CN205981740U - Flue gas able to programme prevents that stifled sampler pressure differential pressure sweeps control box - Google Patents
Flue gas able to programme prevents that stifled sampler pressure differential pressure sweeps control box Download PDFInfo
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- CN205981740U CN205981740U CN201620941081.XU CN201620941081U CN205981740U CN 205981740 U CN205981740 U CN 205981740U CN 201620941081 U CN201620941081 U CN 201620941081U CN 205981740 U CN205981740 U CN 205981740U
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- differential pressure
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Abstract
The utility model provides a flue gas able to programme prevents that stifled sampler pressure differential pressure sweeps control box, characterized by includes the box, programmable controller, pressure regulating filter, the steady voltage gas holder, two solenoid valve, pressure regulating filter passes through tube coupling steady voltage gas holder, steady voltage gas holder export blowing air pipe meets two solenoid valve of direct action type on the road, the blowing air pipe way adopts phi 10 seamless steel pipe and two clamping sleeve joint to be connected in the control box, the threading of blowing air pipe pass to the box of two solenoid valve export connects, prevent that stifled sampler pressure differential pressure sweeps with compressed air interface and threading articulate, two solenoid valve's of programmable logic controller control output termination control input end. Pressure regulating filter pressure sets up at 0.2~0.4Mpa, and the capacity of steady voltage gas holder is 3L.
Description
Technical field
This utility model is related to a kind of programmable flue gas pressures or differential pressure purging control chamber and in particular to one kind can be changed blows
Flue gas pressures (differential pressure) the purging control chamber of flyback time and frequency.
Background technology
Anti-blocking sampling, accurately measurement, are power plant's consistent pursuits in flue gas pressures (differential pressure) measurement for many years.To boiler
In tail flue gas processing system, (flue gas pressures, demister differential pressure etc.) must solve anti-blocking problem and just can continuously accurately be surveyed
Amount.The flue gas block-proof pressure-taking of power plant typically adopts Antichoking blast pressure sampler and manual compression air to purge deashing at present.Because belonging to
In manual reverse gas cleaning, when finding that measured value is abnormal, personnel just can go on-site manual to open, simultaneously in purge time and frequency
On cannot ensure, or often clogging to be occurred.
Particularly wet desulfurization demister differential pressure measurement, in flue gas, water capacity is larger, such as cannot purge in time, then can cause
Containing wet flue dust in probe tube encrustation, accumulate over a long period and cause to sample blockage, the normal measurement of impact pressure (differential pressure).In recent years
Come, with the development of automatization, the output control using Programmable Logic Controller and electromagnetic valve can be according to different Operating condition adjustments
Purge time and frequency are it is ensured that the reliability of measurement, and then reduce the workload of operation maintenance personnel.Actual application prospect is very
Wide.
Utility model content
The purpose of this utility model is to overcome the limitation of traditional manual purging and ageing shortcoming, provides a kind of mark
Standardization, the programmable flue gas anti-blocking sampler pressure differential pressure that programmable, reliability is high purging control chamber.
The technical solution of the utility model：The anti-blocking sampler pressure differential pressure of programmable flue gas purges control chamber, it is characterized in that
Including casing, Programmable Logic Controller, pressure regulation filter, voltage stabilizing air accumulator, two three-way electromagnetic valves, pressure regulation filter is connected by pipeline
Voltage stabilizing air accumulator, voltage stabilizing reservoir outlet purging air pipe connects Direct Action Type two three-way electromagnetic valve, in control chamber, purging air pipe is adopted
It is connected with double card bell and spigot joint with Φ 10 seamless steel pipe, the purging air pipe of two three-way electromagnetic valve outlets causes the BULKHEAD UNION of casing,
Anti-blocking sampler pressure differential pressure purging compressed air interface is connected with BULKHEAD UNION；Controlled by Programmable Controller exports termination two
The control signal of three-way electromagnetic valve.
Pressure regulation filter pressure is arranged on 0.2～0.4Mpa, and the capacity of voltage stabilizing air accumulator is 3L.
Compressed air for instrument enters in voltage stabilizing air accumulator through pressure regulation filter, and pressure regulation filter pressure is arranged on 0.2～
0.4Mpa, the capacity of voltage stabilizing air accumulator is 3L, also ensures that the use in a period of time after compressed air cut-off while its voltage stabilizing
Tolerance.Vacuum tank outlet connects Direct Action Type two three-way electromagnetic valve, and electromagnetic valve is normally off, and it is opened and close and passes through programmable control
Device processed controls.Programmable Logic Controller selects Siemens's logo series of products, can arrange purge time and frequency by its panel button
Rate.In case, purging gas circuit is connected with double card bell and spigot joint using Φ 10 seamless steel pipe, to ensure air-tightness.Electromagnetic valve outlet gas source pipe
The BULKHEAD UNION on the right side of casing for the pass, anti-blocking sampler compressed air interface only need to be connected by scene with BULKHEAD UNION.
The beneficial effects of the utility model：This utility model can reduce the workload running meter attendant, according to not
Purge time and frequency are set with operating mode, to reach steady in a long-term, the reliability that flue gas pressures (differential pressure) measure.Two energising magnetic simultaneously
Valve is opened and is purged status signal and can transmit to DCS master control system, is formed chain with pressure feedback signal, keeps anti-when purging
Stifled sampler pressure signal value of feedback, purging terminates the collection of delay recovery anti-blocking sampler pressure value, it is to avoid purging is to pressure
The impact of interlock circuit.
Brief description
Fig. 1 is structural representation of the present utility model.
