CN108398968B - Automatic protection control device for glass fiber reinforced plastic hydrochloric acid storage tank - Google Patents
Automatic protection control device for glass fiber reinforced plastic hydrochloric acid storage tank Download PDFInfo
- Publication number
- CN108398968B CN108398968B CN201810376275.3A CN201810376275A CN108398968B CN 108398968 B CN108398968 B CN 108398968B CN 201810376275 A CN201810376275 A CN 201810376275A CN 108398968 B CN108398968 B CN 108398968B
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- China
- Prior art keywords
- hydrochloric acid
- storage tank
- glass fiber
- fiber reinforced
- reinforced plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 239000011152 fibreglass Substances 0.000 title claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 239000002253 acid Substances 0.000 claims abstract description 30
- 238000010521 absorption reaction Methods 0.000 claims abstract description 25
- 230000003068 static effect Effects 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000007789 gas Substances 0.000 abstract description 16
- 229910000041 hydrogen chloride Inorganic materials 0.000 abstract description 10
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 6
- 239000003513 alkali Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Treating Waste Gases (AREA)
- Paper (AREA)
Abstract
The invention relates to an automatic protection control device for a glass fiber reinforced plastic hydrochloric acid storage tank. The method aims at solving the problems that the pressure of a gas phase part in a tank body is changed severely due to liquid inlet and liquid discharge in the use process of the glass fiber reinforced plastic hydrochloric acid tank in the domestic chlor-alkali chemical industry at present, the tank is easy to burst or collapse, and hydrogen chloride gas directly overflows to pollute the environment. The invention adopts an automatic protection control device, and the pressure transmitter and the electric butterfly valve are arranged on the tank top, the acid discharge pump is arranged on the outer side of the tank bottom, and the hydrogen chloride gas absorption tower and the exhaust fan are arranged outside the tank, so that the glass fiber reinforced plastic hydrochloric acid storage tank can be safely used on the premise of meeting the environmental protection requirement. The invention is safe and reliable, has simple control, is convenient for inspection, is environment-friendly and economical, and effectively ensures the safe use of the hydrochloric acid storage tank.
Description
Technical Field
The invention belongs to the field of machinery, and particularly relates to an automatic protection control device for a glass fiber reinforced plastic hydrochloric acid storage tank.
Background
In the chlor-alkali chemical industry, high-concentration hydrochloric acid in a glass fiber reinforced plastic hydrochloric acid storage tank has strong corrosiveness and volatility, so that the storage tank is generally made of glass fiber reinforced plastic or other anti-corrosion materials, the pressure in the storage tank can be changed in the liquid feeding and discharging processes, positive pressure can be generated in the liquid feeding process, negative pressure is generated in the liquid discharging process, and accidents of tank breakage are easily caused. At present, one common protection mode of the hydrochloric acid storage tank is to adopt an atmosphere communicating pipe which is directly kept communicated with the atmosphere to directly discharge volatile hydrogen chloride gas into the atmosphere, so that the storage tank is kept at normal pressure, and the safety of the storage tank is ensured; in addition, a breather is designed and installed at the top of the storage tank to regulate the pressure in the tank, and the volatile hydrogen chloride gas is recycled by the absorption tower through the waste gas absorption pipeline. The adoption of the atmosphere communicating pipe has high reliability, but volatile gas can enter the atmosphere to cause environmental pollution; when the breather is adopted for pressure regulation, the degradation of the breather material, failure of the elastic sheet, blockage and adhesion by residue crystallization are easy to occur due to corrosion, so that the sensitivity is reduced and even fails, the pressure can not be released in time when the liquid is fed and discharged from the storage tank, the safety and reliability of the storage tank are reduced, and the storage tank is broken when serious, so that a safety accident is caused.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides the automatic protection control device for the glass fiber reinforced plastic hydrochloric acid storage tank, which has the advantages of high degree of automation, wide control range, strong applicability and high reliability.
