CN103196710B - Anti-blocking CEMS sampling system - Google Patents
Anti-blocking CEMS sampling system Download PDFInfo
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- CN103196710B CN103196710B CN201310080294.9A CN201310080294A CN103196710B CN 103196710 B CN103196710 B CN 103196710B CN 201310080294 A CN201310080294 A CN 201310080294A CN 103196710 B CN103196710 B CN 103196710B
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Abstract
The invention discloses an anti-blocking CEMS sampling system, comprising a main control cabinet, a control box and a sampler for collecting gas. A system controller controls the work of each solenoid valve, pneumatic valve, reversing valve, and jet pump, and the work of a heating system inside a heating box to achieve sampling and back flushing, and the switch of a plurality of functions of tracing pipe washing back flushing.
Description
Technical field
the present invention relates to CEMS flue gas discharge continuous monitoring system field, be specially a kind of anti-blocking CEMS sampling system.
Background technology
CEMS flue gas discharge continuous monitoring system is used for the fields such as electric power, Industrial Boiler, metallurgy, chemical industry, cement, industry incineration and carries out pollutant emission monitoring, the multinomial correlation parameters such as monitoring SO2, NOX, O2, dust concentration, flue-gas temperature, pressure, flow velocity, humidity, and add up emission index, total emission volumn etc., thus pollutant emission is control effectively.First the measurement of flue gas pollutant is use sampling probe to carry out fume extraction sampling to flue gas, flue gas imports analysis room's rack into through trace pipe, air chamber is entered after series of preprocessing, gas analyzer is used to analyze and measurement of concetration gas, original CEMS sampling system is simple extraction sample gas, just pressurized air blowback is carried out to sampling probe, do not carry out trace pipe blowback and washing, when trace pipe because fault occurs that cold spot or sampling probe internal fault easily result in blockage, thus cause whole measurement data inaccurate, and add maintenance cost.
Summary of the invention
The object of this invention is to provide a kind of anti-blocking CEMS sampling system, to solve prior art Problems existing.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of anti-blocking CEMS sampling system, comprise the sampling thief of master control cabinet, control box and collection gas, it is characterized in that: in described sampling thief box body, a Pneumatic valve is equipped with in sample outlet lower end, the valve inlet of sampler samples outlet access Pneumatic valve, the valve outlet port of Pneumatic valve connects trace pipe and tap water pipe line by three-way connection, the trace pipe other end passes into the heating cabinet air chamber arranged in master control cabinet, realizes systematic sampling, blowback and water cleaning function by Pneumatic valve gas control.
Described control box is made up of a pair solenoid valve, the valve inlet of one of them solenoid valve is by pipeline access pressurized air and valve outlet port accesses the valve outlet port of Pneumatic valve by pipeline bypass, and the valve inlet of another solenoid valve accesses the valve outlet port of Pneumatic valve by pipeline bypass and described solenoid valve valve outlet port is set to freeing port;
Heating cabinet is provided with in described master control cabinet, three groups of solenoid valves, air chamber is provided with in described heating cabinet, the electric control reversing valve of T-valve structure, ejector and over-flow chamber, the trace pipe described in confession that enters of described over-flow chamber accesses, the outlet of over-flow chamber is communicated with by one of them valve port of pipeline and reversal valve, the light entrance port of described air chamber, difference incoming fiber optic in optical emission exit, the sample gas inlet of air chamber is communicated with by another valve port of pipeline and reversal valve, the sample gas outlet of air chamber is communicated with the entrance of ejector by pipeline, ejector also has exhausr port, exhausr port on ejector extends to outside master control cabinet by gas outlet, in three groups of solenoid valves in the outer master control cabinet of heating cabinet, wherein the valve inlet of two solenoid valves is combined into a road access pressurized air by pipeline, access the valve outlet port of one of them solenoid valve in compressed-air actuated two solenoid valves by jet delivery side of pump in pipeline access heating cabinet, access the valve outlet port of another solenoid valve in compressed-air actuated two solenoid valves by last valve port of reversal valve in pipeline access heating cabinet, the valve inlet of last solenoid valve in the outer master control cabinet of heating cabinet accesses tap water by pipeline, and valve outlet port is by last valve port of pipeline bypass access reversal valve.
