Purification device for acetylene production

Abstract

The utility model relates to the technical field of acetylene production, in particular to a purification device for acetylene production, which is characterized in that aeration grids are rotationally connected in a purification tower and a neutralization tower, a plurality of aeration holes are formed in the aeration grids, porous plates are fixedly connected in the purification tower and the neutralization tower and positioned above the aeration grids, and the aeration holes are formed in the porous plates. The other end of the conveying pipe is connected with the air outlet pipe of the purification tower, the conveying pipe is connected with a temperature sensor, and the air inlet pipe is sequentially connected with an electromagnetic valve and a filter box; the temperature sensor is in communication connection with the controller, and the electromagnetic valve is controlled by the controller. The rotary aeration grids are arranged in the purification tower and the neutralization tower, and the porous plate is fixed above the aeration grids, so that acetylene gas can be in full contact with a solution, and when the temperature of acetylene is detected to be too high, the controller can automatically control the electromagnetic valve to be closed, so that acetylene with too high water content is prevented from entering the purification tower; and potential safety hazards and product quality reduction in the production process are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of acetylene production, in particular to a purification device for acetylene production. Background Art

[0002] Acetylene is an organic compound with the chemical formula C 2 H 2 , commonly known as wind coal or calcium carbide gas, is the smallest member of the alkyne compound family. It is a colorless gas at normal temperature and pressure, slightly soluble in water, soluble in ethanol, acetone, chloroform, benzene, miscible in ether, and is one of the important raw materials for organic synthesis, as well as a monomer for synthetic rubber, fibers, and plastics. It can also be used for oxyacetylene welding and cutting. Pure acetylene is a colorless, odorless, flammable gas. Currently, the most commonly used method for producing acetylene is the calcium carbide method. However, acetylene produced from calcium carbide is toxic due to the mixture of hydrogen sulfide (H2S), phosphine (PH3), and arsine, and has a special odor. In addition, there are some particulate impurities after acetylene production. Therefore, it is usually necessary to purify acetylene gas during the acetylene production process to remove impurities in the acetylene gas. In the existing acetylene gas purification equipment, acetylene and the solution do not come into full contact during use, resulting in incomplete impurity removal. In order to avoid excessive water content in the produced acetylene gas, it is usually necessary to detect the temperature of the acetylene gas during the purification process. When the detected temperature is too high, the purification needs to be stopped immediately. However, manual operation is prone to problems such as untimely stopping of gas supply, leading to potential safety hazards in the production process and a decrease in product quality. Therefore, it is necessary to develop a purification device for acetylene production that can make acetylene and the solution come into full contact, improve the purification effect, automatically stop purification when the water content is too high, and ensure the gas quality. Summary of the Utility Model

[0003] In view of the above technical problems, the utility model provides a purification device for acetylene production that can make acetylene and the solution come into full contact, improve the purification effect, automatically stop purification when the water content is too high, and ensure the gas quality, so as to solve the problems of incomplete purification of the existing acetylene purification device, potential safety hazards and low product quality caused by untimely manual stopping of purification.

[0004] To solve the above technical problems, a purification device for acetylene production according to the present utility model includes a purification tower and a neutralization tower. The tops of the purification tower and the neutralization tower are both connected with air outlet pipes, and the bottoms are both connected with liquid discharge pipes. Aeration grilles are rotatably connected inside the purification tower and the neutralization tower. A plurality of air holes are formed in the aeration grilles. Porous plates are fixedly connected above the aeration grilles inside the purification tower and the neutralization tower. One end of the aeration grille is connected with a rotary joint through a pipe, and the other end is in transmission connection with a motor through a rotating shaft. The other end of the rotary joint located in the purification tower is connected with an air inlet pipe, and the other end of the rotary joint located in the neutralization tower is connected with a conveying pipe. The other end of this conveying pipe is connected with the air outlet pipe of the purification tower. A temperature sensor is connected to the conveying pipe. An electromagnetic valve and a filter box are successively connected to the air inlet pipe. The lower end of the liquid discharge pipe is connected with a collection box, and a valve is connected to the liquid discharge pipe. It further includes a controller. The temperature sensor is in communication connection with the controller, and the electromagnetic valve is controlled by the controller.

[0005] Further, motors are fixedly connected to one side of the purification tower and the neutralization tower respectively. The output shaft of the motor is fixedly connected with a driving wheel, and the end of the rotating shaft is fixedly connected with a driven wheel. The driving wheel and the driven wheel are in transmission connection through a belt.

[0006] Further, a water absorption layer is detachably connected above the porous plate inside the neutralization tower.

[0007] Further, the cross-section of the porous plate is in an inverted "V" shape structure.

[0008] Further, the porous plate is made of a corrosion-resistant material and is provided with a number of dense through holes.

[0009] Further, a filter plate is detachably connected inside the filter box.

[0010] Further, the water absorption layer is filled with one of silica gel or activated carbon.

