CN103185610A - Dust removing system pipe network resistance balance evaluation and debugging method - Google Patents
Dust removing system pipe network resistance balance evaluation and debugging method Download PDFInfo
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- CN103185610A CN103185610A CN2011104600612A CN201110460061A CN103185610A CN 103185610 A CN103185610 A CN 103185610A CN 2011104600612 A CN2011104600612 A CN 2011104600612A CN 201110460061 A CN201110460061 A CN 201110460061A CN 103185610 A CN103185610 A CN 103185610A
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Abstract
The invention discloses a dust removing system pipe network resistance balance evaluation and debugging method. Benchmarking comparison is conducted between dust removing system pipe network operating parameters and pipe network original design parameters on the basis of dust removing system pipe network operating parameter testing, so that evaluation is conducted on resistance balance condition of a dust removing system pipe network, and dust removing system pipe network resistance reaches balance again through field debugging of the dust removing system pipe network resistance, the fact that a dust removing system effectively trap and gather dust produced by all dust absorption points is guaranteed, and work environment is purified. The dust removing system pipe network resistance balance evaluation and debugging method not only provides reliable technical parameters and a theoretical basis for manufacturer removing system management and enables production run, management, maintenance and repair to be conducted with purposes, but also has a theoretical and practical guiding significance for dust removing system pipe network field debugging and major-medium maintenance and repairing. The dust removing system pipe network resistance balance evaluation and debugging method can guarantee the fact that the dust removing system pipe network operating parameters are adjusted under the circumstance that cost is low and production is not influenced, and enables the operating parameters to reach design demands. The problem which only can be solved through major maintenance and repairing to an original dust removing system is solved, and fund is saved.
Description
Technical field
The invention belongs to the environmental protection field, be assessment and the adjustment method of environmental protection facility, specifically be a kind of assessment and adjustment method of dust pelletizing system resistance of pipe system balance, assessment and debugging by dust pelletizing system resistance of pipe system balance, make the dust pelletizing system resistance of pipe system reach balance again, guarantee that dust pelletizing system captures the dust that each dust sucting point produces efficiently, purifies the post environment.
Background technology
Dust pelletizing system generally is made up of pipe network, fly-ash separator and blower fan.Pipe network is to determine dust pelletizing system to capture the key that can effect quality, post environmental quality up to standard.Pipeline is system smoothly, if the original design air quantity satisfies the dust catching needs, just can capture dust to greatest extent.
Large-scale dust pelletizing system pipe network, usually formed by main and some arms and each dust sucting point, though carried out resistance of pipe system EQUILIBRIUM CALCULATION FOR PROCESS (the resistance of pipe system EQUILIBRIUM CALCULATION FOR PROCESS adopts the pressure balance method) and field adjustable during system's initial designs, the resistance of pipe system of dust pelletizing system reaches balance.But through operation in a few years, owing to reasons such as relatively lagging behind of the inefficacy of the variation of practical condition, ageing equipment, control valve, maintenance management, cause the dust pelletizing system resistance of pipe system unbalance, some pipeline air quantity is excessive, wind speed is too high, and resistance increases, pipe wear; Some pipeline air quantity is too small, and wind speed is low excessively, the dust settling blocking pipe.The disorder of dust pelletizing system wind path, dust can not effectively be captured, post dust concentration severe overweight.[so-called pressure balance method is the supposition pipe flow speed, the inverse caliber, rated wind pressure loss is calculated main, supporting ring pipeline successively in the pressure balance rate (pressure balance rate=(major loop air loss-supporting ring transportation work style crushing loses)/major loop air loss) at sys node place.For cleaning shaft, the absolute value of pressure balance rate＜10% is qualified, otherwise readjusts design wind speed and caliber, till the balanced ratio of each sys node place blast meets the demands.】
For the problem that the dust pelletizing system pipe network occurs, common way is daily measures such as maintenance, maintenance and medium-capital overhauling transformation.Owing to do not carry out the assessment of dust pelletizing system resistance of pipe system balance, do not have theoretical foundation, so the dust pelletizing system pipe network goes wrong and usually thinks that dust pelletizing system design is unreasonable, deficiency in draught, the dust pelletizing system pipe network is redesigned, transforms, and this loses more than gain very much in fact.Because the construction of a cover dust pelletizing system often needs to invest hundreds of thousands to millions of, even more, only keep the newly-built several years good operation of dust pelletizing system, be far from being enough.Even the dust pelletizing system pipe network is transformed, the unbalance problem of resistance of pipe system also can appear in newly-built pipe network operation after a period of time, can not transform pipe network indefinitely.After carrying out the assessment of dust pelletizing system resistance of pipe system balance, find that many dust pelletizing system pipe networks are not the design existing problems, but the resistance of pipe system balance of dust pelletizing system is destroyed.At this moment only need according to resistance of pipe system balance assessment result, regulate resistance of pipe system, make dust sucting point reach design air flow, the dust pelletizing system resistance of pipe system reaches balance again.
