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DE-102019210282-B4 - Device for the production of particles

DE102019210282B4DE 102019210282 B4DE102019210282 B4DE 102019210282B4DE-102019210282-B4

Abstract

Device (PR) for producing particles (P) from at least one raw material (RM), comprising - at least one burner (1) and a combustion chamber (2) adjoining the burner (1) for generating a pulsating hot gas flow (HGS), - a reaction chamber section downstream of a material input (5) and - at least one temperature control device (TV1) for temperature control of the hot gas stream (HGS) with a temperature control section (10) and a housing (9) which completely encloses a reaction chamber or the reaction chamber section (5) in such a way that a housing interior (9.3) is formed between the housing (9) and the temperature control section (10), wherein the housing (9) comprises a connection through which a temperature control medium (TM) can be supplied into the housing interior (9.3), and wherein a plurality of elements (10.n) are arranged distributed over the circumference of the reaction chamber or reaction chamber section (5) through which the temperature control medium (TM) can be introduced into and mixed with the hot gas stream (HGS) in the reaction chamber or reaction chamber section (5), and/or - at least one temperature control device (TV2) for heat transfer between at least two device sections (PR1 to PRn), wherein the temperature control device (TV2) comprises at least one temperature control section (8) which is thermally coupled to the device sections (PR1 to PRn) for heat transfer and comprises an interior space (8.2, 8.2') to which at least one temperature control medium (TM) for heat transfer can be supplied, which can be guided along the at least two device sections (PR1 to PRn), and wherein the temperature control section (8) completely surrounds the respective device section (PR1 to PRn) and has a shape of the temperature control section (8) with a shape of the respective device section (PR1 to PRn) corresponds, and wherein the temperature control section (8) - at least one feed element (8.3) for supplying the temperature control medium (TM) and - at least one discharge element (8.4) for discharging the temperature control medium (TM) to the flow-inlet end of the combustion chamber (2), the burner (1) or into the reaction chamber section (5) and wherein the discharge element (8.4) is fluidically coupled to the flow-inlet end of the combustion chamber (2), the burner (1) or to the reaction chamber section (5), whereby the discharged temperature control medium (TM) can be introduced into the flow-inlet end of the combustion chamber (2), the burner (1) or into the reaction chamber section (5).

Inventors

  • Toralf Rensch
  • Holger Renft
  • Christian Klaus
  • Marcus Linz

Assignees

  • IBU-TEC ADVANCED MATERIALS AG

Dates

Publication Date
20260513
Application Date
20190711
Priority Date
20180712

Claims (8)

  1. Device (PR) for producing particles (P) from at least one raw material (RM), comprising: - at least one burner (1) and a combustion chamber (2) adjoining the burner (1) for generating a pulsating hot gas stream (HGS), - a reaction chamber section (5) downstream of a material feed, and - at least one temperature control device (TV1) for temperature control of the hot gas stream (HGS) with a temperature control section (10) and a housing (9) which completely encloses a reaction chamber or the reaction chamber section (5) such that an interior space (9.3) is formed between the housing (9) and the temperature control section (10), wherein the housing (9) includes a connection through which a temperature control medium (TM) can be supplied to the interior space (9.3), and wherein a plurality of elements (10.n) are arranged distributed over the circumference of the reaction chamber or the reaction chamber section (5) through which the temperature control medium (TM) is supplied to the hot gas stream. (HGS) can be introduced into and is miscible with the reaction chamber or reaction chamber section (5), and/or - at least one temperature control device (TV2) for heat transfer between at least two device sections (PR1 to PRn), wherein the temperature control device (TV2) comprises at least one temperature control section (8) which is thermally coupled to the device sections (PR1 to PRn) for heat transfer and comprises an interior space (8.2, 8.2') to which at least one temperature control medium (TM) can be supplied for heat transfer, which is thereby transferred along the at least two device sections (PR1 to PRn) can be guided, and wherein the temperature control section (8) completely surrounds the respective device section (PR1 to PRn) and a shape of the temperature control section (8) corresponds to a shape of the respective device section (PR1 to PRn), and wherein the temperature control section (8) comprises at least one feed element (8.3) for supplying the temperature control medium (TM) and at least one discharge element (8.4) for discharging the temperature control medium (TM) to the flow-inlet end of the combustion chamber (2), the burner (1) or into the reaction chamber section (5), and wherein the discharge element (8.4) is fluidically coupled to the flow-inlet end of the combustion chamber (2), the burner (1) or to the reaction chamber section (5), whereby the discharged temperature control medium (TM) flows into the flow-inlet end of the combustion chamber (2), the burner (1) (1) or can be introduced into the reaction chamber section (5).
  2. Device (PR) according to Claim 1 , wherein the combustion chamber (2) and/or the reaction chamber section (5) each form one or more device sections (PR1 to PRn).
  3. Device (PR) according to Claim 1 or 2 , wherein the temperature control section (8) of the temperature control device (TV2) is designed as a multi-walled component, wherein at least one interior space (8.2') is formed between an outer wall (8.1.2) and an inner wall (8.1.1) of the multi-walled component, through which the temperature control medium (TM) can be guided in the direction of the downstream device section (PR2, PR4, PR6, PR8, PR10).
  4. Device (PR) according to Claim 3 , wherein the temperature control section (8) of the temperature control device (TV2) comprises at least one further interior space (8.2") through which the temperature control medium (TM) can be guided to the flow inlet side end of the burner or into the reaction chamber section (5).
  5. Device (PR) according to Claim 1 , wherein the temperature control section (10) of the temperature control device (TV1) is connected to the reaction chamber section (5) in the area of an inlet opening (9.1) and an outlet opening (9.2).
  6. Device (PR) according to Claim 1 , wherein the majority of elements (10.2 to 10.n) are designed as elements (10.2 to 10.n) projecting into the interior of the housing (9.3).
  7. Device (PR) according to Claim 6 , wherein the majority of elements (10.2 to 10.n) are formed radially on the temperature control section (10).
  8. Device (PR) according to Claim 6 or 7 , wherein the majority of elements (10.2 to 10.n) are tubular in shape.

