CN209623813U - A kind of system improving deaerator level measurement accuracy - Google Patents
A kind of system improving deaerator level measurement accuracy Download PDFInfo
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- CN209623813U CN209623813U CN201920348377.4U CN201920348377U CN209623813U CN 209623813 U CN209623813 U CN 209623813U CN 201920348377 U CN201920348377 U CN 201920348377U CN 209623813 U CN209623813 U CN 209623813U
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- solenoid valve
- probe tube
- moisturizing
- water
- aqueduct
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Abstract
The utility model relates to a kind of systems for improving deaerator level measurement accuracy, to solve the problems, such as that existing measurement method needs moisturizing in transmitter positive pressure side probe tube under negative pressure state.The utility model includes isolation and two parts of moisturizing.Shielding system includes isolation solenoid valve；Water charging system includes water supply solenoid valve, moisturizing hand-operated valve, aqueduct.One, which is installed, after the positive pressure side hand-operated valve of level measuring probe tube, before condensation column only isolates solenoid valve, one, which is installed, after the suction side hand-operated valve of level measuring probe tube, before measuring transducer only isolates solenoid valve, one is drawn from the water inlet main pipe of oxygen-eliminating device to be connected with aqueduct, and with condensation column.Isolation solenoid valve and water supply solenoid valve are connected by respective signal-transmitting cable with distant place control system, and the instruction of distant place control system is received, and are isolated, moisturizing, the overall processes such as recovery automatically control.The utility model has the characteristics that automatic timely moisturizing, to improve the accuracy of deaerator level measurement.
Description
Technical field
The utility model relates to a kind of systems for improving deaerator level measurement accuracy, belong to automatic control for thermal power plant skill
Art field.
Background technique
The main function of oxygen-eliminating device is exactly the oxygen and other gas removed in boiler feedwater with the method for heating in thermal power plant
Body guarantees the quality of water supply；Oxygen-eliminating device has the function of heating water supply again, improves feed temperature simultaneously.The water of oxygen-eliminating device lower part
Case is used to store water supply, and main function is the water for balancing feed pump and being sent into water supply from oxygen-eliminating device to boiler and condensate pump,
Meet the needs of boiler feed capacity.When deaerator storage tank water level is higher, deaerating effect is reduced；When deaerator storage tank water level is lower
When, boiler feed capacity is insufficient, is easy to happen that feedwater flow is low to cause compressor emergency shutdown accident.
Generallyd use in automatic control for thermal power plant system differential pressure method measurement deaerator level, such as application No. is
201520074194.X Chinese patent, the key equipment of use is differential pressure water level measuring transmitter.
It is anhydrous in the level measuring transmitter positive pressure side reference water pipe after maintenance in oxygen-eliminating device initial operation stage, it cannot show
True water level value.It needs after operation a period of time, after some vapor in oxygen-eliminating device condenses into water, joins full of positive pressure side
When than water pipe, measure just more normal.And the process of steam condensation Cheng Shui is slow, deaerator level needs to wait longer time
It could show normally, thus not be able to satisfy the requirement of operation.
Negative pressure and high temperature when oxygen-eliminating device is run, so that the water in water level transmitter positive pressure side comparing water column easily evaporates, often
Full pipe condition often is not achieved, the reference water level of water level transmitter positive pressure side is relatively low, and deaerator level measurement is higher.
Utility model content
The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and it is reasonable to provide a kind of design
The system for improving deaerator level measurement accuracy.
The technical scheme in the invention for solving the above technical problem is: a kind of raising deaerator level measurement accuracy
System, including oxygen-eliminating device is connected with water inlet pipe and outlet pipe on the oxygen-eliminating device, and the water inlet pipe is connected to water inlet main pipe；
The oxygen-eliminating device is also connect by probe tube with the positive pressure side of level measuring transmitter and suction side respectively, and in the probe tube
On be separately installed with a sampling hand-operated valve, be provided with condensation column on the positive pressure side probe tube of level measuring transmitter, it is described
Level measuring transmitter is connect with distant place control system.This is existing system structure, i.e. original system.