The invention adopts the following technical scheme:
the automatic protection control device for the glass fiber reinforced plastic hydrochloric acid storage tank is characterized by comprising the glass fiber reinforced plastic hydrochloric acid storage tank (1), a pressure transmitter (2), a static pressure liquid level meter (8), an acid discharge pump (9), an absorption tower (10), an exhaust fan (13) and a control box (14); the control box (14) is provided with a wiring terminal block (18); the top of the glass fiber reinforced plastic hydrochloric acid storage tank (1) is provided with a pressure transmitter (2), a check valve (3), a stop valve (4) and an electric butterfly valve (5), positive and negative terminals of the pressure transmitter (2) are connected with the wiring terminal row (18) through a transmission cable (16), the check valve (3) is connected with the lower part of the absorption tower (10) through a pipeline (6), the stop valve (4) is connected with a hydrochloric acid liquid inlet pipeline (7), and positive and negative terminals of the electric butterfly valve (5) are connected with the wiring terminal row (18) through a control cable (15); the lower part of the glass fiber reinforced plastic hydrochloric acid storage tank (1) is provided with a static pressure liquid level meter (8) and a liquid outlet flange, the liquid outlet flange is connected with a bottom valve of the acid discharge pump (9) through a suction pipe and is positioned on the same horizontal plane, a liquid outlet of the acid discharge pump (9) is connected with a discharge pipe, positive and negative terminals of the static pressure liquid level meter (8) and the acid discharge pump (9) are respectively connected with a wiring terminal row (18) through a transmission cable (17) and a control cable (23), and the electric butterfly valve (5) and the acid discharge pump (9) are controlled in an interlocking manner; the exhaust fan (13) is communicated with the atmosphere through an exhaust pipeline (12) and is connected with the top of the absorption tower (10) and the wiring terminal row (18) through pipelines and a control cable (24) respectively; the absorption tower (10) is provided with an absorption liquid inlet pipeline (11).
The device is characterized in that the control box (14) is provided with a touch screen (19), a direct-current power supply (20), an alternating-current contactor (21) for controlling an acid discharge pump, an alternating-current contactor (22) for controlling an exhaust fan, a 380v alternating-current power supply (25) and an embedded controller (26), and the direct-current power supply (20) is respectively connected with the embedded controller (26) and the touch screen (19) in 220v and 24 v.
The invention has the beneficial effects that: the invention adopts automatic protection control, can automatically set the working pressure of the exhaust fan and the acid discharge pump within the control range of the pressure transmitter according to the bearing capacity of the glass fiber reinforced plastic hydrochloric acid storage tank, and simultaneously achieves the effect of dual pressure regulation protection through the opening and closing of the electric butterfly valve, and has the effects of high automation degree, wide control range, strong applicability and high reliability; the electric butterfly valve and the acid discharge pump are controlled in an interlocking way, and the acid discharge pump can be started only in the state that the electric butterfly valve is opened, so that the ultra-negative pressure state is avoided in the liquid inlet and liquid discharge processes; the volatile hydrogen chloride gas is absorbed by the absorption tower and then discharged after reaching the standard, thus meeting the national environmental protection requirement, and meanwhile, the hydrogen chloride is recycled. The invention overcomes the defect that the prior art adopts the installation of the atmosphere communicating pipe to directly keep the atmosphere communicating pipe and directly exhaust the waste gas into the atmosphere to cause environmental pollution, and also solves the difficult problem that the prior art adopts the respirator pressure regulating protection device to lose the pressure regulating protection effect due to the point detection difficulty, the crystallization blockage and the corrosion failure.
Drawings
FIG. 1 is a schematic diagram of the structure of the device of the present invention;
fig. 2 is a control schematic of the device of the present invention.
Detailed Description
Referring to fig. 1, the automatic protection control device for the glass fiber reinforced plastic hydrochloric acid storage tank comprises a glass fiber reinforced plastic hydrochloric acid storage tank 1, a pressure transmitter 2, a static pressure liquid level meter 8, an acid discharge pump 9, an absorption tower 10, an exhaust fan 13 and a control box 14; the control box 14 is provided with a wiring terminal block 18; the top of the glass fiber reinforced plastic hydrochloric acid storage tank 1 is provided with a pressure transmitter 2, a check valve 3, a stop valve 4 and an electric butterfly valve 5, wherein positive and negative terminals of the pressure transmitter 2 are connected with a wiring terminal row 18 through a transmission cable 16, the pressure transmitter 2 detects pressure signals in real time, the detected pressure signals are transmitted to a control box 14 through the transmission cable 16, the check valve 3 is connected with the lower part of the absorption tower 10 through a pipeline 6, the stop valve 4 is connected with a hydrochloric acid liquid inlet pipeline 7, and positive and negative terminals of the electric butterfly valve 5 are connected with the wiring terminal row 18 through a control cable 15; the absorption tower 10 is provided with an absorption liquid inlet pipeline 11; the lower part of the glass fiber reinforced plastic hydrochloric acid storage tank 1 is provided with a static pressure liquid level meter 8 and an acid discharge pump 9, the positive and negative terminals of the static pressure liquid level meter 8 and the acid discharge pump 9 are respectively connected with a wiring terminal block 18 through a transmission cable 17 and a control cable 23, and the electric butterfly valve 5 and the acid discharge pump 9 are controlled in an interlocking way; the exhaust fan 13 is connected with the absorption tower 10 and the wiring terminal block 18 through a pipeline and a control cable 24 respectively and is communicated with the atmosphere through an exhaust pipeline. The control box 14 is provided with a touch screen 19, a direct current power supply 20, an alternating current contactor 21 for controlling an acid discharge pump, alternating current contactors 22 and 380v for controlling an exhaust fan, an alternating current power supply 25 and an embedded controller 26, wherein the direct current power supply 20 is 220v in input and 24v in output and is respectively connected with the embedded controller 26 and the touch screen 19.
