[go: up one dir, main page]

US20190217233A1 - Production of a porous aluminum filter for a diaphragm pump - Google Patents

Production of a porous aluminum filter for a diaphragm pump Download PDF

Info

Publication number
US20190217233A1
US20190217233A1 US16/327,586 US201716327586A US2019217233A1 US 20190217233 A1 US20190217233 A1 US 20190217233A1 US 201716327586 A US201716327586 A US 201716327586A US 2019217233 A1 US2019217233 A1 US 2019217233A1
Authority
US
United States
Prior art keywords
gas
diaphragm
permeable body
salt
permeable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/327,586
Inventor
Frank Hannemann
Sebastian Rahm
Marcus Weder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dipl Ing Ernst Schmitz & Co KG Maschinen und Apparatebau GmbH
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RAHM, Sebastian, WEDER, MARCUS, HANNEMANN, FRANK
Assigned to DIPL. ING. ERNST SCHMITZ GMBH & CO. KG MASCHINEN UND APPARATEBAU reassignment DIPL. ING. ERNST SCHMITZ GMBH & CO. KG MASCHINEN UND APPARATEBAU ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SIEMENS AKTIENGESELLSCHAFT
Publication of US20190217233A1 publication Critical patent/US20190217233A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • B01D39/2051—Metallic foam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1216—Pore size
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive

Definitions

  • the invention relates to a method for producing a gas-permeable body which is formed with aluminum, and to a gas-permeable aluminum body produced in accordance with said method.
  • a body produced in accordance with the method according to the invention can be advantageously used as a loosening surface in a diaphragm pump for the fluidizing and charging of products in dust form, such as for example coal dust, by means of inert gas at pressures of up to 7 MPa as a filter element.
  • Continuous and inexpensive dense-stream conveying in the case of fluctuating dust quality of dusts for combustion for carbon and biomass gasification plants is of increasing importance in order, for example, to operate gasification plants economically and with high availability.
  • This aim is achieved in a particular manner using a diaphragm pump as proposed in the patent application DE102016201182 of Jan. 27, 2016.
  • the material for conveying in dust form is in this case drawn into the diaphragm pump from below, is charged and fluidized in a subsequent step, and is subsequently conveyed out under pressure.
  • the residual gas volume in the dust chamber of the diaphragm pump is expanded in a final step after the material for conveying has been conveyed out, and the pump cycle begins again.
  • Filter materials which satisfy the requirements with regard to compressive strength and temperature resistance are for example the metallic filtration fabrics described in DE102012216084, sintered metal and sintered plastic.
  • the described robust materials are available only in a flat or plate-like structure and not in the required size or dimensions. Mechanical processing into other geometrical shapes, such as for example half-shells, is not possible owing to the required filter fineness and the damage to or clogging of the porous filter structure that arises during mechanical processing.
  • the invention is based on the object of providing a filter element for feeding fluidizing and charging gas into the pressure vessel of a diaphragm pump, which filter element combines the requirements of pressure resistance, temperature resistance, adequate filter fineness, producibility with low outlay, and interaction with the diaphragm for the purposes of high diaphragm availability.
  • the object is achieved by means of a method for producing a gas-permeable aluminum body having the features of claim 1 , and by means of a gas-permeable aluminum body produced in accordance with said method, having the features of claim 3 .
  • the invention utilizes the realization that, for the mode of operation of the diaphragm pump, a uniformly distributed feed of the fluidizing gas in the lower region of the dust pump is essential.
  • a uniformly distributed feed of the fluidizing gas in the lower region of the dust pump is essential.
  • the loosening element produced in accordance with the invention has a constant porosity, whereby it can be ensured that superfine dust particles do not ingress into the loosening surface during the expansion process of the dust chamber, giving rise to a uniformly distributed feed of fluidizing gas into the dust chamber during the charging process.
  • the invention permits a structural design of the dust chamber with a contour which is adapted in a particularly advantageous manner to the deflection of the diaphragm and possibly to the guide rod of the diaphragm. In this way, a uniform and reversible deformation of the diaphragm with the least possible wear is achieved.
  • the diaphragm ( 3 ) lies substantially areally against the half-shell-shaped loosening surface ( 5 ).
  • a small dead volume can be achieved, which leads to a minimal dust chamber volume ( 10 ) with a simultaneously high conveying rate and low losses of high-pressure gas.
  • the pressure vessel that encloses the dust chamber has small dimensions with a minimized wall thickness, which leads to a reduction in production outlay.
  • the loosening surface 5 has, at the lowest point, a circular opening to which there is fastened a dust pipe 7 through which the material for conveying in dust form can be conveyed in and conveyed out, which material for conveying thus cannot pass into the gas chamber 13 .
  • the diaphragm pump illustrated in FIG. 1 is an apparatus composed of two pressure-resistant half-shells ( 1 , 12 ) which are connected to one another in gas-tight fashion by means of a flange connection ( 2 ).
  • the flange connection has, aside from the possibility of easy disassembly of the dust pump, the additional function of fastening and clamping the diaphragm ( 3 ) and the loosening surface ( 5 ) by means of a filter flange ( 4 ).