On positive pressure side (also referred to as reference side) probe tube of the level measuring transmitter, sampling hand-operated valve and condensation column it
Between No.1 isolation solenoid valve is installed；On suction side (also referred to as measurement side) probe tube of the level measuring transmitter, sampling
No. two isolation solenoid valves are installed between hand-operated valve and level measuring transmitter；Aqueduct is led in water inlet main pipe, it is described
Aqueduct is connect with condensation column, and is sequentially installed with moisturizing hand-operated valve and water supply solenoid valve along water (flow) direction on aqueduct；
The No.1 isolation solenoid valve, No. two isolation solenoid valves and water supply solenoid valve are connect with distant place control system.This is to be in original
Increased new system on system.
Furthermore, the aqueduct is the stainless steel tube that diameter is 12cm.
Furthermore, isolation solenoid valve, water supply solenoid valve receive the instruction of distant place control system, realize isolation, moisturizing,
The overall processes such as recovery automatically control.
The working method of the system of the raising deaerator level measurement accuracy is as follows:
When normal measurement, two sampling hand-operated valves, moisturizing hand-operated valve, No.1 isolation solenoid valve and No. two isolation electricity in system
Magnet valve is open state, and water supply solenoid valve is in off state；At this point, newly-increased system is on the method for operation of original system without influence.
It when being isolated, is issued and is instructed by distant place control system, No.1 isolation solenoid valve and No. two isolation solenoid valves are closed
It closes, distant place control system makes measurement water level keep the numerical value before isolation constant while issuing and instructing；
When carrying out moisturizing, is issued and instructed by distant place control system, water supply solenoid valve opened, from the water inlet main pipe of oxygen-eliminating device
Positive pressure side probe tube moisturizing to level measuring transmitter；
When being restored, distant place control system issues instruction, closes water supply solenoid valve, opens No.1 isolation solenoid valve and two
Number isolation solenoid valve, water supply solenoid valve close in place, after No.1 isolation solenoid valve and No. two isolation solenoid valves reach position simultaneously, water
Position measured value is transformed into measuring state by hold mode, and system is restored.
The utility model compared with prior art, has the following advantages that and effect: the structure design of the utility model is reasonable, tool
There is the characteristics of automatic timely moisturizing, the accuracy of deaerator level measurement can be improved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing deaerator level measuring system in the utility model embodiment.
Fig. 2 is the structural schematic diagram that the system of deaerator level measurement accuracy is improved in the utility model embodiment.
In figure: 1, No. two isolation solenoid valve 2 of No.1 isolation solenoid valve, water supply solenoid valve 3, moisturizing hand-operated valve 4, aqueduct 5,
Distant place control system 6, water inlet main pipe 8, water inlet pipe 9, outlet pipe 10, level measuring transmitter 11, condensation column 12, takes oxygen-eliminating device 7
Sample hand-operated valve 13.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
Referring to Fig. 1-Fig. 2, the system of the raising deaerator level measurement accuracy in the present embodiment, including oxygen-eliminating device 7, it removes
Water inlet pipe 9 and outlet pipe 10 are connected on oxygen device 7, water inlet pipe 9 is connected to water inlet main pipe 8；Oxygen-eliminating device 7 also passes through probe tube respectively
It is connect with the positive pressure side of level measuring transmitter 11 and suction side, and is separately installed with a sampling hand-operated valve on probe tube
13, condensation column 12 is provided on the positive pressure side probe tube of level measuring transmitter 11, level measuring transmitter 11 and a distant place are controlled
System 6 processed connects.This is existing system structure, i.e. original system such as Fig. 1.
On positive pressure side (also referred to as reference side) probe tube of level measuring transmitter 11, in sampling hand-operated valve 13 and condensation column 12
Between No.1 isolation solenoid valve 1 is installed；On suction side (also referred to as measurement side) probe tube of level measuring transmitter 11, sampling
No. two isolation solenoid valves 2 are installed between hand-operated valve 13 and level measuring transmitter 11；Leading to diameter in water inlet main pipe 8 is
The stainless steel aqueduct 5 of 12cm, aqueduct 5 are connect with condensation column 12, and are sequentially installed on aqueduct 5 along water (flow) direction
Moisturizing hand-operated valve 4 and water supply solenoid valve 3；1, No. two isolation solenoid valve 2 of No.1 isolation solenoid valve and water supply solenoid valve 3 are and a distant place
Control system 6 connects.This is that increased new system, the system after optimization are as shown in Figure 2 on original system.