As seen, make the dust pelletizing system pipe network smooth and easy, resistance balance, except daily maintenance, safeguard essential, regularly dust pelletizing system resistance of pipe system balance is assessed and debugging seems particularly important, but usually out in the cold in real work.At the dust pelletizing system resistance of pipe system field adjustable that carry out on dust pelletizing system resistance of pipe system assessment basis, can guarantee seldom drop into and do not influence under the situation of production, adjust dust pelletizing system resistance of pipe system operational factor, make it to reach designing requirement.
Summary of the invention
The object of the present invention is to provide a kind of assessment and adjustment method of dust pelletizing system resistance of pipe system balance, so that the dust pelletizing system resistance of pipe system reaches balance again, guarantee that dust pelletizing system captures the dust that each dust sucting point produces efficiently, purifies the post environment.
The object of the present invention is achieved like this: drawing the dust collecting process process flow diagram, be familiar with on the basis of dust collecting process and production technology and collecting dust-removing system pipe network original design parameter, dust pelletizing system pipe network operation parameter is tested, the dust pelletizing system pipe network operation parameter that records is carried out statistical study and processing, and carry out to mark relatively with the original design parameter of dust pelletizing system pipe network, and then dust pelletizing system resistance of pipe system balance is assessed.According to dust pelletizing system resistance of pipe system balance assessment result, carry out the field adjustable of dust pelletizing system resistance of pipe system balance, make the dust pelletizing system resistance of pipe system reach balance again.Concrete steps are as follows:
1) draw the dust collecting process process flow diagram, the concrete post of the composition of clear and definite dust pelletizing system and purification, and each main and dust sucting point arm be numbered;
2) be familiar with production technology and dust collecting process, confirm the duty of each dust sucting point of dust pelletizing system, the job order that mainly comprises each dust sucting point is to work simultaneously or alternation, and the flue-gas temperature of each dust sucting point is identical or difference;
3) the present invention is to serve as the assessment foundation with dust pelletizing system pipe network original design parameter to the assessment of resistance of pipe system balance.Therefore necessary collecting dust-removing system pipe network original design parameter mainly is diameter and the original design air quantity of each main and dust sucting point arm;
4) dust pelletizing system resistance of pipe system balance evaluate parameter test mainly comprises the test of the test of each main flue-gas temperature, flue gas pressures, flue gas flow and each dust sucting point arm flue-gas temperature, flue gas pressures, flue gas flow;
5) statistical study of dust pelletizing system pipe network operation parameter and processing mainly comprise the dust pelletizing system pipe network operation parameter of surveying are calculated, statistical study, handled and carry out air quantity stack;
6) dust pelletizing system resistance of pipe system balance assessment, because during the dust pelletizing system initial designs, all carried out the resistance of pipe system EQUILIBRIUM CALCULATION FOR PROCESS, dust pelletizing system pipe network original design parameter satisfies the requirement of resistance of pipe system balance, therefore, in the actual assessment process, only need actual motion air quantity and the original design air quantity of each dust sucting point are carried out to mark relatively.The air quantity calibration method is adopted in the assessment of dust pelletizing system resistance of pipe system balance, namely record the operation air quantity of each main and dust sucting point arm respectively and compare with its original design air quantity, when absolute value≤25% of the difference number percent of each dust sucting point actual motion air quantity and original design air quantity is balance, the number percent of the difference of dust sucting point actual motion air quantity and original design air quantity=(actual motion air quantity-original design air quantity)/original design air quantity; And calculate the unbalance factor of dust pelletizing system resistance of pipe system accordingly, and then dust pelletizing system resistance of pipe system balance is assessed the unbalanced dust sucting point quantity of resistance of pipe system unbalance factor=resistance/dust pelletizing system dust sucting point sum;
7) field adjustable of dust pelletizing system resistance of pipe system balance adopts air quantity to regulate method (valve regulated); Before the resistance of pipe system balance adjustment, the first blocking pipe of mediation pipe network, the shutoff pipeline that leaks out guarantees the most basic condition of work of dust pelletizing system, the dust pelletizing system resistance of pipe system is debugged generally from main, arrives the dust sucting point arm again.Regulate the valve opening of each main successively, make it to approach respectively design air flow separately; Regulate the valve opening on the dust sucting point arm more one by one; The main that air quantity is big or dust sucting point arm valve opening reduce, and the main that air quantity is little or dust sucting point arm valve opening increase, and test while regulating, and make it to approach respectively design air flow separately; Because each main of dust pelletizing system pipe network and dust sucting point arm resistance influence each other, can persuade some dishfuls all to become, therefore this is a process of regulating, testing repeatedly repeatedly, simultaneously will be according to the test result of each debugging, constantly adjust the debugging scheme, up to each dust sucting point operation air quantity and the absolute value of the difference number percent of original design air quantity equal≤25%, till the dust pelletizing system resistance of pipe system balance.