When the glass fiber reinforced plastic hydrochloric acid storage tank 1 is fed with liquid, the stop valve 4 is opened, hydrochloric acid enters the hydrochloric acid storage tank 1 through the hydrochloric acid liquid inlet pipeline 7, the static pressure liquid level meter 8 sends liquid level signals into the control box 14 through the transmission cable 17 for liquid level monitoring, as the hydrochloric acid in the glass fiber reinforced plastic hydrochloric acid storage tank 1 is increased, the concentration of volatile hydrogen chloride gas rises, the gas volume space is reduced, a tiny positive pressure is generated, the pressure signal sent into the control box 14 by the pressure transmitter 2 is greater than 0, the exhaust fan 13 is automatically opened, the volatile hydrogen chloride gas enters the absorption tower 10 through the pipeline 6 and is absorbed by absorption liquid, the residual tail gas meeting the emission standard is discharged into the atmosphere through the exhaust pipeline 12, when the pressure signal sent into the control box 14 by the pressure transmitter 2 is less than 0, the electric butterfly valve 5 is opened to supplement air into the glass fiber reinforced plastic hydrochloric acid storage tank 1, when the pressure signal sent into the control box 14 by the pressure transmitter 2 is reduced to be less than-300 Pa, the operation of the exhaust fan 13 is stopped, the liquid level value reaches the upper limit set by the static pressure liquid level meter 8, the stop valve 4 is closed, and the liquid inlet is completed.
When the glass fiber reinforced plastic hydrochloric acid storage tank 1 discharges liquid, because the electric butterfly valve 5 and the acid discharge pump 9 adopt interlocking control, the acid discharge pump 9 can be started to discharge liquid outwards through the interlocking control only when the electric butterfly valve 5 is opened, when a pressure signal sent into the control box 14 by the pressure transmitter 2 is more than 0, the air discharge fan 13 is automatically started, hydrogen chloride gas in the glass fiber reinforced plastic hydrochloric acid storage tank 1 enters the absorption tower 10 through the pipeline 6, the pressure in the tank is reduced to form micro negative pressure, the hydrogen chloride gas can be prevented from being discharged into the atmosphere from the opened electric butterfly valve 5, when the pressure signal sent into the control box 14 by the pressure transmitter 2 is less than-300 Pa, the air discharge fan 13 stops running, the pressure in the tank is regulated by the electric butterfly valve 5 to restore the pressure in the glass fiber reinforced plastic hydrochloric acid storage tank 1 to normal pressure, the liquid level value reaches the lower limit set by the static pressure liquid level meter 8, the operation of the acid discharge pump 9 is stopped, and the liquid discharge is completed.
Referring to FIG. 2, the positive and negative terminals of the pressure transmitter 2 are connected to In1+ and In1-terminals of the terminal block 18, respectively, via the transmission cable 16, and the other ends of the In1+ and In1-terminals are connected to AO1+ and AO 1-terminals of the embedded controller 26, respectively; the exhaust fan 13 is connected with 3 terminals of the wiring terminal block 18 through a control cable 24, the other ends of the 3 terminals are respectively connected with 3 terminals of an alternating current contactor 22 for controlling the exhaust fan, and DO < 3+ > and DO < 3 > -terminals of the embedded controller 26 are respectively connected with coil terminals of the alternating current contactor 22 for controlling the exhaust fan; when the pressure transmitter 2 detects the pressure in the glass fiber reinforced plastic hydrochloric acid storage tank 1, the pressure in the tank is converted into a 4-20mA signal, after the pressure transmitter 2 detects that the pressure in the tank is higher than a set value, DO < 3+ > and DO < 3 > -terminals of the embedded controller 26 send control signals, an alternating current contactor 22 of an exhaust fan is closed and controlled, the exhaust fan 13 is started, gas in the glass fiber reinforced plastic hydrochloric acid storage tank 1 enters the absorption tower 10 through a check valve 3 and a pipeline 6, the absorption tower 10 absorbs harmful gas, and the gas reaching the standard after absorption is discharged into the atmosphere through an exhaust pipeline 12 connected with the exhaust fan 13. After the pressure transmitter 2 detects that the pressure in the glass fiber reinforced plastic hydrochloric acid storage tank 1 is lower than a set value, the DO < 3+ > and DO < 3 > -terminals of the embedded controller 26 send control signals, an alternating current contactor 22 for controlling the exhaust fan is started, the exhaust fan 13 is closed, and the exhaust is stopped.
