本文選題：燒結(jié)余熱 + 回收��； 參考：《東北大學(xué)》2014年碩士論文

【摘要】：豎罐式回收是本研究團(tuán)隊(duì)借鑒CDQ提出的一種具有自主知識(shí)產(chǎn)權(quán)的燒結(jié)礦余熱高效回收工藝系統(tǒng),其核心單元設(shè)備之一——熱回收豎罐是將燒結(jié)礦顯熱轉(zhuǎn)換為熱載體即冷卻風(fēng)顯熱的關(guān)鍵設(shè)備。根據(jù)3類變量關(guān)系可知,余熱回收豎罐的進(jìn)口參數(shù),即燒結(jié)礦顯熱的品質(zhì)和數(shù)量,影響著豎罐的結(jié)構(gòu)和操作參數(shù),進(jìn)而影響著出口參數(shù),即熱載體的品質(zhì)和數(shù)量,進(jìn)而影響著后續(xù)的余熱發(fā)電量。基于此,本文開(kāi)展余熱回收豎罐的結(jié)構(gòu)形式、結(jié)構(gòu)參數(shù)和操作參數(shù)的初步探討,為后續(xù)罐式回收的技術(shù)攻關(guān)和工程設(shè)計(jì)打下良好的鋪墊。借鑒CDQ干熄爐結(jié)構(gòu),同時(shí)參考煉鐵高爐結(jié)構(gòu),初步研究并確定了豎罐的結(jié)構(gòu)形式；借鑒非流態(tài)化床氣固流動(dòng)與傳熱理論,采用解析方法,研究了豎罐的結(jié)構(gòu)和操作參數(shù),并初步確定了與360m2燒結(jié)機(jī)配套的余熱回收豎罐結(jié)構(gòu)參數(shù)和操作參數(shù)。主要研究結(jié)果如下：(1)確定了余熱回收豎罐的總體結(jié)構(gòu)形式,研究了包括豎罐本體、布料裝置、布風(fēng)裝置、排料裝置等關(guān)鍵零部件,在此基礎(chǔ)上采用PROE和CAD軟件繪制了罐體總裝圖及關(guān)鍵零部件圖；(2)影響豎罐內(nèi)氣固傳熱的熱工參數(shù)主要包括冷卻風(fēng)流量、罐體冷卻段高度及截面尺寸、進(jìn)口冷卻風(fēng)溫度等。在生產(chǎn)可調(diào)節(jié)范圍內(nèi),影響規(guī)律如下：1)增加冷卻段高度,冷卻風(fēng)出口溫度增加、燒結(jié)礦出口溫度降低,同時(shí)出口處冷卻風(fēng)所攜帶的(?)值增加,燒結(jié)礦層阻力損失明顯增大。2)增大罐體直徑,冷卻風(fēng)和燒結(jié)礦的出口溫度降低；不同直徑的炯峰值對(duì)應(yīng)的冷卻風(fēng)表觀流速不同,直徑越大,所對(duì)應(yīng)的表觀流速越小,燒結(jié)礦層阻力損失也越小。3)增大進(jìn)口冷卻風(fēng)溫度,燒結(jié)礦和冷卻風(fēng)的出口溫度增加,出口處冷卻風(fēng)所攜帶的(?)值增加。4)要保證出口處冷卻風(fēng)所攜帶的(?)值具有較大值,綜合以上分析所對(duì)應(yīng)的冷卻風(fēng)表觀流速范圍1.9～4.0 m/s。(3)對(duì)于國(guó)內(nèi)某360m2燒結(jié)機(jī),可配套一個(gè)或兩個(gè)豎罐。其中,配套一個(gè)豎罐的適宜熱工參數(shù)為：罐體冷卻段高度3.7 m、直徑9.6 m,冷卻風(fēng)進(jìn)口溫度60℃,冷卻風(fēng)流量62.5萬(wàn)m3/h；配套兩個(gè)豎罐的適宜熱工參數(shù)為：罐體冷卻段高度3.7m、直徑7.6m,冷卻風(fēng)進(jìn)口溫度70℃,冷卻風(fēng)流量31.0萬(wàn)m3/h。
[Abstract]:Vertical tank recovery is a kind of high efficiency recovery process system of sinter waste heat with independent intellectual property proposed by the research team based on CDQ. One of the core unit equipments, the heat recovery vertical tank, is the key equipment for converting the sensible heat of sinter into the heat carrier, that is, cooling wind sensible heat. According to three kinds of variable relations, the inlet parameters of waste heat recovery vertical tank, that is, the quality and quantity of sinter sensible heat, affect the structure and operation parameters of vertical tank, and then affect the export parameters, that is, the quality and quantity of heat carrier. This in turn affects the subsequent generation of residual heat. Based on this, the structural form, structure parameters and operation parameters of the vertical tank for waste heat recovery are discussed in this paper, which lays a good foundation for the technical research and engineering design of the follow-up tank recovery. With reference to the structure of CDQ dry quenching furnace and the structure of iron-making blast furnace, the structure form of vertical tank is preliminarily studied and determined, and the structure and operating parameters of vertical tank are studied by using the theory of gas-solid flow and heat transfer in non-fluidized bed, using analytical method. The structural parameters and operating parameters of the waste heat recovery vertical tank matched with 360m2 sintering machine were preliminarily determined. The main research results are as follows: (1) the overall structure of the waste heat recovery vertical tank is determined, and the key components including the vertical tank body, the distribution device, the air distribution device, the discharging device, and so on, are studied. On the basis of this, the main thermal parameters affecting the gas-solid heat transfer in the vertical tank are drawn by using Proe and CAD software. The main thermal parameters affecting the gas-solid heat transfer in the vertical tank include the cooling air flow rate, the height and section size of the cooling section of the tank, the inlet cooling air temperature, and so on. In the range of adjustable production, the influence law is as follows: 1) increase the height of cooling section, increase the outlet temperature of cooling air, decrease the temperature of sinter outlet, and at the same time, increase the temperature of cooling air at the outlet. The diameter of the tank increases and the outlet temperature of cooling wind and sinter decreases, and the apparent velocity of cooling air corresponding to the peak value of different diameters is different, the larger the diameter, the smaller the apparent velocity of flow. The smaller the resistance loss of sinter ore is. 3) the higher the inlet cooling air temperature is, the higher the outlet temperature of sinter and cooling wind is, and the cooling wind at the outlet is carrying.) Value increase. 4) to ensure the cooling air carried at the outlet) For a domestic 360m2 sintering machine, one or two vertical tanks can be fitted. The suitable thermal parameters of a vertical tank are as follows: the height of the cooling section of the tank is 3.7 m, the diameter is 9.6 m, and the inlet temperature of the cooling air is 60 鈩，

本文編號(hào)：2002350