CN213314895U - An automatic liquid pouring buffer kettle system - Google Patents

Abstract

The utility model provides an automatic buffering cauldron system of falling liquid includes one-level buffering cauldron and second grade buffering cauldron and PLC controller, one-level buffering cauldron passes through one-level drain line and is connected with second grade buffering cauldron, be provided with the two-way valve on the one-level drain line, one-level buffering cauldron passes through vacuum tube and intake pipe respectively with the vacuum pump, reation kettle connects, be provided with first level sensor and second level sensor in the second grade buffering cauldron, still be provided with the second breather pipe on the second grade buffering cauldron, be provided with the second breather valve on it, the leakage fluid dram of second grade buffering cauldron bottom connects the second grade drain line, be provided with the check valve on it, the two-way valve, first breather valve, the second breather valve, first level sensor, the equal PLC controller of second level sensor and check valve is connected. The utility model discloses a two buffering cauldron series connection settings, the organic liquid of condensation in the one-level buffering cauldron get into second grade buffering cauldron in succession in the back, reach automatic discharge behind the liquid level standard, whole process is automatic in succession and is fallen liquid, improves production efficiency.

Description

Automatic buffer kettle system of pouring liquid

Technical Field

The utility model relates to an automatic buffer tank system of falling liquid belongs to chemical production technical field.

Background

When a water pump or an oil pump is adopted for air exhaust and pressure reduction, a buffer system is added between a vacuum pump and a reaction kettle, and when the pressure of the water pump is reduced, water is sucked back into the buffer system to avoid entering the reaction system; the organic steam brought out by the vacuum pump is liquefied through a buffer system, so that the organic steam is prevented from being discharged to the environment through a water pump or entering an oil pump to damage the oil pump; however, the above buffer systems have the following disadvantages: a stable cooling system is lacked, and organic vapor which is not liquefied enters a pump; for certain reactions requiring long time, particularly when organic solvents are evaporated under reduced pressure, a large amount of organic solvents enter the buffer kettle, the buffer kettle needs to be checked manually at regular time, if the liquid in the buffer kettle is not poured in time due to negligence, the liquid in the kettle is easy to be pumped into a vacuum pump through a vacuum pipeline to cause damage to the vacuum pump, and the liquefied organic matters are discharged outwards to cause environmental pollution; the vacuum pump needs to be closed before liquid is poured, the production condition is changed, after the liquid is poured, the vacuum is turned on again, the vacuum degree is adjusted, the production condition is stabilized, the production efficiency and the production authenticity are reduced, and the labor cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art drawback, provide an automatic buffer kettle system of falling liquid, adopt two buffer kettle series connection settings, the organic liquid of condensation in the one-level buffer kettle gets into in the second grade buffer kettle back in succession, reaches automatic discharge behind the liquid level standard, and whole process is automatic going on in succession, effectively prevents liquid suck-back, improves production efficiency, practices thrift the cost of labor.

The utility model provides a technical scheme that its technical problem adopted is:

a buffer kettle system capable of automatically pouring liquid comprises a first-stage buffer kettle, a second-stage buffer kettle and a PLC (programmable logic controller), wherein the first-stage buffer kettle, the second-stage buffer kettle and the PLC are arranged in series, the bottom of the first-stage buffer kettle is connected with the middle of the second-stage buffer kettle through a first-stage liquid drainage pipeline, a two-way valve is arranged on the first-stage liquid drainage pipeline, a vacuumizing pipe and an air inlet pipe are arranged on the first-stage buffer kettle, the vacuumizing pipe and the air inlet pipe are respectively connected with a vacuum pump and a reaction kettle, a first liquid level sensor and a second liquid level sensor are arranged in the second-stage buffer kettle, the first liquid level sensor is positioned at the bottom of the second-stage buffer kettle and above a liquid drainage port, the second liquid level sensor is positioned in the middle of the second-stage buffer kettle and not higher than a liquid inlet, a second vent pipe is also arranged on the second-stage buffer, and the two-stage liquid drainage pipeline is provided with a one-way valve, and the two-way valve, the first vent valve, the second vent valve, the first liquid level sensor, the second liquid level sensor and the one-way valve are all connected with the PLC.

