A device and method for recovering acetone from acetylene cylinder

Abstract

The present invention belongs to the technical field of chemical treatment, and specifically relates to a device and method for recovering acetone in acetylene cylinders. The device for recovering acetone in acetylene cylinders provided by the present invention comprises: a filler heating container, which is used to load water and calcium silicate filler containing acetone; a water storage container, which stores water inside and is connected to the filler heating container through a water level regulating pipeline to control the water level in the filler heating container; a solar heating plate, which is connected to the filler heating container, absorbs solar energy and heats the materials in the filler heating container to volatilize the acetone to form acetone vapor; an acetone container, which is used to collect and store the recovered acetone liquid; a condenser, which condenses the acetone vapor in the filler heating container and guides it to the acetone container. The method for recovering acetone in acetylene cylinders provided by the present invention utilizes the device, which can realize the rapid and efficient recovery of acetone resources in scrapped acetylene cylinders with simple operation, and has excellent economic efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical processing, and in particular relates to a device and a method for recovering acetone in an acetylene cylinder. Background Art

[0002] In the storage and transportation of acetylene gas, in order to ensure safety and increase gas storage capacity, acetylene cylinders are uniquely designed to be filled with calcium silicate powder and acetone liquid to dissolve acetylene gas. However, due to the presence of calcium silicate filler and acetone in this design, there are significant safety hazards and resource recovery problems when acetylene cylinders are scrapped.

[0003] At present, the traditional way of handling scrapped acetylene cylinders usually involves opening the bottle and dumping the filling, which causes the residual acetone inside to evaporate directly into the atmosphere, causing not only environmental pollution but also waste of acetone resources. In addition, due to the low current market price of acetone and the lack of corresponding recycling qualification processing mechanisms in various places, the waste of acetone resources and its impact on the environment have not received enough attention.

[0004] The existing acetone recovery device, as described in the patent publication CN2239421Y, recovers acetone vapor by heating the box body and condensing under negative pressure. However, after testing, the device showed low efficiency in actual operation and failed to achieve the ideal recovery effect. After in-depth experiments and analysis, since acetone is highly dispersed in the calcium silicate filler with poor thermal conductivity, and the porosity of the calcium silicate filler is as high as about 94%, it is difficult to quickly and efficiently vaporize acetone by external heating. At the same time, the heat consumption during the acetone heating and phase change process further reduces the recovery efficiency, making the traditional bottle body heating distillation method not advantageous in terms of time, energy consumption, recovery efficiency and economic benefits.

[0005] In the market economy environment, the recovery of acetone from scrapped acetylene cylinders requires not only simple, efficient and rapid recovery in technology, but also good economic efficiency of the corresponding technical solution, otherwise it will be difficult to be truly promoted and applied. Therefore, the development of a simple, efficient, fast and economical recovery solution is of great practical significance for the recovery of acetone resources in scrapped acetylene cylinders, environmental protection, and the promotion of the green transformation of the scrapped acetylene cylinder disposal industry. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a device and method for recovering acetone in acetylene cylinders. The purpose of the present invention is to realize the recovery of acetone resources in scrapped acetylene cylinders in a simple, efficient, fast and economical manner.

[0007] A first aspect of the present invention is to provide a device for recovering acetone in an acetylene cylinder, the device comprising:

[0008] A filler heating container having a closable receiving chamber for loading water and a calcium silicate filler containing acetone;

[0009] A water storage container, which stores water, is connected to the filler heating container through a water level regulating pipeline, and the water level regulating pipeline is provided with an infusion pump and a control valve to control the water level in the filler heating container;

[0010] A solar heating panel is connected to the packing heating container, absorbs solar energy and heats the material in the packing heating container, so that the acetone is volatilized to form acetone vapor;

[0011] An acetone container, which is used to collect and store the recovered acetone liquid;

[0012] The condenser is connected between the packing heating container and the acetone container to condense the acetone vapor in the packing heating container and guide it to the acetone container.

[0013] Furthermore, in the above-mentioned device for recovering acetone in an acetylene cylinder, the feed port of the condenser is connected to the top of the packing heating container, and the discharge port of the condenser is connected to the top of the acetone container.

[0014] Furthermore, the above-mentioned device for recovering acetone in acetylene cylinders also includes a control device; the control device has a water level detection module, the water level detection module obtains actual water level data in the filler heating container from a water level sensor installed in the filler heating container, and controls the infusion pump and control valve on the water level regulating pipeline according to the size relationship between the actual water level data and the preset water level data.

[0015] Furthermore, in the above-mentioned device for recovering acetone in acetylene cylinders, the control device also has a temperature detection module, which obtains actual temperature data in the packing heating container from a temperature sensor installed in the packing heating container, and determines the recovery progress of acetone based on the actual temperature data.

