CN213455783U

CN213455783U - Methanol metering tank with nitrogen sealing system

Info

Publication number: CN213455783U
Application number: CN202022373445.8U
Authority: CN
Inventors: 杨晓辉
Original assignee: Changxing Synthetic Resin Changshu Co Ltd
Current assignee: Changxing Synthetic Resin Changshu Co Ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-06-15
Anticipated expiration: 2030-10-22

Abstract

The utility model discloses a methyl alcohol metering tank with nitrogen system of sealing, including cell body, loading unit, first manometer, first breather valve, first outlet duct, intake pipe, relief pressure valve and nitrogen gas source, the cell body is equipped with methyl alcohol pan feeding mouth and methyl alcohol discharge gate, loading unit sets up be close to on the cell body the one end of methyl alcohol pan feeding mouth, first manometer sets up in order to detect on the cell body atmospheric pressure in the cell body, first outlet duct with the cell body intercommunication, first breather valve sets up on the first outlet duct, the one end of intake pipe with the cell body intercommunication, the other end of intake pipe with the nitrogen gas source intercommunication, the relief pressure valve sets up in the intake pipe. This scheme has the advantage that improves metering tank operation security through nitrogen system of sealing.

Description

Methanol metering tank with nitrogen sealing system

Technical Field

The utility model relates to a resin production technical field, specifically a methyl alcohol metering tank with nitrogen seals system.

Background

In the resin production process, there is usually a step of mixing methanol and xylene in a certain proportion into a solution and then dissolving a polymerization inhibitor. Before mixing, the methanol is pumped into a metering tank by a pump for metering (weighing), and the metered methanol enters a mixing tank through a pipeline at the bottom of the metering tank.

In order to facilitate the discharge of methanol from the measuring tank, the pressure in the measuring tank needs to be kept within a certain range, that is, the pressure in the tank needs to have an upper limit value and a lower limit value. At present, the common operation mode is that enough air is introduced into the metering tank to make the air pressure in the tank meet the requirement. However, since methanol is a class a substance, its flash point is low, and there is a risk of static electricity generation and even explosion when methanol flows in a metering tank with air during feeding. Therefore, how to reduce the above-mentioned risks and improve the safety of the operation of the metering tank is a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the embodiment of the utility model provides a methanol metering tank with nitrogen sealing system, which is used for solving at least one of the above problems.

The embodiment of the application discloses: the utility model provides a methyl alcohol metering tank with nitrogen seals system, includes cell body, loading unit, first manometer, first breather valve, first outlet duct, intake pipe, relief pressure valve and nitrogen gas source, the cell body is equipped with methyl alcohol pan feeding mouth and methyl alcohol discharge gate, loading unit sets up be close to on the cell body the one end of methyl alcohol pan feeding mouth, first manometer sets up in order to detect on the cell body atmospheric pressure in the cell body, first outlet duct with the cell body intercommunication, first breather valve sets up on the first outlet duct, the one end of intake pipe with the cell body intercommunication, the other end of intake pipe with the nitrogen gas source intercommunication, the relief pressure valve sets up in the intake pipe.

Specifically, the air inlet pipe is further provided with a flowmeter, and the flowmeter is located on one side of the output end of the pressure reducing valve.

Specifically, still be equipped with the needle valve in the intake pipe, the needle valve sets up output one side of flowmeter.

Specifically, a second pressure gauge is further arranged on the air inlet pipe and located between the pressure reducing valve and the flowmeter.

Specifically, the intake pipe includes first hard tube, second hard tube and hose, the hose is used for connecting first hard tube with the second hard tube, first hard tube deviates from the one end of hose with the nitrogen gas source intercommunication, the second hard tube deviates from the one end of hose with the cell body intercommunication.

Specifically, the first hard pipe and/or the second hard pipe is a stainless steel pipe.

Specifically, the hose is a metal hose.

Specifically, the air inlet pipe is further provided with a first switch valve, and the first switch valve is located on one side of the input end of the pressure reducing valve.

Specifically, methanol metering tank with nitrogen sealing system still includes second outlet duct, second breather valve and second ooff valve, the second outlet duct with the cell body intercommunication, the second breather valve with the second ooff valve sets up on the second outlet duct, the second ooff valve is located input one side of second breather valve.

The utility model discloses following beneficial effect has at least:

according to the methanol metering tank with the nitrogen sealing system, the nitrogen sealing system is arranged in the tank body by introducing nitrogen into the tank body, and as the nitrogen is a non-combustible gas, even if the methanol flows into the tank body to generate static electricity, the methanol cannot contact with the air under the isolation effect of the nitrogen, so that the risk of explosion cannot be generated; and the first breather valve can ensure that the air pressure in the tank body is too high to cause danger, and when the air pressure in the tank body is reduced to be lower than the lower limit value, the pressure reducing valve can be opened to supplement air in the tank body.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a methanol metering tank with a nitrogen sealing system according to an embodiment of the present invention.