The positive and negative terminals of the electric butterfly valve 5 are respectively connected with AO+ and AO-terminals of the wiring terminal block 18 through a control cable 15, and the other ends of the AO+ and AO-terminals are respectively connected with DO1+ and DO 1-terminals of the embedded controller 26. When the glass fiber reinforced plastic hydrochloric acid storage tank 1 is fed with liquid, the DO < 1+ > and DO < 1 > -terminals of the embedded controller 26 send control signals, the electric butterfly valve 5 is opened, the pressure in the tank and the atmospheric pressure are kept balanced, and the safety of the glass fiber reinforced plastic hydrochloric acid storage tank 1 is ensured. The positive and negative terminals of the static pressure liquid level meter 8 are respectively connected with In2+ and In2-terminals of the wiring terminal block 18 through the transmission cable 17, and the other ends of the In2+ and In2-terminals are respectively connected with AO2+ and AO 2-terminals of the embedded controller 26. When the glass fiber reinforced plastic hydrochloric acid storage tank 1 is fed with liquid, the static pressure liquid level meter 8 detects a liquid level value, converts the liquid level value into a liquid level signal of 4-20mA, and after the static pressure liquid level meter 8 detects that the liquid level value is higher than a set value, the touch screen 19 displays a liquid feeding stopping prompt, the DO < 1+ > and DO < 1 > -terminals of the embedded controller 26 send control signals, the electric butterfly valve 5 is closed, and liquid feeding control is completed.
The acid discharge pump 9 is connected to 3 terminals of the terminal block 18 through a control cable 23, the other ends of the 3 terminals are respectively connected to 3 terminals of the ac contactor 21 controlling the acid discharge pump, and the DO2+ and DO 2-terminals of the embedded controller 26 are respectively connected to coil terminals of the ac contactor 21 controlling the acid discharge pump. When the glass fiber reinforced plastic hydrochloric acid storage tank 1 discharges liquid, a touch screen 19 liquid discharge button is pressed, DO < 2+ > and DO < 2 > -terminals of the embedded controller 26 send control signals, a power supply of the acid discharge pump 9 is connected, liquid discharge starts, acid in the tank is discharged, meanwhile, the embedded controller 26 sends control signals through the DO < 1+ > and DO < 1 > -terminals, the signals are connected to positive and negative terminals of the electric butterfly valve 5 through the control cable 15 through AO < 1+ > and AO-terminals of the wiring terminal row 18, the electric butterfly valve 5 is opened, pressure in the tank and atmospheric pressure are kept balanced, and safety of the tank body is guaranteed. The action principle of the acid discharge end is opposite to the liquid discharge principle.
The power supply of the embedded controller 26 is in a 3-phase 4-wire mode, the power supply is connected in through a A, B, C, G terminal of the wiring terminal row 18, the A, B, C terminal is 3-phase alternating current, the G terminal is a grounding terminal, the input of the direct current power supply 20 is 220v, the output is 24v, and the direct current power supply is connected in the positive terminal and the negative terminal of the embedded controller 26 and the positive terminal of the touch screen 19 respectively to supply power for the embedded controller 26 and the touch screen 19.
The communication between the embedded controller 26 and the touch screen 19 adopts a MODBUS-RTU mode, and the signal connection is that the communication signal of the embedded controller 26 is respectively connected with the TA+ and TA-terminals of the touch screen 19 through TA+ and TA-.
The static pressure liquid level meter 8 is an EJA single flange static pressure liquid level meter of the cross river company.
The pressure transmitter 2 is an EJA diaphragm pressure transmitter of the company of the cross river.
