Drying device for detecting gas cylinder by using waste nitrogen of air separation device

Abstract

The utility model belongs to the technical field of gas filling, and particularly relates to a drying device for detecting a gas cylinder by utilizing waste nitrogen of an air separation device, which comprises the air separation device, a heater and a drying box, a waste nitrogen outlet of the air separation device is connected with the drying box through a pipeline via the heater, an exhaust pipe is arranged at the top of the drying box, and an exhaust fan is arranged on the exhaust pipe. Bottle drying stations are arranged in the drying box, one bottle drying station is correspondingly provided with one nitrogen pipe, and each nitrogen pipe is provided with an angle valve. The temperature controller is respectively connected with the heater and a thermometer arranged at an outlet of the heater; the controller is respectively connected with the alarm, the induced draft fan and the exhaust fan, the alarm is arranged in the drying workshop, and the induced draft fan is arranged on the wall of the drying workshop. The device has the beneficial effects that waste nitrogen discharged by the air separation device is fully utilized, and moisture in the inspection gas cylinder is heated, purged and dried by virtue of the heater and the drying box, so that the waste nitrogen is recycled, and the labor intensity of personnel is reduced; and high electric energy consumption in the gas replacement process is saved.

Description

Technical Field

[0001] This utility model belongs to the field of gas filling technology, and in particular relates to a drying device for testing gas cylinders using waste nitrogen from an air separation unit. Background Technology

[0002] In the current gas filling process, gas cylinder inspection agencies have high requirements for the moisture content inside the cylinders after inspection. If the moisture content is too high, it will directly affect the purity of the gas. Therefore, the inspected cylinders need to be dried. Generally, inspection agencies purge with steam, then fill the cylinder with dry gas from a nitrogen cylinder, heat it, release and replace the gas, and then vacuum it or use air for treatment. The operation process is relatively cumbersome.

[0003] An air separation unit is an industrial equipment used to separate the various gas components in air and produce gases such as oxygen, nitrogen, and argon. The most common air separation method is cryogenic distillation. Cryogenic separation uses a deep-freezing compression cycle to liquefy air, and then uses cryogenic distillation to gradually separate inert gases such as oxygen, nitrogen, and argon from the liquid air based on their different boiling points. This method is widely used in traditional metallurgy, new coal chemical industry, large-scale nitrogen fertilizer production, and specialized gas supply. Other air separation methods, such as membrane separation, pressure swing adsorption (PSA), and vacuum pressure swing adsorption (VPSA), are mainly used to separate single components from air.

[0004] Currently, air separation units release some nitrogen back into the atmosphere during liquid production, resulting in energy waste. Utility Model Content

[0005] The purpose of this invention is to provide a drying device for test gas cylinders using waste nitrogen from an air separation unit. This device overcomes the shortcomings of existing technologies, makes full use of the waste nitrogen emitted from the air separation unit, and uses a heater and drying box to heat, purge, and dry the moisture in the test gas cylinders, thereby achieving the reuse of waste nitrogen, saving production costs, and reducing the labor intensity of personnel.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A drying device for testing gas cylinders using waste nitrogen from an air separation unit includes an air separation unit, a heater, and a drying chamber. The waste nitrogen outlet of the air separation unit is connected to the drying chamber via a pipeline through the heater. The top of the drying chamber is equipped with an exhaust pipe, and an exhaust fan is installed on the exhaust pipe. The drying chamber has a cylinder drying station, with one nitrogen pipe corresponding to each cylinder drying station, and each nitrogen pipe is equipped with an angle valve. A temperature controller is connected to the heater and a temperature gauge located at the heater outlet. A controller is connected to an alarm, an induced draft fan, and an exhaust fan. The alarm is located in the drying chamber, and the induced draft fan is installed on the wall of the drying chamber.

[0008] Furthermore, the air separation unit is model KDONAr-3000 / 550 / 106.

[0009] Furthermore, the model of the exhaust fan is 2.5A-4-380V.

[0010] Furthermore, the model of the induced draft fan is a 4-72 centrifugal fan.

[0011] Furthermore, the heater is model J-50KW.

[0012] Furthermore, the model of the alarm is VT310 combustible gas alarm.

[0013] Furthermore, a pressure gauge is installed on the pipeline, with a regulating valve before and after the pressure gauge.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1) The waste nitrogen emitted from the air separation unit is fully utilized. The moisture in the test gas cylinder is heated, purged and dried by heaters and drying boxes, so as to realize the reuse of waste nitrogen and reduce the labor intensity of personnel.

