CN211371932U - Chemical agent adding device - Google Patents
Chemical agent adding device Download PDFInfo
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- CN211371932U CN211371932U CN201922398346.2U CN201922398346U CN211371932U CN 211371932 U CN211371932 U CN 211371932U CN 201922398346 U CN201922398346 U CN 201922398346U CN 211371932 U CN211371932 U CN 211371932U
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- pipeline
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Abstract
The utility model discloses a chemical agent adds device. One pipeline is connected to the top of the liquid storage tank through a liquid inlet pump; one pipeline enters the pipeline self-operated regulating valve group through the sealing gas and is connected to the top of the liquid storage tank; one pipeline extends out of the top of the liquid storage tank, the pipeline is divided into two paths, one path passes through a self-operated regulating valve group of a sealed gas discharge pipeline, the other path is provided with a safety valve, and the two paths of pipelines are finally converged into one path of pipeline and lead to the outside of the device; the tank bottom of the liquid storage tank extends out of a pipeline, the pipeline is sequentially connected with a mass flow meter and a micro flow regulating valve, and a tank body liquid level meter is arranged on the tank body of the liquid storage tank. When in use, the chemical agent is pressed out from the liquid storage tank. The utility model discloses a technical scheme safety, fault rate are low.
Description
Technical Field
The utility model belongs to the technical field of petrochemical, concretely relates to chemical agent adds device.
Background
In petrochemical processes, especially in oil refining processes, various chemical agents need to be added. In the prior art, chemical agents usually flow into a metering pump from an atmospheric storage tank, and then are pressurized and filled outwards through the metering pump. The chemical agent is required to firstly wait for flowing into the metering pump, so that the agent adding response is not sensitive enough; when the flow of the required medicament is small, the metering precision of the metering pump is not high, the control and adjustment of the micro flow are not accurate, in addition, the metering pump needs to be driven by a motor to operate, on one hand, the risk of motor damage exists, and on the other hand, certain energy sources need to be consumed; the normal pressure storage tank used in the prior art has certain potential safety hazard, and the normal pressure storage tank is difficult to inhibit the volatilization of chemical agents in the storage tank, and is difficult to find when leakage occurs.
Utility model patent with application number CN201620209521.2 discloses an intelligent sled dress carbon dioxide drives injection device. The device comprises a feeding pump, an injection pump, a flowmeter and an electric heater, wherein liquid carbon dioxide enters the feeding pump from a liquid carbon dioxide storage tank through an inlet of the feeding pump for pressurization, then enters a high-pressure carbon dioxide injection pump for pressurization again, and is heated and injected into each well mouth by the electromagnetic heater after being metered by the flowmeter. The scheme enables the filling process to be higher in automation degree, but the defects that in the prior art, the medicament adding response is not sensitive enough, the energy consumption of a motor pump is high, the failure rate is high and the like are not solved, the whole device is not beneficial to industrial production and transportation, drawings need to be contrasted during field installation, and the installation efficiency is lower.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the background art, the following are achieved: the utility model provides a device is added to chemical agent's purpose that "1 the filling process is safer, 2 avoid motor pump to damage, 3 little discharge filling is more accurate, 4 production transportation and on-the-spot simple to operate", the utility model provides a device is added to chemical agent.
A chemical agent adding device mainly comprises: the device comprises a liquid storage tank, a liquid inlet pump, a sealed gas inlet pipeline self-operated regulating valve group with a pressure taking point in front of a valve, a sealed gas discharge pipeline self-operated regulating valve group with a pressure taking point behind a valve, a safety valve, a mass flow meter, a micro flow regulating valve, PLC automatic control equipment and a tank body liquid level meter;
one pipeline is connected to the top of the liquid storage tank through a liquid inlet pump and is used for supplementing chemical agents into the liquid storage tank;
one pipeline enters the pipeline self-operated regulating valve group through the sealing gas and is finally connected to the tank top of the liquid storage tank, and the pipeline is used for supplementing the sealing gas into the liquid storage tank, namely supplementing pressure;
one pipeline is extended out of the top of the liquid storage tank and used for pressure relief and is divided into two paths, one path is self-operated through a sealed gas discharge pipeline, a safety valve is arranged on the other path, and the two paths of pipelines are finally converged into one path of pipeline and lead to the outside of the device; when the pressure in the liquid storage tank is overlarge and the self-operated adjusting valve group of the sealing gas discharge pipeline is difficult to discharge the pressure in the liquid storage tank, the pressure is discharged from the safety valve, so that the tank body of the liquid storage tank is prevented from being exploded and disassembled;
a pipeline extends out of the bottom of the liquid storage tank and is used for extruding chemical agents, a mass flow meter and a micro flow regulating valve are sequentially connected to the pipeline, and the mass flow meter controls the micro flow regulating valve through PLC automatic control equipment;
a tank body liquid level meter is arranged on the tank body of the liquid storage tank.