The inventive method has the following advantages:
The assessment of dust pelletizing system resistance of pipe system balance not only provides reliable technical parameter and theoretical foundation for the management of manufacturer's dust pelletizing system, production run, management, maintenance and maintenance are shot the arrow at the target more, also dust pelletizing system resistance of pipe system field adjustable and medium-capital overhauling transformation are had theoretical and actual directive significance simultaneously.
The dust pelletizing system resistance of pipe system balance field adjustable that carries out on dust pelletizing system resistance of pipe system balance assessment basis, can guarantee seldom drop into and do not influence under the situation of production, adjust dust pelletizing system pipe network operation parameter, make it to reach designing requirement, the dust pelletizing system resistance of pipe system reaches balance again, guarantee that dust pelletizing system captures the dust that each dust sucting point produces efficiently, purifies the post environment.Solve past dust pelletizing system pipe network and must pass through the problem that overhauling reform could solve, saved fund.
Description of drawings
Fig. 1 is dust pelletizing system resistance of pipe system balance estimation flow figure;
Fig. 2 is a common dust pelletizing system process chart.
Embodiment
Be described in further details below in conjunction with Fig. 1 and the inventive method of Fig. 2.
As shown in Figure 1:
Draw dust collecting process process flow diagram 1, be familiar with production technology and dust collecting process 2, on the basis of collecting dust-removing system pipe network original design parameter 3, dust pelletizing system resistance of pipe system operational factor is tested 4, dust pelletizing system pipe network operation parameter is carried out statistical study and handled 5, and carry out to mark relatively with the original design parameter 3 of dust pelletizing system pipe network, thereby the resistance balance situation of dust pelletizing system pipe network is assessed 6.According to dust pelletizing system resistance of pipe system balance assessment result, carry out the field adjustable 7 of dust pelletizing system resistance of pipe system balance, make the dust pelletizing system resistance of pipe system reach balance again, guarantee that dust pelletizing system captures the dust that each dust sucting point produces efficiently, purifies the post environment.
As shown in Figure 2:
Here be that example describes with a simple relatively dust pelletizing system process chart, this dust pelletizing system is formed (complicated dust pelletizing system dust sucting point reaches points up to a hundred) by 3 mains (A, B, C) and 12 dust sucting points.
Step 1: draw the dust collecting process process flow diagram, the composition of clear and definite dust pelletizing system and purify concrete post, and to each main A, B, C and dust sucting point arm be numbered 1,2,3...12.
Step 2: be familiar with production technology and dust collecting process, whether 12 dust sucting points work simultaneously, whether have the dust sucting point sequential working or by situation such as the mutual switch operating of valve; Whether flue-gas temperature is the same, and the flue-gas temperature that whether has dust sucting point to purify is higher; The purpose of being familiar with production technology and dust collecting process is to consider whether exhaust gas volumn that each dust sucting point is surveyed can directly superpose, and must be the dust sucting point of working simultaneously, and its exhaust gas volumn could superpose; Whether the flue gas state is consistent, if the dust sucting point flue-gas temperature difference that purifies then needs the air quantity under all unified conversion standard state, superposes again.
Step 3: collecting dust-removing system pipe network original design parameter mainly is the diameter of each main and dust sucting point arm and original design air quantity etc., so that next step carries out the mark assessment.