Above-mentioned automatic buffer kettle system of falling liquid, one-level buffer kettle and second grade buffer kettle are double-deck buffer kettle, are provided with condensate import and liquid outlet on its outer wall, and it is connected with condensation circulation system through condensation duct.

According to the automatic liquid pouring buffer kettle system, the first-stage buffer kettle is further provided with the first vent pipe, and the first vent pipe is provided with the first vent valve.

In the above automatic liquid pouring buffer kettle system, the bottom of the first-stage buffer kettle is higher than the middle position of the second-stage buffer kettle or the two are on the same horizontal plane.

The utility model has the advantages that: the utility model discloses an one-level buffering cauldron and second grade buffering cauldron series connection set up, connect through the one-level fluid-discharge tube between the two, set up the two-way valve on it, organic steam and vapor of distillation in the reation kettle get into in the one-level buffering cauldron under the effect of negative pressure, and in condensing into discharging into second grade buffering cauldron through first fluid-discharge tube after the liquid in, first level sensor and second sensor in the second grade buffering cauldron are connected with the PLC controller respectively, through the liquid level signal, opening and close of PLC controller control two-way valve and check valve, realize timely automatic collection and the discharge of liquid after the condensation, effectively prevent the emergence of suck-back phenomenon, whole automatic collection and the discharge of distilled gas, need not to shut down artifical liquid, and the production efficiency is improved, and the human cost is saved.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a schematic view of the overall structure of the device of the present invention.

In the figure: 1. a first-stage buffer kettle; 2. a secondary buffer kettle; 3. a PLC controller; 4. a primary liquid discharge pipe; 5. a two-way valve; 6. vacuumizing a tube; 7. an air inlet pipe; 8. a first vent pipe; 9. a first vent valve; 10. a first liquid level sensor; 11. a second liquid level sensor; 12. a second vent pipe; 13. a second vent valve; 14. a secondary liquid discharge pipe; 15. a one-way valve.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1, the utility model relates to an automatic liquid pouring buffer kettle system, which comprises a first-stage buffer kettle 1, a second-stage buffer kettle 2 and a PLC controller 3, which are connected in series, wherein the bottom of the first-stage buffer kettle 1 is connected with the middle of the second-stage buffer kettle 2 through a first-stage liquid discharge pipeline 4, the bottom of the first-stage buffer kettle 1 is higher than the middle of the second-stage buffer kettle 2 or the two are on the same horizontal plane, so as to ensure that the liquid in the first-stage buffer kettle automatically flows into the second-stage reaction kettle, a two-way valve 5 is arranged on the first-stage liquid discharge pipeline 4, a vacuum tube 6, an air inlet tube 7 and a first air vent pipe 8 are arranged on the first-stage buffer kettle 1, the vacuum tube 6 and the air inlet tube 7 are respectively connected with a vacuum pump and the reaction kettle, a first air vent valve 9 is arranged on the first air vent pipe 8, first level sensor 10 is located at the bottom of the cauldron of second grade buffering cauldron, and be located the leakage fluid dram top, second level sensor 11 is located the middle part of second grade buffering cauldron, is not higher than the position of inlet, still be provided with second breather pipe 12 on the second grade buffering cauldron, be provided with second breather valve 13 on it, the leakage fluid dram of 2 bottoms of second grade buffering cauldron passes through second grade drainage pipe 14 and is connected with the liquid collection jar, be provided with check valve 15 on the second grade drainage pipe 14, two-way valve 5, first breather valve 9, second breather valve 13, first level sensor 10, second level sensor 11 and check valve 15 are all PLC controller 3 connects.

The first-stage buffer kettle 1 and the second-stage buffer kettle 2 are double-layer buffer kettles, a condensate inlet and a condensate outlet are formed in the outer walls of the double-layer buffer kettles, the condensate inlet and the condensate outlet are connected with a condensation circulating system through a condensation pipeline, and the condensate circularly enters the space between double-layer walls of the double-layer buffer kettles to realize condensation of distilled gas.