Furthermore, the liquid inlet pump is a pneumatic liquid booster pump.
Furthermore, the upper part and the lower part of the liquid storage tank are respectively provided with a liquid level alarm device; the pipeline provided with the liquid inlet pump is also provided with an adjusting valve; the liquid level alarm device controls the liquid inlet pump and the regulating valve through the PLC automatic control equipment, the two liquid level alarm devices respectively correspond to the liquid level high reporting value and the liquid level low reporting value of the liquid storage tank, and then trigger a program, when triggering the liquid level low reporting value, all valves on the pipeline of the liquid inlet pump are automatically opened, then the liquid inlet pump is started, when triggering the liquid level high reporting value, the liquid inlet pump is automatically stopped, and finally the valves on the pipeline of the liquid inlet pump 2 are closed.
Furthermore, the liquid storage tank and the PLC automatic control equipment are installed and fixed in the skid-mounted base section steel framework through the supporting frames, and meanwhile, the auxiliary equipment of the liquid storage tank and the PLC automatic control equipment, including pipelines and the like, is installed and finished in a matched mode during factory production.
Wherein, still be equipped with the check valve after sealed gas gets into pipeline formula governing valve group of relying on oneself, also be equipped with the check valve before the mass flowmeter, the use of check valve can guarantee that the commodity circulation is carried according to the design route.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the storage tank of the chemical agent is changed from a traditional normal pressure tank into a high pressure tank, so that the chemical agent is more difficult to volatilize on one hand, and on the other hand, the high pressure tank is easier to find than the normal pressure tank when the micro leakage condition occurs, and the safe production is facilitated;
2. the whole device is not provided with a pump driven by a motor, so that the risk of motor damage is avoided, and the energy consumption is reduced;
3. the mass flow meter, the micro flow regulating valve and the PLC automatic control equipment are matched, so that the filling is more accurate than a metering pump particularly when a small-flow chemical agent is filled.
4. The nitrogen-sealed pressure liquid storage tank and the PLC automatic control box are both installed and fixed in a skid-mounted base section steel frame through a support frame, and the modularized design is beneficial to industrial manufacturing and long-distance transportation and is convenient for field installation.
Drawings
FIG. 1: a schematic view of a chemical dosing apparatus;
in the figure: 1. the device comprises a liquid storage tank, 2, a liquid inlet pump, 3, a self-operated adjusting valve group of a sealing gas inlet pipeline, 4, a self-operated adjusting valve group of a sealing gas discharge pipeline, 5, a safety valve, 6, a mass flow meter, 7, a micro flow adjusting valve, 8, a PLC automatic control device, 9, a tank body liquid level meter and 10, a liquid level alarm device.
Detailed Description
To the utility model discloses explain, but not to the restriction of the utility model discloses a technical scheme that obtains under the thinking inspiration of the utility model all should be brought into the protection category of the utility model patent.
Example one
As shown in fig. 1, a chemical adding apparatus: the main equipment comprises: the device comprises a liquid storage tank 1, a liquid inlet pump 2, a sealed gas inlet pipeline self-operated regulating valve group 3 with a pressure taking point in front of a valve, a sealed gas discharge pipeline self-operated regulating valve group 4 with a pressure taking point behind a valve, a safety valve 5, a mass flowmeter 6, a micro flow regulating valve 7, a PLC automatic control device 8 and a tank body liquid level meter 9; more specifically, the liquid inlet pump 2 used is a pneumatic liquid booster pump; the liquid storage tank 1 and the PLC automatic control equipment 8 are both installed and fixed in a skid-mounted base steel framework through a support frame, and related pipelines and instruments surround the liquid storage tank 1 and the PLC automatic control equipment 8 and are pre-installed, so that the production and the transportation are convenient, and the field installation is also convenient; the setting pressure of the seal gas inlet pipeline self-operated adjusting valve group 3 and the seal gas discharge pipeline self-operated adjusting valve group 4 is 1.5 MPa.
