CN207263366U - A kind of automatic blowout device of flue gas pressures detection - Google Patents
A kind of automatic blowout device of flue gas pressures detection Download PDFInfo
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- CN207263366U CN207263366U CN201720907958.8U CN201720907958U CN207263366U CN 207263366 U CN207263366 U CN 207263366U CN 201720907958 U CN201720907958 U CN 201720907958U CN 207263366 U CN207263366 U CN 207263366U
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- guiding pipe
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Abstract
It the utility model is related to a kind of flue gas pressures detection automatic blowout device; structure is shut-off valve, three-way connection, pressure tapping, pressure transmitter in guard box; and pressure guiding pipe, scavenging conduit are introduced in guard box; one shut-off valve is installed on each path of three-way connection; scavenging conduit is connected by first shut-off valve with three-way connection; pressure guiding pipe is connected with three-way connection, and second shut-off valve is connected by pressure tapping with pressure transmitter, it is characterised in that：One three-way solenoid valve is installed in the first shut-off valve, three-way connection, pressure guiding pipe connecting place, three-way solenoid valve is connected with the first shut-off valve, three-way connection, pressure guiding pipe respectively, and three-way solenoid valve is controlled by PLC/DCS and opened or closed.The utility model can ensure pressure detecting accuracy, reduce labor strength, reduce compressed air consumption.Purging is convenient, can arbitrarily be selected in 0-30 seconds, and the time of cycle purge is arbitrarily set in PLC/DCS, without manual operation.
Description
Technical field：
When the utility model is related to the pressure detecting of boiler export flue gas or coal-fired sintering machine exiting flue gas, one kind of use
Can timing, automatic blowout device.
Background technology：
The flue gas pressures detection device of sintering plant or coal-burning boiler factory generally uses pressure transmitter, and coal-fired flue-gas pressure is
One important parameter, since smoke content is big, during pressure detecting, pressure guiding pipe uses a diameter of 14mm stainless steel tubes, ash
Dirt easily deposits or is adhered to impulse pipe surface, causes impulse blockage, it is easy to and cause pressure detecting to be not allowed, or without Faxian
Show the phenomenon of pressure value.If pressure guiding pipe is blocked, detection hypotony is caused, and pressure value and desulphurization system or sintering machine system
System interlocked control, need to promptly stop desulphurization system and sintering machine system, and flue gas can not outside be arranged and thereby result in unnecessary accident, to de-
Sulphur system and sintering machine normal operation bring certain influence.
Just because of the importance of pressure detecting, so when flue gas pressures detect, pressure detecting uses two from three, even if 1
There is exception in platform pressure detecting, does not influence the normal detection of pressure, currently used pressure detecting is exactly in desulfuration absorbing tower
Gas approach carries out flue gas pressures detection.To prevent dust stratification, dust accumulation during pressure detecting, the accuracy of pressure measurement is influenced,
The method the following two kinds method for the dedusting purging taken at present：
The first direct sweeping method, as shown in Figure 1, flue gas anti-block apparatus 1 is used between flue and pressure guiding pipe 3, and it is right
Flue gas anti-block apparatus 1 draw a scavenging conduit 2, by purging air to flue gas anti-block apparatus 1 carry out anti-clogging, pressure guiding pipe 3 according to
Secondary connection shut-off valve 4 and three-way connection 5 simultaneously enter the progress pressure detecting of pressure transmitter 6 by pressure tapping 7.Pressure guiding pipe 3
Flue gas anti-block apparatus 1 is used as previous, then flue gas anti-block apparatus 1 periodically can manually be purged with settlement treatment some dusts
Flue gas anti-block apparatus 1.By it was verified that as above method has the following disadvantages problem：
1st, impulse pipeline does not purge, and due to time integral, easily blocks；
2nd, manually purging has randomness, and labor intensity is big；
3rd, it is closer from flue at purging, it is not easy to manual operations.
Second method is as shown in Fig. 2, using dynamic pressure penalty method pressure detecting principle, which is moved using hydromechanical
Pressure compensation method, using method for continuous measuring, guarantee does not block；The device detects flue gas using uninterrupted sweeping method is continuously run
Pressure.Mitigate labor strength significantly.There are problems with：1st, due to compressed air, blow off is not swept, the compressed air of consumption
Amount is big, wastes big；2nd, during pressure stability, effect is obvious, and when pressure change is big, measurement error is big；3rd, first in use, being difficult to adjust
To suitable pressure, ensure pressure compensation in place.
