A dry process for recycling carbide slag slurry water in acetylene production

Abstract

The present invention discloses a dry process for recycling carbide slag slurry water of calcium carbide, which uses a stripping device to treat the slag slurry water containing acetylene and recover acetylene gas. It includes a storage tank and a device main body. A large amount of slag slurry water is stored in the storage tank. A partition seat is arranged on the upper end surface of the storage tank, and a base is fixedly installed on the upper end of the partition seat. The device main body is located on the upper end of the base. A centrifugal motor is installed at the middle position of the top of the device main body. A stripping chamber is arranged inside the device main body. The output end of the centrifugal motor is connected to a first rotating rod, and the lower end of the first rotating rod extends into the bottom of a liquid sprinkler. For the dry process for recycling carbide slag slurry water of calcium carbide of the present invention, after enough liquid is collected in the liquid collecting tank, the first solenoid valve is closed, and the second solenoid valve is opened, so that the suction pump directly extracts the slag slurry water from the liquid collecting tank for a secondary stripping reaction, improving the utilization rate of the slag slurry water, being applicable to different working conditions and bringing a better application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of preparing acetylene by the carbide method, and particularly relates to a dry process for recycling slurry water of carbide acetylene residue. Background Art

[0002] Calcium carbide is an important raw material for carbide method PVC enterprises. A large amount of acetylene gas remains in the carbide slag slurry produced by its hydrolysis. Allowing the volatilization and loss of the remaining acetylene in the carbide slag slurry not only causes great waste of resources, but also poses a great safety hazard due to the flammable and explosive characteristics of acetylene gas.

[0003] At present, the well-known method for recovering acetylene from slag slurry is to safely recover and utilize the acetylene gas remaining in the carbide slag slurry through technological processes such as vacuum, stripping, and flash evaporation. Specifically, it is to recover the acetylene in the liquid dissolution and unreacted calcium carbide in the carbide slag slurry through a slag slurry acetylene stripping tower under a vacuum state, and send the recovered acetylene gas to an acetylene gas holder. However, the following technical problems are likely to occur in the operation of the existing process. First, the slag slurry water is prone to blockage at the suction pipe and low suction efficiency due to viscosity and sedimentation at the bottom of the pool. Second, the movement of water vapor lacks regularity, resulting in insufficient mixing with the slag slurry and low extraction efficiency of acetylene gas, causing waste of resources. Therefore, we propose a dry process for recycling slurry water of carbide acetylene residue. Summary of the Invention

[0004] The main purpose of the present invention is to provide a dry process for recycling slurry water of carbide acetylene residue, which can effectively solve the problems of low suction efficiency and low extraction efficiency of acetylene gas in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A dry process for recycling slurry water of carbide acetylene residue uses stripping equipment to treat the slurry water containing acetylene and recover acetylene gas, including a storage tank and a device main body. A large amount of slurry water is stored in the storage tank. A partition seat is arranged on the upper end surface of the storage tank, and a base is fixedly installed on the upper end of the partition seat. The device main body is located on the upper end of the base. A centrifugal motor is installed at the middle position of the top of the device main body. The output end of the centrifugal motor is connected to a first rotating rod. The lower end of the first rotating rod extends into the bottom of a liquid sprinkler and is welded to it. An annular baffle is arranged on the upper end of the liquid sprinkler, and a number of liquid outlet holes are evenly distributed around and at the bottom of the liquid sprinkler.

[0007] Preferably, a water vapor inlet pipe is installed at the position where the left end of the device main body communicates with the stripping chamber. A water vapor discharge pipe extends outward from the right end of the device main body, and an absorption hood is installed between the water vapor discharge pipe and the stripping chamber.

[0008] Preferably, a liquid collecting tank is provided inside the base and below the stripping chamber, and a liquid guiding port is arranged at the upper end of the liquid collecting tank.

