CN-122007407-A - System for be used for continuous hydrogenation of metal powder to refine

CN122007407ACN 122007407 ACN122007407 ACN 122007407ACN-122007407-A

Abstract

The invention relates to the technical field of metal hydrogenation, and discloses a system for continuous metal powder hydrogenation refinement, which comprises a continuous hydrogenation reaction device, a pressure relief separation device and an air supply mechanism. The metal powder enters the vertical reactor from the side wall feeding pipe, hydrogenation reaction and pre-crushing are carried out under the heat management of rising air flow lifting and outer wall temperature control, and the generated hydrogenated powder enters the pressure relief separation device along with air flow through the discharge pipe. After gas-solid separation, the powder is temporarily stored, and the tail gas is treated and circulated back to the reactor. The combination of heat management and unreacted hydrogen convection heat exchange can ensure the reaction temperature, can timely lead out the reaction heat, prevents caking or melting caused by local overheating and ensures the product quality.

Inventors

WANG WANLIANG
WU XUEYUN
CHEN XI
WANG JINGFENG
LI FANGFANG
XIE JUN
ZHANG HAOCHENG
ZHAO XINLING
GUO ZHENGZHI

Assignees

重庆新型储能材料与装备研究院

Dates

Publication Date: 20260512
Application Date: 20250917

Claims (10)