[0016] 2) It saves on the high energy consumption of the gas replacement process and reduces production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0018] In the diagram: 1-Air separation unit, 2-Heater, 3-Drying chamber, 4-Pipeline, 5-Exhaust pipe, 6-Exhaust fan, 7-Nitrogen pipe, 8-Angle valve, 9-Thermostat, 10-Thermometer, 11-Alarm, 12-Exhaust fan, 13-Pressure gauge, 14-Regulating valve, 15-Controller. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0021] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but only to illustrate selected embodiments of the invention.

[0022] See Figure 1 This is a schematic diagram of an embodiment of the present invention: a drying device for testing gas cylinders using waste nitrogen from an air separation unit. It includes an air separation unit 1, a heater 2, and a drying chamber 3. The waste nitrogen outlet of the air separation unit 1 is connected to the drying chamber 3 via a pipe 4 through the heater 2. An exhaust pipe 5 is installed on the top of the drying chamber 3, and an exhaust fan 12 is installed on the exhaust pipe 5. An induced draft fan 6 is installed on the wall of the drying chamber. A bottle drying station is provided inside the drying chamber 3, with one nitrogen pipe 7 corresponding to each drying station. Each nitrogen pipe 7 is equipped with an angle valve 8. A temperature controller 9 is connected to the heater 2 and a temperature gauge 10 located at the outlet of the heater 2. A controller 15 is connected to an alarm 11, the induced draft fan 6, and the exhaust fan 12. The alarm 11 is located inside the drying chamber and monitors the nitrogen concentration.

[0023] In this embodiment, the air separation unit 1 is model KDONAr-3000 / 550 / 106. The exhaust fan 12 is model 2.5A-4-380V. The induced draft fan 6 is model 4-72 centrifugal fan. The heater 2 is model J-50KW. The alarm 11 is model VT310 combustible gas alarm. A pressure gauge 13 is installed on the pipeline 4, and there is a regulating valve 14 before and after the pressure gauge 13.

[0024] The operation method and steps of this utility model embodiment are as follows: 1) Open the regulating valve 14 on the pipeline 4 to allow the waste nitrogen gas discharged from the air separation unit 1 to enter the heater 2 and control the heating temperature to 80-100℃; 2) After the nitrogen gas is heated, it enters the drying station of the drying box 3 through the pipeline and purges and dries the inside of the gas cylinder with hot gas for 2 hours; 3) After purging and drying, the nitrogen gas is discharged to the outside of the workshop through the exhaust fan 6. An alarm 11 is installed in the workshop. Once the nitrogen gas leaks from the heater 2 and the drying box 3, the exhaust fan 12 will be automatically turned on to discharge all the nitrogen gas into the atmosphere outside the workshop, so as to avoid health risks to the workers in the workshop.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drying device for testing gas cylinders using waste nitrogen from an air separation unit, characterized in that, The system includes an air separation unit, a heater, and a drying chamber. The waste nitrogen outlet of the air separation unit is connected to the drying chamber via a pipeline through the heater. The top of the drying chamber is equipped with an exhaust pipe, and an exhaust fan is installed on the exhaust pipe. The drying chamber has bottle drying stations, with one nitrogen pipe corresponding to each bottle drying station. Each nitrogen pipe is equipped with an angle valve. The temperature controller is connected to the heater and a temperature gauge located at the heater outlet. The controller is connected to an alarm, an induced draft fan, and an exhaust fan. The alarm is located in the drying workshop, and the induced draft fan is installed on the wall of the drying workshop.

2. The drying device for testing gas cylinders using waste nitrogen from an air separation unit according to claim 1, characterized in that, The air separation unit is model KDONAr-3000 / 550 / 106.

3. The drying device for testing gas cylinders using waste nitrogen from an air separation unit according to claim 1, characterized in that, The exhaust fan is model 2.5A-4-380V.

4. A drying device for testing gas cylinders using waste nitrogen from an air separation unit according to claim 1, characterized in that, The induced draft fan is a 4-72 centrifugal fan.

5. A drying device for testing gas cylinders using waste nitrogen from an air separation unit according to claim 1, characterized in that, The heater is model J-50KW.

6. A drying device for testing gas cylinders using waste nitrogen from an air separation unit according to claim 1, characterized in that, The alarm is a VT310 combustible gas alarm.

7. A drying device for testing gas cylinders using waste nitrogen from an air separation unit according to claim 1, characterized in that, The pipeline is equipped with a pressure gauge, and there is a regulating valve before and after the pressure gauge.

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