  • the deflection of the diaphragm is in this case caused by an action of force of the hydraulic liquid, as described for example in DE102016201182. Abrupt changes are avoided, and after the completion of the conveying-out process, it can be achieved that the diaphragm ( 3 ) lies substantially areally against the half-shell-shaped loosening surface ( 5 ).
  • a small dead volume can be achieved, which leads to a minimal dust chamber volume ( 10 ) with a simultaneously high conveying rate and low losses of high-pressure gas.
  • the diaphragm is guided and stabilized in terms of its movement by means of a guide rod ( 9 ).
  • the guide rod may, in a particularly advantageous embodiment, perform additional tasks such as for example the determination of the position of the diaphragm by means of measuring position transducers.
  • the invention is furthermore based on the problem of generating dense-stream conveying, described in DE 2005047583, by generating a fluidized bed within the dust chamber. This is achieved during the charging and conveying-out process by means of a homogeneous feed of gas via a half-shell-shaped and gas-permeable loosening surface ( 5 ).
  • filter material for the loosening surface ( 5 ) use is made of porous metal, for example aluminum, with an adequately small pore size and filter fineness of ⁇ 20 ⁇ m. It can thus be ensured that superfine dust particles do not ingress into the loosening surface during the expansion process.
  • liquid metal for example aluminum
  • salt has a significantly higher melting point for example in relation to metals such as aluminum, and does not change into the liquid state of aggregation, but rather distributes uniformly in the melt.
  • the salt is washed out by means of a salt-dissolving liquid, and porous and gas-permeable metal is formed.
  • An advantage of this method consists in the possibility of performing mechanical processing prior to the washing-out of the salt crystals. In this way, clogging of the pores is ruled out.
  • the required porosity and filter fineness is set by means of the size of the salt grains.
  • the loosening surface ( 5 ) may be formed in two layers; as a porous metal in the lower region and as a solid material in the flange region.
  • the half-shell-shaped casting mold of the loosening surface ( 5 ) is expanded to include additional ring-shaped and/or punctiform support elements ( 8 ). It is thus possible for the half-shell-shaped loosening surface ( 5 ) composed of porous metal to be fitted and fastened into the lower pressure-resistant half-shell ( 12 ) composed of solid material.
  • a gas chamber 13 is advantageously formed between the loosening surface composed of porous metal and the pressure-resistant half-shell, which gas chamber can be used for the distribution of the loosening and charging gas.
  • the feed and discharge of the loosening and charging gas is realized by openings 6 in the lower pressure-resistant half-shell 12 .
  • the diaphragm ( 3 ) is designed as a double diaphragm with integrated pressure sensor for leakage monitoring.
  • a hermetically sealed separation between hydraulic chamber ( 11 ) and dust chamber ( 10 ) it is possible for a hermetically sealed separation between hydraulic chamber ( 11 ) and dust chamber ( 10 ) to be ensured, and damage to the diaphragm can be identified in good time. Cumbersome repair and cleaning measures of the entire dust system or hydraulics system in the event of diaphragm damage are avoided, and the leak-tightness of the diaphragm is maintained during the fault situation.
  • the diaphragm 3 being designed as a double diaphragm
  • two resiliently elastic diaphragms are arranged so as to be mechanically supported relative to one another such that a closed intermediate space is formed between the diaphragms, which intermediate space can be monitored by means of a pressure sensor ⁇ p ( 14 ).
  • the intermediate space has a pressure lower than the pressure in the hydraulics chamber or the dust chamber. If a pressure increase is now detected in the intermediate chamber, a leakage of one of the two diaphragms of the double diaphragm is inferred.
  • the two diaphragms may be arranged so as to be mechanically supported relative to one another in punctiform fashion by virtue of a layer of balls being arranged between them.
  • the two diaphragms may be arranged so as to be mechanically supported relative to one another by virtue of a coupling liquid being introduced between them, which coupling liquid is operatively connected to the pressure sensor ⁇ p.
  • the resiliently elastic diaphragm may be formed with an elastomer or a solid PTFE mixture.
  • one of the two diaphragms may be realized by means of an elastomer, and the other of the two diaphragms may be realized by means of a solid PTFE mixture.
  • the invention is also provided by means of a diaphragm pump for fluidizing and conveying dusts, in the case of which