Step 4: dust pelletizing system pipe network operation parameter is tested, and test comprises the flue gas flow of each main and dust sucting point arm, flue-gas temperature, flue gas pressures content.
Step 5: the dust pelletizing system pipe network operation parameter of surveying is calculated, statistical study, handled and carry out air quantity stack etc., and result of calculation inserted in the table, for the ease of relatively, original design parameter and the pipe network operation parameter of dust pelletizing system pipe network are listed in the same table.Be the unit with A, B, each main of C at first respectively, test each main dust sucting point temperature, pressure, air quantity successively, it is listed in separately the form, and add up to design air flow and the operating mode airflow value of this main that superposes out in the hurdle at form.
Table 1 A main dust sucting point air quantity, pressure, temperature test tables of data
Table 2 B main dust sucting point air quantity, pressure, temperature test tables of data
Table 3 C main dust sucting point air quantity, pressure, temperature test tables of data
After the dust sucting point Wind Coverage Calculation of 3 main A, B, C is finished, test the actual motion air quantity of each main more respectively, test and result of calculation are listed in the form 4 successively, and add up to design air flow and the operating mode air quantity of this dust pelletizing system that superposes out in the hurdle at form.
To fly-ash separator entrance condition air quantity O
EntranceTest (seeing Table 5), verify the degree of agreement of itself and A, B, a C3 main air quantity sum, with the accuracy of validation test data.
The operating mode airflow value of A, B, each the dust sucting point stack of C main should be consistent with the operating mode air quantity that its corresponding A, B, C main record in theory, the operating mode airflow value of A, B, a C3 main stack should be consistent with fly-ash separator entrance condition air quantity, but actual conditions still have certain error, and impossible absolute is the same.If both differ greatly, should be the accuracy existing problems that have leak out situation or test data somewhere of pipeline, need further search reason or test again.
Each main pipe air quantity of table 4, pressure, temperature test tables of data
Table 5 fly-ash separator entrance air quantity examination tables of data
Step 6: actual motion air quantity and the original design air quantity of each dust sucting point of dust pelletizing system pipe network are carried out to mark relatively.Calculate the number percent of the difference of each dust sucting point actual motion air quantity and its original design air quantity respectively, the number percent of the difference of dust sucting point actual motion air quantity and original design air quantity=(actual motion air quantity-original design air quantity)/original design air quantity, absolute value≤25% of the difference number percent of dust sucting point actual motion air quantity and original design air quantity is balance (seeing Table 1,2,3).And then calculate the unbalance factor of dust pelletizing system resistance of pipe system, the unbalanced dust sucting point quantity of resistance of pipe system unbalance factor=resistance/dust pelletizing system dust sucting point sum (seeing Table 6), and then the resistance balance situation of dust pelletizing system pipe network assessed.
Table 6 dust pelletizing system resistance of pipe system EQUILIBRIUM CALCULATION FOR PROCESS table
Step 7: according to dust pelletizing system resistance of pipe system balance assessment result, carry out the field adjustable of dust pelletizing system resistance of pipe system balance.
Before resistance of pipe system debugging, at first dredge the blocking pipe of pipe network, the shutoff pipeline that leaks out guarantees the most basic condition of work of dust pelletizing system.
The field adjustable of resistance of pipe system balance adopts air quantity to regulate method (valve regulated).Dust pelletizing system resistance of pipe system debugging arrive the dust sucting point arm more generally from main, so the debugging of this dust pelletizing system pipe network is first regulates the valve opening of A, B, a C3 main respectively from A, B, a C3 main, makes it to approach respectively design air flow separately; Regulate the valve opening on dust sucting point 1,2, the 3...12 arm separately more one by one.The main that air quantity is big or dust sucting point arm valve opening reduce, and the main that air quantity is little or dust sucting point arm valve opening increase, and test while regulating, and make it to approach respectively design air flow separately; Because each main of dust pelletizing system pipe network and dust sucting point arm resistance influence each other, can persuade some dishfuls all to become, therefore this is a process of regulating, testing repeatedly repeatedly, simultaneously will be according to the test result of each debugging, constantly adjust the debugging scheme, up to each dust sucting point operation air quantity and the absolute value of the difference number percent of original design air quantity equal≤25%, till the dust pelletizing system resistance of pipe system balance.