Reference numerals of the above figures: 1. a trough body; 11. a methanol feeding port; 12. a methanol discharge hole; 2. a load cell; 3. a first pressure gauge; 4. a first breather valve; 5. a first air outlet pipe; 6. an air inlet pipe; 61. a first rigid tube; 62. a second rigid tube; 63. a hose; 7. a pressure reducing valve; 8. a flow meter; 9. a needle valve; 20. a second pressure gauge; 30. a first on-off valve; 40. a second air outlet pipe; 50. a second breather valve; 60. and a second on-off valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the methanol metering tank with a nitrogen sealing system of the present embodiment includes a tank body 1, a load cell 2, a first pressure gauge 3, a first breather valve 4, a first air outlet pipe 5, an air inlet pipe 6, a pressure reducing valve 7, and a nitrogen source (not shown).

The tank body 1 is provided with a methanol feeding port 11 and a methanol discharging port 12, preferably, the methanol feeding port 11 is located at the upper end of the tank body 1, the methanol discharging port 12 is located at the lower end of the tank body 1, the loading unit 2 is arranged at one end, close to the methanol feeding port 11, of the tank body 1, and the loading unit 2 is used for measuring the weight of the fed methanol. The first pressure gauge 3 is arranged on the tank body 1 to detect the air pressure in the tank body 1, and preferably, is arranged at the upper end of the tank body 1.

First outlet duct 5 and cell body 1 intercommunication, first breather valve 4 sets up on first outlet duct 5, and the atmospheric pressure in the cell body 1 has upper limit value and lower limit value, and when the atmospheric pressure in the cell body 1 was greater than the upper limit value of first breather valve 4, partial gas can be discharged to the atmospheric environment outside the cell body 1 through first breather valve 4 to make the atmospheric pressure in the cell body 1 reach normal range. One end of the air inlet pipe 6 is communicated with the tank body 1, the other end of the air inlet pipe is communicated with a nitrogen source, and the pressure reducing valve 7 is arranged on the air inlet pipe 6. The outlet pressure (output end pressure) of the pressure reducing valve 7 can be set within the range of the pressure value according to the range of the required pressure value in the tank body 1, when the pressure of nitrogen in the tank body 1 reaches the range of the preset pressure value, the pressure reducing valve 7 can be closed, so that the gas in the nitrogen source is stopped to be input into the tank body 1 again, and when the pressure in the tank body 1 is reduced after a period of feeding and discharging, the pressure reducing valve 7 can be opened to appropriately supplement the gas in the tank body 1.

By means of the structure, the methanol metering tank with the nitrogen sealing system in the embodiment has the nitrogen sealing system in the tank body 1 by introducing nitrogen into the tank body 1, and as the nitrogen is a non-combustible gas, even if methanol flows into the tank body 1 to generate static electricity, the methanol cannot contact with air under the isolation effect of the nitrogen, so that the risk of explosion is avoided; the first breather valve 4 can ensure that the air pressure in the tank body 1 is too high to cause danger.

Specifically, as shown in fig. 1, the intake pipe 6 may further be provided with a flow meter 8, and the flow meter 8 is located on the output side of the pressure reducing valve 7. Furthermore, the air inlet pipe 6 can be provided with a needle valve 9, and the needle valve 9 is positioned on one side of the output end of the flowmeter 8. The flow meter 8 can be used for detecting the flow rate of the gas output from the pressure reducing valve 7 and monitoring the nitrogen gas supplementing speed, and the needle valve 9 can be used for accurately adjusting the flow rate of the nitrogen gas so that the nitrogen gas supplementing speed is in a reasonable range.

Specifically, as shown in fig. 1, a second pressure gauge 20 may be further disposed on the air pipe, and the second pressure gauge 20 is located between the pressure reducing valve 7 and the flow meter 8. The second pressure gauge 20 may be used to monitor whether the pressure of the nitrogen gas after being reduced by the pressure reducing valve 7 is normal.

