CN206056718U - A kind of steam boiler liquid level of steam drum detecting system - Google Patents
A kind of steam boiler liquid level of steam drum detecting system Download PDFInfo
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- CN206056718U CN206056718U CN201620622601.0U CN201620622601U CN206056718U CN 206056718 U CN206056718 U CN 206056718U CN 201620622601 U CN201620622601 U CN 201620622601U CN 206056718 U CN206056718 U CN 206056718U
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- liquid level
- balancing vessel
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Abstract
This utility model provides a kind of steam boiler liquid level of steam drum detecting system, including：Double-chamber balancing vessel, differential pressure transmitter and connecting pipe therebetween, linker, controller, described steam boiler liquid level of steam drum detecting system also include：The temperature element arranged on double-chamber balancing vessel, described temperature element are used for detecting the water temperature in double-chamber balancing vessel, to calculate the density of water；Connecting pipe between connection double-chamber balancing vessel and differential pressure transmitter, using lagging facility, temperature element is set in lagging facility, described temperature element embedment heat-insulation layer is interior or inserts in connecting pipe, described temperature element is used for detecting the water temperature in connecting pipe, to calculate the density of water.This utility model improves the accuracy in detection of boiler vapor liquid level, degree of regulation, it is ensured that steam water-level is stablized and ensured its safety.
Description
Technical field
This utility model is related to level gauging field, more particularly, to a kind of steam boiler liquid level of steam drum detecting system.
Background technology
Steam boiler drum is pressure vessel, is the pressure vessel that water becomes vapour, is to ensure boiling, equipped with less than one inside which
Half water yield.For safety, boiler factory is required to the double-chamber balancing vessel of the Water Level Control of Steam scope supporting detection liquid level,
Several docking ports are left on drum body connected, double-chamber balancing vessel flange spacing is generally 640mm, supporting by which
Electric contact point fluviograph to show, report to the police, positive locking；Normal range of operation is marked in boiler description generally individually, such as-
50mm～0～+50mm, -75mm ,+75mm are reported to the police, -100mm ,+100mm interlocking etc..The detection of steam boiler liquid level of steam drum at present
Major way by:Double-chamber balancing vessel adds poor change, and using single chamber container plus radar level gauge, its signal passes to control system, from
It is dynamic to adjust inflow, to ensure level stability.
As reserved opening of the double-chamber balancing vessel with boiler-steam dome passes through connecting pipe Hard link, its distance is longer, then exist
Water temperature in double-chamber balancing vessel is different from the coolant-temperature gage in boiler-steam dome；The characteristics of due to double-chamber balancing vessel structure, has one
Divide connecting tube outside, then manage interior coolant-temperature gage also different from the coolant-temperature gage in double-chamber balancing vessel；The different then density of temperature are different,
Because of P=ρ gH, water level H certainly exists error.Furthermore detections of radar is used, radar is gamut, such as -300～+300mm correspondence 4-
20mADC, general boiler water level scope are -50～+50mm, then its precision is low, and corresponding error is also big；Simultaneously in single chamber container
Inside there is steam, have certain impact on radar wave.
Level Detection is forbidden, and leads to not put into steam water-level automatic regulating system, causes error big or detection is inaccurate,
There is potential safety hazard.
The content of the invention
In order to improve accuracy of detection, ensure boiler safety, this utility model is examined there is provided a kind of steam boiler liquid level of steam drum
Examining system, including：Double-chamber balancing vessel, differential pressure transmitter and connecting pipe therebetween, linker, controller, described steaming
Boiler furnace liquid level of steam drum detecting system also includes：
The temperature element arranged on double-chamber balancing vessel, described temperature element are used for detecting the water in double-chamber balancing vessel
Temperature, to calculate the density of water；
Connecting pipe between connection double-chamber balancing vessel and differential pressure transmitter, using lagging facility, sets in lagging facility
Temperature element is put, described temperature element embedment heat-insulation layer is interior or inserts in connecting pipe, and described temperature element is led for detecting
Water temperature in pressure pipe, to calculate the density of water.