The anti-blocking CEMS sampling system of described one, is characterized in that: described heating cabinet is made up of the in-built electric hot plate of the casing with warming plate interlayer, in heating cabinet, electric hot plate power end is connected to temperature switch, is also provided with PT100 temperature sensor in heating cabinet.
The anti-blocking CEMS sampling system of described one, it is characterized in that: in master control cabinet, system controller is set, the opening and closing work of Pneumatic valve SV6, each solenoid valve SV1, SV2, SV3, SV5, SV7, reversal valve SV4, ejector JM is controlled by system controller, in heating cabinet PT100 temperature sensor temperature signal line connecting system controller in, the break-make of temperature switch is also controlled by system controller.
The anti-blocking CEMS sampling system of described one, is characterized in that: described over-flow chamber is that the chamber of metal material is formed.
The present invention can carry out sampling automatically, blowback, and trace pipe washing blowback, efficiently solves the susceptible to plugging problem of trace pipe, substantially increase work efficiency, the serviceable life of the instrument that improve, reduce the cost of manual maintenance.
Accompanying drawing explanation
Fig. 1 is the gas circuit structure schematic diagram of present system.
Fig. 2 is solenoid control sequential process flow diagram of the present invention.
Embodiment
As shown in Figure 1.A kind of anti-blocking CEMS sampling system, comprise the sampling thief of master control cabinet, control box and collection gas, in described sampling thief box body, a Pneumatic valve is equipped with in sample outlet lower end, the valve inlet of sampler samples outlet access Pneumatic valve, the valve outlet port of Pneumatic valve connects trace pipe and tap water pipe line by three-way connection, the trace pipe other end passes into the heating cabinet air chamber arranged in master control cabinet, realizes systematic sampling, blowback and water cleaning function by Pneumatic valve gas control.Control box is made up of a pair solenoid valve SV5, SV7, the valve inlet of one of them solenoid valve SV5 is by pipeline access pressurized air and valve outlet port accesses the valve outlet port of Pneumatic valve SV6 by pipeline bypass, and the valve inlet of another solenoid valve SV7 accesses the valve outlet port of Pneumatic valve SV6 by pipeline bypass and solenoid valve SV7 valve outlet port is set to freeing port;
Heating cabinet is provided with in master control cabinet, three groups of solenoid valve SV1, SV2, SV3, air chamber AP is provided with in heating cabinet, the electric control reversing valve SV4 of T-valve structure, ejector JM and over-flow chamber LP, over-flow chamber LP enters the access of confession trace pipe, the outlet of over-flow chamber LP is communicated with one of them valve port of reversal valve SV4 by pipeline, the light entrance port of air chamber AP, difference incoming fiber optic F1 in optical emission exit, F2, the sample gas inlet of air chamber AP is communicated with another valve port of reversal valve SV4 by pipeline, the sample gas outlet of air chamber AP is communicated with by the entrance of pipeline with ejector JM, ejector JM also has exhausr port, exhausr port on ejector JM extends to outside master control cabinet by gas outlet, three groups of solenoid valve SV1 in the outer master control cabinet of heating cabinet, SV2, in SV3, wherein two solenoid valve SV1, the valve inlet of SV2 is combined into a road access pressurized air by pipeline, access the outlet of valve outlet port by ejector JM in pipeline access heating cabinet of one of them solenoid valve SV1 in compressed-air actuated two solenoid valves, access the valve outlet port of another solenoid valve SV2 in compressed-air actuated two solenoid valves by last valve port of reversal valve SV4 in pipeline access heating cabinet, the valve inlet of last solenoid valve SV3 in the outer master control cabinet of heating cabinet accesses tap water by pipeline, and valve outlet port is by last valve port of pipeline bypass access reversal valve SV4.
Heating cabinet is made up of the in-built electric hot plate of the casing with warming plate interlayer, in heating cabinet, electric hot plate power end is connected to temperature switch, is also provided with PT100 temperature sensor in heating cabinet.
In master control cabinet, system controller is set, the opening and closing work of Pneumatic valve SV6, each solenoid valve SV1, SV2, SV3, SV5, SV7, reversal valve SV4, ejector JM is controlled by system controller, in heating cabinet PT100 temperature sensor temperature signal line connecting system controller in, the break-make of temperature switch is also controlled by system controller.