The working process is as follows: a. when the reduced pressure distillation is carried out, the two-way valve 5, the vacuumizing pipe 6 and the air inlet pipe 7 are all in an open state, and are in a closed state with the valve. The vacuum pump passes through the air in vacuum tube 6 suction one-level buffer kettle 1 and the second grade buffer kettle 2, form the negative pressure in making the cauldron, and one-level buffer kettle passes through intake pipe 7 and reation kettle intercommunication, make reation kettle and buffer kettle form stable negative pressure system, along with going on of evacuation, the interior distillative organic steam of reation kettle passes through intake pipe 7 and gets into in the one-level buffer kettle, under condensation circulation system's effect, the condensed liquification is liquid, and drip to in the one-level buffer kettle 1, organic liquid increases gradually and gets into in second grade buffer kettle 2 through one-level drain pipe 4.

b. When second level sensor 11 in second grade buffer kettle 2 detects the liquid level signal, it is with signal transmission to PLC controller 3, after the PLC controller received the liquid level signal (the signal of receiving is the same with the settlement signal), automatic control closes two-way valve 5, send the close signal after two-way valve 5 thoroughly closed, after PLC controller 3 received the signal, control slowly opens second breather valve 13, make the pressure in second grade buffer tank 2 equal gradually with the external world, at this moment, PLC controller control opens check valve 15, make the automatic discharge of organic liquid in second grade buffer kettle 2 to the liquid collecting tank in, need not the parking people hand and outwards fall liquid.

c. When the liquid level in the secondary buffer tank 2 is gradually reduced to the liquid level height monitored by the first liquid level sensor 10, the first liquid level sensor sends a signal to the PLC, the PLC receives the signal and then controls the closing of the second vent valve 13 and the one-way valve 15, when the two valves are completely closed, the PLC receives the signal and automatically and slowly opens the two-way valve 5, and the system continues to repeat the step a to collect the liquid.

d. If automation equipment breaks down, the liquid level in the first-level buffer kettle 1 continuously rises, at the moment, the vacuum pumping pipe 6 is closed, the first control valve 9 is manually opened, the whole system is decompressed, and the whole system is gradually equal to the external pressure, so that the liquid is smoothly discharged and the equipment is overhauled.

Claims (4)

1. a kind of buffer kettle system of automatic liquid pouring, is characterized in that: described system comprises one-stage buffer still (1) and secondary buffer still (2) and PLC controller (3) that are arranged in series, described one-stage buffer still (3), The bottom of the buffer kettle (1) is connected with the middle of the secondary buffer kettle (2) through the primary liquid discharge pipeline (4), and the primary liquid discharge pipeline (4) is provided with a two-way valve (5), so The first-stage buffer kettle (1) is provided with an evacuation pipe (6) and an air inlet pipe (7), and the evacuation pipe (6) and the air inlet pipe (7) are respectively connected with a vacuum pump and a reaction kettle, and the second stage buffer kettle (2) A first liquid level sensor (10) and a second liquid level sensor (11) are provided inside, and the first liquid level sensor (10) is located at the bottom of the secondary buffer kettle and at the liquid discharge port Above, the second liquid level sensor (11) is located in the middle of the secondary buffer kettle, not higher than the position of the liquid inlet, the secondary buffer kettle is also provided with a second ventilation pipe (12), which is provided with There is a second ventilation valve (13), and the liquid discharge port at the bottom of the secondary buffer kettle (2) is connected to the liquid collection tank through a secondary liquid discharge pipeline (14), and the secondary liquid discharge pipeline (14) is provided with There is a one-way valve (15), the two-way valve (5), a first vent valve (9), a second vent valve (13), a first liquid level sensor (10), a second liquid level sensor (11) and The one-way valve (15) is connected to the PLC controller (3). 2. the buffer still system of automatic liquid pouring according to claim 1, is characterized in that: described first-level buffer still (1) and secondary buffer still (2) are double-layer buffer stills, and its outer wall is provided with The condensate inlet and outlet are connected with the condensate circulation system through the condensate pipeline. 3. The buffer kettle system of automatic liquid pouring according to claim 2, characterized in that: a first ventilation pipe (8) is also provided on the first-stage buffer kettle (1), and the first ventilation pipe (8) A first ventilation valve (9) is provided on the upper part. 4. The buffer still system of automatic liquid pouring according to claim 3 is characterized in that: the bottom of the first-stage buffer still (1) is higher than the middle position of the second-stage buffer still (2) or both are at on the same level.

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