A device for centering a temperature measurement device inside a reactor tube that will be filled with catalyst, including multiple inflatable bladders mechanically and fluidically attached to a centering ring.

A method of installing a temperature measuring device inside a reactor tube while filling the tube with catalyst is provided. The method includes inserting a positioning system, including multiple inflatable bladders connected at a central location to a centering ring, into reactor tube, the reactor tube comprising a distal end and a proximal end. Then inserting a temperature measurement device into the centering ring. Locating the positioning system at a first predetermined distance from the distal end. Then inflating the multiple inflatable bladders, thereby centering the centering ring and the temperature measurement device within the SMR tube, and introducing catalyst into the SMR tube, thereby enclosing the temperature measurement device in catalyst.

A dismountable and dismantlable loading system for loading a reactor with bulk material, is described. The dismantlable rail system with a multiplicity of rail segments can be connected to one another to form a self-contained rail system, wherein the individual rail segments have the ability to connect the rail segments to one another. Also provided is at least one rail vehicle for operation on the rail system, having a holding device for containers for receiving the bulk material, and at least one filling station for receiving the bulk material, having a hose present in the floor of the filling station for transporting the bulk material into various areas of the reactor.

A device for rapidly preparing β-Si3N4 by gas-solid reaction and a method thereof, and relates to the technical field of recycling and reuse of waste fine silicon powder. The bottom of a stock bin communicates with a first opening and closing passage, a first connection passage, and the top of a first transitional bin; the bottom of the first transitional bin communicates with the first opening and closing passage, a second connection passage, and the top of a reaction bin; the bottom of the reaction bin communicates with a second opening and closing passage, the first connection passage, and the top of a second transitional bin; the bottom of the second transitional bin communicates with the top of a conveying passage through the first opening and closing passage; a material outlet of the conveying bin communicates with the collection bin.

A method of producing a composite product is provided. The method includes providing a fluidized bed of carbon-based particles in a fluidized bed reactor, providing a catalyst or catalyst precursor in the fluidized bed reactor, providing a carbon source in the fluidized bed reactor for growing carbon nanotubes, growing carbon nanotubes in a carbon nanotube growth zone of the fluidized bed reactor, and collecting a composite product comprising carbon-based particles and carbon nanotubes.

An apparatus for producing hydrogen gas is provided. The apparatus includes a first hopper having a reaction chemical. The reaction chemical includes sodium borohydride (NaBH.sub.4) and a chemical component. The chemical component may be magnesium chloride (MgCl.sub.2). The apparatus also includes a reaction chamber. The reaction chamber has an input for receiving the reaction chemical from the first hopper and an output for removal of hydrogen gas. The apparatus also includes a second hopper for containing spent solid chemical mixture removed or extracted from the reaction chamber.

Embodiments of the invention are directed to a device and a method for unloading particulate material from a reactor tube of a catalytic reactor comprising an array of substantially vertically aligned reactor tubes. The device comprises an air lance (11, 111-113) for loosening the particulate material inside the reactor tube using pressurized air, an air lance unit (10) for feeding the air lance in and out of the reactor tube, and a flexible guide tube (12, 121-123) on one end connectable to the air lance unit and on the other end connectable to a cleaned reactor tube (7, 71-73) for guiding the air lance from the reactor tube to the cleaned reactor tube for storing a part of the air lance that has not been fed into the reactor tube within the first cleaned reactor tube.

A catalyst loading and unloading system for chemical reactors has an extendable catalyst transfer tube that is fed by a catalyst hopper and controlled by a tube displacement mechanism; more particularly, by a winch mechanism. As the reactor chamber fills with catalyst, a lower end of the extendable catalyst transfer tube is displaced upward by the tube displacement mechanism to correspond with the rising height of the catalyst bed within the chamber. The extendable catalyst transfer tube may further be used to vacuum old catalyst out of the reactor chamber.

A continuous feeding process and device for waste flexible polymer material; wherein the process continuously feeds waste flexible polymer material into a subsequent pyrolysis apparatus following compression, cutting and dispersion; the waste flexible polymer material is pre-treated during compression, cutting and dispersion to achieve continuous sealing feeding, while pyrolysis oil gas preheats and self-lubricates the device; the device used includes a feeding apparatus, a material dispersion apparatus and a screw feeder; the material is compressed, cut and dispersed in the feeding apparatus and the material dispersion apparatus, and then falls into the screw feeder, being preheated and thermally sealed by the pyrolysis oil-gas in the screw feeder; by using such a process, waste flexible polymer material from various sources may be continuously fed for pyrolysis, fully using the temperature of an oil-gas generated in a pyrolysis machine for preheating and device lubrication.

The present invention relates to the field of high polymer material manufacturing, and discloses an air-isolated continuous feeding system for synthesizing polylactic acid from lactide and a feeding method thereof. The continuous feeding system comprises a raw material bag/box and a raw material collector for collecting and outputting lactide, the raw material bag/box is connected with a shielding gas input pipeline, a discharge pipe is movably inserted into the raw material bag/box, a cyclone separator is connected downstream of the discharge pipe, and a solid substance outlet of the cyclone separator is connected with the raw material collector. According to the invention, deterioration of the lactide raw material incurred by moisture absorption and oxidation is avoided, and the reaction conversion ratio and final product purity are improved. The continuous feeding system is easy to operate, can save manpower and material resources, and is applicable to industrial application.