CN210825403U - Automatic loading system of concentrated sulfuric acid - Google Patents
Automatic loading system of concentrated sulfuric acid Download PDFInfo
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- CN210825403U CN210825403U CN201921816604.8U CN201921816604U CN210825403U CN 210825403 U CN210825403 U CN 210825403U CN 201921816604 U CN201921816604 U CN 201921816604U CN 210825403 U CN210825403 U CN 210825403U
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Abstract
The utility model discloses an automatic loading system for concentrated sulfuric acid, which comprises a fuming acid storage tank, an automatic cut-off valve, an electromagnetic flowmeter, a PLC (programmable logic controller), a touch screen, an overflow prevention controller, an acid loading arm and an acid loading tank car; the fuming sulfuric acid outlet of the fuming acid storage tank, the automatic cut-off valve and the acid loading arm are sequentially communicated with one another through an acid loading pipeline, and the electromagnetic flowmeter is connected with the acid loading pipeline; the acid filling riser is communicated with a fuming sulfuric acid inlet of the acid filling tank car; a liquid level detection probe is arranged at the end part communicated with the fuming sulfuric acid inlet of the acid loading crane pipe and the acid loading tank car; touch-sensitive screen, electromagnetic flowmeter, automatic cutout valve and anti-overflow flow controller all with PLC controller electric connection, liquid level detection probe with anti-overflow flow controller electric connection. Through the utility model discloses, can effectively restrict and send out nicotinic acid overload transportation, reduce workman's operation risk, promote automatic control level, reduce the safety risk and the environmental protection risk that send out nicotinic acid to leak.
Description
Technical Field
The utility model relates to a concentrated sulfuric acid loading technical field, concretely relates to automatic loading system of concentrated sulfuric acid.
Background
The oleum refers to sulfuric acid with concentration of more than or equal to 104.5%, and the main component of the flue gas is sulfur trioxide, which has strong corrosivity and irritation, can cause burn of human body, has strong irritation and corrosion effects on skin, mucosa and other tissues, and can cause larynx spasm or glottic edema to die. Therefore, the loading device of the fuming sulfuric acid has higher safety requirements, including safe and reliable leakage prevention measures, emergency stopping measures and the like. The existing fuming sulfuric acid is loaded by mainly utilizing the terrain drop between an acid tank and a loading point when the existing fuming sulfuric acid is loaded, and the fuming sulfuric acid is loaded by an acid conveying pipeline through a manual stop valve, a pneumatic stop valve, an acid loading arm and an anti-overflow device.
The problem that current loading device exists is: 1. dangerous chemicals transportation forbids overload strictly, and the overflow prevention device equipped at present has the liquid level detection point which is high or low and cannot be adjusted freely, and cannot be used for controlling the filling amount of a tank car. And because the fuming acid fog is thick, the anti-overflow detection probe has factors such as misinformation, and the like, the automatic control loading can not be realized, and only the safety function can be realized. 2. When the tank truck is filled, the sulfuric acid liquid level of the loaded tank truck is checked manually to control the acid loading amount, the labor intensity of workers is high, and the existing safety risk is high; 3. the number of charging vehicles can not be automatically recorded, and data such as the weight of the nicotinic acid for loading, selling and selling can not be known in time.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an automatic loading system of concentrated sulfuric acid, can effectively prevent to send out nicotinic acid overload transportation, reduce workman's operation risk, promote automatic control level, reduce the safety risk and the environmental protection risk that send out nicotinic acid and leak.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an automatic concentrated sulfuric acid loading system comprises a fuming acid storage tank, an automatic cut-off valve, an electromagnetic flow meter, a PLC (programmable logic controller), a touch screen, an overflow prevention controller, an acid loading arm and an acid loading tank car; the fuming sulfuric acid outlet of the fuming acid storage tank, the automatic cut-off valve and the acid loading arm are sequentially communicated with one another through an acid loading pipeline, and the electromagnetic flowmeter is connected with the acid loading pipeline; the acid filling riser is communicated with a fuming sulfuric acid inlet of the acid filling tank car; a liquid level detection probe is arranged at the end part communicated with the fuming sulfuric acid inlet of the acid loading crane pipe and the acid loading tank car; touch-sensitive screen, electromagnetic flowmeter, automatic cutout valve and anti-overflow flow controller all with PLC controller electric connection, liquid level detection probe with anti-overflow flow controller electric connection.