[0016] Furthermore, in the above-mentioned device for recovering acetone in acetylene cylinders, the control device also has a pressure detection module, which obtains actual pressure data in the filler heating container from a pressure sensor installed in the filler heating container, and when the actual pressure data exceeds a preset safety pressure, an alarm is issued and the solar heating panel is turned off.

[0017] The second aspect of the present invention is to provide a method for recovering acetone in an acetylene cylinder, which requires the use of the above-mentioned device for recovering acetone in an acetylene cylinder and comprises the following steps:

[0018] Step S1: taking out the filler from the acetylene cylinder, bagging it and placing it in a filler heating container;

[0019] Step S2: Turn on the control device to determine whether the water level in the filling heating container is within a preset range. If the actual water level data is lower than the preset water level data, control the infusion pump and the control valve on the water level regulating pipeline to inject water from the water storage container into the filling heating container until the water level in the filling heating container meets the preset range.

[0020] Step S3: Turn on the solar heating panel to heat the inside of the filling heating container, and the control device monitors the actual temperature data in the filling heating container in real time;

[0021] Step S4: When the actual temperature data monitored in the filler heating container exceeds the preset heating cut-off temperature, the solar heating panel is turned off, and then the water level regulating pipeline is opened to re-introduce the water in the filler heating container into the water storage container, and then the old filler bag is taken out from the filler heating container to complete a round of recycling operation.

[0022] Furthermore, in the above method for recovering acetone in an acetylene cylinder, the heating cutoff temperature of step S4 is in the range of 58.5°C to 62.0°C.

[0023] Furthermore, in the above method for recovering acetone in an acetylene cylinder, the heating cutoff temperature of step S4 is in the range of 59.5°C to 60.5°C.

[0024] Furthermore, in the above method for recovering acetone in acetylene cylinders, the control device also has a pressure detection module, which obtains actual pressure data in the filler heating container from a pressure sensor installed in the filler heating container; during step S3 to step S4, the control device monitors the actual pressure data in real time, and when it is detected that the actual pressure data exceeds a preset safety pressure, an alarm is issued to shut down the solar heating panel; the preset safety pressure is in the range of 1.15atm~1.40atm.

[0025] Furthermore, in the above method for recovering acetone in an acetylene cylinder, the preset safety pressure is in the range of 1.20 atm to 1.30 atm.

[0026] Beneficial Effects

[0027] Compared with the prior art, the device and method for recovering acetone from acetylene cylinders provided by the present invention can realize rapid and efficient recovery of acetone resources from scrapped acetylene cylinders with simple operation, and has excellent economic efficiency. The initial cost and operating cost are reduced by designing a simple structure and using solar energy as a heat source; the evaporation and recovery process of acetone is optimized by accurately controlling the water level, temperature and pressure, and the efficiency and speed of acetone recovery are improved; the convenience and safety of the recovery process are guaranteed by real-time monitoring and automatic adjustment of the control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a device for recovering acetone from acetylene cylinders.

[0029] In the figure, 1. filler heating container; 2. water storage container; 3. control device; 4. solar heating panel; 5. condenser; 6. acetone container. DETAILED DESCRIPTION

[0030] The present invention is further illustrated by specific examples below. These examples are exemplary and are intended to illustrate the problem and explain the present invention, but are not intended to be limiting.

[0031] The present invention provides a device for recovering acetone in an acetylene cylinder, such as Figure 1 As shown, it mainly includes a filler heating container 1, a water storage container 2, a solar heating panel 4, a condenser 5 and an acetone container 6.

[0032] The filler heating container 1 has a closable containing chamber for loading water and calcium silicate filler containing acetone. The filler heating container 1 provides a safe environment through the closed containing chamber, so that acetone can evaporate from the filler during the heating process without leaking into the external environment.

[0033] The water storage container 2 stores water and is connected to the filler heating container 1 through a water level regulating pipeline. The water level regulating pipeline is provided with an infusion pump and a control valve to control the water level in the filler heating container 1, so that the water level in the filler heating container 1 can be freely adjusted at different stages according to the design of the extraction method.

[0034] The solar heating panel 4 is connected to the filler heating container 1, absorbs solar energy, converts the solar energy into thermal energy, heats the material in the filler heating container 1, and volatilizes the acetone to form acetone vapor.

[0035] The acetone container 6 provides a sealed container for collecting and storing the recovered acetone liquid for subsequent discharge and use.

[0036] The condenser 5 is connected between the packing heating container 1 and the acetone container 6, and condenses the acetone vapor in the packing heating container 1 and guides it to the acetone container 6. In the condenser 5, the acetone vapor is pre-cooled to form a liquid, and finally guided to the acetone container 6 through the discharge port. Preferably, the feed port of the condenser 5 is connected to the top of the packing heating container 1, and the discharge port of the condenser 5 is connected to the top of the acetone container 6.

