CN109760944B - Liquid sealing method of o-nitro-p-methylsulfonyl benzoic acid production matched device - Google Patents
Liquid sealing method of o-nitro-p-methylsulfonyl benzoic acid production matched device Download PDFInfo
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- CN109760944B CN109760944B CN201910203506.5A CN201910203506A CN109760944B CN 109760944 B CN109760944 B CN 109760944B CN 201910203506 A CN201910203506 A CN 201910203506A CN 109760944 B CN109760944 B CN 109760944B
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- liquid
- collecting tank
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- pipe
- negative pressure
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- 239000007788 liquid Substances 0.000 title claims abstract description 272
- 238000007789 sealing Methods 0.000 title claims abstract description 94
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 57
- QNOUABMNRMROSL-UHFFFAOYSA-N 110964-79-9 Chemical compound CS(=O)(=O)C1=CC=C(C(O)=O)C([N+]([O-])=O)=C1 QNOUABMNRMROSL-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003860 storage Methods 0.000 claims abstract description 46
- 230000001502 supplementing effect Effects 0.000 claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000002360 explosive Substances 0.000 abstract description 6
- 238000004880 explosion Methods 0.000 abstract description 3
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 abstract description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 abstract description 2
- 229910052755 nonmetal Inorganic materials 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract description 2
- 239000013589 supplement Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 238000004140 cleaning Methods 0.000 description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention relates to a liquid sealing method of o-nitro p-methylsulfonyl benzoic acid production matching device, which adopts a limited liquid sealing structure, in acetylene production, a liquid sealing medium is water, water evaporation increases the moisture content, static electricity is eliminated, and explosion is prevented; because the air supplementing and discharging port on the positive pressure liquid collecting tank can be connected with the air supplementing tank, when the pressure of the equipment is low, air or stored air enters the storage tank through the air supplementing tank so as to keep the positive pressure, and the system is prevented from generating negative pressure to damage the equipment (in particular to a non-metal lining normal pressure container); when the pressure of the storage tank or the production system containing the volatilizable inflammable and explosive medium is low, the invention can supplement the needed gas storage into the storage tank or the production system through the gas supplementing and discharging port so as to keep the positive pressure of the gas storage tank or the production system and prevent air from entering the storage tank or the production system to form explosive mixed gas, thus greatly improving the safety performance.
Description
Technical Field
The invention belongs to the technical field of liquid sealing, and particularly relates to a liquid sealing method of an o-nitro-p-methylsulfonyl benzoic acid production matching device, which is convenient to use and high in safety performance.
Background
In the process of filling the nitric acid storage tank used in the production of the o-nitro-p-methylsulfonyl benzoic acid, the pressure in the tank rises, and the installed reverse water seal cannot exhaust, so that the storage tank is expanded and deformed. The invention can be used as a positive pressure liquid seal and a negative pressure liquid seal.
The system is widely applied, besides the liquid seal of the nitric acid storage tank, the system can be applied to storage tanks of various mediums, such as various liquid storage tanks of acid, alkali, volatile liquid, inflammable and explosive and the like, by adjusting the sizes of liquid seal media, liquid seal pipes, the heights of a positive pressure liquid collecting tank and a negative pressure liquid collecting tank or introducing protective inert gas and additionally installing corresponding automatic interlocking devices.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a liquid sealing method of an o-nitro-p-methylsulfonyl benzoic acid production matching device, which is convenient to use and high in safety performance.