[0009] Preferably, a suction pump is installed on the front end face of the equipment main body. A first suction pipe is connected to the liquid inlet of the suction pump. The first suction pipe passes through the partition seat and extends downward into the storage tank. A first electromagnetic valve is installed at a lower position of the first suction pipe. A second suction pipe is communicated in the middle of the first suction pipe, and a second electromagnetic valve is installed on the second suction pipe.

[0010] Preferably, a liquid injection conduit is connected to the liquid outlet of the suction pump. The liquid injection conduit extends into the equipment main body, and its end is located above the liquid sprinkler. The other end of the second suction pipe extends into the bottom of the liquid collecting tank.

[0011] Preferably, the lower end of the first suction pipe is fixed to the bottom of the storage tank through an anti-blocking cover. The cover surface of the anti-blocking cover is evenly distributed with gaps for the slag pulp water to enter and discharge.

[0012] Preferably, a stirring motor is installed at the middle position of the bottom surface of the storage tank. The upper end of the stirring motor is sealed. A second rotating rod is installed at the upper end of the stirring motor. The second rotating rod is located inside the anti-blocking cover.

[0013] Preferably, a triangular frame is welded on one side surface of the rotating rod, and a plurality of groups of stirring soft belts are longitudinally arranged at equal intervals inside the triangular frame.

[0014] Preferably, two feeding pipes are communicated at the upper end of the storage tank.

[0015] The present invention provides an improved dry method for recycling carbide slag pulp water. Compared with the prior art, it has the following significant improvements and advantages:

[0016] The slag pulp water flows along the pipeline and is injected into the liquid sprinkler from the liquid injection conduit. The liquid sprinkler makes a centrifugal motion, evenly sprinkles the slag pulp water inside it outward, sprays the liquid to different positions of the stripping chamber from a plurality of liquid outlet holes, and is evenly mixed with the water vapor entering from the water vapor inlet pipe, making full contact to improve the stripping effect.

[0017] After enough liquid is collected in the liquid collecting tank, close the first electromagnetic valve and open the second electromagnetic valve, so that the suction pump directly extracts the slag pulp water from the liquid collecting tank for a secondary stripping reaction to improve the utilization rate of the slag pulp water.

[0018] Start the stirring motor. The second rotating rod drives a plurality of groups of stirring soft belts to continuously make a circular motion. The stirring soft belts are evenly and vertically distributed with a large coverage area, and can fully stir the slurry in the anti-blocking cover in time to make it undergo dynamic surging without precipitation and siltation, facilitating the first suction pipe to quickly suck a large amount of slag pulp water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a dry calcium carbide acetylene slurry water recycling process of the present invention;

[0020] Figure 2 This is an internal view of the main body of the equipment of the present invention;

[0021] Figure 3 This is a specific structural diagram of the anti-blocking cover of the present invention.

[0022] In the figure: 1, storage tank; 2, partition seat; 3, base; 4, main body of the equipment; 5, centrifugal motor; 6, stripping chamber; 7, first rotating rod; 8, liquid sprinkler; 9, annular baffle; 10, liquid outlet hole; 11, steam inlet pipe; 12, absorption hood; 13, steam discharge pipe; 14, liquid collection tank; 15, suction pump; 16, first suction pipe; 17, second suction pipe; 18, gap; 19, stirring motor; 20, second rotating rod; 21, tripod; 22, stirring flexible belt; 23, feeding pipe. SPECIFIC EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] As Figures 1-3 shown, this embodiment provides a dry calcium carbide acetylene slurry water recycling process, which uses a stripping device to treat the slurry water containing acetylene and recover acetylene gas. It includes a storage tank 1 and a main body of the equipment 4. A large amount of slurry water is stored in the storage tank 1. A partition seat 2 is arranged on the upper end surface of the storage tank 1, and a base 3 is fixedly installed on the upper end of the partition seat 2. The main body of the equipment 4 is located on the upper end of the base 3. A centrifugal motor 5 is installed at the middle position of the top of the main body of the equipment 4. A stripping chamber 6 is arranged inside the main body of the equipment 4. The output end of the centrifugal motor 5 is connected to a first rotating rod 7. The lower end of the first rotating rod 7 extends into the bottom of the liquid sprinkler 8 and the two are welded. An annular baffle 9 is arranged at the upper end of the liquid sprinkler 8, and a number of groups of liquid outlet holes 10 are evenly distributed around and at the bottom of the liquid sprinkler 8.