[0037] In the above-mentioned device for recovering acetone from acetylene cylinders, the main components together constitute an efficient and environmentally friendly recovery system. The entire device utilizes the heat provided by the solar heating panel 4 to heat the water and calcium silicate filler in the filler heating container 1, so that acetone evaporates from the filler. The volatilized acetone vapor is condensed into liquid through the condenser 5 and collected in the acetone container 6.

[0038] The device for recovering acetone in acetylene cylinders also has a control device 3. The control device 3 automatically adjusts the operation of each component by monitoring parameters such as water level, temperature, pressure, etc., to ensure the efficiency and safety of the recovery process.

[0039] Specifically, the control device 3 has a water level detection module, which obtains actual water level data in the filling heating container 1 from a water level sensor installed in the filling heating container 1, and controls the infusion pump and control valve on the water level regulating pipeline according to the size relationship between the actual water level data and the preset water level data.

[0040] The control device 3 also has a temperature detection module, which obtains the actual temperature data in the filler heating container 1 from the temperature sensor installed in the filler heating container 1, and determines the recovery progress of acetone according to the actual temperature data. Specifically, as the heating proceeds, the temperature in the filler heating container 1 changes in different stages. In the initial stage of heating, the temperature is low and does not reach the boiling point of acetone (about 56°C). The heat consumption at this time is mainly due to the increase in the temperature of water and acetone in the filler heating container 1. As the heating proceeds, when the temperature approaches the boiling point of acetone, acetone begins to evaporate from the calcium silicate filler to form steam. At this time, the heating rate tends to be flat in stages because the acetone evaporates and absorbs part of the heat. As the heating proceeds, acetone continues to evaporate, and the acetone content in the filler heating container 1 decreases rapidly. When the acetone is basically evaporated, the temperature in the filler heating container 1 will be mainly controlled by the specific heat of water. If the heating is continued, the temperature will enter a new rising stage again. At this time, it can be judged that the extraction of acetone is basically completed. Therefore, in actual operation, the control device 3 can automatically determine the evaporation of acetone based on the data collected by the temperature sensor, and stop heating at an appropriate time to achieve efficient and complete acetone recovery.

[0041] The control device 3 also has a pressure detection module, which obtains the actual pressure data in the filler heating container 1 from the pressure sensor installed in the filler heating container 1. When the actual pressure data exceeds the preset safety pressure, an alarm is issued and the solar heating panel 4 is turned off. By real-time monitoring of the pressure data in the filler heating container 1, it can be ensured that the system operates within a safe pressure range. If the pressure in the filler heating container 1 is too high, it is judged that there may be safety risks such as overheating, acetone vapor accumulation, and pipeline blockage. At this time, an alarm is issued and the solar heating panel 4 is automatically turned off, thereby stopping the heating process to prevent the pressure from continuing to rise and causing a safety accident.

[0042] Through the above-mentioned device, acetone in scrapped acetylene cylinders can be recovered in a simple, efficient, fast and economical manner, while reducing environmental pollution and resource waste. The specific recovery method includes the following steps S1 to S4.

[0043] Step S1: Take out the filler from the acetylene cylinder, put it into a bag and place it in the filler heating container 1.

[0044] Step S2: Turn on the control device 3 to determine whether the water level in the filling heating container 1 is within the preset range. If the actual water level data is lower than the preset water level data, control the infusion pump and the control valve on the water level regulating pipeline to inject water from the water storage container 2 into the filling heating container 1 until the water level in the filling heating container 1 meets the preset range.

[0045] Step S3: Turn on the solar heating panel 4 to heat the inside of the filling heating container 1 , and the control device 3 monitors the actual temperature data in the filling heating container 1 in real time.

[0046] Step S4: When the actual temperature data in the monitoring filler heating container 1 exceeds the preset heating cut-off temperature, the solar heating panel 4 is turned off, and then the water level regulating pipeline is opened to re-introduce the water in the filler heating container 1 into the water storage container 2, and then the old filler bag is taken out from the filler heating container 1 to complete a round of recycling operation. After testing, the preferred heating cut-off temperature is in the range of 58.5℃~62.0℃. Further, the heating cut-off temperature of step S4 is in the range of 59.5℃~60.5℃.

[0047] In addition, during the process from step S3 to step S4, the control device 3 monitors the actual pressure data in real time, and when it is detected that the actual pressure data exceeds the preset safety pressure, an alarm is issued to shut down the solar heating panel 4. Preferably, the preset safety pressure is in the range of 1.15atm~1.40atm, and more preferably in the range of 1.20atm~1.30atm.