The liquid sealing method of the o-nitro-p-methylsulfonylbenzoic acid production matching device is used for liquid sealing of a storage tank or a production system 1 of the o-nitro-p-methylsulfonylbenzoic acid production matching device, and the adopted liquid sealing device comprises a positive pressure liquid collecting tank and a negative pressure liquid collecting tank; the method is characterized by comprising the following steps of:
1) A, C is marked on the upper and lower ends of the reverse liquid seal section respectively, the AC section is a reverse liquid seal, A, B is marked on the upper and lower ends of the reverse liquid seal insertion pipe section respectively, and the liquid seal pressure P1=ρ is achieved Liquid seal *g*h A-C Wherein ρ is Liquid seal The density of the liquid sealing medium is 9.8N/kg, h A-C The height of the section A-C can be set to be the height of the section A-C which can extend into the negative pressure liquid collecting tank through the AB pipe;
2) E, D is marked on the upper and lower ends of the positive liquid seal section respectively, the DE section is a positive liquid seal, and the liquid seal pressure P2=ρ is achieved Liquid seal *g*h D-E Wherein ρ is Liquid seal The density of the liquid sealing medium is 9.8N/kg, h D-E The D-E height can be set to be the required positive liquid seal pressure by adjusting the height of the DE pipe section;
3) When the storage tank or the production system is under negative pressure, the liquid sealing liquid in the liquid sealing pipe flows into the negative pressure liquid collecting tank under the action of the negative pressure until the pressure is balanced; when the negative pressure of the storage tank or the production system is greater than P1, all liquid sealing liquid in the liquid sealing pipe is pumped into the negative pressure liquid collecting tank, and air in the air or the air supplementing tank enters the positive pressure liquid collecting tank through the air supplementing and discharging port, and then is supplemented into the storage tank or the production system through the liquid sealing pipe until the pressure is balanced;
4) When the storage tank or the production system is positive in pressure, under the action of the positive pressure, the liquid seal liquid in the liquid seal pipe is hydraulically filled into the positive pressure liquid collecting tank until the pressure is balanced; when the positive pressure of the storage tank or the production system is larger than P2, all the liquid sealing liquid in the liquid sealing pipe is pressed into the positive pressure liquid collecting tank, and the gas of the storage tank or the production system sequentially enters the positive pressure liquid collecting tank through the negative pressure liquid collecting tank and the liquid sealing pipe and is finally discharged through the air supplementing and discharging port or is collected by the tail gas absorption system.
The liquid sealing method of the o-nitro p-methylsulfonyl benzoic acid production matching device is characterized in that a liquid sealing pipe is of a sectional structure and is formed by sequentially connecting a first connecting pipe section, a positive liquid sealing section, a second connecting pipe section and a reverse liquid sealing section, a liquid filling opening is formed in the top of the positive liquid sealing section, a branch pipe is formed in the side face of the positive liquid sealing section and connected with one end of the first connecting pipe section, the reverse liquid sealing section comprises a reverse liquid sealing connecting pipe section and a reverse liquid sealing inserting pipe section, and the part of the reverse liquid sealing inserting pipe section stretches into a negative pressure liquid collecting tank.
The liquid sealing method of the o-nitro p-methylsulfonyl benzoic acid production matching device is characterized in that when all liquid in a liquid sealing pipe flows into a negative pressure liquid collecting tank, the liquid level is lower than the height of a reverse liquid sealing inserting pipe section extending into the negative pressure liquid collecting tank.
The liquid sealing method of the o-nitro p-methylsulfonyl benzoic acid production matching device is characterized in that the upper part of the positive liquid sealing section is provided with a sight glass.
The liquid sealing method of the o-nitro p-methylsulfonyl benzoic acid production matching device is characterized in that liquid level meters are respectively arranged on the negative pressure liquid collecting tank and the positive pressure liquid collecting tank.
The liquid sealing method of the o-nitro-p-methylsulfonyl benzoic acid production matching device is characterized in that the air supplementing and discharging port is directly vented, or is connected with an exhaust gas absorption system or an air supplementing groove.