1. A system for continuously hydrogenating and refining metal powder is characterized by comprising a continuous hydrogenation reaction device, a pressure relief separation device and an air supply mechanism, wherein the continuous hydrogenation reaction device comprises a reactor body and a reaction heat management device, the reactor body is vertically arranged and provided with a feed inlet and an air inlet pipe, the feed inlet comprises a feed pipe and an air inlet pipe, the feed pipe is arranged on the side wall of the reactor body and can convey metal powder into the reactor body through the feed pipe, reaction gas is continuously fed into the reactor body through the air inlet pipe and discharged through the air inlet pipe to form an ascending air flow, the reaction heat management device comprises a reaction heat exchanger and a part of ascending air flow, the reaction heat exchanger is arranged on the outer wall of the reactor body and can carry out heat management on the reactor body, the metal powder enters a hydrogenation reaction zone through the feed pipe, hydrogenation reaction and pre-crushing are carried out under the heat management of the ascending air flow, the hydrogenated metal powder is further refined at the upper part of the reactor, the hydrogenated metal powder enters the pressure relief separation device through the air inlet pipe, the pressure relief separation device comprises a gas-solid separation unit and a storage bin, the gas-solid separation unit carries the refined hydrogenated metal powder and the metal powder is carried by the air inlet pipe, the gas-solid separation unit is fed into the reaction tail gas inlet and is continuously communicated with the air supply mechanism, and the tail gas is fed into the reaction tail gas through the air inlet, and the tail gas is continuously fed into the reaction tail gas through the reaction tail gas inlet, and is continuously communicated with the tail gas supply mechanism, and the tail gas is fed into the reaction tail gas after the tail gas is fed into the reaction device.
2. The system for continuous hydrogenation refining of metal powder according to claim 1, wherein the continuous hydrogenation reaction device further comprises a refining mechanism, the refining mechanism comprises a refining nozzle, the refining nozzle is fixed on the side wall between the feed port and the discharge pipe and is communicated with the exhaust port, the continuous hydrogenation reaction device further comprises a first heat exchanger and a heat storage piece, the first heat exchanger comprises a mass transfer cavity and a heat transfer cavity, the gas outlet pipe of the reactor body is communicated with a tail gas pipe, the mass transfer cavity is communicated with the tail gas pipe, the heat transfer cavity is circulated with a heat transfer medium and can exchange heat with tail gas in the mass transfer cavity through the circulation of the heat transfer medium, the plurality of reaction heat exchangers and the first heat exchanger form a waste heat recovery unit, the waste heat recovery unit is communicated with the heat storage piece, and heat energy released by the hydrogenation reaction is transferred to the heat storage piece through the waste heat recovery unit.
3. The system for continuously hydrogenating and refining metal powder according to claim 2, wherein the pressure release separation device comprises a plurality of gas-solid separation units, each gas-solid separation unit comprises a gas-solid separation cavity and a first middle bin, each gas-solid separation cavity is provided with a first inlet and outlet, a second inlet and outlet and a third inlet and outlet, the first inlet and outlet is communicated with the discharge pipe, the second inlet and outlet is communicated with the tail gas inlet, the third inlet and outlet is communicated with the first middle bin, a valve is arranged between the third inlet and outlet and the first middle bin, the first middle bin is communicated with a stamping pipe, the gas-solid separation cavities of adjacent gas-solid separation units are connected in series, a filter part with gradually reduced filter holes is fixed in each gas-solid separation cavity, the third inlet and outlet and the second inlet and outlet are isolated through the filter part, the gas supply mechanism further comprises a stamping unit, the stamping pipe is communicated with the gas source capable of outputting a specific gas pressure reaction gas, the pressure release separation unit further comprises a pressure release separation unit, and the pressure release separation unit is arranged between the pressure release unit and the first middle bin, and the pressure release separation unit can release the gas to the gas source.
4. A system for continuously hydrogenating and refining metal powder according to claim 3, wherein the pressure release separation unit comprises a pressure release separation cavity and a second intermediate bin, the pressure release separation cavity is also provided with a first feeding and discharging port, a second feeding and discharging port and a third feeding and discharging port, the first feeding and discharging port is communicated with a pressure release pipe, the second feeding and discharging port is communicated with an air source, the third feeding and discharging port is communicated with the second intermediate bin, the first intermediate bin and the second intermediate bin are respectively provided with a discharging valve, the storage bin comprises a first finished product bin and a second finished product bin, and the first finished product bin and the second finished product bin are respectively communicated with the first intermediate bin and the second intermediate bin through the discharging valves.
5. A system for continuous hydrorefining of metal powder as set forth in claim 4, wherein the air supply mechanism further comprises an air supply unit, the air supply unit further comprises a heater and a pressurizing module, the heater is arranged between the air supply port and the pressurizing module and is respectively communicated with the air supply port and the air outlet end of the pressurizing module, the pressurizing module comprises at least two groups of air compressors which are operated alternately, and the air inlet ends of the two groups of air compressors are respectively provided with a filter and are communicated with the tail gas air inlet through the filters.
6. A system for continuous hydrorefining of metal powder as set forth in claim 5, wherein the air supply mechanism further comprises a displacement unit comprising a displacement unit capable of continuously outputting an inert gas, the displacement unit being in communication with the first intermediate chamber and the air inlet end of the pressurizing module.
7. A system for continuous hydrorefining of metal powder as set forth in claim 6, wherein the waste heat recovery unit further comprises a second heat exchanger disposed between the outlet pipe and the first heat exchanger and capable of preheating gas entering the inlet pipe.
8. A system for continuous hydrorefining of metal powder as set forth in claim 7, further comprising a waste heat utilization module comprising a third heat exchanger and a plurality of heat consumers, the third heat exchanger being disposed between the heat storage and the heat consumers and being capable of transferring thermal energy from the heat storage to the heat consumers.
9. The system for continuous hydrorefining of metal powder as set forth in claim 7, further comprising a waste heat utilization module, wherein the waste heat utilization module comprises a power generation unit, and wherein the power generation unit comprises a turbine and a generator, wherein the generator is in communication with the first heat exchanger through the turbine and is capable of generating power by utilizing heat energy in the tail gas through the first heat exchanger.
10. The system for continuous hydrorefining of metal powder according to claim 1, wherein the reaction gas is pure hydrogen gas or a mixture of hydrogen gas and inert gas at a pressure of 1-6 Mpa and a temperature of 50-500 ℃, the metal powder material is alloy powder or mixture powder with a particle size of less than 2000 μm and suitable for storing hydrogen gas, the content of hydrogen storage metal in the alloy powder or mixture powder is more than 70%, and the hydrogen storage density of the prepared hydrogenated metal powder is 0-7.6wt%.