[0011] The present utility model has the following advantages compared with the prior art:

[0012] The present utility model sets a purification tower and a neutralization tower to remove impurities in acetylene. By setting a rotating aeration grille inside the purification tower and the neutralization tower and fixing a porous plate above the aeration grille, it can make the acetylene gas fully contact with the solution, improve the impurity removal effect. And a temperature sensor is set on the conveying pipe and an electromagnetic valve is set on the air inlet pipe. When it detects that the temperature of acetylene is too high, the controller can automatically control the electromagnetic valve to close, avoiding the entry of acetylene with too high water content into the purification tower, and avoiding potential safety hazards and product quality reduction during the production process. By setting a water absorption layer inside the neutralization tower, it can dry the acetylene gas and ensure the quality of acetylene. Description of the Drawings

[0013] Figure 1 This is a schematic structural diagram of the present utility model.

[0014] In the figure: 1, intake pipe; 2, purification tower; 3, neutralization tower; 4, conveying pipe; 5, temperature sensor; 6, aeration grid; 7, rotary joint; 8, motor; 9, driving wheel; 10, driven wheel; 11, belt; 12, perforated plate; 13, collection box; 14, valve; 15, water absorption layer; 16, outlet pipe; 17, filter box; 18, solenoid valve. Specific embodiments

[0015] The present utility model will be further described below in conjunction with the accompanying drawings.

[0016] As Figure 1 shown, a purification device for acetylene production includes a purification tower 2 and a neutralization tower 3. The tops of the purification tower 2 and the neutralization tower 3 are both connected with an outlet pipe 16, and the bottoms are both connected with a drain pipe. An aeration grid 6 is rotatably connected inside the purification tower 2 and the neutralization tower 3. A plurality of aeration holes are spaced apart on the aeration grid 6. A perforated plate 12 is fixedly connected above the aeration grid 6 inside the purification tower 2 and the neutralization tower 3. One end of the aeration grid 6 extends outside the purification tower 2 and the neutralization tower 3 through a pipeline and is connected to a rotary joint 7, and the other end extends outside the purification tower 2 and the neutralization tower 3 through a rotating shaft and is in transmission connection with a motor 8. The pipeline and the rotating shaft are respectively rotatably connected to the purification tower 2 and the neutralization tower 3 through a sealed bearing. The other end of the rotary joint 7 on one side of the purification tower 2 is connected to the intake pipe 1, and the other end of the rotary joint 7 on one side of the neutralization tower 3 is connected to the conveying pipe 4. The other end of the conveying pipe 4 is connected to the outlet pipe 16 at the top of the purification tower 2. A temperature sensor 5 is connected to the conveying pipe 4. An electromagnetic valve 18 and a filter box 17 are successively connected to the intake pipe 1. The lower end of the drain pipe is connected to the collection box 13, and a valve 14 is connected to the drain pipe; it further includes a controller. The temperature sensor 5 is in communication connection with the controller, and the electromagnetic valve 18 is controlled by the controller. It should be noted that an injection pipe is connected to the middle of the purification tower 2 and the neutralization tower 3 to facilitate injecting solution into them.

[0017] In order to drive the aeration grid 6 to rotate stably by the motor 8, the motors 8 are fixedly connected to the outside of the purification tower 2 and the neutralization tower 3 through motor bases and bolts. The output shaft of the motor 8 is fixedly connected with a driving wheel 9, and the end of the rotating shaft is fixedly connected with a driven wheel 10. The driving wheel 9 and the driven wheel 10 are in transmission connection through a belt 11. It should be noted that in this embodiment, the output shaft of the motor 8 and the rotating shaft can also be connected by a chain and sprocket transmission method, or can be connected by meshing gears or bevel gears, as long as the rotating shaft can be driven to rotate by the motor 8.

[0018] In order to further dry the acetylene gas after neutralization and ensure the quality of the acetylene gas, a water absorption layer 15 is detachably connected above the porous plate 12 in the neutralization tower 3. In this embodiment, in order to ensure the water absorption performance and facilitate the replacement of the water absorption material, the water absorption layer 15 is composed of a storage box with through holes. A sliding groove is provided in the neutralization tower 3, and the storage box is slidably clamped with the sliding groove. A box door is hinged on one side of the neutralization tower 3 at the corresponding position of the storage box. One of silica gel or activated carbon is filled in the storage box. In this embodiment, silica gel is selected as the water absorption material.

[0019] In order to increase the contact area between the acetylene gas and the solution, the cross section of the porous plate 12 is in an inverted "V" shape structure. In order to prevent the solution from corroding the porous plate 102, the porous plate 12 is made of a corrosion-resistant material and is provided with a number of dense through holes. In this embodiment, the porous plate 12 is made of alumina ceramic.

[0020] In order to facilitate the replacement of the filter plate, a filter plate is detachably connected in the filter box 17. The filter box 17 is provided with a card slot, and the filter plate is slidably clamped in the card slot. A box door is hinged at the corresponding position of the filter box 17.

[0021] It should be noted that in this embodiment, H 2 SO 4 is added to the purification tower 2 2 to remove H 3 S, PH

[0022] and other impurities in the acetylene. However, a small amount of acid mist will be formed during the reaction process in the purification tower 2. Therefore, NaOH is added to the neutralization tower 3 for a neutralization reaction to remove the acid mist and improve the quality of the acetylene gas.