Specifically, as shown in fig. 1, the air inlet pipe 6 may include a first hard pipe 61, a second hard pipe 62 and a hose 63. The hose 63 is used for connecting the first hard pipe 61 and the second hard pipe 62, one end of the first hard pipe 61 departing from the hose 63 (not connected with the hose 63) is communicated with the nitrogen gas source, and one end of the second hard pipe 62 departing from the hose 63 (not connected with the hose 63) is communicated with the tank body 1. Further, the first rigid pipe 61 and/or the second rigid pipe 62 may be a stainless steel pipe, and the flexible pipe 63 may be a metal flexible pipe 63. Preferably, the needle valve 9, the flow meter 8, the second pressure gauge 20 and the pressure reducing valve 7 may be disposed on the first hard pipe 61. Adopt above-mentioned mode, intake pipe 6 can only be connected with cell body 1 through a small segment hard tube (be second hard tube 62), and this small segment hard tube adopts the mode flexible connection of hose 63 with most hard tube (be first hard tube 61) of intake pipe 6, so, can reduce whole intake pipe 6 and the influence of last part to cell body 1, and then has reduced intake pipe 6 to the influence of loading unit 2, has improved the stability and the accuracy of measurement.

Specifically, as shown in fig. 1, the air inlet pipe 6 may further be provided with a first switch valve 30, and the first switch valve 30 is located on one side of the input end of the pressure reducing valve 7, that is, the nitrogen output from the nitrogen source passes through the first switch valve 30 and then the pressure reducing valve 7. The first switch valve 30 is convenient for cutting off the output of the nitrogen source when the tank body 1 is overhauled.

With continued reference to fig. 1, the methanol metering tank with nitrogen sealing system of the present embodiment may further include a second outlet pipe 40, a second breather valve 50, and a second on-off valve 60. The second air outlet pipe 40 is communicated with the tank body 1 and can be arranged at the upper end of the tank body 1, the second breather valve 50 and the second switch valve 60 are both arranged on the second air outlet pipe 40, and the second switch valve 60 is positioned at one side of the input end of the second breather valve 50. Second breather valve 50 can exist as the dual fail-safe with first breather valve 4, and under the normal condition, can preferentially adopt first breather valve 4 to carry out the decompression of exhausting to cell body 1, consequently, second ooff valve 60 is in normally closed state, if first breather valve 4 breaks down, can open second ooff valve 60 and come the decompression work of exhausting to cell body 1 in order to launch second breather valve 50, ensures that cell body 1 can normally work.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The utility model provides a methyl alcohol metering tank with nitrogen seals system, a serial communication port, including cell body, loading unit, first manometer, first breather valve, first outlet duct, intake pipe, relief pressure valve and nitrogen gas source, the cell body is equipped with methyl alcohol pan feeding mouth and methyl alcohol discharge gate, loading unit sets up be close to on the cell body the one end of methyl alcohol pan feeding mouth, first manometer sets up in order to detect on the cell body atmospheric pressure in the cell body, first outlet duct with the cell body intercommunication, first breather valve sets up on the first outlet duct, the one end of intake pipe with the cell body intercommunication, the other end of intake pipe with nitrogen gas source intercommunication, the relief pressure valve sets up in the intake pipe.

2. The methanol metering tank with the nitrogen sealing system as claimed in claim 1, wherein a flow meter is further arranged on the air inlet pipe, and the flow meter is positioned on the output end side of the pressure reducing valve.

3. The methanol metering tank with the nitrogen sealing system as claimed in claim 2, wherein the air inlet pipe is further provided with a needle valve, and the needle valve is arranged on one side of the output end of the flow meter.

4. The methanol metering tank with the nitrogen sealing system as claimed in claim 2, wherein a second pressure gauge is further arranged on the air inlet pipe, and the second pressure gauge is located between the pressure reducing valve and the flow meter.

5. The methanol metering tank with the nitrogen sealing system as claimed in claim 1, wherein the air inlet pipe comprises a first hard pipe, a second hard pipe and a hose, the hose is used for connecting the first hard pipe and the second hard pipe, one end of the first hard pipe, which is far away from the hose, is communicated with the nitrogen gas source, and one end of the second hard pipe, which is far away from the hose, is communicated with the tank body.

6. The methanol metering tank with nitrogen seal system of claim 5, wherein the first hard pipe and/or the second hard pipe is a stainless steel pipe.

7. The methanol metering tank with the nitrogen sealing system of claim 5, wherein the hose is a metal hose.

8. The methanol metering tank with the nitrogen sealing system as claimed in claim 1, wherein a first on-off valve is further arranged on the air inlet pipe, and the first on-off valve is positioned on the input end side of the pressure reducing valve.

9. The methanol metering tank with the nitrogen sealing system as claimed in claim 1, further comprising a second air outlet pipe, a second breather valve and a second switch valve, wherein the second air outlet pipe is communicated with the tank body, the second breather valve and the second switch valve are arranged on the second air outlet pipe, and the second switch valve is positioned on one side of the input end of the second breather valve.