the sealing plate (4) to move upward and reset. The suspension plate (82) is located in the recovery chamber (8), and its movement is as the waste liquid level rises and falls. An automatic liquid addition mechanism is located between the new liquid chamber (7) and the recovery chamber (8). Its movement mode is to rise and fall with the rise and fall of the suspension plate (82), drive the opening and closing of the new liquid outlet pipe (72) port, and automatically control the action of replenishing new liquid. The support rod (9) is connected between the purification tank (1) and the replacement tank (6) and is located below the waste liquid discharge pipe (5). The support rod (9) is provided with a positioning and reset mechanism for locking the sealing plate (4) after it has descended. The positioning and reset mechanism includes a slider (95) located in the recovery chamber (8), which moves upward with the suspension plate (82) and controls the positioning and reset mechanism to release the locking of the sealing plate (4).

2. The acetylene gas production and purification apparatus according to claim 1, characterized in that: One end of the new liquid outlet pipe (72) extends into the interior of the purification tank (1) and is fixedly connected to the purification tank (1). The automatic liquid addition mechanism includes a blocking plate (10), which blocks one end of the new liquid outlet pipe (72) extending into the replacement tank (6).

3. The acetylene gas production and purification apparatus according to claim 1, characterized in that: The elastic element is a first spring (41) fixedly connected to the bottom of the sealing plate (4). The bottom of the first spring (41) is fixedly connected to the inner bottom wall of the purification tank (1). The top of the sealing plate (4) is an inclined surface, and the outer wall of the sealing plate (4) is provided with a slot (42).

4. The acetylene gas production and purification apparatus according to claim 1, characterized in that: One end of the waste liquid discharge pipe (5) extends into the interior of the replacement tank (6) and is fixedly connected to the replacement tank (6).

5. The acetylene gas production and purification apparatus according to claim 1, characterized in that: The positioning and resetting mechanism includes a retraction groove (91) opened at one end of the bearing rod (9), the outer wall of the locking block (93) is slidably connected to the inside of the retraction groove (91), one end of the locking block (93) is fixedly connected to a second spring (92), and one end of the second spring (92) is fixedly connected to the inner side wall of the retraction groove (91), and the top of the end of the locking block (93) extending out of the retraction groove (91) is an inclined surface.

6. The acetylene gas production and purification apparatus according to claim 5, characterized in that: One end of the card block (93) is fixedly connected to a steel rope (94), the inner wall of the retraction groove (91) is provided with a through groove, and the steel rope (94) is slidably connected to the through groove. One end of the steel rope (94) is fixedly connected to a slider (95), and one side of the slider (95) is slidably connected to one end of the bearing rod (9).

7. An acetylene gas production and purification apparatus according to claim 2, characterized in that: The automatic liquid addition mechanism also includes a control rod (101) connected to the blockage plate (10) and extending into the recovery chamber (8). The inner top wall of the recovery chamber (8) has a channel. The top of the control rod (101) passes through the channel and extends into the new liquid chamber (7). The control rod (101) is slidably connected to the channel.

8. An acetylene gas production and purification apparatus according to claim 7, characterized in that: The bottom of the blocking plate (10) is fixedly connected to one end of the control rod (101) extending into the new liquid chamber (7), and the other end of the control rod (101) is fixedly connected to a counterweight (102).

9. An acetylene gas production and purification apparatus according to claim 1, characterized in that: The suspension plate (82) is composed of a ring and a disk, and the ring and the disk are fixedly connected by a connecting rod. A counterweight ring (83) is fixedly connected to the bottom of the suspension plate (82).

Images