Oxygen-deficient filling device

Abstract

The utility model relates to a filling oxygen-deficient device which comprises a mixer and a buffer tank connected with the mixer through a connecting pipe, the mixer is respectively connected with a first input pipe and a second input pipe, the buffer tank is connected with an output pipe, the first input pipe is used for inputting nitrogen into the mixer, and the second input pipe is used for inputting nitrogen into the mixer. The second input pipe is used for inputting oxygen or air into the mixer; the filling oxygen-deficient device further comprises a first oxygen content meter used for monitoring the concentration of oxygen in the mixer, a second oxygen content meter used for monitoring the concentration of oxygen in the buffer tank and a control system, and the control system is in signal connection with the first oxygen content meter and the second oxygen content meter. The oxygen concentration content in the mixed gas generated by the oxygen-deficient filling device can be accurately controlled, the mixed gas meeting the requirements of conveying and filling processes is obtained, and the explosion risk and the risk of failure of a polymerization inhibitor caused by over-high or over-low oxygen concentration in the mixed gas in contact with materials are avoided.

Description

Technical Field

[0001] The utility model specifically relates to a filling oxygen-depleted device. Background Art

[0002] When some chemical products come into contact with pure nitrogen or oxygen in the air, the polymerization inhibitor in the product will fail and a polymerization reaction will occur, and an explosive mixed gas will be formed with the vapor of Class A and B chemicals with low flash points under saturated air. In the process of unloading this kind of product tank, nitrogen and air pipes with a good coarse-fine ratio are generally used to pressurize the material. However, this unloading method still has the following problems: First, the oxygen content after the nitrogen and air are mixed during the unloading process cannot be accurately controlled, and there is a risk of excessive oxygen concentration; second, there are abnormalities in the nitrogen or air pipe, such as blockage, valve damage, and imbalance in the mixing ratio, which poses a hidden risk, especially when the nitrogen pipeline fails, it is very easy to form a violent mixed gas. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide an oxygen-depleted filling device capable of obtaining an oxygen-depleted mixed gas that meets the requirements of the conveying and filling processes, thereby making the filling operation safer or avoiding the failure of the inhibitor.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A filling oxygen-depleted device, comprising a mixer and a buffer tank connected to the mixer through a connecting pipe, the mixer is respectively connected with a first input pipe and a second input pipe, the buffer tank is connected with an output pipe, the first input pipe is used to input nitrogen into the mixer, and the second input pipe is used to input oxygen or air into the mixer;

[0006] The oxygen-depleted filling device also includes a first oxygen meter for monitoring the oxygen concentration in the mixer, a second oxygen meter for monitoring the oxygen concentration in the buffer tank, and a control system, wherein the control system is respectively connected to signals of the first oxygen meter and the second oxygen meter.

[0007] In some embodiments, a first electric valve is disposed on the first input pipe, a second electric valve is disposed on the second input pipe, and a third electric valve is disposed on the output pipe. The first electric valve, the second electric valve, and the third electric valve are electrically connected to the control system, respectively.

[0008] In some specific embodiments, a first flow transmitter is further provided on the first input pipe, a second flow transmitter is further provided on the second input pipe, and a third flow transmitter is further provided on the output pipe. The first flow transmitter, the second flow transmitter, and the third flow transmitter are electrically connected to the control system respectively.

[0009] In some specific embodiments, the control system has an alarm, and the alarm is respectively connected to the first oxygen meter and the second oxygen meter signals.

[0010] In some specific embodiments, the oxygen-depleted filling device further comprises a first discharge pipe connected to the mixer, a fourth electric valve is disposed on the first discharge pipe, and the fourth electric valve is electrically connected to a control system.

[0011] In some specific embodiments, the oxygen-depleted filling device further comprises a second discharge pipe connected to the buffer tank, a fifth electric valve is arranged on the second discharge pipe, the fifth electric valve is electrically connected to a control system, and the second discharge pipe is arranged at the top of the buffer tank.

[0012] In some specific embodiments, the oxygen-depleted filling device further comprises a drain pipe connected to the buffer tank, a drain valve is provided on the drain pipe, and the drain pipe is connected to the bottom of the buffer tank.