Isolation solenoid valve, water supply solenoid valve 3 receive the instruction of distant place control system 6, realize that isolation, moisturizing, recovery etc. are complete
Process automatically controls.
In the present embodiment, the working method for improving the system of deaerator level measurement accuracy is as follows:
When normal measurement, in system two sampling hand-operated valves 13, moisturizing hand-operated valve 4, No.1 isolation solenoid valve 1 and No. two every
It is open state from solenoid valve 2, water supply solenoid valve 3 is in off state；At this point, newly-increased system to the method for operation of original system without
It influences.
When being isolated, is issued and instructed by distant place control system 6, by No.1 isolation solenoid valve 1 and No. two isolation solenoid valves 2
It closes, distant place control system 6 makes measurement water level keep the numerical value before isolation constant while issuing and instructing；
When carrying out moisturizing, is issued and instructed by distant place control system 6, water supply solenoid valve 3 opened, from the water inlet of oxygen-eliminating device 7
Positive pressure side probe tube moisturizing of the main pipe 8 to level measuring transmitter 11；
When being restored, distant place control system 6 issues instruction, closes water supply solenoid valve 3, opens No.1 isolation solenoid valve 1
With No. two isolation solenoid valves 2, is closed in place in water supply solenoid valve 3 while No.1 isolation solenoid valve 1 and No. two isolation solenoid valves 2 are opened
After in place, water level measurements are transformed into measuring state by hold mode, and system is restored.
Although the utility model is disclosed as above with embodiment, its protection scope being not intended to limit the utility model,
Any technical staff for being familiar with this technology, it is made in the conception and scope for not departing from the utility model to change and retouch,
It all should belong to the protection range of the utility model.
Claims (2)
1. a kind of system for improving deaerator level measurement accuracy, including oxygen-eliminating device (7) is connected on the oxygen-eliminating device (7)
Water inlet pipe (9) and outlet pipe (10), the water inlet pipe (9) are connected to water inlet main pipe (8)；The oxygen-eliminating device (7) also passes through respectively
Probe tube is connect with the positive pressure side of level measuring transmitter (11) and suction side, and one is separately installed on the probe tube
It samples hand-operated valve (13), condensation column (12), the water level is provided on the positive pressure side probe tube of level measuring transmitter (11)
Measuring transducer (11) is connect with distant place control system (6)；It is characterized by: the positive pressure side of the level measuring transmitter (11)
On probe tube, No.1 isolation solenoid valve (1) is installed between sampling hand-operated valve (13) and condensation column (12)；The level measuring
On the suction side probe tube of transmitter (11), No. two are equipped between sampling hand-operated valve (13) and level measuring transmitter (11)
Isolation solenoid valve (2)；It being led to aqueduct (5) in water inlet main pipe (8), the aqueduct (5) connect with condensation column (12), and
Moisturizing hand-operated valve (4) and water supply solenoid valve (3) are sequentially installed with along water (flow) direction on aqueduct (5)；The No.1 isolation
Solenoid valve (1), No. two isolation solenoid valves (2) and water supply solenoid valve (3) are connect with distant place control system (6).
2. the system according to claim 1 for improving deaerator level measurement accuracy, it is characterised in that: the aqueduct
(5) for diameter be 12cm stainless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920348377.4U CN209623813U (en) | 2019-03-19 | 2019-03-19 | A kind of system improving deaerator level measurement accuracy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920348377.4U CN209623813U (en) | 2019-03-19 | 2019-03-19 | A kind of system improving deaerator level measurement accuracy |
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| CN209623813U true CN209623813U (en) | 2019-11-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990865A (en) * | 2019-03-19 | 2019-07-09 | 华电电力科学研究院有限公司 | A kind of system and its working method improving deaerator level measurement accuracy |
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2019
- 2019-03-19 CN CN201920348377.4U patent/CN209623813U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990865A (en) * | 2019-03-19 | 2019-07-09 | 华电电力科学研究院有限公司 | A kind of system and its working method improving deaerator level measurement accuracy |
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