Claims (1)
1. assessment and the adjustment method of a dust pelletizing system resistance of pipe system balance is characterized in that mainly may further comprise the steps:
1) draw the dust collecting process process flow diagram, the composition of clear and definite dust pelletizing system and purify concrete post is numbered each main and dust sucting point arm;
2) be familiar with production technology and dust collecting process, confirm the duty of each dust sucting point of dust pelletizing system, the job order that mainly comprises each dust sucting point is to work simultaneously or alternation, and the flue-gas temperature of each dust sucting point is identical or difference;
3) collecting dust-removing system pipe network original design parameter mainly is diameter and the original design air quantity of each main and dust sucting point arm;
4) dust pelletizing system pipe network operation parameter testing mainly comprises the test of the test of each main flue-gas temperature, flue gas pressures, flue gas flow and each dust sucting point arm flue-gas temperature, flue gas pressures, flue gas flow;
5) statistical study of dust pelletizing system pipe network operation parameter and processing mainly comprise the dust pelletizing system pipe network operation parameter of surveying are calculated, statistical study, handled and carry out air quantity stack;
6) dust pelletizing system resistance of pipe system balance assessment, actual motion air quantity and original design air quantity by each dust sucting point of dust pelletizing system pipe network carry out to mark relatively, calculate the number percent of the difference of each dust sucting point actual motion air quantity and original design air quantity respectively, the number percent of the difference of dust sucting point actual motion air quantity and original design air quantity=(actual motion air quantity-original design air quantity)/original design air quantity, the absolute value of the difference number percent of dust sucting point actual motion air quantity and original design air quantity≤25% is balance, and then the unbalance factor of calculating dust pelletizing system resistance of pipe system, the unbalanced dust sucting point quantity of resistance of pipe system unbalance factor=resistance/dust pelletizing system dust sucting point sum;
7) according to the assessment result of dust pelletizing system resistance of pipe system balance, carry out the field adjustable of dust pelletizing system resistance of pipe system balance, before the resistance of pipe system balance adjustment, the first blocking pipe of mediation pipe network, the shutoff pipeline that leaks out, guarantee the most basic condition of work of dust pelletizing system, the field adjustable of resistance of pipe system balance adopts air quantity to regulate method, and the dust pelletizing system resistance of pipe system is debugged from main, arrives the dust sucting point arm again, regulate the valve opening of each main at first successively, make it to approach respectively design air flow separately; Regulate the valve opening on the dust sucting point arm more one by one; The main that air quantity is big or dust sucting point arm valve opening reduce, the main that air quantity is little or dust sucting point arm valve opening increase, test while regulating, make it to approach respectively design air flow separately, up to each dust sucting point operation air quantity and the absolute value of the difference number percent of original design air quantity equal≤25%, till the dust pelletizing system resistance of pipe system balance.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105718631A (en) * | 2016-01-14 | 2016-06-29 | 江苏立典机床科技有限公司 | Numerical value simulation-based ventilation duct smoke purification system |
| CN108629115A (en) * | 2018-05-04 | 2018-10-09 | 安徽工业大学 | A kind of dedusting pipe network resistance balance method |
| CN109622549A (en) * | 2018-11-09 | 2019-04-16 | 西安建筑科技大学 | A method of improving volatile organic compounds collection system collection efficiency |
| CN114659206A (en) * | 2022-02-22 | 2022-06-24 | 中国核电工程有限公司 | Balance system capable of regulating and controlling resistance of iodine filter pipeline fan in real time |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105718631A (en) * | 2016-01-14 | 2016-06-29 | 江苏立典机床科技有限公司 | Numerical value simulation-based ventilation duct smoke purification system |
| CN108629115A (en) * | 2018-05-04 | 2018-10-09 | 安徽工业大学 | A kind of dedusting pipe network resistance balance method |
| CN109622549A (en) * | 2018-11-09 | 2019-04-16 | 西安建筑科技大学 | A method of improving volatile organic compounds collection system collection efficiency |
| CN109622549B (en) * | 2018-11-09 | 2020-09-25 | 西安建筑科技大学 | Method for improving collection efficiency of volatile organic compound waste gas collection system |
| CN114659206A (en) * | 2022-02-22 | 2022-06-24 | 中国核电工程有限公司 | Balance system capable of regulating and controlling resistance of iodine filter pipeline fan in real time |
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| CN103185610B (en) | 2015-07-15 |
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