The content of the invention：
The purpose of this utility model impulse blockage in order to prevent, ensures flue gas pressures measurement accuracy, there is provided Yi Zhongyan
Atmospheric pressure detects automatic blowout device, and the utility model is carried out by using the PLC/DCS in desulphurization system or sintering machine system
Control, prevents impulse blockage, ensures flue gas pressures measurement accuracy.Purging starts stopping can timing, purge time length
It can set, interlock automatic blowing, substantially reduce labor intensity, reduce compressed air purging usage amount.Power consumption is few, and usually
Not power consumption.
The utility model is realized using following technical solution：
A kind of flue gas pressures detect automatic blowout device, including pressure guiding pipe, scavenging conduit, three-way magnetic valve, shut-off valve, threeway
Connector, pressure tapping, pressure transmitter, PLC/DCS, guard box, shut-off valve, three-way connection, pressure tapping, pressure inverting
Device is installed in guard box, and pressure guiding pipe, scavenging conduit are introduced in guard box, and a cut-off is installed on each path of three-way connection
Valve, scavenging conduit are connected by first shut-off valve with three-way connection, and pressure guiding pipe is connected with three-way connection, and second shut-off valve passes through
Pressure tapping is connected with pressure transmitter, it is characterised in that：In the first shut-off valve, three-way connection, the installation of pressure guiding pipe connecting place
One three-way solenoid valve, three-way solenoid valve are connected with the first shut-off valve, three-way connection, pressure guiding pipe respectively, three-way solenoid valve by
PLC/DCS control on or off.
The three-way solenoid valve is two three-way solenoid valves of type of establishing by cable.
The utility model increases three-way solenoid valve, and three-way solenoid valve and existing PLC/ in pressure transmitter guard box
DCS is connected, and solenoid valve is selected and establishes type by cable, and when normally pressure is not required to purging during detection, solenoid valve leads to online without electricity, impulse pipeline
Detect pressure；Pressure detecting stops, it is necessary to when purging, and solenoid valves, compressed air line leads to, and compressed air purging pressure exists
0.4MPa-0.8MPa, more than flue gas pressures 0-5kPa, flue is blown back by dust stratification.When timing purges：Setting purging Qi Zhishi
Between, by the hour, automatic blowing is set by all, moon, according to the size of actual fume amount (flue specially has detection device), automatic interlock
Increase or decrease purge time length and number.During purging, cut-out pressure is chain；Extend 3 seconds after purging, recover pressure and connect
Lock.
The beneficial effects of the utility model are：It can ensure pressure detecting accuracy, reduce labor strength, reduce pressure
Contracting air consumption.Purging is convenient, can arbitrarily be selected in 0-30 seconds, and the time of cycle purge is arbitrarily set in PLC/DCS,
Without manual operation.Small investment, only increases a two-bit triplet solenoid valve, and PLC/DCS is existing control system, only increase by 1
DO points are used to connect three-way solenoid valve.
Brief description of the drawings
Fig. 1 is existing manual sweeping method principle schematic.
Fig. 2 is existing dynamic pressure penalty method pressure detecting schematic diagram.
Fig. 3 is the structure diagram of the utility model.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 3, a kind of flue gas pressures detection automatic blowout device, including pressure guiding pipe 3, scavenging conduit 2, three-way magnetic valve
8th, three shut-off valves 4, three-way connection 5, pressure tapping 7, pressure transmitter 6, PLC/DCS, guard box, three shut-off valves 4, three
Pass joint 5, pressure tapping 7, pressure transmitter 6 are installed in guard box, and pressure guiding pipe 3, scavenging conduit 2 are introduced in guard box,
One shut-off valve 4 is installed, scavenging conduit 2 is connected with three-way connection 5 by first shut-off valve, drawn on 5 each path of three-way connection
Pressure pipe 3 is connected with three-way connection 5, and second shut-off valve 4 is connected by pressure tapping 7 with pressure transmitter 6, its feature exists
In：The first shut-off valve 4, three-way connection 5,3 connecting place of pressure guiding pipe install a three-way solenoid valve 8, three-way solenoid valve 8 respectively with
First shut-off valve 4, three-way connection 5, pressure guiding pipe 3 connect, and three-way solenoid valve 8 is controlled by PLC/DCS and opened or closed.The electromagnetism three
Port valve is two three-way solenoid valves of type of establishing by cable.Pressure transmitter 6 is existing structure, and PLC/DCS is existing control system, is only increased
