CN218653843U - Absorption tower densimeter entry flow control optimization device - Google Patents
Absorption tower densimeter entry flow control optimization device Download PDFInfo
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- CN218653843U CN218653843U CN202222955995.XU CN202222955995U CN218653843U CN 218653843 U CN218653843 U CN 218653843U CN 202222955995 U CN202222955995 U CN 202222955995U CN 218653843 U CN218653843 U CN 218653843U
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- densimeter
- absorption tower
- loop controller
- flow control
- regulating valve
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Abstract
The utility model provides an absorption tower densimeter entry flow control optimization device, is including setting up the single loop controller in the switch board, the densimeter is connected to the input of single loop controller, and the governing valve is connected to the output of single loop controller, and during the inside pipeline of desulfurization absorption tower was located to the densimeter, the entry of desulfurization absorption tower inside pipeline was located to the governing valve. The utility model avoids the problem of densimeter damage caused by improper wear, and prolongs the service life; the regulating valve of a 380VAC power supply is adopted, so that the regulation is stable and accurate; the single-loop controller with 4-20mA input and output is adopted, so that the expansibility is strong; the system has simple integral structure, reduces fault points and is convenient to maintain.
Description
Technical Field
The utility model relates to a flow control optimizing apparatus, concretely relates to absorption tower densimeter entry flow control optimizing apparatus.
Background
In a thermal power plant, the density meter of the desulfurization absorption tower has the main functions of measuring the density of slurry inside the absorption tower on line, ensuring that the density of the slurry in the absorption tower is within a certain range, ensuring that auxiliary equipment related to the absorption tower runs safely and stably, meeting the relevant requirements of the operation of the absorption tower and giving an alarm in time under abnormal conditions. The wearing and tearing that mass flow meter can be accelerated to desulfurization absorption tower densimeter entry flow is big then, and the entry flow is little then can cause the measurement inaccurate, guarantees that absorption tower densimeter entry flow can increase the life of densimeter in certain within range, improves density measurement's accuracy. Therefore, accurately controlling the inlet flow of the density meter of the absorption tower has great significance for maintaining the safe and stable operation of the whole desulfurization system.
At present, the inlet flow of a desulfurization absorption tower densimeter generally adopted by a power plant is not effectively controlled, the abrasion of a mass flow meter can be accelerated if the inlet flow is large, and the inaccurate measurement can be caused if the inlet flow is small, so that the accurate control of the inlet flow of the absorption tower densimeter has great significance for maintaining the safe and stable operation of the whole desulfurization system. However, most thermal power plants at the present stage do not have a good mode for controlling the inlet flow of the density meter of the absorption tower, so that the wear of the density meter is easily caused, important measurement parameters are not monitored, and environmental protection accidents are easily caused.
Disclosure of Invention
The utility model aims to solve the technical problem that, overcome the not enough of prior art, provide a simple structure, the cost is lower, easy to assemble maintains, the high absorption tower densimeter entry flow control optimizing apparatus of reliability.
The utility model provides a technical scheme that its technical problem adopted is, an absorption tower densimeter entry flow control optimization device, including setting up the single loop controller in the switch board, the densimeter is connected to the input of single loop controller, and the governing valve is connected to the output of single loop controller, and during the inside pipeline of desulfurization absorption tower was located to the densimeter, the entry of desulfurization absorption tower inside pipeline was located to the governing valve.
Furthermore, the single-loop controller is connected with the densimeter through a power line and a signal line, the voltage of the power line is 220V, and the current of the signal line is 4-20 mA.
Furthermore, the single-loop controller is connected with the regulating valve through a power cable and a control line, the voltage of the power cable is 380V, and the current of the control line is 4-20 mA.
Furthermore, the regulating valve is driven by a motor, and valve position control within the range of 0-100% can be realized.
Compared with the prior art, the utility model, have following advantage: (1) The problem of damage of the densimeter caused by improper use and abrasion is avoided, and the service life is prolonged, (2) a regulating valve of a 380VAC power supply is adopted, and the regulation is stable and accurate; (3) The single-loop controller with 4-20mA input and output is adopted, so that the expansibility is strong; (4) The system has simple integral structure, reduces fault points and is convenient to maintain.
