CN211098930U - Quantitative dripping device for liquid material - Google Patents
Quantitative dripping device for liquid material Download PDFInfo
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- CN211098930U CN211098930U CN201921251250.7U CN201921251250U CN211098930U CN 211098930 U CN211098930 U CN 211098930U CN 201921251250 U CN201921251250 U CN 201921251250U CN 211098930 U CN211098930 U CN 211098930U
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Abstract
The utility model discloses a liquid material quantitative dripping device, which comprises a gas inlet channel, a material storage tank, a material dripping channel and a reaction kettle which are connected in sequence; the gas inlet channel comprises a nitrogen pressure source and an air inlet regulating valve; a liquid level meter is also erected on the side surface of the material storage tank; the material dripping channel comprises a pressure sensor, a mass flow meter, a discharging regulating valve and a discharging cut-off valve; the utility model discloses the device realizes liquid material ration dropwise add, and the flow precision lasts stably, fine assurance continuous, the steady operation of production, guaranteed product quality's stability.
Description
Technical Field
The utility model relates to a chemical production equipment especially relates to a liquid material ration dropwise add device.
Background
In the fine chemical industry, a certain specific liquid material is required to be dripped in the chemical reaction process, the specific liquid material penetrates through the whole chemical reaction process, the dripping amount is generally several kilograms per minute, the dripping flow is very small, the dripping speed is required to be uniform, and the dripping amount is accurate; the labor intensity of workers is high, and the product quality is unstable; and the mass flow meter and the regulating valve are adopted to realize automatic control, the dropping precision and the automation level are greatly improved by the scheme, but the system also has a certain problem, when the liquid level of the storage tank is lower than the liquid level of the reaction kettle, the flow of the flow meter is not enough maintained by virtue of the pressure formed by the liquid level difference, the dropping flow is unstable, the control precision is not high, and the stability of the product quality is influenced.
SUMMERY OF THE UTILITY MODEL
To prior art's not enough, this patent mainly provides a liquid material ration dropwise add system, realizes liquid material ration dropwise add, and the flow lasts stably, fine assurance continuous, the steady operation of production, guaranteed product quality's stability.
The technical scheme is as follows: a liquid material quantitative dripping device comprises a gas input channel, a material storage tank, a material dripping channel and a reaction kettle which are sequentially connected; the gas inlet channel comprises a nitrogen pressure source and an air inlet regulating valve; a liquid level meter is also erected on the side surface of the material storage tank; the material dripping channel comprises a pressure sensor, a mass flow meter, a discharging regulating valve and a discharging cut-off valve;
preferably, the liquid level meter is a high-precision diaphragm differential pressure meter.
Preferably, the pressure sensor is a high-precision diaphragm pressure sensor, one end of the pressure sensor is connected with the outlet of the storage tank through a flange, and the other end of the pressure sensor is connected with the upper opening of the reaction kettle.
Further preferably, the system also comprises a controller and a display unit, wherein the controller is connected with the pressure sensor, the mass flow meter and the liquid level meter, and the controller reads signals of the differential pressure sensor, the mass flow meter and the liquid level meter and displays the received signals of the pressure, the flow and the liquid level on the display unit. In addition, the pneumatic actuator is used for controlling the action of the corresponding valve, and the pneumatic actuator is connected with the controller, receives a control signal sent by the controller and executes the opening/closing of the corresponding valve.
Has the advantages that:
the quantitative feeding is stable and accurate by adopting two-stage control. Firstly, controlling the pressure of a discharge port of a storage tank to ensure the constant pressure of the outlet of the storage tank; when the liquid level in the material storage tank drops and the pressure sensor displays that the pressure drops, the opening of the air inlet valve is automatically adjusted, the pressure in the tank is controlled, the pressure in the tank is maintained to be constant, and the flow fluctuation caused by the pressure change in the feeding pipe or the pressure change in the reaction kettle along with the drop of the liquid level of the material is avoided; secondly, the opening degree of the feeding regulating valve is controlled according to the feedback value of the high-precision mass flowmeter, so that the precision and the stability of the flow are further ensured. Guarantee that the material feeds in to setting for the flow toward reation kettle, guarantee that it is accurate to feed in a definite quantity, guarantee product quality's stability.
Drawings
FIG. 1 is a schematic view of a quantitative dropping device for liquid material
FIG. 2 is a schematic diagram of the principle of quantitative dropping and control of materials;
fig. 3 is a flowchart of the device control procedure of the present invention.
