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Multi-gas and multi-pipe cycle sampling control method
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A control method and multi-pipeline technology, applied in electrical program control, program control in sequence/logic controllers, etc., can solve problems such as low production efficiency, inability to sample, analyze and monitor, and lack of scalability. The effect of automation level, improving monitoring efficiency and humanized operation
Active Publication Date: 2016-12-07
BAOSHAN IRON & STEEL CO LTD
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[0004] ①Coal tank gas content monitoring is carried out through 4 gas sampling pipelines, and the gas content value of the pipeline can only be monitored after manual selection, and the automatic cycle sampling operation of the gas content of all pipelines cannot be realized, which is not conducive to the realization of sampling operation automation, which is not conducive to the continuity of production operations and low production efficiency
[0005] ② The sampling operation of the four gas sampling pipelines is manually completed by the central control operator. Considering the complexity and changeability of the process production process, stable and safe operating conditions and prerequisites are required, and each sampling pipeline does not have a sampling device. Fixed time limit, strong randomness, is not conducive to the timely detection of hidden faults by central control operators
[0006] ③ The sampling and monitoring of gas content in the coal tank is only carried out for one kind of gas, which is not scalable, especially after the process conditions change, it is necessary to sample and monitor the content of other types of gas
However, the current sampling method has limitations, and it cannot be sampled, analyzed and monitored in the case of multiple gases and multiple pipelines
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example 1
[0024] There are 7 coal tanks in the raw material storage and transportation system, namely: B235B01, B235B02, B235B04, B235B05, B235B06, B235B07, B235B08. Among them, coal tanks B235B01 and B235B02 share a sampling pipeline C1, coal tanks B235B04 and B235B05 share a sampling pipeline C2, coal tanks B235B06 and B235B07 share a sampling pipeline C3, and coal tank B235B08 uses a sampling pipeline C4.
[0025] In the PCS7 system program, the newly added program modules and setting parameters are as follows: the system group module GROUP, the timer TIMER_P, the sampling time is set to 90 seconds, the accumulator CTUD is initially set to 1, and the cyclic sampling process follows the sampling pipeline C1 / The cycle sampling sequence of C2 / C3 / C4 / C1 is carried out, and the sampling gas components include CO, CO2, CH4. The system works stably and safely.
example 2
[0027] There are 5 coal tanks in the pulverized coal bunker of the coal line, namely: 185B01, 185B02, 185B03, 185B04, 185B05. The sampling pipelines are respectively C21, C22, C23, C24, and C25.
[0028] In the PCS7 system program, the newly added program modules and setting parameters are as follows: system group module GROUP1, timer TIMER_P1, sampling time is set to 30 seconds, accumulator CTUD1 is initially set to 3, and the cycle sampling process follows the sampling pipeline C23 / The cycle sampling sequence of C24 / C25 / C21 / C22 is carried out, and the sampling gas components include CO, CO2, H2S. The system works stably and safely.
[0029] The invention provides a multi-gas and multi-pipeline circulation sampling control system and a control method, which are applicable to all raw material storage and transportation processes and equipment involving multi-gas circulation sampling control in multi-material bins (tanks).
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Abstract
The invention provides a multi-gas multi-pipeline circulating sampling control system and control method. The control system comprises a multi-component gas analysis instrument, a system set module, an accumulator module, a comparator module, a timer module T and a sampling time t setting module. While multi-pipeline circulating sampling is carried out, the multi-component gas analysis instrument works in real time, the system set module can track sampling fault alarming information of each pipeline, content state display of each sampled gas and the like in real time, and the information can be displayed on a center control chamber monitoring image in real time. According to the control system and method, by means of program logic processing and circulating scanning, sampling cycle time and circulating sampling pipelines are set variably, accordingly, on-site process conditions are met, the automatic level of multi-gas multi-pipeline circulating sampling control is improved, material chamber parameter monitoring efficiency is effectively improved, and the occurrence probability of material chamber safety accidents is substantially reduced.
Description
technical field [0001] The invention relates to a control method for the storage and transportation process of smelting reduction smelting raw materials, in particular to an electrical automatic control method for smelting reduction smelting raw material storage and transportation. Background technique [0002] There are 7 coal tanks in the existing coal tank storage, transportation and feeding system. Considering factors such as equipment purchase costs and future daily maintenance costs, one set of sampling and analysis equipment (such as infrared gas analyzers) was installed on the top of the coal tank to sample and analyze the gas content of the seven coal tanks. There is 1 gas sampling point on the top of each coal trough, a total of 7 gas sampling points, of which 6 gas sampling points are combined into one sampling line in groups of two, and a total of 4 sampling lines are arranged in this way. After the collected sample gas is purified and dried, its gas content is ...
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