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JB/T 8942-2016 氩提取设备 Argon recovery plants
本标准规定了空气分离设备中氩提取设备的产品类型和型号、技术要求、试验方法、检验规则、标志、包装、运输和贮存。 本标准适用于以空气为原料，采用低温法生产气体产品的空气分离设备（以下简称空分设备）中提取氩气产量大于或等于10m<sup>3</sup>/h的氩提取设备。 注1：本标准中的压力未注明者为表压，加上“(A)”为绝压。 注2：本标准中氩气产量均为标准状态，即0°C、101.325kPa(A）状态下的气体量，单位为立方米每小时（m<sup>3</sup>/h)...
2024-01-09 04:00:02浏览：5
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YS/T 787-2012赤泥中精选高铁砂技术规范Recovery of iron ore from red mud
本标准规定了赤泥回收铁砂的要求、试验方法、检验规则及质量证明书等。<br>本标准适用于拜耳法氧化铝生产工艺所得赤泥回收工业原料用铁砂。...
2022-06-13 15:44:03浏览：38
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Use of ionic liquid in leaching process of brass wastes for copper and zinc recovery
Brass ash from the industrial brass manufacturer in Turkey was leached using the solutions of ionic liquid (IL) 1-butyl-3-methyl-imi-dazolium hydrogen sulfate ([bmim]HSO4) at ambient pressure in the presence of hydrogen peroxide (H2O2) and potassium peroxymonosulfate (oxone) as the oxidants. Parameters affecting leaching efficiency, such as dissolution time, IL concentration, and oxidizing agent addition, were investigated. The results show that [bmim]HSO4 is an efficient IL for the brass ash leaching, providing the dissolution efficiencies of 99%for Zn and 24.82%for Cu at a concentration of 50vol%[bmim]HSO4 in the aqueous solution without any oxidant. However, more than 99%of zinc and 82%of copper are leached by the addition of 50vol%H2O2 to the [bmim]HSO4 solution. Nevertheless, the oxone does not show the promising oxidant behavior in leaching using [bmim]HSO4....
2020-11-22 17:58:37浏览：61
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Commercial Application of the RAR Sulfur Recovery and Tail Gas Treating Process
The 40kt/a sulfur recovery unit for tail gas treating applying the reduction-absorption-recycling (RAR) technology is aimed at regeneration of the rich amine solution and recovery of sulfur to operate in tandem with the 1.2Mt/a diesel hydrofining unit. The process unit calibration data have revealed that the recovery of total sulfur reaches 99.86%, which is 6.65 percentage points higher than that before application of the RAR technology. The SO2 content in vented tail gas is 0.27 t/d, which is much less than the latest emission standard prescribed by the State. The factors that can affect the unit operation have been analyzed and corresponding measures have been suggested including the necessity to improve the control over the reaction temperature in the tail gas hydrogenation unit....
2020-09-15 12:28:59浏览：63
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Low gas-liquid ratio foam flooding for conventional heavy oil
The recovery of heavy oil by water flooding is 10％ lower than that of conventional crude oil,so enhanced oil recovery (EOR) is of great significance for heavy oil.In this paper,foam flooding with a gas-liquid ratio (GLR) of 0.2:1 for the Zhuangxi heavy oil (325 mPa.s at 55 ℃) was performed on cores,sand packs and plate model.In sand pack tests,polymer enhanced foam flooding increased oil recovery by 39.8％,which was 11.4％ higher than that for alkali/surfactant/polymer (ASP) flooding under the same conditions.Polymer enhanced foam flooding in plate models shows that the low GLR foam flooding increased oil recovery by about 30％,even when the extended water flooding was finished at 90％ water cut.Moreover,it was discovered by microscopy that foam was more stable in heavy oil than in light oil.These results confirm that low GLR foam flooding is a promising technology for displacing conventional heavy oil....
2020-09-13 23:35:02浏览：60
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Affecting Factors and Improving Measures for Converter Gas Recovery
To change the undesirable present situation of recovering and using converter gas in steel plants in China,the basic approaches to improving the converter gas recovery rate were analyzed theoretically along with the change curves of the converter gas component content, based on the converter gas recovery system of Baosteel No. 2 steelmaking plant. The effects of converter device, raw material, air imbibed quantity, recovery restricted condition, and intensity of oxygen blowing on the converter gas recovery rate were studied. Among these, the effects of the air imbibed quantity, recovery restricted condition, and intensity of oxygen blowing are remarkable. Comprehensive measures were put forward for improving the converter gas recovery from the point of devices, etc. , and good results were achieved....
2020-09-13 23:35:02浏览：68
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节能改造在医院的应用
对广东省人民医院整体能源使用情况进行了分析,并对其热水系统、空调系统、采暖系统等进行一系列节能改造,通过改造前后对比从而明确节能的重要性和必要性.整体节能改造实现了对医院能源系统的整体优化,达到了较好的社会效益与经济效益.对医院能源系统的整体优化与节能改造具有一定的指导和借鉴意义....
