動(dòng)力煤選煤廠商品煤質(zhì)量動(dòng)態(tài)控制系統(tǒng)設(shè)計(jì)的研究
發(fā)布時(shí)間：2018-10-14 13:14
【摘要】：動(dòng)力煤選煤廠洗選產(chǎn)品的配煤是選煤廠生產(chǎn)的一個(gè)重要環(huán)節(jié),同樣是選煤廠產(chǎn)品質(zhì)量控制的最后環(huán)節(jié),根據(jù)用戶訂單的產(chǎn)品灰分要求,利用選煤廠配煤系統(tǒng),從而達(dá)到提高動(dòng)力煤商品煤的品種多樣性和質(zhì)量穩(wěn)定率。 隨著煤質(zhì)的變差,采煤機(jī)械化程度的提高,末煤以及粗煤泥越來(lái)越多,大多數(shù)的動(dòng)力煤選煤廠選煤工藝多采用分級(jí)入選和配煤,為了達(dá)到用戶訂單的產(chǎn)品要求,一般采用產(chǎn)品倉(cāng)倉(cāng)下配煤,對(duì)于分級(jí)入選的末煤,采用一段時(shí)間洗選全部末煤,一段時(shí)間末煤全部進(jìn)倉(cāng)。實(shí)踐中往往會(huì)發(fā)現(xiàn)精煤倉(cāng)與末原煤倉(cāng)存在著配煤中的不平衡,即末原煤倉(cāng)里的原煤不夠用來(lái)與精煤進(jìn)行配煤,末原煤洗選的意義沒(méi)有達(dá)到反而增加了煤泥水處理的難度,提高了成本。 為了改變這種現(xiàn)狀,首先可以考慮將原煤進(jìn)行部分分級(jí)入選,另一部分直接進(jìn)入產(chǎn)品倉(cāng),最后與篩選之后的精煤進(jìn)行配煤。其次可以研制出一種新型的末煤分流裝置對(duì)分級(jí)入選的末煤進(jìn)行分流。通過(guò)對(duì)顧橋選煤廠原煤性質(zhì)進(jìn)行試驗(yàn)分析,利用分選設(shè)備的單機(jī)檢測(cè)結(jié)果及重選數(shù)學(xué)模型計(jì)算出分選結(jié)果,再通過(guò)對(duì)產(chǎn)品質(zhì)量反饋的結(jié)果計(jì)算末煤入洗量的多少,建立產(chǎn)品的數(shù)質(zhì)量與塊煤的分選結(jié)果、末煤分流量以及入洗末煤量、粗煤泥量之間的數(shù)學(xué)模型。在充分考慮了生產(chǎn)工藝和廠房空間位置后,對(duì)分流裝置進(jìn)行了重新設(shè)計(jì)改造,采用三通用平板閘門(mén),用液壓驅(qū)動(dòng),并裝有煤流分撒裝置,分別在兩分叉溜槽上安裝了液壓插板。針對(duì)顧橋選煤廠實(shí)際流程,利用RSview32組態(tài)軟件下開(kāi)發(fā)上位機(jī)畫(huà)面,同時(shí)與該廠使用的AB型PLC集中控制系統(tǒng)融為一體,利用控制溜槽中液壓插板的開(kāi)度,從而控制給煤量,給煤量是否符合要求,由電子皮帶秤在線測(cè)量,數(shù)據(jù)送入PLC,PLC根據(jù)數(shù)據(jù)模型進(jìn)行計(jì)算控制末煤的量,利用PID反饋控制末煤的量,前饋結(jié)合反饋控制,實(shí)現(xiàn)末煤洗選量的在線自動(dòng)控制。 動(dòng)力煤商品煤的質(zhì)量動(dòng)態(tài)控制系統(tǒng)的應(yīng)用能夠使末煤的分流量得到控制從而控制末煤的入洗量,實(shí)現(xiàn)讓其自動(dòng)加減的功能,相比于以前的洗選工藝,末煤入選量控制的更加合理,系統(tǒng)的穩(wěn)定性更高,同時(shí)體現(xiàn)了人文企業(yè)的標(biāo)準(zhǔn),減少了職工的勞動(dòng)強(qiáng)度。滿足各類不同用戶的要求,同時(shí)減少煤泥進(jìn)入洗選系統(tǒng),以降低洗選成本。更為重要的是,在當(dāng)前所處的經(jīng)濟(jì)條件以及環(huán)境下,該技術(shù)也不乏是煤炭行業(yè)有效的空氣污染控制技術(shù)。
[Abstract]:The coal blending of the preparation products of the thermal coal preparation plant is an important link in the production of the coal preparation plant, as well as the final link of the product quality control of the coal preparation plant. According to the requirements of the ash content of the product ordered by the user, the coal blending system of the coal preparation plant is used. Thus, the variety diversity and quality stability of commercial coal of thermal coal are improved. With the deterioration of coal quality and the improvement of mechanization degree of coal mining, there are more and more end coal and coarse coal slime. Most of the coal preparation processes in thermal coal preparation plants adopt classification selection and blending coal, in order to meet the requirements of the products ordered by users, General use of product silo coal blending, for the classification of the final coal, the use of a period of time to wash all the coal, a period of time all the end coal into the warehouse. In practice, it is often found that there is an imbalance in coal blending between the clean coal bunker and the final raw coal bunker, that is, the raw coal in the final coal bunker is not enough to be used for coal blending with the clean coal, and the significance of the final raw coal washing is not reaching to the point of increasing the difficulty of coal slurry water treatment. The cost has been raised. In order to change the present situation, the first part of the raw coal can be selected by partial classification, the other part directly into the product warehouse, and finally the coal blending with the selected clean coal. Secondly, a new type of pulverized coal separation device can be developed. Through the test and analysis of the raw coal properties of Guqiao Coal preparation Plant, the separation results are calculated by using the single machine test result of the separation equipment and the mathematical model of gravity separation, and the amount of the final coal washing quantity is calculated through the result of the product quality feedback. The mathematical models between the number and quality of product and the separation result of block coal, the flow rate of coal, the amount of coal washed in and the quantity of coarse coal slime are established. After fully considering the production process and the space position of the workshop, the splitter device was redesigned and reformed. Three universal flat gate gates, hydraulic drive, and coal flow distributor were installed on the two fork chute respectively. In view of the actual flow of Guqiao Coal preparation Plant, the upper computer screen is developed under the RSview32 configuration software. At the same time, it is integrated with the AB type PLC centralized control system used in the plant, and the opening degree of the hydraulic plug plate in the chute is controlled to control the coal supply. Whether the coal quantity meets the requirements is measured online by the electronic belt weigher, and the data is sent to PLC,PLC to calculate and control the quantity of the final coal according to the data model. The PID feedback is used to control the quantity of the final coal, and the feedforward control is combined with the feedback control. Realize