Specific embodiment
The blow valve port of Antichoking blast pressure sampler is connected with the output of this purging case gas piping, and between its connecting line
Setting needle valve, in order to overhaul, is opened pressure regulation filter, pressure is arranged on 0.2～0.4Mpa, suitable according to operating mode setting
Purging interval time and frequency, as larger in actual application dust content, then suitably shorten purge twice interval time with
Shi Zengjia purges frequency, and the purging frequency of pulsed contributes to the deashing in probe tube.
As illustrated, in figure：Purging control chamber 1, purging control casing 2, PLC 3, voltage stabilizing air accumulator 4, instrument pressure
The inlet end 5 of contracting air entrance voltage stabilizing air accumulator, air inlet non-return valve 6, Direct Action Type two three-way electromagnetic valve 7 are connected with purging air pipe
BULKHEAD UNION, purging air pipe is connected with double card bell and spigot joint using Φ 10 seamless steel pipe in control chamber, electromagnetic valve outlet source of the gas
Purging air pipe cause the BULKHEAD UNION 7 on the right side of casing and to take over control the blow valve port of stifled sampler be compressed air inlet；Can compile
Range controller control output end connects the control signal of two three-way electromagnetic valves.Compressed air for instrument enters the inlet end of voltage stabilizing air accumulator
4 pipelines are provided with pressure regulation filter.Pressure regulation filter can also be arranged on the outlet side pipeline of voltage stabilizing air accumulator.
The blow valve port of Antichoking blast pressure sampler is connected with the output of this purging case gas circuit, and pin is arranged on its connecting line
Type valve, in order to overhaul, is opened pressure regulation filter, pressure is arranged on 0.2～0.4Mpa, according to the suitable purging of operating mode setting
Interval time and frequency, as larger in actual application dust content, then PLC control parameter is adjusted：Suitably shortening purges twice
Increase purging frequency interval time, the control signal of Controlled by Programmable Controller output termination two three-way electromagnetic valves controls arteries and veins simultaneously
Rush (compressed air) purging of formula, (compressed air) purging of pulsed contributes to the deashing in probe tube.
Claims (2)
1. a kind of anti-blocking sampler pressure differential pressure of programmable flue gas purges control chamber, it is characterized in that including casing, PLC technology
Device, pressure regulation filter, voltage stabilizing air accumulator, two three-way electromagnetic valves, pressure regulation filter connects voltage stabilizing air accumulator, voltage stabilizing gas storage by pipeline
Direct Action Type two three-way electromagnetic valve is connect, in control chamber, purging air pipe adopts Φ 10 seamless steel pipe and double card on tank outlet purging air pipe
Bell and spigot joint connects, and the purging air pipe of two three-way electromagnetic valve outlets causes the BULKHEAD UNION of casing, and anti-blocking sampler pressure differential pressure is blown
Sweep and be connected with BULKHEAD UNION with compressed air interface；The control input of Controlled by Programmable Controller output termination two three-way electromagnetic valves
End.
2. purging control chamber according to claim 1, is characterized in that pressure regulation filter pressure is arranged on 0.2～0.4Mpa,
The capacity of voltage stabilizing air accumulator is 3L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620941081.XU CN205981740U (en) | 2016-08-25 | 2016-08-25 | Flue gas able to programme prevents that stifled sampler pressure differential pressure sweeps control box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620941081.XU CN205981740U (en) | 2016-08-25 | 2016-08-25 | Flue gas able to programme prevents that stifled sampler pressure differential pressure sweeps control box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205981740U true CN205981740U (en) | 2017-02-22 |
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| CN201620941081.XU Active CN205981740U (en) | 2016-08-25 | 2016-08-25 | Flue gas able to programme prevents that stifled sampler pressure differential pressure sweeps control box |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570497A (en) * | 2017-10-10 | 2018-01-12 | 冷猛 | A kind of unperturbed back-blowing device |
| CN111014193A (en) * | 2019-11-12 | 2020-04-17 | 攀钢集团攀枝花钢钒有限公司 | Cleaning method for blockage of flowmeter pressure taking device and pressure stabilizing input device thereof |
| CN114459840A (en) * | 2021-12-31 | 2022-05-10 | 天津津普利环保科技股份有限公司 | Intelligent diagnosis and protection system for gas sampling system and diagnosis and protection method thereof |
| CN115069693A (en) * | 2022-06-09 | 2022-09-20 | 华能重庆珞璜发电有限责任公司 | Anti-blocking purging system of coal-fired boiler acoustic temperature measurement equipment and using method |
-
2016
- 2016-08-25 CN CN201620941081.XU patent/CN205981740U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570497A (en) * | 2017-10-10 | 2018-01-12 | 冷猛 | A kind of unperturbed back-blowing device |
| CN111014193A (en) * | 2019-11-12 | 2020-04-17 | 攀钢集团攀枝花钢钒有限公司 | Cleaning method for blockage of flowmeter pressure taking device and pressure stabilizing input device thereof |
| CN114459840A (en) * | 2021-12-31 | 2022-05-10 | 天津津普利环保科技股份有限公司 | Intelligent diagnosis and protection system for gas sampling system and diagnosis and protection method thereof |
| CN115069693A (en) * | 2022-06-09 | 2022-09-20 | 华能重庆珞璜发电有限责任公司 | Anti-blocking purging system of coal-fired boiler acoustic temperature measurement equipment and using method |
| CN115069693B (en) * | 2022-06-09 | 2023-06-02 | 华能重庆珞璜发电有限责任公司 | Anti-blocking purging system of acoustic temperature measuring equipment of coal-fired boiler and use method |
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