Claims (2)
1. The automatic protection control device for the glass fiber reinforced plastic hydrochloric acid storage tank is characterized by comprising the glass fiber reinforced plastic hydrochloric acid storage tank (1), a pressure transmitter (2), a static pressure liquid level meter (8), an acid discharge pump (9), an absorption tower (10), an exhaust fan (13) and a control box (14); the control box (14) is provided with a wiring terminal block (18); the top of the glass fiber reinforced plastic hydrochloric acid storage tank (1) is provided with a pressure transmitter (2), a check valve (3), a stop valve (4) and an electric butterfly valve (5), positive and negative terminals of the pressure transmitter (2) are connected with the wiring terminal row (18) through a first transmission cable (16), the check valve (3) is connected with the lower part of the absorption tower (10) through a pipeline (6), the stop valve (4) is connected with a hydrochloric acid liquid inlet pipeline (7), and positive and negative terminals of the electric butterfly valve (5) are connected with the wiring terminal row (18) through a first control cable (15); the lower part of the glass fiber reinforced plastic hydrochloric acid storage tank (1) is provided with a static pressure liquid level meter (8) and a liquid outlet flange, the liquid outlet flange is connected with a bottom valve of the acid discharge pump (9) through a suction pipe and is positioned on the same horizontal plane, a liquid outlet of the acid discharge pump (9) is connected with a discharge pipe, a positive terminal and a negative terminal of the static pressure liquid level meter (8) and the acid discharge pump (9) are respectively connected with a wiring terminal row (18) through a second transmission cable (17) and a second control cable (23), and the electric butterfly valve (5) and the acid discharge pump (9) are controlled in an interlocking way; the exhaust fan (13) is communicated with the atmosphere through an exhaust pipeline (12) and is connected with the top of the absorption tower (10) and the wiring terminal row (18) through a pipeline and a third control cable (24) respectively; the absorption tower (10) is provided with an absorption liquid inlet pipeline (11).
2. The device according to claim 1, characterized in that the control box (14) is provided with a touch screen (19), a direct current power supply (20), an alternating current contactor (21) for controlling an acid discharge pump, an alternating current contactor (22) for controlling an exhaust fan, a 380v alternating current power supply (25) and an embedded controller (26), wherein the direct current power supply (20) is connected with the embedded controller (26) and the touch screen (19) in an input mode of 220v and an output mode of 24v respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810376275.3A CN108398968B (en) | 2018-04-25 | 2018-04-25 | Automatic protection control device for glass fiber reinforced plastic hydrochloric acid storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810376275.3A CN108398968B (en) | 2018-04-25 | 2018-04-25 | Automatic protection control device for glass fiber reinforced plastic hydrochloric acid storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108398968A CN108398968A (en) | 2018-08-14 |
| CN108398968B true CN108398968B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810376275.3A Active CN108398968B (en) | 2018-04-25 | 2018-04-25 | Automatic protection control device for glass fiber reinforced plastic hydrochloric acid storage tank |
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| Country | Link |
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| CN (1) | CN108398968B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020054402A (en) * | 2000-12-28 | 2002-07-08 | 이구택 | HCl concentration reducing apparatus by dehumidifing of exhausting gas of acid recycling plant |
| CN204522718U (en) * | 2015-03-04 | 2015-08-05 | 中国石油化工股份有限公司 | Hydrochloric acid tank hydrogen chloride tail gas treating apparatus |
| CN204522776U (en) * | 2015-03-17 | 2015-08-05 | 内蒙古君正化工有限责任公司 | A kind of remote auto pickling system |
| CN206969402U (en) * | 2017-05-31 | 2018-02-06 | 盘锦新恒兴化工有限公司 | Hydrochloric acid tank exhaust, anti-negative pressure and entrucking acid gas absorb control system |
| CN208335029U (en) * | 2018-04-25 | 2019-01-04 | 金川集团股份有限公司 | A kind of glass reinforced plastic hydrochloric acid tank automatic protecting control device |
-
2018
- 2018-04-25 CN CN201810376275.3A patent/CN108398968B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020054402A (en) * | 2000-12-28 | 2002-07-08 | 이구택 | HCl concentration reducing apparatus by dehumidifing of exhausting gas of acid recycling plant |
| CN204522718U (en) * | 2015-03-04 | 2015-08-05 | 中国石油化工股份有限公司 | Hydrochloric acid tank hydrogen chloride tail gas treating apparatus |
| CN204522776U (en) * | 2015-03-17 | 2015-08-05 | 内蒙古君正化工有限责任公司 | A kind of remote auto pickling system |
| CN206969402U (en) * | 2017-05-31 | 2018-02-06 | 盘锦新恒兴化工有限公司 | Hydrochloric acid tank exhaust, anti-negative pressure and entrucking acid gas absorb control system |
| CN208335029U (en) * | 2018-04-25 | 2019-01-04 | 金川集团股份有限公司 | A kind of glass reinforced plastic hydrochloric acid tank automatic protecting control device |
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| Publication number | Publication date |
|---|---|
| CN108398968A (en) | 2018-08-14 |
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