Over-flow chamber LP is that the chamber of metal material is formed.
The present invention rotates forward reversion control reversal valve by software-driven motor and carries out sampling and blowback.When sampling, reversal valve SV4 goes to sampling location, opens solenoid valve SV1, SV5, opens Pneumatic valve SV6 and ejector JM respectively, simultaneously shut electromagnetic valve SV2, SV3 and SV7.When blowback, shut electromagnetic valve SV1, SV5, Pneumatic valve SV6, reversal valve SV4 forwards blowback position to, open shut electromagnetic valve SV2, SV3, SV7 chronologically, first pass into quantitative tap water, shut electromagnetic valve SV3, open solenoid valve SV2 again and pass into 1 minute pressurized air, this action of repetitive operation more than 5 times, is passed into by the timesharing of the unlatching sequential control water and air of Controlling solenoid valve, carries out blowback and the washing of trace pipe.
The present invention is handled the pneumatic element be distributed in each subsystem by the system controller be loaded in master control cabinet: Pneumatic valve, solenoid valve and be positioned at heating system, reversal valve, the ejector of heating cabinet of master control cabinet, thus realize fume extraction sampling, the pre-service of sample gas constant temperature, trace pipe timesharing carry out pressurized air blowback and water automatic cleaning function.
Present system is sampled and trace pipe blowback interval by software control sample gas, turns to sample states or blowback state by the automatically controlled switching valve SV4 of software control.Control timing sequence is as follows:
One, pressurized air blowback
1, initial samples state: SV1, SV5, SV6 open, and SV4 is positioned at sampling location, SV2, SV3, SV7 close.
2, pressurized air blowback prepares: close SV1, SV4 and forward blowback position to.
3, blowback: open SV2, continues 2 seconds, closes SV2, continues 10S, 5 times repeatedly.
4, sample states is returned, the valve state of recovering step 1.
Two, blowback is washed
1, initial samples state: SV1, SV5, SV6 open, and SV4 is positioned at sampling location, SV2, SV3, SV7 close.
2, washing heat transfer pipeline prepares: close SV1, SV5, SV6, SV4 and forward blowback position to, open SV2, SV7, closes trace pipe heating.Last till that trace pipe cools to after below 80 degree and close SV2.
3, blowback washing: open SV3, continues 2 seconds, closes SV3, opens SV2, continues one minute, closes SV2, repeatedly several times.
4, sample states is recovered: open trace pipe heating, open SV2, trace pipe temperature return is to sample temperature by the time, the valve state of recovering step 1.
Claims (2)
1. an anti-blocking CEMS sampling system, comprise the sampling thief of master control cabinet, control box and collection gas, it is characterized in that: in described sampling thief box body, a Pneumatic valve is equipped with in sample outlet lower end, the valve inlet of sampler samples outlet access Pneumatic valve, the valve outlet port of Pneumatic valve connects trace pipe and tap water pipe line by three-way connection, the trace pipe other end passes into the heating cabinet air chamber established in master control cabinet, realizes systematic sampling, blowback and water cleaning function by Pneumatic valve gas control;
Described control box is made up of a pair solenoid valve, the valve inlet of one of them solenoid valve is by pipeline access pressurized air and valve outlet port accesses the valve outlet port of Pneumatic valve by pipeline bypass, and the valve inlet of another solenoid valve accesses the valve outlet port of Pneumatic valve by pipeline bypass and described solenoid valve valve outlet port is set to freeing port;
Heating cabinet is provided with in described master control cabinet, three groups of solenoid valves, air chamber is provided with in described heating cabinet, the electric control reversing valve of T-valve structure, ejector and over-flow chamber, the trace pipe described in confession that enters of described over-flow chamber accesses, the outlet of over-flow chamber is communicated with by one of them valve port of pipeline and reversal valve, the light entrance port of described air chamber, difference incoming fiber optic in optical emission exit, the sample gas inlet of air chamber is communicated with by another valve port of pipeline and reversal valve, the sample gas outlet of air chamber is communicated with the entrance