In the figure: 1. a material storage tank; 2. a reaction kettle; 3. a nitrogen pressure source; 4. air inlet regulating valve
5. A liquid level meter; 6. a pressure sensor; 7. a mass flow meter; 8. a discharge regulating valve; 9. discharging cut-off valve
Detailed Description
The key technology and specific implementation method of the present invention are described in detail below with reference to the accompanying drawings and specific embodiments.
A liquid material quantitative dripping device is shown in figure 1, and comprises a gas input channel, a material storage tank, a material dripping channel and a reaction kettle 2 which are sequentially connected; the gas inlet channel comprises a nitrogen pressure source 3 and an air inlet regulating valve 4; a liquid level meter 5 is also erected on the side surface of the material storage tank 1; the material dripping channel comprises a differential pressure sensor 6, a mass flow meter 7, a discharging regulating valve 8 and a discharging cut-off valve 9.
The material storage tank 1 is a chemical pressure storage tank which is resistant to corrosion of the contained materials, the reaction kettle 2 is arranged according to the requirements of chemical reaction, the material storage tank 1 and the reaction kettle 2 can be arranged according to planning requirements, the material storage tank 1 can be uniformly placed in a storage tank area without being placed in a production area, the management of a factory site is facilitated, the height of the reaction kettle 2 is not required to be lower than that of the material storage tank 1, the reaction kettle 2 is arranged according to the production process sequence, and the air inlet pressure of nitrogen is controlled according to the position drop between the material storage tank 1 and the reaction kettle 2; the nitrogen pressure air source 3 is anhydrous and pure nitrogen, the air inlet regulating valve 4 is a pneumatic regulating valve of DN25, and the nitrogen pressure air source 3 enters the storage tank 1 from the upper opening of the material storage tank 1 through the air inlet dynamic regulating valve 4; the storage tank liquid level meter 5 is a high-precision diaphragm differential pressure meter and is arranged at the bottom of the side surface of the material storage tank 1, a lower measuring port of the storage tank liquid level meter 5 is connected with a lower port of the material storage tank 1, and an upper measuring port of the storage tank liquid level meter 5 is connected with an upper port of the material storage tank 1; the storage tank discharge differential pressure sensor 6 is a high-precision diaphragm pressure sensor with the measuring range of 0.6MPa, and is arranged on a pipeline at the bottom of a discharge port of the material storage tank 1; the import of the ejection of compact pipeline exit linkage mass flow meter 7 of material storage tank 1, the bore of storage tank ejection of compact mass flow meter 7 is DN15, the material is resistant to material corrosion, the export of mass flow meter 7 connects ejection of compact governing valve 8's import, the import of ejection of compact governing valve 8's export connects ejection of compact trip valve 9, the import that the export of ejection of compact trip valve 9 passes through pipeline and connects reation kettle 2, ejection of compact governing valve 8 is the pneumatic control valve who satisfies corrosion-resistant requirement, the pneumatic quick shutoff valve of ejection of compact trip valve 9 for satisfying material corrosion-resistant requirement, mass flow meter 7, ejection of compact governing valve 8 and the import that ejection of compact trip valve 9 mounted position is close to.
Adjusting a nitrogen inlet adjusting valve 4 to ensure that the pressure at the outlet of the storage tank is constant; adjusting a discharging adjusting valve 8 to ensure that the flow of materials dripped into the reaction kettle is constant, adjusting the outlet pressure of a material storage tank 1 to a set value when starting up, setting the opening of the discharging adjusting valve 8 to a starting up experience value (opening of normal production), opening a cut-off valve 9, and entering an adjusting state; starting to add materials into the reaction kettle 2, detecting the pressure value of a pressure difference sensor 6 at the outlet of the material storage tank by a controller, automatically adjusting the opening of an air inlet valve 4 when the pressure changes, and keeping the pressure at the outlet of the material storage tank 1 constant; meanwhile, the flow of the flowmeter 7 is detected, and if the flow changes, the opening of the discharging regulating valve 8 is regulated to keep the flow constant; when the device is shut down, the discharge stop valve 9 is shut off firstly, the opening degree of the discharge regulating valve 8 is regulated to zero, and the nitrogen gas inlet regulating valve 4 is shut off finally, so that the flow is constant before the device finishes working. In the process, the storage tank liquid level meter 5 detects the material liquid level of the storage tank 1, and the lower limit is reached, so that the alarm is automatically given.