[0013] In some specific embodiments, a safety valve is also provided on the buffer tank.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] The oxygen concentration in the mixed gas generated by the filling oxygen-depleted device of the utility model can be accurately controlled to obtain a mixed gas that meets the requirements of the conveying and filling processes, thereby avoiding the risk of explosion and the risk of inhibitor failure caused by excessively high or low oxygen concentration in the mixed gas in contact with the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a filling oxygen-depleted device according to a representative embodiment of the utility model;

[0017] In the figure: 1. mixer; 2. buffer tank; 3. first input pipe; 4. second input pipe; 5. connecting pipe; 6. first discharge pipe; 7. drain pipe; 8. second discharge pipe; 9. output pipe; 10. first flow transmitter; 11. second flow transmitter; 12. control system; 13. third flow transmitter; 14. first oxygen content meter; 15. second oxygen content meter; 16. first electric valve; 17. second electric valve; 18. third electric valve; 19. fourth electric valve; 20. fifth electric valve; 21. drain valve; 22. safety valve. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0019] like Figure 1The oxygen-depleted filling device shown includes a mixer 1, a buffer tank 2 connected to the mixer 1 via a connecting pipe 5, and a control system 12. The volume of the buffer tank 2 is greater than the volume of the mixer 1. The mixer 1 is respectively connected to a first input pipe 3 and a second input pipe 4. The first input pipe 3 is used to input nitrogen into the mixer 1, and the second input pipe 4 is used to input air into the mixer 1. The buffer tank 2 is connected to an output pipe 9.

[0020] The filling oxygen-depleted device also includes a first oxygen meter 14 for monitoring the oxygen concentration in the mixer 1 and a second oxygen meter 15 for monitoring the oxygen concentration in the buffer tank 2. The first oxygen meter 14 and the second oxygen meter 15 are respectively electrically connected to the control system 12. The first oxygen meter 14 feeds back the oxygen concentration of the mixer 1 to the control system 12 in real time, and the second oxygen meter 15 feeds back the oxygen concentration of the buffer tank 2 to the control system 12 in real time.

[0021] The first input pipe 3 is provided with a first electric valve 16 and a first flow transmitter 10, respectively. The second input pipe 4 is provided with a second electric valve 17 and a second flow transmitter 11, respectively. The output pipe 9 is provided with a third electric valve 18 and a third flow transmitter 13, respectively. The first electric valve 16, the second electric valve 17, the third electric valve 18, the first flow transmitter 10, the second flow transmitter 11 and the third flow transmitter 13 are electrically connected to the control system 12, respectively. The first flow transmitter 10 and the second flow transmitter 11 are respectively used to detect the usage of nitrogen and air, and feed back the numerical values ​​to the control system 12, so that the control system 12 controls the opening angles of the first electric valve 16 and the second electric valve 17 to control the entry ratio of nitrogen and air and the output of the mixed gas. The output gas volume of the buffer tank 2 is controlled by the opening angle of the third electric valve 18. The third flow transmitter 13 is used to detect the output volume of the mixed gas in the buffer tank 2 and feed back the numerical value to the control system 12, so that the control system 12 can transmit instructions to the first electric valve 16 and the second electric valve 17 to change the opening amplitude of the first electric valve 16 and the second electric valve 17. The gas production of the mixer 1 produces the required mixed gas according to the usage.

[0022] The filling oxygen-depleted device further includes a first discharge pipe 6 connected to the mixer 1, an emptying pipe 7 connected to the buffer tank 2, and a second discharge pipe 8 connected to the buffer tank 2. The first discharge pipe 6 is provided with a fourth electric valve 19, the second discharge pipe 8 is provided with a fifth electric valve 20, and the emptying pipe 7 is provided with an emptying valve 21. The fourth electric valve 19 and the fifth electric valve 20 are respectively electrically connected to the control system 12. Specifically, the second discharge pipe 8 is provided at the top of the buffer tank 2, and the emptying pipe 7 is provided at the bottom of the buffer tank 2.

[0023] The buffer tank 2 is also provided with a safety valve 22 .

[0024] The control system 12 is provided with an alarm, which is respectively connected to the first oxygen meter 14 and the second oxygen meter 15 by signal. In actual use, the control system 12 pre-sets the first high alarm value of the excessively high oxygen concentration in the mixer 1 and the first low alarm value of the excessively low oxygen concentration, and the second high alarm value of the excessively high oxygen concentration in the buffer tank 2 and the second low alarm value, the concentration value of the second high alarm value is lower than the first high alarm value, and the concentration value of the second low alarm value is lower than the first low alarm value. The first oxygen meter 14 feeds back the monitored oxygen concentration in the mixer 1 to the control system 12. If it is monitored that the oxygen concentration in the mixer 1 exceeds the first high alarm value, the first high alarm of the alarm is triggered, and the first electric valve 16 and the second electric valve 16 are adjusted. The opening angle of the electric valve 17 is adjusted, and at the same time, the fourth electric valve 19 is opened to discharge the mixed gas in the unqualified stage in the mixer 1, and finally the oxygen concentration in the mixer 1 is reduced to the qualified range, while the mixed gas in the buffer tank 2 continues to be transported to the use process; if the oxygen concentration in the mixer 1 is monitored to be lower than the first-level low-high alarm value, the first-level low alarm of the alarm is triggered, and the opening angles of the first electric valve 16 and the second electric valve 17 are adjusted, and at the same time, the fourth electric valve 19 is opened to discharge the mixed gas in the unqualified stage in the mixer 1, and finally the oxygen concentration in the mixer 1 is increased to the qualified range, while the mixed gas in the buffer tank 2 continues to be transported to the use process. If the second oxygen content meter 15 monitors that the oxygen concentration in the buffer tank 2 exceeds the second-level high alarm value or is lower than the second-level low alarm value, the control system 12 controls the third electric valve 18 to close, opens the fifth electric valve 20, and discharges the unqualified gas in the buffer tank 2 to prevent the unqualified gas from entering the use process and causing danger.