One pipeline passes through the liquid inlet pump 2 and is finally connected to the top of the liquid storage tank 1;
one pipeline enters a pipeline self-operated adjusting valve group 3 through sealing gas and is finally connected to the top of the liquid storage tank 1;
a pipeline extends out of the top of the liquid storage tank 1 and is divided into two paths, one path passes through a sealed gas discharge pipeline self-operated regulating valve group 4, the other path is provided with a safety valve 5, and the two paths of pipelines are finally converged into one path of pipeline and lead to the outside of the device;
a pipeline extends out of the bottom of the liquid storage tank 1, the pipeline is sequentially connected with a mass flow meter 6 and a micro flow regulating valve 7, and the mass flow meter 6 controls the micro flow regulating valve 7 through a PLC automatic control device 8;
a tank body liquid level meter 9 is arranged on the tank body of the liquid storage tank 1, and liquid level alarm devices 10 are respectively arranged at the upper part and the lower part of the liquid storage tank 1; the pipeline provided with the liquid inlet pump 2 is also provided with an adjusting valve; the liquid level alarm device 10 controls the liquid inlet pump 2 and the regulating valve through the PLC automatic control equipment 8, when the liquid level of the liquid level alarm device 10 is triggered to be low, all valves on the pipeline of the liquid inlet pump 2 are automatically opened, then the liquid inlet pump 2 is started, when the liquid level is triggered to be high, the liquid inlet pump 2 is automatically stopped, and finally the valves on the pipeline of the liquid inlet pump 2 are closed.
In actual use, when chemical agents need to be pressed out, the chemical agents are pressed out through the mass flow meter 6 and the micro flow control valve 7 by high pressure in the liquid storage tank 1, the mass flow meter 6 detects the current chemical agent flow in real time, the value is transmitted to the PLC automatic control equipment 8, and the micro flow control valve 7 is controlled by the PLC automatic control equipment 8 to adjust the real-time flow.
When the pressure in the liquid storage tank 1 is insufficient, namely lower than 1.5MPa, constant-pressure nitrogen from public works enters the pipeline self-operated regulating valve group 3 through sealing gas to automatically supplement high-pressure nitrogen into the liquid storage tank 1, the sealing gas discharge pipeline self-operated regulating valve group 4 has the function of releasing the pressure outwards when the pressure in the liquid storage tank 1 is higher than a set value of 1.5MPa, and when the pressure in the liquid storage tank 1 is too high, the sealing gas discharge pipeline self-operated regulating valve group 4 is difficult to release the pressure safely, the safety valve 5 releases the pressure, so that the liquid storage tank 1 is prevented from being exploded and disassembled.
Claims (4)
1. A chemical dosing device: the method is characterized in that: the main equipment comprises: the device comprises a liquid storage tank (1), a liquid inlet pump (2), a sealed gas inlet pipeline self-operated adjusting valve group (3) with a pressure taking point in front of a valve, a sealed gas discharge pipeline self-operated adjusting valve group (4) with a pressure taking point behind the valve, a safety valve (5), a mass flow meter (6), a micro flow control valve (7), a PLC automatic control device (8) and a tank body liquid level meter (9);
the liquid inlet pump (2) is connected to the tank top of the liquid storage tank (1) through a pipeline;
the pipeline of the sealed air inlet pipeline self-operated adjusting valve group (3) is connected to the top of the liquid storage tank (1);
a pipeline is extended out of the top of the liquid storage tank (1), the pipeline is divided into two paths, one path passes through a self-operated adjusting valve group (4) of a sealed gas discharge pipeline, the other path is provided with a safety valve (5), and the two paths of pipelines are finally converged and led out of the device;
a pipeline extending out of the bottom of the liquid storage tank (1) is sequentially connected with a mass flow meter (6) and a micro flow regulating valve (7), and the mass flow meter (6) controls the micro flow regulating valve (7) through a PLC automatic control device (8);
a tank body liquid level meter (9) is arranged on the tank body of the liquid storage tank (1).
2. A chemical dosing device as claimed in claim 1, wherein: the liquid inlet pump (2) is a pneumatic liquid booster pump.
3. A chemical dosing device as claimed in claim 1, wherein: the upper part and the lower part of the liquid storage tank (1) are respectively provided with a liquid level alarm device (10); the pipeline provided with the liquid inlet pump (2) is also provided with an adjusting valve; the liquid level alarm device (10) controls the liquid inlet pump (2) and the regulating valve through the PLC automatic control equipment (8).
4. A chemical dosing device as claimed in claim 1, wherein: the liquid storage tank (1) and the PLC automatic control equipment (8) are both installed and fixed in a skid-mounted base section steel frame through a support frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922398346.2U CN211371932U (en) | 2019-12-27 | 2019-12-27 | Chemical agent adding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922398346.2U CN211371932U (en) | 2019-12-27 | 2019-12-27 | Chemical agent adding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211371932U true CN211371932U (en) | 2020-08-28 |
Family
ID=72152045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922398346.2U Active CN211371932U (en) | 2019-12-27 | 2019-12-27 | Chemical agent adding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211371932U (en) |
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2019
- 2019-12-27 CN CN201922398346.2U patent/CN211371932U/en active Active
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