Further, the system also comprises a manual cut-off valve which is respectively communicated with a fuming sulfuric acid outlet of the fuming acid storage tank and an automatic cut-off valve through an acid loading pipeline.
Further, the system also comprises an intermediate relay, and the PLC controller is electrically connected to the automatic cut-off valve through the intermediate relay.
Further, a fuming sulfuric acid outlet of the fuming acid storage tank is positioned at a position close to the bottom of one side of the fuming acid storage tank, and the position of the acid containing tank car is lower than that of the fuming sulfuric acid outlet of the fuming acid storage tank.
The beneficial effects of the utility model reside in that: through the utility model discloses, can effectively restrict and send out nicotinic acid overload transportation, reduce workman's operation risk, promote automatic control level, reduce the safety risk and the environmental protection risk that send out nicotinic acid to leak.
Drawings
Fig. 1 is a schematic structural view of an automatic loading system of concentrated sulfuric acid in embodiment 1 of the present invention;
fig. 2 is a block diagram of a control principle of a concentrated sulfuric acid automatic loading system in embodiment 1 of the present invention;
fig. 3 is a flowchart of the working process of the concentrated sulfuric acid automatic loading system in embodiment 2 of the present invention;
fig. 4 is a schematic diagram of a control circuit of the concentrated sulfuric acid automatic loading system in embodiment 2 of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the present embodiment.
Example 1
The embodiment provides an automatic loading system of concentrated sulfuric acid, which comprises a fuming acid storage tank 1, an automatic cut-off valve 3, an electromagnetic flowmeter 7, a PLC (programmable logic controller) 8, a touch screen 9, an overflow prevention controller 4, an acid loading arm 6 and an acid loading tank car 5, as shown in fig. 1-2; the fuming sulfuric acid outlet of the fuming acid storage tank 1, the automatic cut-off valve 3 and the acid loading arm 6 are communicated in sequence through an acid loading pipeline, and the electromagnetic flowmeter 7 is connected with the acid loading pipeline; the acid filling riser 6 is communicated with a fuming sulfuric acid inlet of the acid filling tank car 5; a liquid level detection probe 10 is arranged at the end part communicated with the fuming sulfuric acid inlet of the acid loading crane pipe 6 and the acid loading tank car 5; touch-sensitive screen 9, electromagnetic flowmeter 7, automatic cutout valve 3 and anti-overflow controller 4 all with 8 electric connection of PLC controller, liquid level detection probe 10 with anti-overflow controller 4 electric connection.
The working process of the concentrated sulfuric acid automatic loading system is as follows: when fuming sulfuric acid loading is required, the PLC 8 is started, and loading related control parameters (including loading acid amount and the like) are set on the touch screen 9. The PLC controller 8 controls the electromagnetic flowmeter 7, the automatic cut-off valve 3 and the overflow prevention controller 4 to be started, and the automatic cut-off valve 3 is opened and sends a switch signal which is in place to the PLC controller 8. Fuming sulfuric acid flows through the fuming sulfuric acid outlet of the fuming sulfuric acid storage tank 1 through the acid loading pipeline, sequentially flows through the automatic cut-off valve 2 and the acid loading arm 6, and finally flows into the acid loading tank truck 5 through the acid loading arm 6.