[0025] When the filling oxygen-depleted device is used, nitrogen and air are respectively transported to the mixer 1 through the first input pipe 3 and the second input pipe 4 for mixing. The first oxygen content meter 14 detects the mixed gas in the mixer 1. By detecting the oxygen content, the first electric valve 16 and the second electric valve 17 change the nitrogen and air intake ratio in time. The first oxygen content meter 14 detects the qualified mixed gas in the mixer 1 and enters the buffer tank 2 as a reserve gas source. The second oxygen content meter 15 detects the mixed gas in the buffer tank 2. When the detection data does not meet the requirements, the opening angle of the first electric valve 16 and the second electric valve 17 is adjusted in time to control the intake volume and change the oxygen concentration of the mixed gas. The first flow transmitter 10, the second flow transmitter 11 and the third flow transmitter 13 respectively detect the gas consumption during gas production or use to change the amount of mixed gas generated. If unqualified mixed gas is detected in the buffer tank 2 before use, the control system 12 controls the third electric valve 18 to close, and the air intake at the rear end is stopped to prevent danger. At the same time, the fifth electric valve 20 is opened to discharge unqualified gas, and the mixer 1 end adjusts the mixing ratio within the set value range according to the oxygen concentration requirement in the buffer tank 2, and finally keeps the gas in the buffer tank 2 and the rear end in compliance with the set requirements.

[0026] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A filling oxygen-depleted device, Features: The mixer comprises a buffer tank connected to the mixer via a connecting pipe, wherein the mixer is respectively connected with a first input pipe and a second input pipe, and the buffer tank is connected with an output pipe, wherein the first input pipe is used to input nitrogen into the mixer, and the second input pipe is used to input oxygen or air into the mixer; The oxygen-depleted filling device also includes a first oxygen meter for monitoring the oxygen concentration in the mixer, a second oxygen meter for monitoring the oxygen concentration in the buffer tank, and a control system, wherein the control system is respectively connected to signals of the first oxygen meter and the second oxygen meter.

2. The filling oxygen-depleted device according to claim 1, Features: The first input pipe is provided with a first electric valve, the second input pipe is provided with a second electric valve, the output pipe is provided with a third electric valve, and the first electric valve, the second electric valve and the third electric valve are electrically connected to the control system respectively.

3. The filling oxygen-depleted device according to claim 2, Features: The first input pipe is also provided with a first flow transmitter, the second input pipe is also provided with a second flow transmitter, and the output pipe is also provided with a third flow transmitter. The first flow transmitter, the second flow transmitter, and the third flow transmitter are electrically connected to the control system respectively.

4. The filling oxygen-depleted device according to claim 1, Features: The control system is provided with an alarm, and the alarm is respectively connected with the first oxygen meter and the second oxygen meter signals.

5. The filling oxygen-depleted device according to claim 1, Features: The oxygen-depleted filling device further comprises a first discharge pipe connected to the mixer, a fourth electric valve is arranged on the first discharge pipe, and the fourth electric valve is electrically connected to the control system.

6. The filling oxygen-depleted device according to claim 1, Features: The oxygen-depleted filling device further comprises a second discharge pipe connected to the buffer tank, a fifth electric valve is arranged on the second discharge pipe, and the fifth electric valve is electrically connected to the control system.

7. The filling oxygen-depleted device according to claim 6, Features: The second discharge pipe is disposed on the top of the buffer tank.

8. The filling oxygen-depleted device according to claim 1, Features: The oxygen-depleted filling device further comprises an exhaust pipe connected to the buffer tank, and an exhaust valve is arranged on the exhaust pipe.

9. The filling oxygen-depleted device according to claim 8, Features: The drain pipe is connected to the bottom of the buffer tank.

10. The filling oxygen-depleted device according to claim 1, Features: The buffer tank is also provided with a safety valve.

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