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两段炉对入炉煤的粘结性、灰熔点、挥发分、热稳定性和水分的要求做出的分析结果
来源:中阳机械煤气发生炉技术部 |发布时间:2011/5/18 | 浏览次数:

下面是我厂郑州中阳机械设备有限公司对两段煤气发生炉入炉煤的粘结性、灰熔点、挥发分、热稳定性和水分的要求做出的分析结果。 Below is my factory ZhongYang mechanical equipment Co., LTD. Of zhengzhou for two paragraphs of boiling coal stove the bonding, ash melting point, volatile, thermal stability and water required to make analysis results.
(1)两段炉内的煤层较厚,一般都在6米以上,煤在炉内下移过程中,会产生挤压与磨擦。因此,要求两段炉用煤比单段炉用煤更应具有较高的抗碎、落下和耐磨强度。综上所述,入炉煤的煤质对两段炉的正常气化有着至关重要的影响。煤的粘结性是决定该煤是否可以在两段炉内气化使用的非常重要的指标,原因在与:在干馏段内煤料受热将出现膨胀与粘结的现象,如果其粘结性较强,则会在此粘连而聚成大团块或煤饼,破坏上升载热气体的均匀分布、影响干馏效果,而且还会阻碍、甚至堵塞料层均匀下移,导致整个炉内的气化过程恶化。反应煤在受热状态下的粘结性与膨胀性检测项目有:自由膨胀序数(CSN)、胶质层厚度(Y)值、罗加指数及煤工业分析中的焦渣特征等。 two paragraphs of coal seam in furnace thicker, be in commonly 6 meters above, coal in furnace process, can produce moves with friction. Squeeze Therefore, request two paragraphs than single segment with coal stove with coal more should have furnace broken, high resistance and wear strength falling.To sum up, boiling coal of two paragraphs of coal gasification furnace normal have a critical impact. Coal is the bonding whether can decide the coal gasification furnace in two segments of the very important indicators used with: because in dry distillation section material heated will appear in coal expansion and binding phenomenon, if its strong bonding, will gather in the adhesion into big clumps or coal bread, destroy the rise evenly heat gas influence, dry distillation effect, and hamper, even blocked material layer uniform, causing the furnace moves the gasification process deteriorated. Reaction in heated state of coal with bonding expansion test items include: free expansive ordinal number (CSN), gelatin layer thickness (Y) value, ROM add index and coal industry analysis of cinder features, etc.
(2)我们希望煤中的挥发分含量相应较高,突出体现上述优越性。一般来说,煤中的干燥无灰基挥发分含量,以不低于25%为宜,而〈固定碳/挥发分〉应大于1。 两段式炉体结构可降低煤气的携尘量;在干馏段内,煤中的挥发分转变为小分子烃类而析出,集中回收或提高煤气热值。we hope coal in the volatile content high, highlighting the corresponding superiority. Generally speaking, the yankees coal ash dry without volatile matter content, with no less than 25% advisable, and < fixed carbon/volatile > should be greater than 1. Two sections of furnace construction can reduce gas with dust capacity; In the dry distillation period inside, the volatile coal into small molecule hydrocarbons and exhalation, centralized recovery or improve gas calorific value.
(3)两段炉结构干馏段高而且料层厚,入炉后的煤块是缓慢受热升温的,煤中水分和挥发分析出速度也相应较慢,不会对煤层造成太大的冲击,因此,两段炉对煤的热稳定性要求可适当放宽。在单段煤气炉中,煤入炉后骤然遇高温而迅速热分解,煤中的挥发分急速析出,会使煤块爆裂粉碎;对固定床气化炉来说,煤的热稳定性是影响正常气化操作的重要因素。如果煤的热稳定性较差,煤炭入炉后就会因受热而产生崩裂、破碎,这样一来就会提高炉内阻力和增加带出物的数量。 two paragraphs furnace structure distillation section high and layer thickness, material after charging is slow trials of the heating temperature, of coal moisture and volatile analyze the speed also corresponding slower, not on the impact of coal seam cause too big, so, the two parts of the furnace of coal thermal stability requirement can relax appropriately. In a single paragraph, coal gas after charging high temperature and rapid thermal decomposition in abruptly, coal in the volatile rapid exhalation, can make cinderblocks blowout shattered; For a fixed bed gasifier speaking, thermal stability of coal gasification is affect the normal operation of important factor. If the poor thermal stability of coal, coal charging hind can because of be heated and produce split, broken, so they will improve furnace resistance and increase the number of bring out content.
(4)煤的水分含量高,对气化操作是很不利的,不仅蒸发其中的水分需要消耗一定的热量,使煤气热值降低,而且在贮运上和操作上会带来很大不便,尤其在冬季。统计表明,两段炉上段煤气热值会随着气化煤中的水分增加而明显下降,十分敏感。 煤气发生炉作为将煤炭由固态能源转化为气态、洁净能源的主要设备,气化煤种的选择至关重要,直接关系到其整体气化效果。两段式煤气发生炉适宜气化不粘煤、弱粘煤、长烟煤等烟煤,也可以气化质量较好的褐煤,相对一段炉而言两段炉选用煤种范围较宽,但是对气化用煤的具体指标要求较严格。 coal high water content, operation is very harmful to the gasification of not only the water evaporated, must expend quantity of heat, make gas calorific value drops, and in shipping and operation would bring great inconvenience, especially in winter. Statistics show that two paragraphs furnace gas calorific value will with section increases in coal gasification in water drops apparently, very sensitive.
煤气发生炉入炉的煤炭的粒度我们也给出如下解析:Gas occurrence boiler particle size of coal charging analytical: we also cooke
 有的煤气站入炉煤粒度甚至大于100mm,导致其运行效果很差。在两段炉运行操作过程当中,用户往往只看重设备运行状态是否正常炉体结构是否完善,却对气化用煤粒度情况重视不够,恰恰是这一点会直接影响到两段式煤气站的气化效果。两段炉之所以对煤的粒度要求严格,是因为在炉内干馏段和气化段中的料层总高度约为6-8米,如果煤的粒度悬殊,一方面会减少床层内的间隙度、增加炉内阻力,导致气化强度下降,煤气产量降低,灰渣含炭量也会随之增加;另一方面无法保证煤得到均匀、充分干馏,影响了两段式煤气发生炉的气化效果。任何一种类型的固定床气化装置,都要求入炉煤的粒度均一,满足炉内流体力学和传热传质的需要。 
 Some gas station boiling coal granularity 100mm, causing them to greater than even running effect is very poor. In two paragraphs furnace operation process, users are just focused on the running state of the equipment is normal furnace structure whether perfect, but with coal granularity situation of gasification is just not enough attention, it will directly affect the gasification two sections of gas station effect. Two segments of the particle size of coal stove requires strict furnace, because in the dry distillation segment and gasification section material layer always height about 6 to 8 meters wide, if coal granularity, on one hand, will reduce the gap degrees in beds, increasing the resistance furnace, resulting in gasification intensity drops, gas yield decreased, ash HanTanLiang also is met subsequently increase; On the other hand cannot assure coal to obtain even, full distillation, the impact of the two sections of gas occurrence boiler gasification effect. Any type of fixed bed gasification unit, require boiling coal granularity of furnace, meet the uniform of fluid mechanics and heat and qualitative needs.
两段炉入炉块煤的粒度要求最好控制在以下范围:粒级范围:15~30mm;20~40mm;25~50mm;30~60mm【 Two paragraphs furnace granularity of coal charging requirements in the following areas: best control level range: 15 ~ grain 30mm; 20 ~ 40mm; 25 ~ 50;30 ~ 60mm】

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