[0025] In this embodiment, a steam inlet pipe 11 is installed at the position where the left end of the main body of the equipment 4 communicates with the stripping chamber 6. The right end of the main body of the equipment 4 extends outward to be provided with a steam discharge pipe 13. An absorption hood 12 is installed between the steam discharge pipe 13 and the stripping chamber 6. An induced draft fan is installed at the steam discharge pipe 13 to timely recover steam and acetylene gas.

[0026] In this embodiment, a liquid collecting tank 14 is provided inside the base 3 and below the stripping chamber 6, and a liquid guiding port is arranged at the upper end of the liquid collecting tank 14.

[0027] In this embodiment, a suction pump 15 is installed on the front end face of the equipment main body 4. A first suction pipe 16 is connected to the liquid inlet of the suction pump 15, and the first suction pipe 16 passes through the partition seat 2 and extends downward into the storage tank 1.

[0028] Furthermore, a first electromagnetic valve is installed at a lower position of the first suction pipe 16. A second suction pipe 17 is communicated in the middle of the first suction pipe 16, and a second electromagnetic valve is installed on the second suction pipe 17.

[0029] Furthermore, a liquid injection conduit is connected to the liquid outlet of the suction pump 15. The liquid injection conduit extends into the equipment main body 4, and its end is located above the liquid sprinkler 8. The other end of the second suction pipe 17 extends into the bottom of the liquid collecting tank 14.

[0030] In this embodiment, the lower end of the first suction pipe 16 is fixed to the bottom of the storage tank 1 through an anti-blocking cover 24. The cover surface of the anti-blocking cover 24 is evenly distributed with gaps 18 for the slag slurry water to enter and discharge.

[0031] In this embodiment, a stirring motor 19 is installed at the middle position of the bottom surface of the storage tank 1. The upper end of the stirring motor 19 is sealed. A second rotating rod 20 is installed at the upper end of the stirring motor 19, and the second rotating rod 20 is located inside the anti-blocking cover 24.

[0032] Furthermore, a triangular frame 21 is welded to one side surface of the second rotating rod 20. A plurality of groups of stirring flexible belts 22 are longitudinally arranged at equal intervals inside the triangular frame 21, with better flexible stirring effect and less noise.

[0033] In this embodiment, two feeding pipes 23 are communicated at the upper end of the storage tank 1.

