CN103256825B - Method for monitoring cement production soot emission and waste heat power generation system soot emission - Google Patents
Method for monitoring cement production soot emission and waste heat power generation system soot emission Download PDFInfo
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- CN103256825B CN103256825B CN201310198832.4A CN201310198832A CN103256825B CN 103256825 B CN103256825 B CN 103256825B CN 201310198832 A CN201310198832 A CN 201310198832A CN 103256825 B CN103256825 B CN 103256825B
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Abstract
The invention discloses a method for monitoring cement production soot emission and waste heat power generation system soot emission, and belongs to the technical field of industrial soot emission monitoring. The method for monitoring the cement production soot emission and the waste heat power generation system soot emission is characterized by comprising the steps of after soot passes through a soot collector, transmitting soot quantity which is not caught to a center control computer located in a central control room through distributed control computers according to soot quantity sensors installed at measuring points of a cement production field, comparing the soot quantity which is not caught with a threshold value under cement production and waste heat power generation working conditions, judging whether the soot quantity which is not caught reaches the standard or not, and if the soot quantity which is not caught exceeds the standard, sending control commands to the distributed control computer located on the measuring point by the center control computer until the soot quantity which is not caught reaches the standard. When industrial waste is co-processed by a cement furnace, the control threshold value is improved by 10%. According to the method for monitoring the cement production soot emission and the waste heat power generation system soot emission, production greenization of a cement factory can be ensured, and harmonization of a production environment when the waste heat power generation system and the cement furnace co-process the waste can also be considered.
Description
Technical field
The invention belongs to industrial fumes emission monitoring technical field, be specifically related to the monitoring method of manufacture of cement and afterheat generating system soot emissions.
Background technology
The invention discloses the monitoring method of manufacture of cement and afterheat generating system soot emissions, belong to industrial fumes emission monitoring technical field.
The flue dust in cement plant refers in dore furnace, rotary kiln due to the solid particle that high-temp combustion produces together with raw material or aerosols such as bunker coals.In traditional cement production process, the emission source of flue dust is mainly kiln hood, kiln tail, generally at this two place, deduster is installed and is reduced discharging flue dust, to the limit value being up to state standards to smoke discharge amount.But; part large-scale cement enterprise of China has been not content with the minimum requirements being up to state standards now; these cement producers start to have some changes; by the enterprise being subject to implementation environment safeguard measure under environmental administration's supervision; reduce discharging, progressively coordinate the pollution-free industry of melting altogether with natural environment and develop into initiatively, and some local provinces and cities are for the granular material discharged limit value 50mg/Nm of cement kiln production equipment
3stricter requirement has been proposed.And cogeneration technology is applied in cement plant mostly at present, this technology utilizes the waste heat of kiln hood, kiln tail gas independently to generate electricity, and the dust concentration of kiln hood, kiln tail gas can not be too high.And, when the cooperative disposal trade waste of cement plant, also may increase soot emissions.Therefore, in manufacture of cement especially between clinker car in due to decomposition of limestone, clinker burning and burning of coal, and afterheat generating system and the flue dust that produces carries out Monitoring and Controlling, is the eager requirement of cement plant modern management.Manufacture of cement and afterheat generating system soot emissions are carried out to Real-Time Monitoring, and record stores the data of central control room computer at any time, can be used as pollutant emission monitored data files, and data are carried out contrasting between vertical and horizontal, can also serve as the part reflection cement kiln operating condition of the record of production, the fume amount discharging during to cement kiln production system cooperative disposal trade waste is analyzed, according to actual production conditions, equipment performance and knowhow setting threshold, carry out grading control, dedusting, not only environmental protection, can also ensure cement stabilizing production, improve the observation data of associated treatment trade waste and ensure that afterheat generating system normally moves.