The liquid sealing method of the o-nitro p-methylsulfonyl benzoic acid production matching device is characterized in that valves are respectively arranged on the first clean outlet, the second clean outlet and the liquid adding port.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects:
the invention adopts the liquid seal structure of the o-nitro p-methylsulfonyl benzoic acid production matching device, the structure is simple, only three valves are arranged in the whole structure and are respectively used for supplementing water or draining water, the invention combines the positive liquid seal and the reverse liquid seal into a whole by adopting the technology, the structure can be used for all storage tanks and storage tanks needing to be additionally provided with the liquid seal, the forward flow of gas can be effectively ensured, no backflow occurs, and the structure of the invention is equivalent to a one-way check valve; if the storage tank of the volatilizable inflammable and explosive medium is tempered and exploded, the storage tank plays a role in partition, so that the safety of cleaning equipment is ensured, which is equivalent to the role of a flame arrester; the invention can select different mediums, thus can adjust the gas moisture content of the storage tank according to the need, reduce the danger of some explosions, the device of the invention is equivalent to the humidification, dehumidifier at this moment, if the device of the invention is applied in acetylene production, the liquid sealing medium is water, the water evaporates and increases the moisture content, dispel the static, prevent the explosion; because the air supplementing and discharging port on the positive pressure liquid collecting tank can be connected with the air supplementing tank, when the pressure of the equipment is low, air or stored air enters the storage tank through the air supplementing tank so as to keep the positive pressure, and the system is prevented from generating negative pressure to damage the equipment (in particular to a non-metal lining normal pressure container); when the pressure of the storage tank or the production system containing the volatilizable inflammable and explosive medium is low, the invention can supplement the needed gas storage into the storage tank or the production system through the gas supplementing and discharging port so as to keep the positive pressure of the gas storage tank or the production system and prevent air from entering the storage tank or the production system to form explosive mixed gas, thus greatly improving the safety performance.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1-storage tank or production system, 2-negative pressure liquid collecting tank, 3-liquid seal pipe, 301-first connecting pipe section, 302-positive liquid seal section, 303-second connecting pipe section, 304-reverse liquid seal section, 304 a-reverse liquid seal connecting pipe section, 304 b-reverse liquid seal inserting pipe section, 4-positive pressure liquid collecting tank, 401-second cleaning outlet, 402-air supplementing outlet and 5-liquid adding port.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings, but the scope of the invention is not limited thereto:
as shown in figure 1, the liquid sealing structure of the o-nitro-p-methylsulfonyl benzoic acid production matching device is used for a storage tank or a production system 1 and comprises a positive pressure liquid collecting tank 4 and a negative pressure liquid collecting tank 2, wherein the storage tank or the production system 1 is connected with the negative pressure liquid collecting tank 2 through a pipeline, the negative pressure liquid collecting tank 2 is connected with the positive pressure liquid collecting tank 4 through a liquid sealing pipe 3, one end of the liquid sealing pipe 3 is inserted into the negative pressure liquid collecting tank 2 from the bottom of the negative pressure liquid collecting tank 2, the other end of the liquid sealing pipe 3 is connected with the positive pressure liquid collecting tank 4, liquid sealing liquid is filled in the liquid sealing pipe 3, a liquid filling opening 5 is arranged on the liquid sealing pipe 3, a first cleaning outlet 201 is arranged at the bottom of the negative pressure liquid collecting tank 2, a second cleaning outlet 401 is arranged at the bottom of the positive pressure liquid collecting tank 4, a gas supplementing and discharging opening 402 is arranged on the side surface, and valves are respectively arranged on the first cleaning outlet 201, the second cleaning outlet 401 and the liquid filling opening 5.
In order to facilitate improving the convenience of use, the liquid seal pipe 3 is of a sectional structure, and is formed by sequentially connecting a first connecting pipe section 301, a positive liquid seal section 302, a second connecting pipe section 303 and a reverse liquid seal section 304, wherein the top of the positive liquid seal section 302 is provided with a liquid filling port 5, the positive liquid seal section 302 can be formed by connecting a three-way pipe section, a cylindrical section and an arc section, one opening of the three-way pipe section is used as the liquid filling port 5, the other opening of the three-way pipe section is connected with the first connecting pipe section 301, and the third opening of the three-way pipe section is connected with the cylindrical section and the second connecting pipe section 303; the reverse liquid seal section 304 includes a reverse liquid seal connecting pipe section 304a connected to the second connecting pipe section 303 and a reverse liquid seal inserting pipe section 304b partially extending into the negative pressure liquid collecting tank 2.
In order to prevent suck-back, the invention limits the height of the reverse liquid seal inserting pipe section 304b extending into the negative pressure liquid collecting tank 2, namely, when all the liquid in the liquid seal pipe 3 flows into the negative pressure liquid collecting tank 2, the liquid level height is lower than the height of the reverse liquid seal inserting pipe section 304b extending into the negative pressure liquid collecting tank 2.
In order to facilitate operation, the invention is provided with a sight glass at the upper part of the positive liquid seal section 302 for observing the position of the liquid seal liquid level, and the installation height of the sight glass is the same as the height of the reverse liquid seal inserting pipe section 304b in the negative pressure liquid collecting tank 2; the negative pressure liquid collecting tank 2 and the positive pressure liquid collecting tank 4 are respectively provided with a liquid level meter.