Alternatively, described linker, is the connection facility between boiler-steam dome and double-chamber balancing vessel, comprising draining
Pipe, down-comer and blowoff valve, described drain pipe connect double-chamber balancing vessel, obliquely mounting arrangements；Described down-comer
Connect boiler-steam dome, obliquely mounting arrangements；Drain pipe, down-comer are connected by described blowoff valve, and less than in boiler-steam dome
Heart line is not less than 20 meters, and centre does not have U-bend, prevents hydrops and freezed in winter, dirty accumulated plugging pipeline after blowing out, it is ensured that
Heating system reliably working, and play self-balancing effect to the water level in double-chamber balancing vessel and boiler-steam dome, can use ∮'s 10 or ∮ 8
The corrosion-resistant material pipe of high temperature high voltage resistant.
Alternatively, described controller, its input are connected with described differential pressure transmitter, temperature element, for calculating
The density and liquid level of steam drum of water.
The beneficial effects of the utility model are：Improve accuracy in detection, the degree of regulation of boiler vapor liquid level, it is ensured that vapour
Bag stable level has simultaneously ensured its safety.
Description of the drawings
Fig. 1 represents the structural representation of boiler vapor liquid level detecting system in embodiment of the present utility model；
Fig. 2 represents the control schematic diagram of boiler vapor liquid level detecting system in embodiment of the present utility model.
Wherein in figure：1st, boiler-steam dome；2nd, double-chamber balancing vessel；3rd, the temperature element arranged on double-chamber balancing vessel；4、
Connecting pipe between connection double-chamber balancing vessel and differential pressure transmitter；13rd, double-chamber balancing vessel and differential pressure transmitter pilot are connected
The lagging facility of pipe；Thermometric unit is set in the employing lagging facility for the 5th, connecting double-chamber balancing vessel and differential pressure transmitter connecting pipe
Part；6th, differential pressure transmitter；7th, controller；9th, drain pipe；10th, blowoff valve；8th, down-comer；11st, the benchmark in double-chamber balancing vessel
Cup；12nd, outlet of the benchmark cup in double-chamber balancing vessel, connects the negative terminal of differential pressure transmitter；15th, the outlet of double-chamber balancing vessel,
Connect the anode of differential pressure transmitter；14th, the upper connecting tube between boiler and double-chamber balancing vessel；16th, between boiler and double-chamber balancing vessel
Lower connecting tube.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure and should not be by embodiments set forth here
Limited.On the contrary, there is provided embodiment be able to understand the disclosure with cutting more thoroughly, and can be complete by the scope of the present disclosure
Convey to those skilled in the art.
As shown in figure 1, for the structural representation of boiler vapor liquid level detecting system in embodiment of the present utility model, at this
In embodiment, boiler vapor liquid level detecting system includes double-chamber balancing vessel 2 and its temperature element 3, connecting pipe 4 and its heat-insulation layer
13 and temperature element 5, differential pressure transmitter 6, controller 7.Temperature element 3 is installed in the perforating first on double-chamber balancing vessel 2, then
The safety check of Jing labour departments is meeting the safety requirements of pressure vessel；Boiler-steam dome 1 and dual chamber balance are held by connecting tube 14,16
Device 2 is connected, and the positive and negative mouth with connecting pipe 4 by just (15) of double-chamber balancing vessel 2 negative (12) outlet with differential pressure transmitter 6 connects
Connect；In 4 periphery winding lagging facility 13 of connecting pipe, while buying in lagging facility 13 or putting temperature element 5 temperature element 5
Enter inside connecting pipe 4 to ensure the accuracy of its thermometric；Again the signal of temperature element 3, temperature element 5, differential pressure transmitter 6 is connect
To the input of controller 7；The basic detecting system of composition.
Referring to Fig. 1 and Fig. 2, boiler vapor liquid level detecting system also includes down-comer 8 and drain pipe 9 and blowoff valve 10, three
Person constitutes a linker.Linker plays blowdown effect；As blowoff valve 10 is less than more than 20 meters of boiler-steam dome centrage, drum
Impact of the pulse ripple of water level to double-chamber balancing vessel 2 in 1 can be ignored；There are current in down-comer 8 and drain pipe 9, can be right
Boiler-steam dome 1 and double-chamber balancing vessel 2 play self-balancing effect.
