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CN-121988258-A - Carbide slag treatment device and method based on ultrasonic technology

CN121988258ACN 121988258 ACN121988258 ACN 121988258ACN-121988258-A

Abstract

The invention relates to the technical field of calcium carbide process polyvinyl chloride production, and discloses a calcium carbide slag treatment device and method based on an ultrasonic technology. The device comprises a carbide slag bin, a processor, an ultrasonic transducer, a stirrer, a cooler, an acetylene cabinet, a water collecting tank, a screw conveyer, a PLC controller and a meter. The ultrasonic energy converter is arranged in the processor, the release of residual acetylene gas in the carbide slag and the evaporation of water are accelerated by generating ultrasonic energy, the released acetylene gas is condensed and recovered by the cooler, and the PLC dynamically adjusts the ultrasonic power and starts auxiliary heating according to the feeding amount fed back by the meter and the temperature parameter in the processor, so that the proper treatment temperature is maintained. The invention realizes the automatic control of carbide slag treatment, obviously improves the treatment efficiency, greatly reduces the energy consumption, effectively ensures the production safety, and simultaneously realizes the recycling of acetylene gas.

Inventors

  • LI YAWEN
  • ZHOU JIANHUA
  • FENG YONGJUN
  • LI TIANQI
  • LIU YING
  • CHEN DAYUAN

Assignees

  • 金川集团股份有限公司
  • 金川集团化工新材料有限责任公司

Dates

Publication Date
20260508
Application Date
20251222

Claims (13)

  1. 1. The utility model provides a carbide slag processing apparatus based on ultrasonic wave technique, includes carbide slag storehouse, treater, ultrasonic transducer, supplementary electrical heating unit, agitator, cooler, acetylene gas holder, catch basin, screw conveyer, PLC controller and counter, its characterized in that: The discharge port of the carbide slag bin is connected to the feed port of the processor through the meter; The ultrasonic transducer is arranged on the inner wall of the processing cavity of the processor; The stirrer and the auxiliary electric heating unit are arranged in the processing cavity of the processor; the top outlet of the processor is connected to the air inlet of the cooler through a vapor pipe, and the bottom outlet of the processor is connected to the screw conveyor through a dry slag pipe; the outlet of the cooler is connected to the acetylene cabinet through an acetylene pipe, and the bottom outlet of the cooler is connected to the water collecting tank through a condensate pipe; the PLC controller is electrically connected with the meter, the ultrasonic transducer, the auxiliary electric heating unit and the stirrer.
  2. 2. The ultrasonic technology-based carbide slag treatment device according to claim 1, wherein the inner wall of the treatment cavity of the processor is provided with an anti-corrosion coating.
  3. 3. The ultrasonic technology-based carbide slag treatment device according to claim 1, wherein a safety relief valve is provided at the top of the processor.
  4. 4. The ultrasonic technology-based carbide slag treatment device according to claim 1, wherein a temperature sensor and a pressure sensor are further arranged in the processor, and the temperature sensor and the pressure sensor are electrically connected with the PLC controller.
  5. 5. The device according to claim 1, wherein the number of ultrasonic transducers is 10 to 20 and the ultrasonic transducers are distributed in an array on the inner wall of the processing chamber of the processor.
  6. 6. The device according to claim 1, wherein the stirrer is an anchor stirrer, the blade surface of which is covered with a wear-resistant coating.
  7. 7. The device for treating carbide slag based on the ultrasonic technology according to claim 1, wherein the treatment cavity of the processor is of a double-layer heat-insulating structure.
  8. 8. A method of carbide slag treatment using the apparatus of any one of claims 1 to 7, comprising the steps of: S1, adding carbide slag into a processor through a meter, and monitoring the feeding amount in real time; S2, starting an ultrasonic transducer, and treating carbide slag at the frequency of 20 kHz-40 kHz and the power of 8 kW-10 kW, wherein the ultrasonic power is regulated according to the feeding amount, namely, when the single treatment amount is more than or equal to 500kg, the ultrasonic power is regulated to 10 kW-15 kW, when the single treatment amount is less than 300kg, the ultrasonic power is regulated to 5 kW-8 kW, the temperature in a cavity of a processor is maintained within the range of 50-130 ℃, and a stirrer is synchronously started in the treatment process to stir the carbide slag in the processor; S3, condensing acetylene gas released from carbide slag through a cooler, and storing the condensed acetylene gas in an acetylene gas cabinet; s4, discharging the processed dry slag through a screw conveyor.
  9. 9. The method for treating carbide slag based on the ultrasonic technology according to claim 8, wherein in the step S2, when the temperature is lower than 15 ℃, the auxiliary electric heating unit is started, and the heating power is 2kw to 5kw.
  10. 10. The method for treating carbide slag based on ultrasonic technology according to claim 8, wherein the rotation speed of the blades of the stirrer in the step S2 is 30rpm to 150rpm.
  11. 11. The method for treating carbide slag based on the ultrasonic technology according to claim 8, wherein in the step S2, the pressure in the processor is monitored in real time by a pressure sensor, and when the pressure exceeds 0.2MPa, a safety relief valve is started to relieve pressure.
  12. 12. The method according to claim 8, wherein the circulating water temperature of the cooler in step S3 is 5 ℃ to 25 ℃.
  13. 13. The method according to claim 8, wherein in step S4, when the moisture content of the carbide slag is less than 3%, the ultrasonic treatment is stopped and the screw conveyor is started to discharge the dry slag.