2020-09-13 23:35:02浏览：31
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排风隔热窗的热工性能分析
研究一种新型的建筑外窗结构———排风隔热窗，其由3层普通白玻璃、内置的遮阳百叶及玻璃之间的气流空腔构成。排风隔热窗是将室内空调排风通过玻璃间的气流空腔排到室外，利用空调排风低品位的冷量/热量减少外窗在供冷/供热季时形成的空调负荷，达到排风热回收的效果，同时它可以根据供冷/供热季的不同切换其排风通道。通过建立传热数学模型，对该结构和2种常规外窗结构在典型夏热冬冷气候条件下的节能效果进行分析比较。结果表明，排风隔热窗可以有效地降低室内侧玻璃表面与室内空气之间的温差，减少外窗形成的室内负荷，改善室内的热舒适性。...
2020-09-02 20:01:33浏览：32
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煤气化污水酚氨回收技术进展、流程优化及应用
介绍了国内煤气化污水酚氨回收的3种化工处理流程:(1)脱酸、再萃取脱酚、而后脱氨及溶剂回收工艺;(2)脱酸脱氨后、萃取脱酚及溶剂回收工艺;(3)酸化后萃取脱酚、再脱酸脱氨及溶剂回收工艺.并对这3种工艺流程进行了分析对比,前两种工艺流程已有大量工业实例,第3种工艺仍停留在研发阶段.工艺过程换热网络优化与集成、新型萃取剂的开发是今后煤气化污水技术的研发重点....
2020-07-10 14:39:05浏览：148
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Suitable retention and recovery technology of floor coal at ends of fully mechanized face with great
Gateways at faces of great mining heights are mostly driven along the roof of coal seams. For gateway height restrictions, a 1-3 m floor coal is retained, leaving a triangular floor coal at the face ends, causing a loss of coal. In order to improve coal recovery rates and to ensure efficiency of equipment at coal mining faces, we investigated suitable retention methods and recovery technology of floor coal at face ends. The upper floor coal can directly be recovered by a shearer with floor dinting. The lower floor coal is recovered by shearer with floor dinting after advanced floor dinting and retaining a step for protecting coal sides in a haulage gateway. Field practice shows that this method can improve the coal recovery rates at fully mechanized working faces with great mining heights....
2020-06-12 16:19:27浏览：1401
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Technical Measures and Selections for Reducing Flue Gas Heat Loss of Large Coal-Fired Boilers
The main technologies for reducing flue gas heat loss of pulverized coal-fired boilers are introduced,and the suitability of these technologies for boiler operation and the principles for selection of these technologies are explored.The main conclusions are:1) the non-equilibrium control over flue gas flow rates at the inlet of the air heater and the reversal rotation of the air heater rotator should be popularized as regular technologies in large boilers; 2) increasing the area of the air heater to reduce the flue gas heat loss in pulverized coal-fired boilers should be the top option and increasing the area of the economizer be the next choice; 3) lowpressure economizer technology could save energy under special conditions and should be compared with the technology of increasing economizer area in terms of techincal economics when the latter is feasible; 4) the hot primary air heater is only suitable to the pulverizing system with a large amount of cold air mixed....
2020-06-12 16:19:11浏览：1397
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Extracting vanadium from stone-coal by oxygen pressure acid leaching and solvent extraction
Vanadium extraction from stone-coal was investigated by oxygen pressure acid leaching and solvent extraction. The mineralogy of the stone-coal from Tongren City of Guizhou Province, China, was investigated by various determination methods. The effects of leaching time, leaching temperature, leaching agent concentration, leaching L/S ratio, granularity of material, additive consumption were investigated based on the mineralogy. The results show that under the conditions of leaching time of 3-4 h, temperature of 150 ℃, sulfuric acid consumption of 25%-30%, ratio of liquid to solid of 1.2:1, the granularity less than 0.074 mm, additive consumption of 3%-5%, and oxygen pressure of 1.2 MPa, and the vanadium leaching rate can be more than 92% by the method of two-step pressurized acid leaching. The powdery V2O5 product with 99.52% in V2O5 content is obtained by the flowsheet of acid recovery, removing iron by reduction process, solvent extraction, precipitating vanadium with ammonium water, and pyrolysis from the stone-coal oxygen pressure acid-leaching solution. The total recovery efficiency of vanadium is above 85%, which is more than 20% higher than that obtained in the conventional process. Furthermore, the new process does not cause air pollution since no HCl or Cl2 is released by calcination of the raw material....
2020-06-12 16:19:10浏览：1431
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Recovering germanium from coal ash by chlorination with ammonium chloride
A new process of enriching germanium from coal ash was developed. The process involves in mixing the coal ash and ammonium chloride and then roasting the mixture to produce germanium chloride that is then absorbed by dilute hydrochloric acid and hydrolyzed to germanium oxide. The germanium recovery reached to 80.2% at the optimum condition: mass ratio of NH4Cl/coal ash is 0.15, roasting temperature 400℃ and roasting time 90 min....
2020-06-12 16:16:59浏览：1432
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初冷器循环水余热的回收利用
分析了煤气冷凝鼓风系统横管初冷器生产现状和煤气净化过程中所需冷却水供给情况，结合热源和用冷需求情况，对初冷器进行适当改造，将初冷器上段高温循环水作为溴化锂吸收式热水型制冷机组热源，回收生产余热，实现能源的二次开发和利用，具有较好的经济效益和社会环保效益。...
2020-06-12 16:00:08浏览：1434
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