A miniature fixed-bed reaction device and method capable of realizing thermal online weighing

Abstract

The invention discloses a micro fixed-bed reactor capable of realizing online thermal-state weighing and a method. The device comprises an analytical balance, a thermal-radiation-preventing water cooling plate, a weighing rod, a liftable electric furnace, a silk screen bed layer, a thermocouple, a gas circuit and temperature control system, a transparent container, a fixed bed provided with an air distribution plate and a support, wherein the thermal-radiation-preventing water cooling plate is fixedly connected with the top of the transparent container; the top end of the weighing rod is located in the fixed bed, and the bottom end of the weighing rod is located on a tray of the analytical balance; the silk screen bed layer is fixedly connected with the top end of the weighing rod; the liftable electric furnace is fixedly connected with the outer side of the fixed bed; the temperature measuring end of the thermocouple is located in an inner cavity of the fixed bed, and the connecting end of the thermocouple is connected with a temperature measuring port of the gas circuit and temperature control system through a lead; a mass flow meter outlet of the gas circuit and temperature control system is connected with a ventilating port of the air distribution plate. With the adoption of the micro fixed-bed reactor and the method, online thermal-state weighing can be performed on solid reaction substances located in the fixed bed.

Description

technical field [0001] The invention belongs to the field of solid fuel pyrolysis, combustion and gasification, and in particular relates to a miniature fixed-bed reaction device and method capable of realizing online weighing in a hot state. Background technique [0002] The fixed bed reaction device is a kind of reactor filled with solid catalyst or solid reactant to realize the heterogeneous reaction process. The particle size of the solid matter in the miniature fixed-bed reactor commonly used in mechanism research is between 0.1 mm and 2 mm. A bed of a certain height is piled up in the reactor. When the bed is stationary, the fluid passes through the bed to react. [0003] The reactor device is mainly used to study the gas-solid phase catalytic reaction, and its advantages are: (1) The fluid and the solid matter can be effectively contacted, and the back mixing is small; (2) The mechanical wear of the solid matter is small; (3) The reactor structure Simple and economic...

AI Technical Summary

Problems solved by technology

Since the three devices all use suspended online weighing, it is impossible to test the real-time weight change of the solid particles participating in the gas-solid reaction when the solid particles reach fluidization

(4) A thermogravimetric device for measuring volatile and easily condensed products in the reaction process (patent number: CN102901687A). The research on the mechanism of gas-solid reaction by weighing may cause the weighing data obtained by the two balances to interfere with each other

(5) Thermogravimetric analysis furnace (patent number: CN104089477A), this device adopts pressing type weighing, but because it is mainly used to reflect the actual characteristics of industrial raw materials or ingredients, it cannot analyze the gas-solid reaction mechanism

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