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

A method produces a porous, arched aluminum fluidization element for a diaphragm pump for fluidizing, covering and delivering pulverized products, such as pulverized coal, using inert gas at pressures of up to 7 MPa. The fluidization element ensures that fluidizing gas is supplied and homogeneously distributed in the pump lower region, and the contour of the space for pulverized materials may be advantageously designed in the diaphragm deflection area and optionally adapted to the diaphragm guide rod. In this way, a homogeneous and reversible deformation of the diaphragm is obtained with minor wear as far as possible. At the end of the delivery process of the diaphragm pump, the diaphragm is applied to the arched, half-shell-shaped fluidization surface in an extensively flat manner, and a small dead volume can be obtained, which results in minimal space for pulverized materials with a high delivery rate and little high-pressure gas loss.

Description

  • The invention relates to a method for producing a gas-permeable body which is formed with aluminum, and to a gas-permeable aluminum body produced in accordance with said method.
  • A body produced in accordance with the method according to the invention can be advantageously used as a loosening surface in a diaphragm pump for the fluidizing and charging of products in dust form, such as for example coal dust, by means of inert gas at pressures of up to 7 MPa as a filter element.
  • Continuous and inexpensive dense-stream conveying in the case of fluctuating dust quality of dusts for combustion for carbon and biomass gasification plants is of increasing importance in order, for example, to operate gasification plants economically and with high availability. This aim is achieved in a particular manner using a diaphragm pump as proposed in the patent application DE102016201182 of Jan. 27, 2016. The material for conveying in dust form is in this case drawn into the diaphragm pump from below, is charged and fluidized in a subsequent step, and is subsequently conveyed out under pressure. The residual gas volume in the dust chamber of the diaphragm pump is expanded in a final step after the material for conveying has been conveyed out, and the pump cycle begins again. Owing to this cyclic (discontinuous) mode of operation, it is normally the case that multiple pump heads are connected together in order to ensure continuous operation. For this purpose, the individual pump cycles are implemented with a phase offset with respect to one another. Filter materials which satisfy the requirements with regard to compressive strength and temperature resistance are for example the metallic filtration fabrics described in DE102012216084, sintered metal and sintered plastic. The described robust materials are available only in a flat or plate-like structure and not in the required size or dimensions. Mechanical processing into other geometrical shapes, such as for example half-shells, is not possible owing to the required filter fineness and the damage to or clogging of the porous filter structure that arises during mechanical processing.
  • From the special print from “Industriepumpen +Kompressoren” [“Industrial pumps and compressors”], 16th volume, book 3-2010, pages 120-123, Vulkan-Verlag Essen, with the title “Prozesspumpen mit zustandsüberwachter redundanter Schlauchmembran-Einspannung” [“Process pumps with state-monitored redundant hose diaphragm clamping”] by Heinz M. Nägel, a process pump is known, the double diaphragm of which is monitored with regard to integrity by means of coupling fluid and connection to a diaphragm rupture indicator.
  • The invention is based on the object of providing a filter element for feeding fluidizing and charging gas into the pressure vessel of a diaphragm pump, which filter element combines the requirements of pressure resistance, temperature resistance, adequate filter fineness, producibility with low outlay, and interaction with the diaphragm for the purposes of high diaphragm availability.
  • The object is achieved by means of a method for producing a gas-permeable aluminum body having the features of claim 1, and by means of a gas-permeable aluminum body produced in accordance with said method, having the features of claim 3.
  • The invention utilizes the realization that, for the mode of operation of the diaphragm pump, a uniformly distributed feed of the fluidizing gas in the lower region of the dust pump is essential. In the case of the loosening element produced in accordance with the invention, it is ensured that, by means of processing to form a domed filter element with a 3-dimensional shaping, any clogging of the material is avoided, and a uniform porosity can be realized.
  • The loosening element produced in accordance with the invention has a constant porosity, whereby it can be ensured that superfine dust particles do not ingress into the loosening surface during the expansion process of the dust chamber, giving rise to a uniformly distributed feed of fluidizing gas into the dust chamber during the charging process.
  • The invention permits a structural design of the dust chamber with a contour which is adapted in a particularly advantageous manner to the deflection of the diaphragm and possibly to the guide rod of the diaphragm. In this way, a uniform and reversible deformation of the diaphragm with the least possible wear is achieved.
  • After the completion of the conveying-out process of the diaphragm pump, it can be achieved that the diaphragm (3) lies substantially areally against the half-shell-shaped loosening surface (5). By means of this advantageous embodiment, a small dead volume can be achieved, which leads to a minimal dust chamber volume (10) with a simultaneously high conveying rate and low losses of high-pressure gas.
  • In the case of a hydraulically driven diaphragm pump for the pneumatic high-pressure conveyance of fluidized dusts, which diaphragm pump is equipped with the filter element produced in accordance with the invention, the pressure vessel that encloses the dust chamber has small dimensions with a minimized wall thickness, which leads to a reduction in production outlay.
  • In one particular embodiment of the invention, the loosening surface 5 has, at the lowest point, a circular opening to which there is fastened a dust pipe 7 through which the material for conveying in dust form can be conveyed in and conveyed out, which material for conveying thus cannot pass into the gas chamber 13.
  • Advantageous refinements of the invention are specified in the subclaims.
  • The invention will be discussed in more detail below in an exemplary embodiment, to an extent required for the purposes of understanding, on the basis of FIG. 1.
    •