Drawings
FIG. 1 is an installation schematic diagram of an inlet flow control optimization device of a densimeter of a middle absorption tower of the utility model;
fig. 2 is a wiring diagram of the single-loop controller of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to the drawings, the embodiment comprises a single-loop controller 2 arranged in a control cabinet 1, wherein the input end of the single-loop controller 2 is connected with a densimeter 3, the output end of the single-loop controller 2 is connected with a regulating valve 4, the densimeter 3 is arranged in an internal pipeline of a desulfurization absorption tower 5, and the regulating valve 4 is arranged at the inlet of the internal pipeline of the desulfurization absorption tower 5.
The single-loop controller 2 is connected with the densimeter 3 through a power line and a signal line, the voltage of the power line is 220V, and the current of the signal line is 4-20 mA. The single-loop controller 2 is connected with the regulating valve 4 through a power cable and a control line, the voltage of the power cable is 380V, and the current of the control line is 4-20 mA.
The single-loop controller 2 receives the flow signal sent by the densimeter 3, and sends a control signal after operation by comparing with a preset value (manual setting) to control the opening of the regulating valve 4 arranged in front of the densimeter 3.
The adjusting valve 4 is driven by a motor and can realize valve position control within the range of 0-100 percent, thereby controlling the inlet flow of the densimeter, prolonging the service life of the densimeter and preventing the densimeter from being damaged due to improper wear.
The working process of the embodiment:
the first step is as follows: a flow signal (4-20 mA) measured by a densimeter 3 in a pipeline inside the desulfurization absorption tower 5 is connected to the input end of the single-loop controller 2;
the second step is that: a preset value is set on the single-loop controller 2, generally the middle value of the flow range of the densimeter 3;
the third step: a control signal (4-20 mA) output by the single-loop controller 2 is connected to the regulating valve 4;
the fourth step: the regulating valve 4 is provided with a 380VAC power supply for driving the motor.
The fifth step: the regulating valve 4 regulates the opening of the valve after receiving a control signal (4-20 mA), so as to regulate the flow of the densimeter 3 in the desulfurization absorption tower 5;
and a sixth step: when the slurry in the inner pipeline of the desulfurization absorption tower 5 flows through the regulating valve 4, the flow of the densimeter 3 can be effectively controlled.
In the embodiment, the single-loop controller 2 is used for sending an instruction to control the regulating valve 4, so that the flow of the inlet of the densimeter 3 in the pipeline inside the desulfurization absorption tower 5 is controlled, unnecessary abrasion of slurry on the densimeter 3 can be greatly reduced, the measurement accuracy of the densimeter 3 is improved, and the problem of damage to the densimeter caused by improper abrasion is avoided; the service life is prolonged, and the production cost is saved. The single-loop controller 2 is arranged in the control cabinet to prevent slurry corrosion or water inflow to cause short circuit.
Various modifications and variations of the present invention may be made by those skilled in the art, which are still within the scope of the present invention provided they are within the scope of the claims and their equivalents.
What is not described in detail in the specification is prior art that is well known to those skilled in the art.
Claims (4)
1. The utility model provides an absorption tower densimeter entry flow control optimizing apparatus, includes the single loop controller who sets up in the switch board, its characterized in that: the input end of the single-loop controller is connected with the densimeter, the output end of the single-loop controller is connected with the regulating valve, the densimeter is arranged in the internal pipeline of the desulfurization absorption tower, and the regulating valve is arranged at the inlet of the internal pipeline of the desulfurization absorption tower.
2. The absorption tower densimeter inlet flow control optimization device of claim 1, wherein: the single-loop controller is connected with the densimeter through a power line and a signal line, the voltage of the power line is 220V, and the current of the signal line is 4-20 mA.
3. The absorption tower densitometer inlet flow control optimization device of claim 1 or 2, wherein: the single-loop controller is connected with the regulating valve through a power cable and a control line, the voltage of the power cable is 380V, and the current of the control line is 4-20 mA.
4. The absorption tower densitometer inlet flow control optimization device of claim 1 or 2, wherein: the regulating valve is driven by a motor, and can realize valve position control within the range of 0-100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222955995.XU CN218653843U (en) | 2022-11-07 | 2022-11-07 | Absorption tower densimeter entry flow control optimization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222955995.XU CN218653843U (en) | 2022-11-07 | 2022-11-07 | Absorption tower densimeter entry flow control optimization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218653843U true CN218653843U (en) | 2023-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222955995.XU Active CN218653843U (en) | 2022-11-07 | 2022-11-07 | Absorption tower densimeter entry flow control optimization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218653843U (en) |
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2022
- 2022-11-07 CN CN202222955995.XU patent/CN218653843U/en active Active
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