[0048] During the implementation of the above recovery method, the control device 3 automatically adjusts the water level and starts and stops the solar heating panel 4, which reduces manual operation, automates the entire process, and simplifies the operation process; the solar heating panel 4 is used to heat the material in the filler heating container 1. Solar energy is a clean and renewable energy source. Using solar energy for heating can significantly reduce energy costs and improve energy utilization efficiency; by real-time monitoring of temperature and setting of heating cut-off temperature, it can ensure that acetone evaporates quickly, while avoiding overheating and energy waste, thereby improving the efficiency of acetone recovery; by automatically controlling the water level and starting and stopping heating, the system demand is quickly responded to, and by solar heating and real-time temperature monitoring, the heating and volatilization of acetone are completed in a short time, thereby improving the recovery speed; the entire device uses simple components such as the filler heating container 1 and the acetone container 6, and uses solar energy as a heat source, thereby reducing the consumption of traditional energy, reducing the operating cost, and making the entire recovery process more economical.

[0049] The above embodiments are exemplary, and their purpose is to illustrate the technical concept and features of the present invention so that people familiar with the technology in this field can understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for recovering acetone from an acetylene cylinder, characterized in that: The following device is used: A filler heating container (1) having a closable containing chamber for containing water and a calcium silicate filler containing acetone; A water storage container (2) having water stored therein, connected to the filler heating container (1) via a water level regulating pipeline, wherein the water level regulating pipeline is provided with an infusion pump and a control valve for controlling the water level in the filler heating container (1); A solar heating panel (4) is connected to the filler heating container (1), absorbs solar energy and heats the material in the filler heating container (1), so that the acetone is volatilized to form acetone vapor; An acetone container (6) for collecting and storing the recovered acetone liquid; A condenser (5) connected between the filler heating container (1) and the acetone container (6) for condensing acetone vapor in the filler heating container (1) and directing the acetone vapor into the acetone container (6); A control device (3), comprising a water level detection module and a temperature detection module; The following steps are involved: Step S1: taking out the filler from the acetylene cylinder, bagging it and placing it in a filler heating container (1); Step S2: turning on the control device (3) to determine whether the water level in the filling heating container (1) is within a preset range; if the actual water level data is lower than the preset water level data, controlling the infusion pump and the control valve on the water level regulating pipeline to inject water from the water storage container (2) into the filling heating container (1) until the water level in the filling heating container (1) meets the preset range; Step S3: turning on the solar heating panel (4) to heat the interior of the filling heating container (1), and the control device (3) monitoring the actual temperature data in the filling heating container (1) in real time; Step S4: When the actual temperature data in the monitoring filler heating container (1) exceeds the preset heating cut-off temperature, the solar heating panel (4) is turned off, and then the water level regulating pipeline is opened to re-introduce the water in the filler heating container (1) into the water storage container (2), and then the old filler bag is taken out from the filler heating container (1), completing a round of recycling operation.

2. The method for recovering acetone in an acetylene cylinder according to claim 1, characterized in that: The feed port of the condenser (5) is connected to the top of the filler heating container (1), and the discharge port of the condenser (5) is connected to the top of the acetone container (6).

3. The method for recovering acetone in an acetylene cylinder according to claim 1 or 2, characterized in that: The water level detection module obtains actual water level data in the filling heating container (1) from a water level sensor installed in the filling heating container (1), and controls the infusion pump and the control valve on the water level regulating pipeline according to the magnitude relationship between the actual water level data and the preset water level data.

4. The method for recovering acetone in an acetylene cylinder according to claim 3, characterized in that: The temperature detection module obtains actual temperature data in the filler heating container (1) from a temperature sensor installed in the filler heating container (1), and determines the recovery progress of acetone based on the actual temperature data.

5. The method for recovering acetone in an acetylene cylinder according to claim 4, characterized in that: The control device (3) also has a pressure detection module, which obtains actual pressure data in the filler heating container (1) from a pressure sensor installed in the filler heating container (1), and issues an alarm and shuts down the solar heating panel (4) when the actual pressure data exceeds a preset safety pressure.

6. The method for recovering acetone in an acetylene cylinder according to claim 1, characterized in that: The heating cut-off temperature in step S4 is in the range of 58.5°C to 62.0°C.

7. The method for recovering acetone in an acetylene cylinder according to claim 1, characterized in that: The heating cut-off temperature in step S4 is in the range of 59.5°C to 60.5°C.

8. The method for recovering acetone in an acetylene cylinder according to claim 1, characterized in that: The control device (3) further comprises a pressure detection module, which obtains actual pressure data in the filler heating container (1) from a pressure sensor installed in the filler heating container (1); during steps S3 to S4, the control device (3) monitors the actual pressure data in real time, and when it is detected that the actual pressure data exceeds a preset safety pressure, an alarm is issued to shut down the solar heating panel (4); the preset safety pressure is in the range of 1.15 atm to 1.40 atm.

9. The method for recovering acetone in an acetylene cylinder according to claim 8, characterized in that: The preset safety pressure is in the range of 1.20atm to 1.30atm.

Images