[0023] 2H 2 SO 4 +PH 3 =H 3 PO 4 +2H 2 0+SO 2 +S; H 2 SO 4 +H 2 S=SO 2 +2H 2 O+S.

[0024] During the reaction process in the purification tower, a small amount of acid forms acid mist, and then it is neutralized in the neutralization tower. The reaction formula is as follows:

[0025] H 3 PO 4 +3NaOH=Na 3 PO 4 +3H 2O; H 2 SO 4 + 2NaOH = Na 2 SO 4 + 2H 2 O.

[0026] It should be noted that in this embodiment, when adding H 2 SO 4 to the purification tower 2, the addition amount of H 2 SO 4 should submerge the perforated plate 12. Similarly, when adding NaOH to the neutralization tower 3, the addition amount of NaOH should submerge the perforated plate 12, but should not contact the water absorption layer 15.

[0027] The working process of this embodiment is as follows:

[0028] When acetylene needs to be purified during the production process of acetylene gas, first add H 2 SO 4 to the purification tower 2 through the injection pipe. The addition amount of H 2 SO 4 submerges the perforated plate 12. Then add NaOH to the neutralization tower 3 through the injection pipe. The addition amount of NaOH should submerge the perforated plate 12. Open the solenoid valve 18, and convey acetylene gas into the filtration box 17 through the air inlet pipe 1. After the acetylene passes through the filtration box 17, the dust particles in it are filtered and removed. Then the acetylene gas enters the aeration grid 6 and exits through the aeration holes. Synchronously start the motor 8 to run. The motor 8 drives the driving wheel 9 to rotate, and drives the driven wheel 10 to rotate under the action of the belt 11, thereby driving the aeration grid 6 to rotate, so as to increase the contact between acetylene and H 2 SO 4 , ensuring that impurities such as H 2 S and PH 3 contained in acetylene fully react and are removed. When the acetylene rises and passes through the perforated plate 12, the contact area with the solution can be further increased, improving the impurity removal effect and efficiency. The purified gas enters the conveying pipe 4 from the air outlet pipe 16 of the purification tower 2, and then enters the aeration grid 6 of the neutralization tower 3 and exits through the aeration holes. After the gas fully reacts with NaOH, it passes through the water absorption layer 15 for drying, and the dried gas is sent to the compression station. When passing through the temperature sensor 5, the temperature of the gas is monitored. When the temperature is greater than 60 °C, it indicates that the water content of acetylene is too high, and a large amount of water enters the purification tower and contacts with the internal H 2 SO 4 to generate heat. At this time, the controller controls the solenoid valve 18 to close and stop the intake of gas.

Claims

1. A purification device for acetylene production, comprising a purification tower (2) and a neutralization tower (3), wherein the tops of the purification tower (2) and the neutralization tower (3) are both connected to an air outlet pipe (16) and the bottoms are both connected to a liquid discharge pipe, characterized in that: The purification tower (2) and the neutralization tower (3) are both rotatably connected with an aeration grid (6), and the aeration grid (6) is provided with a plurality of aeration holes. A porous plate (12) is fixedly connected above the aeration grid (6) in the purification tower (2) and the neutralization tower (3). One end of the aeration grid (6) is connected to a rotary joint (7) via a pipeline, and the other end is transmission-connected to a motor (8) via a rotating shaft. The other end of the rotary joint (7) located in the purification tower (2) is connected to an air inlet pipe (1), and the rotary joint (7) located in the neutralization tower (3) is connected to an air inlet pipe (1). The other end of the adapter (7) is connected to the delivery pipe (4), the other end of the delivery pipe (4) is connected to the outlet pipe (16) of the purification tower (2), the delivery pipe (4) is connected to a temperature sensor (5), the air inlet pipe (1) is connected to a solenoid valve (18) and a filter box (17) in sequence, the lower end of the drain pipe is connected to a collection box (13), and the drain pipe is connected to a valve (14); a controller is also included, the temperature sensor (5) is communicatively connected to the controller, and the solenoid valve (18) is controlled by the controller.

2. The purification device for acetylene production according to claim 1, characterized in that: The purification tower (2) and the neutralization tower (3) are both fixedly connected to one side with the motor (8), the output shaft of the motor (8) is fixedly connected to a driving wheel (9), the end of the rotating shaft is fixedly connected to a driven wheel (10), and the driving wheel (9) and the driven wheel (10) are connected to each other through a belt (11).

3. The purification device for acetylene production according to claim 1, characterized in that: A water absorption layer (15) is detachably connected above the porous plate (12) in the neutralization tower (3).

4. The purification device for acetylene production according to claim 1, characterized in that: The cross section of the porous plate (12) is in an inverted "V"-shaped structure.

5. The purification device for acetylene production according to claim 4, characterized in that: The porous plate (12) is made of corrosion-resistant material and is provided with a plurality of dense through holes.

6. The purification device for acetylene production according to claim 1, characterized in that: A filter plate is detachably connected inside the filter box (17).

7. The purification device for acetylene production according to claim 3, characterized in that: The water absorbing layer (15) is filled with one of silica gel and activated carbon.

Images