1 DO point is added to be used to connect three-way solenoid valve 8.
1st, the present apparatus is installed in instrument protecting box, and babinet is bent and is welded using stainless steel or cold-rolled steel sheet, cabinet type
Structure.Button fly front band observation window, there is tilting rain-proof head cover, and antispraying structure, energy rain-proof dust-proof, protection are used between door and babinet
Pressure transmitter mounting bracket is made of the installing pipe of moveable column and Φ 50mm in case, and guard box selects IP56.It is single
The size of guard box, 600x500x500 (wide x high x are deep), the quantity or actual change babinet ruler that size can be according to pressure transmitter
It is very little.There is the poling plate of dismounting on rear side of case, for installing various pipelines.Guard box bottom is connect with a certain number of plastic seals tool cable
Head, is used for introducing, picking out cable.General guard box is installed at inspection platform, is operated easy to inspection；
2nd, three-way magnetic valve and guard box supply in full sets, three-way magnetic valve select 24V, PLC/DCS to directly control, are not required to volume
Outer offer power supply, inlet air source can use hose, be easily installed；
3rd, it is simple to operate, it is not required to dismounting pipeline；Setting time can show last time purge time on PLC/DCS,
Purging remaining time next time.
Claims (2)
1. a kind of flue gas pressures detect automatic blowout device, including pressure guiding pipe, scavenging conduit, three-way magnetic valve, shut-off valve, three connect
Head, pressure tapping, pressure transmitter, PLC/DCS, guard box, shut-off valve, three-way connection, pressure tapping, pressure transmitter
In guard box, and pressure guiding pipe, scavenging conduit are introduced in guard box, and a shut-off valve is installed on each path of three-way connection,
Scavenging conduit is connected by first shut-off valve with three-way connection, and pressure guiding pipe is connected with three-way connection, and second shut-off valve passes through pressure
Power meter connector is connected with pressure transmitter, it is characterised in that：In the first shut-off valve, three-way connection, pressure guiding pipe connecting place installation one
A three-way solenoid valve, three-way solenoid valve are connected with the first shut-off valve, three-way connection, pressure guiding pipe respectively, and three-way solenoid valve is by PLC/
DCS control on or off.
A kind of 2. flue gas pressures detection automatic blowout device according to claim 1, it is characterised in that：The electromagnetism three
Port valve is two three-way solenoid valves of type of establishing by cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720907958.8U CN207263366U (en) | 2017-07-25 | 2017-07-25 | A kind of automatic blowout device of flue gas pressures detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720907958.8U CN207263366U (en) | 2017-07-25 | 2017-07-25 | A kind of automatic blowout device of flue gas pressures detection |
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| Publication Number | Publication Date |
|---|---|
| CN207263366U true CN207263366U (en) | 2018-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720907958.8U Active CN207263366U (en) | 2017-07-25 | 2017-07-25 | A kind of automatic blowout device of flue gas pressures detection |
Country Status (1)
| Country | Link |
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| CN (1) | CN207263366U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357809A (en) * | 2018-11-09 | 2019-02-19 | 中冶焦耐自动化有限公司 | A kind of coke oven bridge tube raw coke oven gas pressure-measuring system and method |
| CN109870591A (en) * | 2019-02-20 | 2019-06-11 | 华电电力科学研究院有限公司 | Tube cell wind velocity measurement system of intelligent blowing and sweeping type and its blowing method |
-
2017
- 2017-07-25 CN CN201720907958.8U patent/CN207263366U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357809A (en) * | 2018-11-09 | 2019-02-19 | 中冶焦耐自动化有限公司 | A kind of coke oven bridge tube raw coke oven gas pressure-measuring system and method |
| CN109870591A (en) * | 2019-02-20 | 2019-06-11 | 华电电力科学研究院有限公司 | Tube cell wind velocity measurement system of intelligent blowing and sweeping type and its blowing method |
| CN109870591B (en) * | 2019-02-20 | 2023-09-19 | 华电电力科学研究院有限公司 | Intelligent purging type primary powder tube wind speed measurement system and purging method thereof |
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