[0034] In the use of this embodiment, the slurry water generated in calcium carbide production is continuously supplied into the storage tank 1 through the feeding pipe 23. First, open the first solenoid valve, close the second solenoid valve, and start the suction pump 15. The slurry water in the storage tank 1 is extracted through the first suction pipe 16. The slurry water flows along the pipeline and is injected into the sprinkler 8 through the liquid injection conduit. At this time, start the centrifugal motor 5 to drive the sprinkler 8 to perform a centrifugal motion, and evenly sprinkle the slurry water inside it. The slurry water is sprinkled from a number of groups of liquid outlet holes 10 to different positions of the stripping chamber 6, and is evenly mixed with the water vapor entering from the water vapor inlet pipe 11 and fully contacted. Then, the water vapor and the extracted acetylene gas are sucked into the water vapor discharge pipe 13 from the absorption hood 12 and transported to the condenser for gas-liquid separation. The remaining slurry water flows into the liquid collection tank 14 from the liquid guide port. After enough liquid is collected in the liquid collection tank 14, close the first solenoid valve and open the second solenoid valve, so that the suction pump 15 directly extracts the slurry water from the liquid collection tank 14 for a secondary stripping reaction to improve the utilization rate of the slurry water. After repeating this cycle many times, the slurry water is released from the liquid collection tank 14.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry process for recycling the water of acetylene slag slurry of calcium carbide, characterized in that: Using a stripping device to treat slurry water containing acetylene and recover acetylene gas. The stripping device includes a storage tank (1) and a device main body (4). The storage tank (1) stores the slurry water. A partition seat (2) is arranged on the upper end surface of the storage tank (1). A base (3) is fixedly installed on the upper end of the partition seat (2). The device main body (4) is located on the upper end of the base (3). A centrifugal motor (5) is installed at the middle position of the top of the device main body (4). A stripping chamber (6) is arranged inside the device main body (4). The output end of the centrifugal motor (5) is connected to a first rotating rod (7). The lower end of the first rotating rod (7) extends into the bottom of a liquid sprinkler (8) and the two are welded. An annular baffle (9) is arranged on the upper end of the liquid sprinkler (8). A number of liquid outlet holes (10) are evenly distributed around and at the bottom of the liquid sprinkler (8); A steam inlet pipe (11) is installed at the position where the left end of the device main body (4) communicates with the stripping chamber (6). A steam discharge pipe (13) extends outward from the right end of the device main body (4). An absorption hood (12) is installed between the steam discharge pipe (13) and the stripping chamber (6). A liquid collecting tank (14) is opened inside the base (3) and below the stripping chamber (6). A liquid guiding port is arranged at the upper end of the liquid collecting tank (14). The process includes: pumping the slurry water in the storage tank (1) into the liquid sprinkler (8), starting the centrifugal motor (5) to drive the liquid sprinkler (8) to perform centrifugal motion, spraying the slurry water inside it to different positions in the stripping chamber (6), uniformly mixing it with the steam entering from the steam inlet pipe (11), fully contacting, and then the steam and the extracted acetylene gas are sucked into the steam discharge pipe (13) from the absorption hood (12) and transported to a condenser for gas-liquid separation. The remaining slurry water flows into the liquid collecting tank (14) from the liquid guiding port. After enough liquid is collected in the liquid collecting tank (14), the slurry water is directly pumped out from the liquid collecting tank (14) for a secondary stripping reaction.

2. The dry acetylene slag slurry water recycling process for calcium carbide according to claim 1, characterized in that: A suction pump (15) is installed on the front end surface of the device main body (4). A first suction pipe (16) is connected to the liquid inlet of the suction pump (15). The first suction pipe (16) passes through the partition seat (2) and extends downward into the storage tank (1). A first solenoid valve is installed at the lower position of the first suction pipe (16). A second suction pipe (17) is communicated in the middle of the first suction pipe (16). A second solenoid valve is installed on the second suction pipe (17).

3. A dry process for recycling carbide slag slurry water according to claim 2, characterized in that: A liquid injection conduit is connected to the liquid outlet of the suction pump (15). The liquid injection conduit extends into the device main body (4) and its end is located above the liquid sprinkler (8). The other end of the second suction pipe (17) extends into the bottom of the liquid collecting tank (14).

4. A dry calcium carbide acetylene slag slurry water reuse process according to claim 3, characterized in that: The lower end of the first suction pipe (16) is fixed to the bottom of the storage tank (1) through an anti-blocking cover (24). The cover surface of the anti-blocking cover (24) is evenly distributed with gaps (18) for the slurry water to enter and discharge.

5. A dry process for recycling carbide slag slurry water according to claim 4, characterized in that: A stirring motor (19) is installed at the middle position of the bottom surface of the storage tank (1). The upper end of the stirring motor (19) is sealed, and a second rotating rod (20) is installed at the upper end of the stirring motor (19). The second rotating rod (20) is located inside the anti-blocking cover (24).

6. The dry acetylene slag slurry water recycling process for calcium carbide according to claim 5, characterized in that: A triangular frame (21) is welded to one side surface of the second rotating rod (20), and a number of groups of stirring flexible belts (22) are longitudinally arranged at equal intervals inside the triangular frame (21).

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