of ejector by pipeline, ejector also has exhausr port, exhausr port on ejector extends to outside master control cabinet by gas outlet, in three groups of solenoid valves in the outer master control cabinet of heating cabinet, wherein the valve inlet of two solenoid valves is combined into a road access pressurized air by pipeline, access the valve outlet port of one of them solenoid valve in compressed-air actuated two solenoid valves by jet delivery side of pump in pipeline access heating cabinet, access the valve outlet port of another solenoid valve in compressed-air actuated two solenoid valves by last valve port of reversal valve in pipeline access heating cabinet, the valve inlet of last solenoid valve in the outer master control cabinet of heating cabinet accesses tap water by pipeline, and valve outlet port is by last valve port of pipeline bypass access reversal valve,
Described heating cabinet is made up of the in-built electric hot plate of the casing with warming plate interlayer, in heating cabinet, electric hot plate power end is connected to temperature switch, is also provided with PT100 temperature sensor in heating cabinet; Also system controller is provided with in master control cabinet, the opening and closing work of Pneumatic valve SV6, each solenoid valve SV1, SV2, SV3, SV5, SV7, reversal valve SV4, ejector JM is controlled by system controller, in heating cabinet PT100 temperature sensor temperature signal line connecting system controller in, the break-make of temperature switch is also controlled by system controller;
This system is sampled and trace pipe blowback interval by software control sample gas, turns to sample states or blowback state by the automatically controlled switching valve SV4 of software control; Control timing sequence is as follows:
One, pressurized air blowback
(1), initial samples state: SV1, SV5, SV6 open, and SV4 is positioned at sampling location, and SV2, SV3, SV7 close;
(2), pressurized air blowback prepares: close SV1, SV4 and forward blowback position to;
(3), blowback: open SV2, continue 2 seconds, close SV2, continue 10S, 5 times repeatedly;
(4), sample states is returned, the valve state of recovering step (1);
Two, blowback is washed
1), initial samples state: SV1, SV5, SV6 open, and SV4 is positioned at sampling location, and SV2, SV3, SV7 close;
2), washing heat transfer pipeline prepares: close SV1, SV5, SV6, SV4 and forward blowback position to, open SV2, SV7, close trace pipe heating;
Last till that trace pipe cools to after below 80 degree and close SV2;
3), blowback washing: open SV3, continue 2 seconds, close SV3, open SV2, continue a minute, close SV2, repeatedly several times;
4), recover sample states: open trace pipe heating, open SV2, by the time trace pipe temperature return is to sample temperature, recovering step 1) valve state.
2. the anti-blocking CEMS sampling system of one according to claim 1, is characterized in that: described over-flow chamber is that the chamber of metal material is formed.
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| CN201310080294.9A CN103196710B (en) | 2013-03-13 | 2013-03-13 | Anti-blocking CEMS sampling system |
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| CN201310080294.9A CN103196710B (en) | 2013-03-13 | 2013-03-13 | Anti-blocking CEMS sampling system |
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| CN103196710B true CN103196710B (en) | 2015-05-13 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103913545B (en) * | 2014-03-25 | 2017-01-18 | 安徽皖仪科技股份有限公司 | Novel CEMS (Continuous Emission Monitoring System) heating box system |
| CN115615954A (en) * | 2022-12-20 | 2023-01-17 | 合肥金星智控科技股份有限公司 | TDLAS-based ammonia gas online monitoring assembly, monitoring system and monitoring method |
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| US7698074B1 (en) * | 2006-11-16 | 2010-04-13 | Michael Cybulski | Emission monitoring methods and systems |
| CN101498629A (en) * | 2008-02-01 | 2009-08-05 | 宇星科技发展(深圳)有限公司 | Smoke sampling probe |
| CN101577989A (en) * | 2008-05-08 | 2009-11-11 | 于�玲 | Self-control thermostatic electric heating insulated board |
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Address after: High tech Zone Wenqu 230088 Hefei Road, Anhui province No. 8 Patentee after: ANHUI WANYI SCIENCE & TECHNOLOGY Co.,Ltd. Address before: Tianda high tech Zone 230088 Hefei Road, Anhui province No. 71 Huayi Science Park building B building Anhui instrument Patentee before: ANHUI WANYI SCIENCE & TECHNOLOGY Co.,Ltd. |