With continued reference to Fig. 1 and Fig. 2, its course of work is as follows：The negative pressure line 4 of differential pressure transmitter 6 and dual chamber balance are held
Benchmark cup 11 in device 2 fills water, and the water level inside double-chamber balancing vessel 2 is identical with the liquid level in boiler-steam dome 1.It is flat in dual chamber
Inside weighing apparatus container 2 (cup containing benchmark 11), its temperature t can detect by temperature element 31, then its density p1Can be counted by controller 7
Calculate；The water temperature of the connecting pipe 4 between double-chamber balancing vessel 2 and differential pressure transmitter 6 can detect its temperature t by temperature element 52,
Then its density p2Can be calculated by controller 7；The flange spacing of double-chamber balancing vessel 2 is fixed number H1, on benchmark cup 11, plane is extremely
12 spacing of outlet of double-chamber balancing vessel is fixed number H2, between the outlet 15 of the outlet 12 to double-chamber balancing vessel of double-chamber balancing vessel
Away from for fixed number H3, the spacing of the outlet 15 to differential pressure transmitter 6 of the double-chamber balancing vessel positive and negative connecting pipe for differential pressure transmitter 6
Vertical height is identical, and equality of temperature presses together the then pressure P born by differential pressure transmitter 62Cancel out each other, the pressure P in boiler-steam dome 11
The positive and negative terminal for simultaneously acting on differential pressure transmitter 6 is also cancelled out each other, and the liquid level of boiler-steam dome 1 is H, with boiler load change and
Change, it is also controlled volume to belong to variable, and the spacing of the minimum requirements liquid level to connecting tube 16 of boiler-steam dome 1 is H4；Then differential pressure becomes
Send the pressure P suffered by 6 positive and negative terminal of device+、P-Respectively：
P-=P1+ρ1gH2+ρ2gH3+P2It is the function of density, temperature-resistant, density is constant, then be constant；
P+=P1+ρ1gH4+ρ1gH+P2Temperature-resistant, density is constant, then be the function of H；
The pressure reduction Wei ⊿ P=P that then differential pressure transmitter 6 bears+-P-=ρ1g(H4+H-H2)-ρ2gH3
H=(⊿ P+ ρ2gH3)/ρ1g-H4+H2
It is visible by above formula, the density (ρ that controller 7 is drawn by calculating temperature1、ρ2) signal and pressure reduction (⊿ P) letter
Number, liquid level H in boiler-steam dome 1 can be accurately calculated；Ambient temperature (t is considered2) change, it is contemplated that dual chamber balance
Water temperature (t in container 21) impact of the change to Level Detection and it is compensated, while also contemplating boiler-steam dome 1 ripple of itself
The dynamic impact to double-chamber balancing vessel 2.
The above is preferred implementation of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from principle described in the utility model, can also make some improvements and modifications, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (2)
1. a kind of steam boiler liquid level of steam drum detecting system, including：Double-chamber balancing vessel, differential pressure transmitter and leading therebetween
Pressure pipe, linker, controller, described steam boiler liquid level of steam drum detecting system also include：
The temperature element arranged on double-chamber balancing vessel, described temperature element be used for detecting the water temperature in double-chamber balancing vessel,
To calculate the density of water；
Connecting pipe between connection double-chamber balancing vessel and differential pressure transmitter, using lagging facility, arranges in lagging facility and surveys
Warm element, described temperature element embedment heat-insulation layer is interior or inserts in connecting pipe, and described temperature element is used for detecting connecting pipe
Interior water temperature, to calculate the density of water.
2. a kind of steam boiler liquid level of steam drum detecting system as claimed in claim 1, it is characterised in that linker is by draining
Pipe, down-comer and blowoff valve composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620622601.0U CN206056718U (en) | 2016-06-22 | 2016-06-22 | A kind of steam boiler liquid level of steam drum detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620622601.0U CN206056718U (en) | 2016-06-22 | 2016-06-22 | A kind of steam boiler liquid level of steam drum detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206056718U true CN206056718U (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620622601.0U Active CN206056718U (en) | 2016-06-22 | 2016-06-22 | A kind of steam boiler liquid level of steam drum detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525561A (en) * | 2016-06-22 | 2017-12-29 | 山东省冶金设计院股份有限公司 | A kind of steam boiler liquid level of steam drum detecting system |
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2016
- 2016-06-22 CN CN201620622601.0U patent/CN206056718U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525561A (en) * | 2016-06-22 | 2017-12-29 | 山东省冶金设计院股份有限公司 | A kind of steam boiler liquid level of steam drum detecting system |
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