Description

System for be used for continuous hydrogenation of metal powder to refine Technical Field The scheme relates to the technical field of metal hydrogenation, in particular to a system for continuous metal powder hydrogenation refinement. Background The hydrogen energy is a secondary energy source with rich sources, and has wide application scenes. The hydrogen energy has the advantages of high energy density, functional diversity, no pollution, no toxicity or harm, abundant reserves, environmental compatibility and the like, is an ideal secondary energy carrier matched with the primary energy, and is expected to play a great role in the process of replacing fossil energy. The hydrogen energy full industrial chain comprises 3 key links of hydrogen production, hydrogen storage and transportation and hydrogen utilization. The high-density storage and transportation of hydrogen energy is a bridge for hydrogen preparation and application, and is a bottleneck for limiting the hydrogen energy layout in the world and China. The hydrogen storage technology is mainly divided into low-temperature liquid hydrogen storage, high-pressure gaseous hydrogen storage and solid material hydrogen storage. Solid metal hydrogen storage is currently the most reliable, safest and most efficient way of storing hydrogen. At present, solid metal hydrogen storage materials are mainly prepared by methods such as a smelting method, a sintering method, a diffusion method, a ball milling method and the like. For example, chinese patent publication No. CN102583244B discloses a hydrogenation reaction method, in which a processed metal powder is placed in a reaction vessel, hydrogen gas with pressure required by a process is introduced, then the reaction vessel is heated to a temperature required by the process, and after the metal powder is sufficiently reacted with the hydrogen gas by thermal insulation hydrogenation, the heating is stopped, so as to obtain a solid metal hydrogen storage material. However, the hydrogenation reaction method cannot be used for continuous preparation, and the processes of heating, reacting, cooling, harvesting and the like are repeated every time the preparation process of the solid metal hydrogen storage material is carried out, so that the energy consumption is high. Disclosure of Invention The invention aims to provide a system for continuous hydrogenation refinement of metal powder, which is used for continuously preparing a solid metal hydrogen storage material, so that the energy consumption for preparing the solid metal hydrogen storage material is reduced. The continuous hydrogenation reaction device comprises a reactor body and a reaction heat management device, wherein the reactor body is vertically provided with a feed inlet and a discharge pipe, the feed inlet comprises a feed pipe and an air inlet pipe, the feed pipe is arranged on the side wall of the reactor body and can convey metal powder into the reactor body through the feed pipe, reaction gas is continuously fed into the reactor body through the air inlet pipe and discharged through the discharge pipe to form an ascending air flow, the reaction heat management device comprises a reaction heat exchanger and a part of ascending air flow, the reaction heat exchanger is arranged on the outer wall of the reactor body and can carry out heat management on the reactor body, the metal powder enters a hydrogenation reaction zone through the feed pipe, hydrogenation reaction and pre-crushing are carried out under the lifting of the ascending air flow and the heat management of the reaction heat exchanger, the hydrogenation metal powder is further refined at the upper part of the reactor, the hydrogenation metal powder enters the pressure release separation device through the discharge pipe under the wrapping of the ascending air flow, the separation device comprises a gas-solid separation unit and a storage bin, the hydrogenation metal powder is carried by the air inlet pipe and is continuously fed into the reaction heat exchanger through the air inlet pipe, the air inlet pipe is communicated with the air inlet and the air supply mechanism, the hydrogenation metal powder is continuously fed back into the reaction zone, and the reaction tail gas is fed into the reaction zone through the air inlet and the air supply mechanism, and the tail gas is continuously fed into the reaction unit, and the reaction device is fed into the reaction chamber and the reaction device. The beneficial effect of this scheme is: the continuous hydrogenation reaction and the heat exchange process in the continuous hydrogenation reaction device for the metal powder continuously enters the reactor body to carry out hydrogenation reaction and refine hydrogenated metal after hydrogenation is completed, the hydrogen and the metal powder are all in a flowing state in the process and can fully react with the metal powder to effectively shorten the time of the hydrogenation reaction, m