Description

The invention relates to a device for the production of particles, in particular fine particles, such as nanoscale or nanocrystalline particles. Such particles typically have a mean grain size of 10 nm to a few millimeters. Atoms or molecules that are part of a surface have different electronic and chemical properties than atoms or molecules in the interior of the material. The smaller a particle is, the higher its proportion of surface atoms. Accordingly, very finely divided materials, especially nanoparticles, can have completely different mechanical, electronic, chemical, or optical properties than chemically and mineralogically identical larger particles, making them particularly interesting for specific applications. The following manufacturing processes have become established for the production of finely divided powders: chemical synthesis in solutions (e.g., sol-gel method), plasma synthesis, or gas-phase synthesis (aerosol process). Depending on the application of the nanoparticles, a precisely defined and narrow particle size distribution is usually required. Depending on the chemical nature of the desired nanoparticles, one process or another is better suited to achieving a good result. Solution-based or self-organizing processes usually yield the best results, but are difficult or even impossible to implement on an industrial scale. From the WO 02 / 072 471 A2 or from the DE 10 2004 044 266 A1 as well as the DE 10 2008 006 607 A1 and DE 10 2006 046 806 A1 Pulsation reactors are known for the production of finely divided powders. From the DE 10 2016 005 155 A1 A vibrating firing system is known for generating a pulsating hot gas flow. The invention is based on the objective of providing an improved device for the production of particles, in particular fine particles such as nanoscale or nanocrystalline particles. The problem is solved according to the invention by a device having the features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims. The device for producing particles, in particular fine particles such as nanoscale or nanocrystalline particles, for example with an average particle size of 10 nm to a few millimeters, from at least one raw material, comprises at least one burner and a combustion chamber adjoining the burner for generating a pulsating hot gas stream. Furthermore, the device comprises a reaction chamber section downstream of the material feed, for example a resonance tube, and at least one temperature control device for temperature control of the hot gas stream, comprising a temperature control section and a housing that completely encloses a reaction chamber or the reaction chamber section such that an interior space is formed between the housing and the temperature control section. The housing includes a connection through which a temperature control medium can be supplied to the interior space, and a plurality of elements are arranged distributed around the circumference of the reaction chamber or the reaction chamber section, through which the temperature control medium can be introduced into and mixed with the hot gas stream in the reaction chamber or the reaction chamber section. Alternatively or additionally, at least one temperature control device for heat transfer is arranged between at least two device sections. The temperature control device comprises at least one temperature control section, which is thermally coupled to the device sections for heat transfer and includes an interior space into which at least one temperature control medium for heat transfer can be supplied and which can be guided along the at least two device sections. The temperature control section completely surrounds the respective device section, and a shape of the temperature control section corresponds to a shape of the respective device section. The temperature control section comprises at least one feed element for supplying the temperature control medium and at least one discharge element for discharging the temperature control medium to the flow-inlet end of the combustion chamber, burner, or into the reaction chamber section, wherein the discharge element is fluidically coupled to the flow-inlet end of the combustion chamber, burner, or the reaction chamber section, allowing the discharged temperature control medium to be introduced into the flow-inlet end of the combustion chamber, burner, or the reaction chamber section. In particular, the combustion chamber and/or the reaction chamber section each form one or both of the device sections. By means of the temperature control device for temperature control of the hot gas stream, hereinafter referred to as the first temperature control device, an adjustment is made. Controlling the temperature of the hot gas stream within the reaction chamber is possible. In particular, cooling the hot gas stream and thus reducing the treatment temperature for particle production is adjustable and regulatory.