RU86117U1 - COMPOSITE SYSTEM - Google Patents

Abstract

A composite system consisting of carbon microfibers or silicon dioxide, structured in the form of threads, reinforced with metal wire and woven into a fabric cloth, either into a mesh cloth or into a sleeve.

Description

The utility model relates to the field of the chemical industry, for example, to catalyst supports made of microfibers of carbon or high siliceous origin and can be used to create catalysts in the form of corrugated surfaces or block structures, or specially formed interblock structures in chemical reactors filling the space between catalytic blocks and walls a reactor; as well as to the field of composite structural materials and can be used as an integral element of a composite structure with subsequent impregnation and drying with binder compositions.

A known catalytic system for heterogeneous reactions, which is a geometrically structured system comprising microfibers of a highly siliceous fibrous carrier with a diameter of 5-20 microns. (RU 2292950, B01J 21/08, 02/10/2007).

A known catalytic system for heterogeneous reactions in which the carrier is made of silica glass microfibers, the carrier has pores smaller than 1 μm and a specific volume of not more than 0.05 cm ³ / g, the carrier microfibers in the system are structured in the form of woven or woven or extruded materials (RU 79054, B01J 8/00, 12.20.2008).

A disadvantage of the known catalytic systems is the unstabilized structure of the carrier web, which is the movement of the fibers relative to each other and the movement of the web relative to a place in space caused by washing or filtering gas or liquid flow. In a reactor assembled on catalyst blocks from a fiberglass support, this can lead to a sharp increase in hydraulic resistance that goes beyond limited limits.

In the manufacture of catalyst blocks on a fiberglass support, carried out by winding the web into the space between the frame (usually a corrugated mesh), even with stable tension in the central part of the block, the tension will have a greater value than at the periphery, which will lead to hydraulic heterogeneity along the radius of the block.

An important parameter of the catalyst along with activity is its thermal conductivity, which in turn depends on the amount of thermal conductivity of the carrier. The authors proved an almost twofold increase in the flow rate in the reaction of hydrogenation of alpha-methylstyrene to a single catalyst grain with an increase in thermal conductivity (W / m * K) from 0.2-0.3 to 1-1.5 in the work - A.V. Kulikov, N.A. Kuzin, A.B. Shigarov, V.A. Kirillov, A.E. Kronberg, and K.R. Westerterp, Experimental Study of Vaporization Effect on Steady State and Dynamic Behavior of Catalyst Particles, Catalysis Today, 2001, 66, 255-262. In addition, an increase in the thermal conductivity of the catalyst reduces the risk of (hot spots) emergency operation.

The utility model solves the problem of creating a composite system with high thermal conductivity and good structural properties.

The problem is solved in that the composite system consists of carbon microfibers or silicon dioxide, structured in the form of threads, reinforced with metal wire, which allows fabrication of fabrics of different weaving, or mesh fabrics with different mesh sizes, or woven into a sleeve.

The thermal conductivity of the composite web is determined by the material, cross section and the number of cores (units) of wire in the thread. Thus, the wire frame stabilizes the fabric web, mesh.

Using a wire of metals with different thermal conductivity, it is possible to change the thermal conductivity of the composite system in a wide range, and with it the catalyst and the catalytic unit.

The resulting web can be subjected to processes of applying modifying additives, applying the active components of the catalyst, molding in the form of a special profile, corrugation, pressing.

The technical effect of the claimed invention is:

1) In a higher performance chemical reactor.

2) In safe operation of the reactor (see article above), since the increased thermal conductivity of the catalyst increases the filling rate and eliminates the formation of hot spots.

3) The use of a stabilized wireframe web leads to stabilization of the hydraulic resistance in a wide range of gas and liquid flow rates.

4) Due to the presence of a rigid frame, the process of forming special profiles is greatly simplified and cheaper.

5) The use of a web with a wire frame as an element of structural materials increases the strength of the formed structure.

Claims (1)

A composite system consisting of carbon microfibers or silicon dioxide, structured in the form of threads, reinforced with metal wire and woven into a fabric cloth, either into a mesh cloth or into a sleeve.