the on-line automatic control of the final coal washing amount. The application of the quality dynamic control system of commercial coal of thermal power coal can control the flow rate of the coal to control the washing quantity of the coal, and realize the function of automatically adding and subtracting it, compared with the previous washing process, The system stability is higher, and the standard of humanistic enterprises is embodied, and the labor intensity of workers is reduced. To meet the requirements of different users and reduce the slime into the washing system to reduce the cost of washing. More importantly, in the current economic conditions and environment, this technology is also an effective air pollution control technology in the coal industry.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD94
本文編號(hào)：2270567
[Abstract]:The coal blending of the preparation products of the thermal coal preparation plant is an important link in the production of the coal preparation plant, as well as the final link of the product quality control of the coal preparation plant. According to the requirements of the ash content of the product ordered by the user, the coal blending system of the coal preparation plant is used. Thus, the variety diversity and quality stability of commercial coal of thermal coal are improved. With the deterioration of coal quality and the improvement of mechanization degree of coal mining, there are more and more end coal and coarse coal slime. Most of the coal preparation processes in thermal coal preparation plants adopt classification selection and blending coal, in order to meet the requirements of the products ordered by users, General use of product silo coal blending, for the classification of the final coal, the use of a period of time to wash all the coal, a period of time all the end coal into the warehouse. In practice, it is often found that there is an imbalance in coal blending between the clean coal bunker and the final raw coal bunker, that is, the raw coal in the final coal bunker is not enough to be used for coal blending with the clean coal, and the significance of the final raw coal washing is not reaching to the point of increasing the difficulty of coal slurry water treatment. The cost has been raised. In order to change the present situation, the first part of the raw coal can be selected by partial classification, the other part directly into the product warehouse, and finally the coal blending with the selected clean coal. Secondly, a new type of pulverized coal separation device can be developed. Through the test and analysis of the raw coal properties of Guqiao Coal preparation Plant, the separation results are calculated by using the single machine test result of the separation equipment and the mathematical model of gravity separation, and the amount of the final coal washing quantity is calculated through the result of the product quality feedback. The mathematical models between the number and quality of product and the separation result of block coal, the flow rate of coal, the amount of coal washed in and the quantity of coarse coal slime are established. After fully considering the production process and the space position of the workshop, the splitter device was redesigned and reformed. Three universal flat gate gates, hydraulic drive, and coal flow distributor were installed on the two fork chute respectively. In view of the actual flow of Guqiao Coal preparation Plant, the upper computer screen is developed under the RSview32 configuration software. At the same time, it is integrated with the AB type PLC centralized control system used in the plant, and the opening degree of the hydraulic plug plate in the chute is controlled to control the coal supply. Whether the coal quantity meets the requirements is measured online by the electronic belt weigher, and the data is sent to PLC,PLC to calculate and control the quantity of the final coal according to the data model. The PID feedback is used to control the quantity of the final coal, and the feedforward control is combined with the feedback control. Realize the on-line automatic control of the final coal washing amount. The application of the quality dynamic control system of commercial coal of thermal power coal can control the flow rate of the coal to control the washing quantity of the coal, and realize the function of automatically adding and subtracting it, compared with the previous washing process, The system stability is higher, and the standard of humanistic enterprises is embodied, and the labor intensity of workers is reduced. To meet the requirements of different users and reduce the slime into the washing system to reduce the cost of washing. More importantly, in the current economic conditions and environment, this technology is also an effective air pollution control technology in the coal industry.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD94
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