Summary of the invention
The invention is characterized in, by be arranged in CCR of Cement Plant central control computer, be positioned at on-the-spot distributed flue dust control computer and be positioned at the flue dust collecting of on-the-spot all soot emissions points, collective and distributive type manufacture of cement and the afterheat generating system that flue gas is measured and waste heat utilization equipment form jointly, monitor according to following steps realization successively:
Step (1), collective and distributive type manufacture of cement of structure and afterheat generating system, comprising:
Central control computer,
Be positioned at the on-the-spot distributed control computer with flue dust control function, fume amount at large after the process dust-precipitator at described central control computer output on-the-spot each soot emissions point waste gas outlet place, and
Be arranged on the dust-precipitator of following soot emissions point: cement kiln kiln hood waste gas outlet, cement kiln tail waste gas outlet, expansion chamber, SP waste gas outlet, AQC waste gas outlet, SP bypassed exhaust gas pipe outlet and AQC bypassed exhaust gas pipe outlet,
Wherein:
SP is the waste heat boiler of setting up on waste gas flue between cement kiln tail waste gas outlet and chimney, and establishes bypassed exhaust gas pipeline at waste heat boiler SP,
AQC is the waste heat boiler of setting up before cement kiln kiln hood, and establishes bypassed exhaust gas pipeline at waste heat boiler AQC,
Before kiln hood waste heat boiler AQC, increase and build an expansion chamber,
Be arranged on the online continuous flue gas analyzer at following each waste gas outlet place, fume amount at large after the process dust-precipitator at each self-corresponding distributed control computer export measuring point place in scene: cement kiln kiln hood waste gas outlet, cement kiln tail waste gas outlet, SP waste gas outlet, AQC waste gas outlet, expansion chamber outlet, SP bypassed exhaust gas pipe outlet and AQC bypassed exhaust gas pipe outlet;
Step (2), system initialization, in described central control computer:
Set: fume amount PM at large and threshold value thereof after the process dust-precipitator at each soot emissions point waste gas outlet place, get the dust concentration mean value of one-period T=1 hour as each PM value, unit is " mg/Nm
3",
Cement kiln kiln hood waste gas outlet fume amount PM
outlet≤ 45,
Cement kiln tail waste gas outlet fume amount PM
inlet≤ 35,
Expansion chamber outlet fume amount PM
drop≤ 25,
SP waste gas outlet fume amount PM
sP≤ 25,
AQC waste gas outlet fume amount PM
aQC≤ 25,
SP bypassed exhaust gas pipe outlet fume amount PM
sP, by≤ 30,
AQC bypassed exhaust gas pipe outlet fume amount PM
aQC, by≤ 30;
Fume amount PM at large after the process dust-precipitator at the each soot emissions point waste gas outlet place in step (3), on-the-spot each distributed control computer real-time acquisition step (2), and output in central control computer;
Step (4), central control computer are differentiated:
If: when manufacture of cement, cement kiln does not have cooperative disposal trade waste, control by the threshold value of each fume amount step (2) Suo Shu,
If: when manufacture of cement, cement kiln cooperative disposal trade waste, is no more than 10% adjustment threshold value by the threshold value floating that exceeds the described each fume amount of step (2) and controls;
Step (5), for the each on-the-spot measuring point that exceeds described fume amount, send alarm, and control by the distrbuted control computer at place, till fume amount PM drops to below corresponding threshold value, and complete the detecting & monitoring of corresponding logic control, parameters of technique process
CSRC level is established some policer operations station, and function comprises:
The image demonstration of relevant device operation and running status,
The real-time demonstration of fume amount PM,
The history that the data of fume amount PM laterally, longitudinally contrast and the demonstration of tendency chart,
Mark when fume amount PM exceeds threshold range when cement kiln production system cooperative disposal trade waste,
Coarse adjustment, fine setting parameter and correction,
The demonstration of alarm condition and control result,
Under afterheat generating system abnormal running, close the mark of frequency.
Effect of the present invention is:
(1) collective and distributive type control system of the central control computer in the present invention has the function of data acquisition, supervision, warning, help cement plant to change the on-line automaticization management becoming more meticulous, the situation of accurate measurement cement plant discharge flue dust into from extensive management.
(2) manufacture of cement and afterheat generating system soot emissions are carried out to Real-Time Monitoring, and record stores the data of central control room computer at any time, can be used as pollutant emission monitored data and file, can also serve as the part reflection cement kiln operating condition of the record of production.