In the process of flowing fuming sulfuric acid, the electromagnetic flowmeter 7 continuously detects the flow of fuming sulfuric acid and transmits the flow to the PLC 8 in the form of pulse and current signals. The PLC controller 8 receives and processes the flow signal transmitted by the electromagnetic flowmeter 7, the pulse signal enters a counter of the PLC controller 8 for counting, and the current signal is displayed on the touch screen 9 after operation processing. When the flow of fuming sulfuric acid reaches a preset upper limit value, the PLC controller 8 controls the automatic cut-off valve 3 to be closed, and the automatic cut-off valve 3 sends a switch signal of closing the valve to the PLC controller 8.
When the liquid level detection probe 10 at the end of the acid filling riser 6 detects that the fuming sulfuric acid amount reaches the position of the liquid level detection probe, the liquid level detection probe 10 sends an overflow signal (switching value) to the overflow prevention controller 4, the overflow prevention controller 4 sends an alarm (for example, sends an alarm sound) by itself, and further sends the overflow signal to the PLC controller 8, and the PLC controller 8 controls the automatic cut-off valve 3 to be closed to prevent the overflow and record alarm information.
In the embodiment, the system further comprises a manual cut-off valve 2, and the manual cut-off valve 2 is respectively communicated with the fuming sulfuric acid outlet of the fuming acid storage tank 1 and the automatic cut-off valve 3 through an acid loading pipeline. The manual cut-off valve 2 can be used as an emergency valve, and the condition that the PLC controller 8 or the automatic cut-off valve 3 cannot cut off when in fault is prevented. When the manual cut-off valve is used under the normal condition, the manual cut-off valve is set to be in a normally open state.
In this embodiment, the system further includes an intermediate relay 11, and the PLC controller 8 is electrically connected to the automatic shutoff valve 3 through the intermediate relay 11.
In the embodiment, the fuming sulfuric acid outlet of the fuming acid storage tank 1 is positioned at a position close to the bottom of one side of the fuming acid storage tank 1, and the acid containing tank car 5 is positioned lower than the fuming sulfuric acid outlet of the fuming acid storage tank 1. The fuming sulfuric acid in the fuming acid storage tank automatically flows into the acid tank truck through the pressure generated by the liquid level difference.
Example 2
This embodiment provides a more specific embodiment based on embodiment 1.
3-4, starting the PLC controller, controlling the automatic cut-off valve, the overflow prevention controller and the electromagnetic flowmeter to start, opening the automatic cut-off valve, and sending a switch signal which is in place to the PLC controller. And after time delay, the PLC does not receive a switch signal of the automatic cut-off valve, so that fault alarm is carried out, and the automatic cut-off valve is controlled to be closed to stop loading.
The concentrated sulfuric acid automatic loading system adopts an electromagnetic flowmeter as a detection device for the nicotinic acid charging flow, and the accumulated flow is transmitted to a high-speed counting terminal I0.0 of a PLC (programmable logic controller) in a pulse mode; the instantaneous flow signal is converted into a voltage signal of 2-10V in the form of 4-20mA current through a 500 omega resistor and transmitted to an AIW0 port of the PLC.
The PLC controller receives and processes flow signals transmitted by the electromagnetic flowmeter, wherein pulse signals enter the counter for counting, and when the count value of the counter reaches a preset loading amount, the PLC controller closes the automatic cut-off valve by controlling the intermediate relay, so that loading is completed. The instantaneous flow signal is used for displaying the instantaneous flow on the touch screen after the A/D conversion and the operation processing of the PLC.
The touch screen is in communication connection with a serial port of the PLC, and control parameters and operation instructions which need to be set or adjusted when acid is contained are input by the touch screen and are transmitted to the PLC for processing. The PLC transmits data such as flow to the touch screen for displaying, and records and archives operation data, data such as flow and the like.
After the preset loading amount is reached, the automatic cut-off valve closes the valve under the control of the PLC, a switch signal of closing the valve in place is sent to the PLC, after time delay, if the PLC does not receive the switch signal of closing the automatic cut-off valve in place, an alarm is given, and operators adopt the manual cut-off valve to cut off the valve forcibly.