  • The diaphragm pump illustrated in FIG. 1 is an apparatus composed of two pressure-resistant half-shells (1, 12) which are connected to one another in gas-tight fashion by means of a flange connection (2). The flange connection has, aside from the possibility of easy disassembly of the dust pump, the additional function of fastening and clamping the diaphragm (3) and the loosening surface (5) by means of a filter flange (4). By means of the spherical geometry, it is thus possible for an advantageous deflection, which conserves the filter material, of the diaphragm into the dust chamber in the form of a paraboloid of revolution to be realized. The deflection of the diaphragm is in this case caused by an action of force of the hydraulic liquid, as described for example in DE102016201182. Abrupt changes are avoided, and after the completion of the conveying-out process, it can be achieved that the diaphragm (3) lies substantially areally against the half-shell-shaped loosening surface (5). By means of this advantageous embodiment, a small dead volume can be achieved, which leads to a minimal dust chamber volume (10) with a simultaneously high conveying rate and low losses of high-pressure gas. To avoid undesired movements and folding during the conveying-out process, the diaphragm is guided and stabilized in terms of its movement by means of a guide rod (9). The guide rod may, in a particularly advantageous embodiment, perform additional tasks such as for example the determination of the position of the diaphragm by means of measuring position transducers.
  • The invention is furthermore based on the problem of generating dense-stream conveying, described in DE 2005047583, by generating a fluidized bed within the dust chamber. This is achieved during the charging and conveying-out process by means of a homogeneous feed of gas via a half-shell-shaped and gas-permeable loosening surface (5). As filter material for the loosening surface (5), use is made of porous metal, for example aluminum, with an adequately small pore size and filter fineness of <20 μm. It can thus be ensured that superfine dust particles do not ingress into the loosening surface during the expansion process.
  • For the production of porous metal, liquid metal, for example aluminum, together with granulated salt is cast into a half-shell mold. Salt has a significantly higher melting point for example in relation to metals such as aluminum, and does not change into the liquid state of aggregation, but rather distributes uniformly in the melt. After solidification of the metal, the salt is washed out by means of a salt-dissolving liquid, and porous and gas-permeable metal is formed. An advantage of this method consists in the possibility of performing mechanical processing prior to the washing-out of the salt crystals. In this way, clogging of the pores is ruled out. The required porosity and filter fineness is set by means of the size of the salt grains.
  • In order to realize an advantageous flange seal (2), the loosening surface (5) may be formed in two layers; as a porous metal in the lower region and as a solid material in the flange region.
  • In a particular embodiment of the invention, the half-shell-shaped casting mold of the loosening surface (5) is expanded to include additional ring-shaped and/or punctiform support elements (8). It is thus possible for the half-shell-shaped loosening surface (5) composed of porous metal to be fitted and fastened into the lower pressure-resistant half-shell (12) composed of solid material. A gas chamber 13 is advantageously formed between the loosening surface composed of porous metal and the pressure-resistant half-shell, which gas chamber can be used for the distribution of the loosening and charging gas. The feed and discharge of the loosening and charging gas is realized by openings 6 in the lower pressure-resistant half-shell 12.
  • In the case of a hydraulically driven diaphragm pump for pneumatic high-pressure conveying of fluidized dusts, the reliable sealing of the dust chamber from the hydraulic chamber, which are separated by means of the diaphragm, is of particular importance. The deflection of the diaphragm and the associated drawing-in and conveying-out of the material for conveying in dust form is achieved by virtue of the hydraulic fluid in the hydraulic chamber situated above the diaphragm being forced in and forced out. Within this conveying process, the ingress of dust into the hydraulic liquid or of hydraulic liquid into the dust chamber is associated with considerable plant malfunctions and would lead to cumbersome repairs.
  • One special feature of the invention consists in the monitoring and assurance of the diaphragm leak-tightness. For this purpose, the diaphragm (3) is designed as a double diaphragm with integrated pressure sensor for leakage monitoring. In this way, it is possible for a hermetically sealed separation between hydraulic chamber (11) and dust chamber (10) to be ensured, and damage to the diaphragm can be identified in good time. Cumbersome repair and cleaning measures of the entire dust system or hydraulics system in the event of diaphragm damage are avoided, and the leak-tightness of the diaphragm is maintained during the fault situation.
  • In the case of the diaphragm 3 being designed as a double diaphragm, two resiliently elastic diaphragms are arranged so as to be mechanically supported relative to one another such that a closed intermediate space is formed between the diaphragms, which intermediate space can be monitored by means of a pressure sensor Δp (14). During fault-free operation, the intermediate space has a pressure lower than the pressure in the hydraulics chamber or the dust chamber. If a pressure increase is now detected in the intermediate chamber, a leakage of one of the two diaphragms of the double diaphragm is inferred. The two diaphragms may be arranged so as to be mechanically supported relative to one another in punctiform fashion by virtue of a layer of balls being arranged between them. The two diaphragms may be arranged so as to be mechanically supported relative to one another by virtue of a coupling liquid being introduced between them, which coupling liquid is operatively connected to the pressure sensor Δp.
  • The resiliently elastic diaphragm may be formed with an elastomer or a solid PTFE mixture. In the case of the double diaphragm, one of the two diaphragms may be realized by means of an elastomer, and the other of the two diaphragms may be realized by means of a solid PTFE mixture.
  • The invention is also provided by means of a diaphragm pump for fluidizing and conveying dusts, in the case of which
      • the pressure-resistant housing of the dust pump is composed of two half-shells which are connected by means of a flange connection and into which a diaphragm and a loosening surface are flange-mounted,
      • the loosening surface is formed in layers from porous material in the lower region and solid material in the region of the flange connection,
      • the loosening surface is designed as a half-shell and comprises support elements, and a gas chamber exists between pressure-resistant lower half-shell and loosening surface.
  • The present invention has been discussed in detail for illustrative purposes on the basis of specific exemplary embodiments. Here, elements of the individual exemplary embodiments may also be combined with one another. The invention is therefore intended not to be restricted to individual exemplary embodiments, but rather restricted only by the appended claims.
    • LIST OF REFERENCE DESIGNATIONS
    • 1 Pressure-resistant upper half-shell, hydraulics half-shell
    • 2 Container flange
    • 3 Diaphragm
    • 4 Filter flange
    • 5 Loosening surface composed of porous metallic filter material
    • 6 Openings for charging and conveying gas, gas pipe
    • 7 Inner pipe for inlet and outlet of the dust, dust pipe
    • 8 Ring-shaped, punctiform, strip-shaped support elements
    • 9 Diaphragm guide/guide rod
    • 10 Dust chamber
    • 11 Hydraulics chamber
    • 12 Pressure-resistant lower half-shell, dust half-shell
    • 13 Gas chamber
    • 14 Pressure sensor Δp