(3) fume amount discharging when the present invention is to cement kiln production system cooperative disposal trade waste is analyzed, according to actual production conditions, equipment performance and knowhow setting threshold, carry out distributed control dedusting, not only environmental protection, can also ensure cement stabilizing production, improve the observation data of associated treatment trade waste and ensure that afterheat generating system normally moves.
Brief description of the drawings
Fig. 1 is the monitoring system programme diagram of manufacture of cement of the present invention and afterheat generating system soot emissions.
Detailed description of the invention
Below according to Fig. 1 of Figure of description, and embodiment further explains to this invention.
As shown in Figure 1, the invention is characterized in, by the central control computer that is positioned at CCR of Cement Plant, be positioned at on-the-spot distributed flue dust control computer and be positioned at the flue dust collecting of on-the-spot all soot emissions points, in flue gas is measured and waste heat utilization equipment forms jointly DCS collective and distributive type manufacture of cement and afterheat generating system, to between clinker car due to decomposition of limestone, clinker burning and burning of coal and the flue dust that produces are monitored, there is decentralised control at the scene, the function of central control computer centralized management, monitor according to following steps realization successively:
Step (1), collective and distributive type manufacture of cement of structure and afterheat generating system, comprising:
Central control computer,
Be positioned at the on-the-spot distributed control computer with flue dust control function, fume amount at large after the process dust-precipitator at described central control computer output on-the-spot each soot emissions point waste gas outlet place, and
Be arranged on the dust-precipitator of following soot emissions point: cement kiln kiln hood waste gas outlet, cement kiln tail waste gas outlet, expansion chamber, SP waste gas outlet, AQC waste gas outlet, SP bypassed exhaust gas pipe outlet and AQC bypassed exhaust gas pipe outlet,
Wherein:
SP is the waste heat boiler of setting up on waste gas flue between cement kiln tail waste gas outlet and chimney, and establishes bypassed exhaust gas pipeline at waste heat boiler SP,
AQC is the waste heat boiler of setting up before cement kiln kiln hood, and establishes bypassed exhaust gas pipeline at waste heat boiler AQC,
Before kiln hood waste heat boiler AQC, increase and build an expansion chamber,
Be arranged on the online continuous flue gas analyzer at following each waste gas outlet place, fume amount at large after the process dust-precipitator at each self-corresponding distributed control computer export measuring point place in scene: cement kiln kiln hood waste gas outlet, cement kiln tail waste gas outlet, SP waste gas outlet, AQC waste gas outlet, expansion chamber outlet, SP bypassed exhaust gas pipe outlet and AQC bypassed exhaust gas pipe outlet
Step (2), system initialization, in described central control computer:
Set: fume amount PM at large and threshold value thereof after the process dust-precipitator at each soot emissions point waste gas outlet place, get the dust concentration mean value of one-period T=1 hour as each PM value, unit is " mg/Nm
3",
Cement kiln kiln hood waste gas outlet fume amount PM
outlet≤ 45,
Cement kiln tail waste gas outlet fume amount PM
inlet≤ 35,
Expansion chamber outlet fume amount PM
drop≤ 25,
SP waste gas outlet fume amount PM
sP≤ 25,
AQC waste gas outlet fume amount PM
aQC≤ 25,
SP bypassed exhaust gas pipe outlet fume amount PM
sP, by≤ 30,
AQC bypassed exhaust gas pipe outlet fume amount PM
aQC, by≤ 30;
Fume amount PM at large after the process dust-precipitator at the each soot emissions point waste gas outlet place in step (3), on-the-spot each distributed control computer real-time acquisition step (2), and output in central control computer;
Step (4), central control computer are differentiated:
If: when manufacture of cement, cement kiln does not have cooperative disposal trade waste, control by the threshold value of each fume amount step (2) Suo Shu,
If: when manufacture of cement, cement kiln cooperative disposal trade waste, is no more than 10% adjustment threshold value by the threshold value floating that exceeds the described each fume amount of step (2) and controls;
Step (5), for the each on-the-spot measuring point that exceeds described fume amount, send alarm, and control by the distrbuted control computer at place, till fume amount PM drops to below corresponding threshold value, and complete the detecting & monitoring of corresponding logic control, parameters of technique process
CSRC level is established some policer operations station, and function comprises:
The image demonstration of relevant device operation and running status,
The real-time demonstration of fume amount PM,
The history that the data of fume amount PM laterally, longitudinally contrast and the demonstration of tendency chart,
Mark when fume amount PM exceeds threshold range when cement kiln production system cooperative disposal trade waste,
Coarse adjustment, fine setting parameter and correction,
The demonstration of alarm condition and control result,
Under afterheat generating system abnormal running, close the mark of frequency.
