PQ-A型粘结剂在锌精馏塔换热室的应用

简要介绍ＰＱ—Ａ型粘结剂的理化性能和磷酸铝盐的化学特性，我厂锌精馏塔换热室简形砖砌筑采用ＰＱ—Ａ型粘结剂调制的泥浆后，使用效果好，炉龄延长，经济效益显著。

3t/h窑式换热室热风冲天炉的应用体会

从韩国引进的3t/h窑式换热室外水冷热风冲天炉,使用普通的耐火材料修砌可以连续开炉24h以上。该炉热风温度达到400～420℃,铁液出炉温度在1550℃以上。本文着重介绍该炉的结构、性能、特点、修砌方法、熔化时应该注意的问题等。

太阳能辅助热泵空调机组室外侧换热器研究分析

以太阳能辅助热泵空调机组为例,对辅助换热器系统、切换式双热源系统和复合换热器系统进行了对比分析,从研究背景、系统设计、换热器设计、运行模式等方面,阐述了室外侧换热器的开发及应用。

高效节能换热立式热回收焦炉技术的开发与应用

利用高效节能换热立式热回收焦炉技术建设的7孔4.3 m热回收焦炉于2021年3月17日建成投产。经过不断调节优化,已逐步实现了稳定运行,预计年产焦炭可达5.5万t,中温中压蒸汽13.7万t,优于设计值。焦炭生产效率较同类型机焦炉提高10.3%。同时全炉负压操作,实现焦炭生产清洁高效、低成本的目标。

Characteristics of radiation and convection heat transfer in indirect near-infrared-ray heating chamber

Numerical study was performed to evaluate the characteristics of combined heat transfer of radiation, conduction and convection in indirect near infrared ray （N/R） heating chamber. The effects of important design parameters such as the shape of heat absorbing cylinder and heat releasing fin on the pressure drop and heat transfer coefficient were analyzed with different Reynolds numbers. The Reynolds numbers were varied from 103 to 3x106, which was defined based on the hydraulic diameter of the heat absorbing cylinder. Analyses were performed to obtain the inner and outer flow and the temperature distributions in the heat absorbing cylinder and the rates of radiation heat transfer and convection heat transfer. As the Reynolds number increases, the convection heat transfer rate is increased while the radiation heat transfer rate is decreased. The average convection heat transfer rate follows a power rule of the Reynolds number. Addition of three-dimensional heat releasing fin to the outside of the heat absorbing cylinder enhances the convection heat transfer.

Effect of different processing parameters on interfacial heat-transfer behavior in high-pressure die-casting process

Vacuum die casting can reduce the'air entrapment'phenomenon during casting process.Based on the temperature measurements at metal-die interface with different processing parameters,such as slow shot speed(VL),high shot speed(VH),pouring temperature(Tp)and initial die temperature(Tm),inverse method was developed to determine the interfacial heat transfer coefficient(IHTC).The results indicate that a closer contact between the casting and die could be achieved when the vacuum system is used.It is found that the vacuum could strongly increase the values of IHTC and decrease the grain size in castings.The IHTC could have a higher peak value with increasing the Tp from680to720℃or the VL from0.1to0.4m/s.In addition,the influence of the VH and Tm on IHTC could be negligible.

Thermo-chemical conversion of coal samples under high temperature

Exhaustion of profitable coal resources makes for need of innovation including underground coal gasification(UCG).One of the most important problems of UCG is evaluation of the combustion area in underground coal seams.Physicochemical parameters of coal,in a whole,and coal mineral substance are changed under heating and combusting.Thermo-chemical conversion of coal mineral components has an effect on magnetic characteristics of coal seam and can be used for real-time control of combusting area.To this guessing check laboratory experiments have been made as an activity of the Far Eastern Federal University.Our investigation based on a theoretical analysis and laboratory simulation tests.Typical results of the laboratory experiments are presented below.Under heating coal thermo-chemical magnetization is forming.Coal's magnetic parameters varieties from anti-ferromagnetiсto ferromagnetic.Anti-ferromagnetic pyrite and siderite presented into coal mass is transformed into magnetic hematite and magnetite under heating.Therefore,geomagnetic is expected to be a useful geophysical tool to for evaluation of combustion volume and its migration for underground coal gasification.

低温度乏风直接利用供热系统在新建煤矿的应用

新建煤矿生产前期乏风温度较低,矿井水水量很少无法利用,怎么解决冬季供热问题成为当务之急,低温度乏风如何利用成了研究的主要内容。以甘肃某新建煤矿为例,利用低温度乏风直接利用系统可解决生产前期大部分供热负荷需求,同时对该系统与燃煤锅炉进行运行费用对比分析,结果显示低温度乏风直接利用系统具有节能环保,无任何污染物排放的优势。