Description

Carbide slag treatment device and method based on ultrasonic technology Technical Field The invention belongs to the technical field of calcium carbide method polyvinyl chloride production, and particularly relates to a device and a method for processing calcium carbide slag based on an ultrasonic technology, which are used for releasing residual acetylene gas in the calcium carbide slag and evaporating water. Background In the production process of polyvinyl chloride (PVC) by a calcium carbide method, a large amount of carbide slag is generated, and the carbide slag contains unreacted complete acetylene gas, moisture and unreacted raw calcium carbide. Because acetylene gas is inflammable and explosive, and the water content of carbide slag is high, potential safety hazards exist in the conveying or subsequent processing process, such as acetylene flash explosion risk, and resource waste and environmental pollution are caused. Therefore, how to treat carbide slag efficiently and safely, recover acetylene gas and reduce water content becomes a technical problem to be solved in the art. In the prior art, various methods have been attempted to solve the problems of acetylene recovery and treatment in carbide slag. For example, CN109609188B recovers acetylene under vacuum through a degassing tower and performs filter pressing, drying and classification, but the method relies on high temperature and vacuum operation, has higher energy consumption and limited treatment efficiency, CN207958262U further hydrolyzes unreacted calcium carbide by adopting a screw conveyor and a slurry acetylene generator, has a complex structure and long treatment flow, has potential safety hazard, CN113171632B removes impurity gases such as acetylene by utilizing a micro-nano bubble technology, has complex device and high cost, can not thoroughly solve acetylene release, and CN208327922U recovers acetylene by adopting a heating coil and double low-pressure removal and is provided with a slurry return pipe to control flow, but the heating process has high energy consumption and high maintenance cost. In terms of safety risk, in the prior art, such as vacuum degassing of CN109609188B and spiral conveying hydrolysis of CN207958262U, the treatment is mostly semi-open or stepwise, acetylene gas is easy to leak, and flash explosion hidden danger exists. The prior art has the common problems of high energy consumption, low efficiency, large pollution, complex device or incomplete elimination of potential safety hazards and the like. Therefore, the development of the acetylene sludge treatment technology capable of efficiently and safely recycling acetylene gas and removing water is an urgent problem to be solved in the field of PVC production by a calcium carbide method. Disclosure of Invention Aiming at the problems existing in the prior art, the invention provides a device comprising a carbide slag bin, a processor, an ultrasonic transducer, an auxiliary electric heating unit, a stirrer, a cooler, an acetylene gas holder, a water collecting tank, a screw conveyer, a PLC controller and a meter, which is characterized in that: The discharge port of the carbide slag bin is connected to the feed port of the processor through the meter; the ultrasonic energy converter is arranged on the inner wall of the processing cavity of the processor, the stirrer and the auxiliary electric heating unit are arranged in the processing cavity of the processor, the top outlet of the processor is connected to the air inlet of the cooler through a vapor pipe, the bottom outlet of the processor is connected to the screw conveyor through a dry slag pipe, the outlet of the cooler is connected to the acetylene gas tank through an acetylene pipe, the bottom outlet of the cooler is connected to the water collecting tank through a condensate pipe, and the PLC is electrically connected with the meter, the ultrasonic energy converter, the auxiliary electric heating unit and the stirrer. Further, the inner wall of the processing cavity of the processor is provided with an anti-corrosion coating. Further, a safety relief valve is arranged at the top of the processor. Further, a temperature sensor and a pressure sensor are further arranged in the processor, and the temperature sensor and the pressure sensor are electrically connected with the PLC. Further, the number of the ultrasonic transducers is 10 to 20, and the ultrasonic transducers are distributed in an array on the inner wall of the processing cavity of the processor. Further, the stirrer is an anchor stirrer, and the surface of a blade of the anchor stirrer is covered with a wear-resistant coating. Further, the processing cavity of the processor is of a double-layer heat-insulating structure. The invention also provides a carbide slag treatment method adopting the device, which is characterized by comprising the following steps: S1, adding carbide slag into a processor through a meter, and monitoring the feeding a