The monitoring system of manufacture of cement and afterheat generating system soot emissions initializes, and starts to monitor.
Through 1 hour, be arranged in the average fume amount at the each waste gas outlet of the control computer screen display place of central control room, unit is with " mg/Nm
3" meter,
Kiln hood waste gas outlet fume amount PM
outlet=55,
Kiln tail gas outlet fume amount PM
inlet=35,
Expansion chamber outlet fume amount PM
drop=25,
SP waste gas outlet fume amount PM
sP=25,
AQC waste gas outlet fume amount PM
aQC=25,
SP bypassed exhaust gas pipe outlet fume amount PM
sP, by=30,
AQC bypassed exhaust gas pipe outlet fume amount PM
aQC, by=30.
PM
outletexceed threshold value, system enters alarm condition, and field level controls, until remove fault, middle control computer screen display control result.
Proceed monitoring, through 1 hour, be arranged in the average fume amount at the each waste gas outlet of the control computer screen display place of central control room, unit is with " mg/Nm
3" meter, record:
Kiln hood waste gas outlet fume amount PM
outlet=45,
Kiln tail gas outlet fume amount PM
inlet=35,
Expansion chamber outlet fume amount PM
drop=150,
SP waste gas outlet fume amount PM
sP=80,
AQC waste gas outlet fume amount PM
aQC=75,
SP bypassed exhaust gas pipe outlet fume amount PM
sP, by=30,
AQC bypassed exhaust gas pipe outlet fume amount PM
aQC, by=30.
PM
drop, PM
sP, PM
aQCexceed threshold value, system enters alarm condition, and level is controlled at the scene, stops in time the operation of afterheat generating system, middle control computer screen display control result, and this cement production system running status carried out to mark.
Proceed monitoring, at this moment cement kiln production system starts cooperative disposal gangue, the PM threshold value floating 10% of system.
The average fume amount that is arranged in the each waste gas outlet of the control computer screen display place of central control room, unit is with " mg/Nm
3" meter, record:
Kiln hood waste gas outlet fume amount PM
outlet=45,
Kiln tail gas outlet fume amount PM
inlet=35,
Expansion chamber outlet fume amount PM
drop=27,
SP waste gas outlet fume amount PM
sP=20,
AQC waste gas outlet fume amount PM
aQC=15,
SP bypassed exhaust gas pipe outlet fume amount PM
sP, by=32,
AQC bypassed exhaust gas pipe outlet fume amount PM
aQC, by=31.
Monitoring variable is and exceedes threshold value, returns and continues monitoring.
Through one month, recalled the data of fume amount PM by system, make history and tendency chart.
Longitudinal data comprises the average fume amount at the each waste gas outlet of each measurement period place, contrasts by analysis historigram, confirms the higher soot emissions source of discharge capacity,
Laterally data comprise the average fume amount of the each measurement period in each soot emissions source, contrast by analysis historigram, and make tendency chart, the situation that fume amount PM is exceeded to threshold value is carried out mark, recalled by system that relevant device operates and the record of manufacture of cement running status, file as the analytic record to manufacture of cement.
Record under afterheat generating system abnormal running and close frequency, as weighing one of index of the normal operation of afterheat generating system.
The independent record of fume amount PM during to cement kiln production system cooperative disposal trade waste, the situation that exceedes threshold value is carried out to mark, recalled treating capacity and the source of cooperative disposal trade waste by system, as the analytic record of manufacture of cement cooperative disposal trade waste is filed.