In the loading process, in order to further prevent the excessive loading, the liquid level detection probe detects the liquid flow in the acid loading tank car in real time. When the amount of fuming sulfuric acid reaches the position of the liquid detection probe, the liquid detection probe sends an overflow signal (switching value) to the overflow prevention controller, after the overflow prevention controller detects the overflow signal (switching value), the overflow prevention controller gives an alarm by itself and transmits the overflow signal to the PLC, and the PLC controls the automatic cut-off valve to be closed and carries out alarm recording.
Before starting to charge acid, inputting a value of 'acid charging set quantity' on site; resetting the acid-filling quantity-counting number by pressing a reset button of the touch screen; when the button SB1 is pressed, the intermediate relay KA1 is closed, the automatic cut-off valve is opened, and acid filling is started. When the PLC counts and adorns sour setting amount, PLC controller outage auxiliary relay KA1, the automatic cutout valve is closed, and the dress is sour to be accomplished, presses SB2 button and can stop adorning sour at any time. The emergency stop switch SA is arranged, and under special conditions, the automatic cut-off valve is directly closed without passing through a PLC (programmable logic controller), the loading operation is stopped, and an alarm is given.
Various corresponding changes and modifications can be made by those skilled in the art according to the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (4)
1. An automatic concentrated sulfuric acid loading system is characterized by comprising a fuming acid storage tank (1), an automatic cut-off valve (3), an electromagnetic flow meter (7), a PLC (programmable logic controller) controller (8), a touch screen (9), an anti-overflow controller (4), an acid loading arm (6) and an acid loading tank car (5); the fuming sulfuric acid outlet of the fuming sulfuric acid storage tank (1), the automatic cut-off valve (3) and the acid loading arm (6) are sequentially communicated with one another through an acid loading pipeline, and the electromagnetic flowmeter (7) is connected with the acid loading pipeline; the acid loading crane pipe (6) is communicated with a fuming sulfuric acid inlet of the acid loading tank car (5); a liquid level detection probe (10) is arranged at the end part communicated with the fuming sulfuric acid inlet of the acid loading crane pipe (6) and the acid loading tank car (5); touch-sensitive screen (9), electromagnetic flowmeter (7), automatic cutout valve (3) and anti-overflow controller (4) all with PLC controller (8) electric connection, liquid level detection probe (10) with anti-overflow controller (4) electric connection.
2. The automatic concentrated sulfuric acid loading system according to claim 1, further comprising a manual cut-off valve (2), wherein the manual cut-off valve is respectively communicated with the fuming sulfuric acid outlet of the fuming sulfuric acid storage tank (1) and the automatic cut-off valve (3) through an acid loading pipeline.
3. The automatic concentrated sulfuric acid loading system according to claim 1, further comprising an intermediate relay (11), wherein the PLC (8) is electrically connected to the automatic shut-off valve (3) through the intermediate relay (11).
4. The concentrated sulfuric acid automatic loading system of claim 1, wherein the fuming sulfuric acid outlet of the fuming acid storage tank (1) is positioned at a position close to the bottom of one side of the fuming acid storage tank (1), and the acid loading tank car (5) is positioned lower than the fuming sulfuric acid outlet of the fuming acid storage tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921816604.8U CN210825403U (en) | 2019-10-28 | 2019-10-28 | Automatic loading system of concentrated sulfuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921816604.8U CN210825403U (en) | 2019-10-28 | 2019-10-28 | Automatic loading system of concentrated sulfuric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210825403U true CN210825403U (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921816604.8U Active CN210825403U (en) | 2019-10-28 | 2019-10-28 | Automatic loading system of concentrated sulfuric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210825403U (en) |
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2019
- 2019-10-28 CN CN201921816604.8U patent/CN210825403U/en active Active
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