The liquid level meter is preferably a high-precision diaphragm differential pressure meter; the differential pressure sensor is preferably a high-precision diaphragm differential pressure sensor; the measurement accuracy and precision are ensured.
As described above, as shown in fig. 2, the controller reads the differential pressure sensor 6 signal, the mass flow meter 7 signal and the liquid level meter 5 signal, controls the actuator of the corresponding valve through the driving circuit, and controls the opening degree of the corresponding valve. The method comprises the following specific steps: when the read pressure value is smaller than the set value, the opening degree of the air inlet adjusting valve 4 is adjusted through an actuator; when the read flow value is smaller than or larger than the set value, the opening degree of the discharging regulating valve 8 is regulated through an actuator; when the read liquid level value is smaller than the lower limit of the set value, automatically giving an alarm for prompting; FIG. 3 shows a flow chart of the process of the quantitative dropping device for materials.
Claims (5)
1. A liquid material quantitative dripping device is characterized by comprising a gas input channel, a material storage tank, a material dripping channel and a reaction kettle which are sequentially connected; the gas inlet channel comprises a nitrogen pressure source and an air inlet regulating valve; a liquid level meter is also erected on the side surface of the material storage tank; the material dripping channel comprises a pressure difference sensor, a mass flow meter, a discharge regulating valve and a discharge cut-off valve.
2. A liquid material quantitative dripping device according to claim 1 wherein the liquid level meter is a high precision diaphragm differential pressure meter.
3. The quantitative dripping device for liquid materials as claimed in claim 1, wherein one end of the pressure difference sensor is connected with the outlet of the storage tank through a flange, and the other end is connected with the upper opening of the reaction kettle; the pressure difference sensor is a high-precision diaphragm pressure difference sensor.
4. A liquid material dosing device as claimed in claim 1, characterized in that: the controller is connected with the differential pressure sensor, the mass flow meter and the liquid level meter, reads differential pressure transmission signals, flow and liquid level signals, and displays the received pressure, flow and liquid level signals on the display unit.
5. A liquid material dosing device as claimed in claim 4, characterized in that: the pneumatic actuator is connected with the controller, receives a control signal sent by the controller and executes the opening/closing of the corresponding valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921251250.7U CN211098930U (en) | 2019-08-05 | 2019-08-05 | Quantitative dripping device for liquid material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921251250.7U CN211098930U (en) | 2019-08-05 | 2019-08-05 | Quantitative dripping device for liquid material |
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| Publication Number | Publication Date |
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| CN211098930U true CN211098930U (en) | 2020-07-28 |
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| CN201921251250.7U Active CN211098930U (en) | 2019-08-05 | 2019-08-05 | Quantitative dripping device for liquid material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776925A (en) * | 2021-09-26 | 2021-12-10 | 中国科学院武汉岩土力学研究所 | Self-drilling type side pressure simulation test device and method for natural gas hydrate-containing stratum |
| CN114210268A (en) * | 2022-01-18 | 2022-03-22 | 内蒙古默锐能源材料有限公司 | Universal liquid metal sodium quantitative dripping device |
| CN114832766A (en) * | 2021-02-02 | 2022-08-02 | 上海替末流体技术有限公司 | Automatic dropwise adding reaction device |
-
2019
- 2019-08-05 CN CN201921251250.7U patent/CN211098930U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114832766A (en) * | 2021-02-02 | 2022-08-02 | 上海替末流体技术有限公司 | Automatic dropwise adding reaction device |
| CN113776925A (en) * | 2021-09-26 | 2021-12-10 | 中国科学院武汉岩土力学研究所 | Self-drilling type side pressure simulation test device and method for natural gas hydrate-containing stratum |
| CN113776925B (en) * | 2021-09-26 | 2022-05-27 | 中国科学院武汉岩土力学研究所 | Self-drilling type side pressure simulation test device and method for natural gas hydrate-containing stratum |
| US11604128B1 (en) | 2021-09-26 | 2023-03-14 | Institute Of Rock And Soil Mechanics, Chinese Academy Of Sciences | Self drilling pressure simulation test device and method for formation containing natural gas hydrate |
| CN114210268A (en) * | 2022-01-18 | 2022-03-22 | 内蒙古默锐能源材料有限公司 | Universal liquid metal sodium quantitative dripping device |
| CN114210268B (en) * | 2022-01-18 | 2024-04-16 | 内蒙古默锐能源材料有限公司 | Universal liquid metal sodium quantitative dripping device |
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