Claims (1)
1. the monitoring method of manufacture of cement and afterheat generating system soot emissions, it is characterized in that, by be arranged in CCR of Cement Plant central control computer, be positioned at on-the-spot distributed flue dust control computer and be positioned at the flue dust collecting of on-the-spot all soot emissions points, collective and distributive type manufacture of cement and the afterheat generating system that flue gas is measured and waste heat utilization equipment form jointly, monitor according to following steps realization successively:
Step (1), collective and distributive type manufacture of cement of structure and afterheat generating system, comprising:
Central control computer,
Be positioned at the on-the-spot distributed control computer with flue dust control function, fume amount at large after the process dust-precipitator at described central control computer output on-the-spot each soot emissions point waste gas outlet place, and
Be arranged on the dust-precipitator of following soot emissions point: cement kiln kiln hood waste gas outlet, cement kiln tail waste gas outlet, expansion chamber, SP waste gas outlet, AQC waste gas outlet, SP bypassed exhaust gas pipe outlet and AQC bypassed exhaust gas pipe outlet,
Wherein:
SP is the waste heat boiler of setting up on waste gas flue between cement kiln tail waste gas outlet and chimney, and establishes bypassed exhaust gas pipeline at waste heat boiler SP,
AQC is the waste heat boiler of setting up before cement kiln kiln hood, and establishes bypassed exhaust gas pipeline at waste heat boiler AQC,
Before kiln hood waste heat boiler AQC, increase and build an expansion chamber,
Be arranged on the online continuous flue gas analyzer at following each waste gas outlet place, fume amount at large after the process dust-precipitator at each self-corresponding distributed control computer export measuring point place in scene: cement kiln kiln hood waste gas outlet, cement kiln tail waste gas outlet, SP waste gas outlet, AQC waste gas outlet, expansion chamber outlet, SP bypassed exhaust gas pipe outlet and AQC bypassed exhaust gas pipe outlet;
Step (2), system initialization, in described central control computer:
Set: fume amount PM at large and threshold value thereof after the process dust-precipitator at each soot emissions point waste gas outlet place, get the dust concentration mean value of one-period T=1 hour as each PM value, unit is " mg/Nm
3",
Cement kiln kiln hood waste gas outlet fume amount PM
outlet≤ 45,
Cement kiln tail waste gas outlet fume amount PM
inlet≤ 35,
Expansion chamber outlet fume amount PM
drop≤ 25,
SP waste gas outlet fume amount PM
sP≤ 25,
AQC waste gas outlet fume amount PM
aQC≤ 25,
SP bypassed exhaust gas pipe outlet fume amount PM
sP, by≤ 30,
AQC bypassed exhaust gas pipe outlet fume amount PM
aQC, by≤ 30;
Fume amount PM at large after the process dust-precipitator at the each soot emissions point waste gas outlet place in step (3), on-the-spot each distributed control computer real-time acquisition step (2), and output in central control computer;
Step (4), central control computer are differentiated:
If: when manufacture of cement, cement kiln does not have cooperative disposal trade waste, control by the threshold value of each fume amount step (2) Suo Shu,
If: when manufacture of cement, cement kiln cooperative disposal trade waste, is no more than 10% adjustment threshold value by the threshold value floating that exceeds the described each fume amount of step (2) and controls;
Step (5), for the each on-the-spot measuring point that exceeds described fume amount, send alarm, and control by the distrbuted control computer at place, until fume amount PM drop to corresponding threshold value following till.
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| CN104836375A (en) * | 2015-05-15 | 2015-08-12 | 成都中冶节能环保工程有限公司 | Alarm type coke oven waste heat power generation system based on voltage stabilizing power supply circuit |
| CN105320819B (en) * | 2015-11-30 | 2018-04-03 | 中国能源建设集团广东省电力设计研究院有限公司 | Emission Concentration of Boiller Dust measuring method and system |
| CN107025774A (en) * | 2017-06-08 | 2017-08-08 | 铜山华润电力有限公司 | A kind of dynamic alerts environmental protection index alarm method and device |
| CN111552251A (en) * | 2020-05-15 | 2020-08-18 | 中材海外工程有限公司 | Remote monitoring system for emission detection of chimney of cement plant |
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