Observation hole lining of ceramic fiber modules

Abstract

The invention discloses an observation hole lining of ceramic fiber modules. The observation hole lining of ceramic fiber modules comprises four modules and a central observation hole. The four modules are arranged around the observation hole, and an inverted-funnel-shaped space is formed in the center. The modules are formed by overlapping ceramic fiber blankets in the compression directions. The top and bottom modules have the same compression direction. The left and right modules have the same compression direction perpendicular to that of the top and bottom modules. Ceramic fiber blankets are layered among the four modules, so that no gap occurs among the modules. The modules are fixed to a furnace inner wall. The observation hole lining has the advantages of no crack, less proneness to deformation of view space, the size well meeting the design requirements, high integrity, convenience in mounting and maintenance, long-period operation, safety and reliability and the like.

Description

technical field [0001] The invention relates to the field of petrochemical equipment, and more specifically relates to a ceramic fiber module firehole lining for industrial furnaces. Background technique [0002] Industrial furnaces (including various heating furnaces, hydrogen conversion furnaces and ethylene cracking furnaces, the same below) are one of the most important equipment in petrochemical plants. The operating status of the furnace directly affects the entire device, so the on-site inspection of the furnace The state is very important. In order to be able to observe the operation of the furnace, it is necessary to set a fire hole. Therefore, it is very important and indispensable to reasonably set the fire viewing hole on the industrial furnace. As we all know, industrial furnaces are high-temperature equipment. Due to the opening of the hole, the lining of the fire hole is relatively thin, and the frequent changes of cold and heat make the fire hole often prone...

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Problems solved by technology

[0007] 1) Since the fire viewing hole has a certain strength, its thermal shock resistance is not as good as that of the ceramic fiber module, and the cold and heat changes at the fire viewing hole are more frequent, so after a period of operation, it is easy to produce large cracks

[0008] 2) Since the vacuum-formed fire hole is a whole, and its material is different from the material of the ceramic fiber module, resulting in a different linear expansion coefficient, after a period of operation, it is easy to produce a gap between the vacuum-formed fire hole and its surrounding lining. larger cracks

[0012] 1) Since the ceramic fiber blanket used to make the fire viewing hole is compressed in the horizontal direction, there is a certain expansion force in the ceramic fiber blanket along the horizontal direction. In addition, the ceramic fiber blanket is relatively soft, so the horizontal viewing angle of the fire viewing hole will be caused. The space shrinks and deforms, which affects the observation line of sight and range

[0013] 2) Since the fire viewing hole is cut on site after installation, it is limited by the cutting space on site, and it is not easy to control the cutting size when cutting on site. The size error of the viewing angle space after cutting is relatively large. The rear surface is also uneven, so it is difficult to guarantee the cutting quality of the viewing angle space

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