As shown in the figure, the liquid sealing method based on the liquid sealing structure shown in fig. 1 comprises the following steps:
1) A, C is marked on the upper and lower ends of the reverse liquid seal section 304, the AC section is a reverse liquid seal, A, B is marked on the upper and lower ends of the reverse liquid seal insertion pipe section 304b, and the liquid seal pressure p1=ρ is achieved Liquid seal *g*h A-C Wherein ρ is Liquid seal The density of the liquid sealing medium is 9.8N/kg, h A-C The height of the section A-C can be set to be the height of the section A-C which can extend into the negative pressure liquid collecting tank 2 through the AB pipe;
2) The upper and lower ends of the positive liquid seal section 302 are respectivelyThe DE section is marked E, D as positive liquid seal, liquid seal pressure p2=ρ Liquid seal *g*h D-E Wherein ρ is Liquid seal The density of the liquid sealing medium is 9.8N/kg, h D-E The D-E height can be set to be the required positive liquid seal pressure by adjusting the height of the DE pipe section;
3) When the storage tank or the production system 1 is under negative pressure, the liquid sealing liquid in the liquid sealing pipe 3 flows into the negative pressure liquid collecting tank 2 to balance the pressure; when the negative pressure of the storage tank or the production system 1 is larger than P1, all liquid sealing liquid in the liquid sealing pipe 3 is pumped into the negative pressure liquid collecting tank 2, and meanwhile, air or gas in the air supplementing tank enters the positive pressure liquid collecting tank 4 through the air supplementing and discharging port 402 and is supplemented into the storage tank or the production system 1 through the liquid sealing pipe 3 until the pressure is balanced;
4) When the storage tank or the production system 1 is positive in pressure, under the action of the positive pressure, the liquid sealing liquid in the liquid sealing pipe 3 is pressed into the positive pressure liquid collecting tank 4 until the pressure is balanced; when the positive pressure of the storage tank or the production system 1 is larger than P2, all the liquid sealing liquid in the liquid sealing pipe 3 is pressed into the positive pressure liquid collecting tank 4, and the gas of the storage tank or the production system 1 sequentially enters the positive pressure liquid collecting tank 4 through the negative pressure liquid collecting tank 2 and the liquid sealing pipe 3 and finally is discharged through the air supplementing and discharging port 402 or is collected by the tail gas absorption system.
Claims (6)
1. A liquid sealing method of an o-nitro-p-methylsulfonylbenzoic acid production matching device is used for liquid sealing of a storage tank or a production system (1) of the o-nitro-p-methylsulfonylbenzoic acid production matching device, the adopted liquid sealing device comprises a positive pressure liquid collecting tank (4) and a negative pressure liquid collecting tank (2), the storage tank or the production system (1) is connected with the negative pressure liquid collecting tank (2) through a pipeline, the negative pressure liquid collecting tank (2) is connected with the positive pressure liquid collecting tank (4) through a liquid sealing pipe (3), one end of the liquid sealing pipe (3) is inserted into the negative pressure liquid collecting tank (2) from the bottom of the negative pressure liquid collecting tank (2), the other end of the liquid sealing pipe (3) is connected with the positive pressure liquid collecting tank (4), liquid sealing liquid is filled in the liquid sealing pipe (3), a liquid filling opening (5) is arranged on the liquid sealing pipe (3), a first clean discharging opening (201) is arranged at the bottom of the negative pressure liquid collecting tank (2), a second clean discharging opening (401) is arranged at the bottom of the positive pressure liquid collecting tank (4), a gas supplementing opening (402) is arranged on the side face, the liquid supplementing opening (402) is used for exhausting or supplementing gas, the liquid sealing pipe (3) is used for connecting with the positive pressure liquid sealing pipe (3) through a liquid sealing pipe (3), a first connecting pipe (301) and a second connecting pipe (301) is connected with a positive pressure liquid sealing pipe (301) in turn, a liquid sealing pipe (301) and a liquid sealing pipe (2, the reverse liquid seal section (304) comprises a reverse liquid seal connecting pipe section (304 a) and a reverse liquid seal inserting pipe section (304 b), the reverse liquid seal inserting pipe section (304 b) partially stretches into the negative pressure liquid collecting groove (2), the first connecting pipe section (301) and the second connecting pipe section (303) are arranged in the horizontal direction, the positive liquid seal section (302) and the reverse liquid seal section (304) are arranged in the vertical direction,
the method is characterized by comprising the following steps of:
1) A, C is marked on the upper and lower ends of the reverse liquid seal section (304), the AC section is a reverse liquid seal, A, B is marked on the upper and lower ends of the reverse liquid seal inserting pipe section (304 b), and the liquid seal pressure P1=ρ is achieved Liquid seal *g*h A-C Wherein ρ is Liquid seal The density of the liquid sealing medium is 9.8N/kg, h A-C The height of the section A-C can be set to be the height of the section A-C which can extend into the negative pressure liquid collecting tank (2) through the AB pipe;
2) E, D is marked on the upper and lower ends of the positive liquid seal section (302), the DE section is a positive liquid seal, and the liquid seal pressure P2=ρ Liquid seal *g*h D-E Wherein ρ is Liquid seal The density of the liquid sealing medium is 9.8N/kg, h D-E The D-E height can be set to be the required positive liquid seal pressure by adjusting the height of the DE pipe section;
3) When the storage tank or the production system (1) is under negative pressure, the liquid sealing liquid in the liquid sealing pipe (3) flows into the negative pressure liquid collecting tank (2) under the action of the negative pressure until the pressure is balanced; when the negative pressure of the storage tank or the production system (1) is larger than P1, liquid sealing liquid in the liquid sealing pipe (3) is completely pumped into the negative pressure liquid collecting tank (2), and air or gas in the air supplementing tank enters the positive pressure liquid collecting tank (4) through the air supplementing and discharging port (402) and is supplemented into the storage tank or the production system (1) through the liquid sealing pipe (3) until the pressure is balanced;
4) When the storage tank or the production system (1) is positive in pressure, under the action of the positive pressure, the liquid seal liquid in the liquid seal pipe (3) is pressed into the positive pressure liquid collection tank (4) until the pressure is balanced; when the positive pressure of the storage tank or the production system (1) is larger than P2, the liquid sealing liquid in the liquid sealing pipe (3) is completely pressed into the positive pressure liquid collecting tank (4), and the gas of the storage tank or the production system (1) sequentially enters the positive pressure liquid collecting tank (4) through the negative pressure liquid collecting tank (2) and the liquid sealing pipe (3), and finally is discharged through the air supplementing and discharging port (402) or is collected by the tail gas absorption system.
2. The liquid sealing method of the o-nitro-p-methylsulfonyl benzoic acid production matching device according to claim 1 is characterized in that when all liquid in the liquid sealing pipe (3) flows into the negative pressure liquid collecting tank (2), the liquid level is lower than the height of the reverse liquid sealing inserting pipe section (304 b) extending into the negative pressure liquid collecting tank (2).
3. The liquid sealing method of the o-nitro p-methylsulfonyl benzoic acid production kit according to claim 1 or 2, wherein the upper part of the positive liquid sealing section (302) is provided with a sight glass.
4. The liquid sealing method of the o-nitro-p-methylsulfonyl benzoic acid production matching device according to claim 1 is characterized in that liquid level meters are respectively arranged on the negative pressure liquid collecting tank (2) and the positive pressure liquid collecting tank (4).
5. The method for sealing the o-nitro-p-methylsulfonyl benzoic acid production kit according to claim 1, wherein the air supply and release port (402) is directly vented, or is connected with an exhaust gas absorption system or an air supply tank.
6. The liquid sealing method of the o-nitro-p-methylsulfonyl benzoic acid production kit according to claim 1 or 2, wherein valves are respectively arranged on the first clean outlet (201), the second clean outlet (401) and the liquid adding port (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910203506.5A CN109760944B (en) | 2019-03-18 | 2019-03-18 | Liquid sealing method of o-nitro-p-methylsulfonyl benzoic acid production matched device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910203506.5A CN109760944B (en) | 2019-03-18 | 2019-03-18 | Liquid sealing method of o-nitro-p-methylsulfonyl benzoic acid production matched device |
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| Publication Number | Publication Date |
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| CN109760944A CN109760944A (en) | 2019-05-17 |
| CN109760944B true CN109760944B (en) | 2024-03-29 |
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| CN201910203506.5A Active CN109760944B (en) | 2019-03-18 | 2019-03-18 | Liquid sealing method of o-nitro-p-methylsulfonyl benzoic acid production matched device |
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| CN109760944A (en) | 2019-05-17 |
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