Claims (11)

1. A method for producing a gas-permeable body which is formed with aluminum, in which method
salt is admixed to an aluminum melt,
the mixture composed of aluminum melt and salt is allowed to solidify,
the solidified mixture is processed into the desired body form, and
the salt is removed from the body form by means of a dissolution process.
2. The method for producing a gas-permeable body as claimed in claim 1,
wherein
the desired porosity and filter fineness is set by means of the size of the salt grains.
3. A gas-permeable body composed of aluminum, which is produced by means of the following sequence of working steps:
admixing salt to an aluminum melt,
solidifying the mixture composed of aluminum melt and salt,
processing the solidified mixture into the desired body form, and
removing the salt from the body form by means of a dissolution process.
4. The gas-permeable body as claimed in claim 3,
wherein a porous metallic filter material is formed.
5. The gas-permeable body as claimed in claim 4, wherein the fineness of the filter material amounts to <40 μm.
6. The gas-permeable body as claimed in claim 4,
wherein
the fineness of the filter material amounts to <20 μm.
7. The gas-permeable body as claimed in claim 3,
wherein
the gas-permeable body is connected to a gas-impermeable body so as to form a unit.
8. The gas-permeable body as claimed in claim 3,
wherein
the gas-permeable body is part of a gas-impermeable aluminum body.
9. The gas-permeable body as claimed in claim 3,
wherein
the body form is adapted to the deflected form of a diaphragm of a dust pump.
10. The gas-permeable body as claimed in claim 3,
wherein
a dust feed pipe (7) is connected at the lowest point.
11. The gas-permeable body as claimed in claim 3,
wherein
at least one support (8) is formed integrally.
US16/327,586 2016-08-25 2017-08-22 Production of a porous aluminum filter for a diaphragm pump Abandoned US20190217233A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102016216016.8 2016-08-25
DE102016216016.8A DE102016216016A1 (en) 2016-08-25 2016-08-25 Production of a porous aluminum filter for a membrane pump
PCT/EP2017/071073 WO2018036984A1 (en) 2016-08-25 2017-08-22 Production of a porous aluminium filter for a diaphragm pump

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/071073 A-371-Of-International WO2018036984A1 (en) 2016-08-25 2017-08-22 Production of a porous aluminium filter for a diaphragm pump

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/388,470 Division US11590440B2 (en) 2016-08-25 2021-07-29 Production of a porous aluminum filter for a diaphragm pump

Publications (1)

Publication Number Publication Date
US20190217233A1 true US20190217233A1 (en) 2019-07-18

Family

ID=59772595

Family Applications (2)

Application Number Title Priority Date Filing Date
US16/327,586 Abandoned US20190217233A1 (en) 2016-08-25 2017-08-22 Production of a porous aluminum filter for a diaphragm pump
US17/388,470 Active 2037-09-05 US11590440B2 (en) 2016-08-25 2021-07-29 Production of a porous aluminum filter for a diaphragm pump

Family Applications After (1)

Application Number Title Priority Date Filing Date
US17/388,470 Active 2037-09-05 US11590440B2 (en) 2016-08-25 2021-07-29 Production of a porous aluminum filter for a diaphragm pump

Country Status (5)

Country Link
US (2) US20190217233A1 (en)
EP (1) EP3503987B1 (en)
CN (1) CN109789356B (en)
DE (1) DE102016216016A1 (en)
WO (1) WO2018036984A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110529367A (en) * 2019-07-26 2019-12-03 宁波钱湖石油设备有限公司 A kind of high pressure reciprocating diaphragm pump fluid end structure

Family Cites Families (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE81606C (en)
DE568999C (en) 1933-01-27 Richard Bertram Conveyor screw for dust pumps
DE427455C (en) 1925-07-08 1926-04-10 Allg Elek Citaets Ges Fa Process for conveying dust-air mixtures
DE449676C (en) 1925-11-29 1927-09-19 Babcock & Wilcox Dampfkessel W Dust pump with compressed air delivery using the emulsion method
DE485635C (en) 1926-06-08 1929-11-02 Kohlenauswertung G M B H Dust pump with multiple air inlet
DE551066C (en) 1930-04-25 1932-05-25 Paul Griese Dust pump
DE596565C (en) 1932-04-29 1934-05-08 Internat Cement Gun Company Process for conveying a dust-air emulsion
DE650988C (en) 1932-05-20 1937-10-06 Fuller Co Dust pump with a conveyor screw that penetrates the material inlet and is cantilevered in the pump drum and at the material outlet
DE615779C (en) 1932-05-20 1935-07-12 Fuller Co Dust pump with conveyor screw and air supply at the screw outlet and adjustable distance between the air inlet and the end wing of the conveyor screw
DE656009C (en) 1933-08-11 1938-01-27 Fuller Co Dust pump with screw conveyor
DE1008201B (en) 1953-06-11 1957-05-09 Ludolf Engel Dr Ing Infeed device for pressure or vacuum containers
US3138856A (en) * 1961-10-09 1964-06-30 Dow Chemical Co Method of producing clad porous metal articles
DE1175653B (en) 1962-03-28 1964-08-13 Basf Ag Process and device for discontinuous dosing of powdery substances
DE2657677C3 (en) 1976-12-20 1979-11-15 Mittelmann Gmbh & Co Kg, 5928 Laasphe Method and device for the pneumatic conveyance of bulk materials, viscous masses, sludge or the like. in a tubular conveyor trough
DE2722931C2 (en) 1977-05-20 1987-04-30 Krupp Koppers GmbH, 4300 Essen Solid piston pump and method for its operation for conveying fine-grained to dust-like fuels
DD147188A3 (en) 1977-09-19 1981-03-25 Lutz Barchmann METHOD AND DEVICE FOR PRESSURE GASIFICATION OF DUST-SOUND FUELS
DE3035745A1 (en) 1980-09-22 1982-05-13 Adrian van 2000 Hamburg Hess Pump for handling dusty material - includes screw conveyor and soft plastics ball sealing against seat at auger outlet
US4818191A (en) 1982-03-31 1989-04-04 Neyra Industries, Inc. Double-acting diaphragm pump system
IL83259A (en) * 1987-07-20 1992-05-25 D F Lab Ltd Disposable cell and diaphragm pump for use of same
JP2544399B2 (en) * 1987-09-22 1996-10-16 山田油機製造 株式会社 Pressure chamber of diaphragm pump
DE3909800A1 (en) 1989-03-24 1990-09-27 Neuhaeuser Gmbh & Co Diaphragm pump for pneumatic delivery of fluidised bulk solids
ATE148202T1 (en) 1991-05-03 1997-02-15 Regipur Polyurethan Anlagentec MULTI-LAYER DIAPHRAGM WITH LEAKAGE Drainage FOR DIAPHRAGM PUMPS
US5560279A (en) 1995-03-16 1996-10-01 W. L. Gore & Associates, Inc. Pre-failure sensing diaphragm
DE19940498A1 (en) 1999-08-26 2001-03-22 Knf Neuberger Gmbh Diaphragm pump
DE10012902B4 (en) 2000-03-16 2004-02-05 Lewa Herbert Ott Gmbh + Co. Breathable membrane clamping
US6447216B1 (en) 2000-08-17 2002-09-10 Xerox Corporation Fluid pumping system for particulate material
WO2005012729A1 (en) 2003-08-04 2005-02-10 Nec Corporation Diaphragm pump and cooling system with the diaphragm pump
DE202005021660U1 (en) 2005-10-04 2009-03-05 Siemens Aktiengesellschaft Apparatus for the controlled supply of combustible dust in an air flow gasifier
WO2009009189A2 (en) 2007-04-20 2009-01-15 General Electric Company Transporting particulate material
DE202007019632U1 (en) 2007-11-09 2015-01-19 Erich Bauer Powder conveyor with diaphragm pump
DE102008007033A1 (en) 2008-01-31 2009-08-06 Siemens Aktiengesellschaft Dosing system
DE102008009679A1 (en) 2008-02-18 2009-08-20 Siemens Aktiengesellschaft Dust entry system
TWI461522B (en) 2008-03-05 2014-11-21 Thyssenkrupp Uhde Gmbh Continuous fuel supply system for a coal gasification reactor
DE102008052673A1 (en) 2008-10-22 2010-04-29 Uhde Gmbh Device for supplying e.g. petroleum coke, into coal gasification reactor, has lock container connected with receiver tank using connection devices, and receiver tank connected with vitrification reactor by fuel lines
DE102008049542C5 (en) 2008-09-30 2016-10-20 Siemens Aktiengesellschaft Dust metering system for high pressures through a combination of dust pump and lock
DE102009016191B4 (en) 2009-04-03 2013-04-04 Alstom Technology Ltd. Method and arrangement for improving the dynamic behavior of a coal-fired power plant at primary and / or secondary requirements of the electricity grid operator to the power delivery to the grid
US9079136B2 (en) * 2009-05-21 2015-07-14 Battelle Memorial Institute Thin, porous metal sheets and methods for making the same
US8851406B2 (en) 2010-04-13 2014-10-07 Aerojet Rocketdyne Of De, Inc. Pump apparatus including deconsolidator
DE102011007066A1 (en) * 2011-04-08 2012-10-11 Siemens Aktiengesellschaft Membrane dust pump system
DE102011052432A1 (en) 2011-04-15 2012-10-18 Reinhausen Plasma Gmbh Diaphragm pump and method for conveying fine-grained powders by means of a diaphragm pump
DE102012216084A1 (en) 2012-09-11 2014-03-13 Siemens Aktiengesellschaft Modified fluidized bed for use in gasification plants with dry fuel feed
JP6014072B2 (en) * 2014-03-20 2016-10-25 住友ゴム工業株式会社 Diaphragm fixing structure, diaphragm pump and valve device including the same
DE102014212919A1 (en) 2014-07-03 2016-01-07 Siemens Aktiengesellschaft Filter element for use in gasification plants with dry fuel feed
DE102016201182A1 (en) 2016-01-27 2017-07-27 Siemens Aktiengesellschaft Diaphragm pump with dust suction from below

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110529367A (en) * 2019-07-26 2019-12-03 宁波钱湖石油设备有限公司 A kind of high pressure reciprocating diaphragm pump fluid end structure

Also Published As

Publication number Publication date
DE102016216016A1 (en) 2018-03-15
EP3503987A1 (en) 2019-07-03
US11590440B2 (en) 2023-02-28
EP3503987B1 (en) 2022-03-16
WO2018036984A1 (en) 2018-03-01
CN109789356A (en) 2019-05-21
US20210354066A1 (en) 2021-11-18
CN109789356B (en) 2021-12-03

Similar Documents

Publication Publication Date Title
CN103557094B (en) A kind of ground experiment solid-liquid rocket high-strength hydrogen peroxide catalytic bed structure
US11590440B2 (en) Production of a porous aluminum filter for a diaphragm pump
CN108603498B (en) Diaphragm pump vacuuming from below
US20140112802A1 (en) Membrane dust-pumping system
US10781807B2 (en) Double membrane for a dust pump
US11215174B2 (en) Diaphragm pump having a porous, arched aluminum filter
EP3514416A1 (en) Injectable dynamic packings
CN201155451Y (en) Diaphragm for slurry pump and reciprocating hydraulic slurry pump using the same
CN208493425U (en) Novel inputting type bag filter
WO2004022799A1 (en) Safety mechanism
CN213966466U (en) Vacuum extraction device for defoaming agent production reaction kettle
CN205190773U (en) Disconnect -type gas accuse high temperature pulse valve
CN106398776B (en) An annular gas supply component for use in a gasification plant with a dry fuel supply
RU2424955C1 (en) Seamless fuel tank housing for rockets and method of its fabrication
JP4575804B2 (en) Decompressor
CN207478535U (en) Solid particle material feeding tank and gas-solid phase reaction device
CN205437087U (en) Vacuum die casting system
CN105314593A (en) Hydrogen generation device
CN222034643U (en) High-end imitation medicine dry method granulator
CN116625666A (en) A gas pressurization test system and method
RU2479381C1 (en) Gasostatic extruder
JP2001300351A (en) Cyclone
Vetter Reliability and Future Development of High Pressure Diaphragm Pumps for Process Service
RU95312U1 (en) HOUSING OF SEAMLESS FUEL TANK
JPH0725916U (en) Separation device

Legal Events

Date Code Title Description
STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

AS Assignment

Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HANNEMANN, FRANK;RAHM, SEBASTIAN;WEDER, MARCUS;SIGNING DATES FROM 20190321 TO 20190401;REEL/FRAME:049271/0087

Owner name: DIPL. ING. ERNST SCHMITZ GMBH & CO. KG MASCHINEN U

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SIEMENS AKTIENGESELLSCHAFT;REEL/FRAME:049271/0127

Effective date: 20190402

Owner name: DIPL. ING. ERNST SCHMITZ GMBH & CO. KG MASCHINEN UND APPARATEBAU, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SIEMENS AKTIENGESELLSCHAFT;REEL/FRAME:049271/0127

Effective date: 20190402

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: FINAL REJECTION MAILED

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION