DE588040C - Process for the pretreatment of hot gases to be cleaned electrically - Google Patents

Process for the pretreatment of hot gases to be cleaned electrically

Info

Publication number
DE588040C
DE588040C DES92736D DES0092736D DE588040C DE 588040 C DE588040 C DE 588040C DE S92736 D DES92736 D DE S92736D DE S0092736 D DES0092736 D DE S0092736D DE 588040 C DE588040 C DE 588040C
Authority
DE
Germany
Prior art keywords
pretreatment
gases
hot gases
cleaned
electrically
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.)
Expired
Application number
DES92736D
Other languages
German (de)
Inventor
Hans Wachter
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
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 Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Priority to DES92736D priority Critical patent/DE588040C/en
Application granted granted Critical
Publication of DE588040C publication Critical patent/DE588040C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B03C3/014—Addition of water; Heat exchange, e.g. by condensation

Landscapes

  • Electrostatic Separation (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Description

Verfahren zur Vorbehandlung elektrisch zu reinigender heißer Gase Heiße Gase, insbesondere Hochofengase, lassen sich in elektrischen Gasreinigern häufig deshalb nur schwer behandeln, weil sie infolge,ihres Ursprungs sogenannte parasitäre Ladungen besitzen, welche die Leitfähigkeit der Gase sehr stärk herabsetzen. Um diese unerwünschte Ionisation der zu reinigenden Gase zu beseitigen, hat man u. a. vorgeschlagen, die Gase bis unter den Taupunkt abzukühlen, um sie dadurch zu entionisieren. Darauf werden die Gase, ohne daß eine Wiederionisation eintreten kann, auf indirektem Wege so weit erwärmt, daß sie für die Behandlung in dem elektrischen Gasreiniger genügend trocken sind. Im folgenden wird nun ein gegenüber dieser Vorbehandlung verbessertes Verfahren gezeigt..Process for the pretreatment of hot gases to be electrically cleaned Hot gases, especially blast furnace gases, can be used in electric gas cleaners often difficult to treat because they are so-called as a result of their origin have parasitic charges, which reduce the conductivity of the gases very strongly. In order to eliminate this undesirable ionization of the gases to be cleaned, one has i.a. suggested to cool the gases below the dew point in order to thereby reduce them to deionize. The gases are thereupon without re-ionization occurring can, indirectly heated so far that they are ready for treatment in the electric Gas cleaners are sufficiently dry. The following is a comparison of this pretreatment improved procedure shown ..

Gemäß der Erfindung werden die elektrisch zu reinigenden Gase nur bis in die Nähe des Taupunkts abgekühlt und dann durch Ver. mischen mit ungekühltem Rohgas wieder erhitzt. Vorteilhaft geht man dabei in der Weise vor, daß von, dem zu reinigenden Hauptgasstrom ein Teilstrom abgezweigt und mit dem durch einen Kühler hindurchgegangenen Hauptgasstrom wieder vermischt wird. Versuche haben gezeigt, daß in den meisten Fällen eine Abkühlung bis in die Nähe des Taupunkts unter Erhaltung der latenten Verdampfungswärmevollkommen ausreichend ist, um eine genügende Entionisation. derselben zu erzielen. Zur Wiedererwärmung des abgekühlten Gasstromes genügt es dann auch, einen verhältnismäßig geringen Teil des heißen Rohgasstromes hinzuzumischen, ohne daß dadurch eine Wiederionisation zu befürchten wäre. Das neue Verfahren besitzt daher den Vorteil, daß es einfacher und billiger als die bisherige Art der Vorbehandlung ist.According to the invention, the gases to be electrically cleaned are only cooled down to near the dew point and then through Ver. mix with unrefrigerated Raw gas reheated. It is advantageous to proceed in such a way that from, the Main gas flow to be cleaned branched off a partial flow and with that through a cooler the main gas flow which has passed through is mixed again. Tests have shown that in most cases a cooling down to the vicinity of the dew point with preservation the latent heat of vaporization is perfectly adequate for sufficient deionization. to achieve the same. It is sufficient to reheat the cooled gas stream then also to mix in a relatively small part of the hot raw gas stream, without the fear of re-ionization. The new procedure owns hence the advantage that it is simpler and cheaper than the previous type of pretreatment is.

Claims (1)

PATENTANSPRUCH: Verfahren zur Vorbehandlung elektrisch zu reinigender heißer Gase durch Abkühlen und Wiedererwärmen derselben vor ihrem Eintritt in das Elektrofilter, dadurch gekennzeichnet, daß die Gase nur bis auf eine noch oberhalb des Taupunkts liegende Temperatur abgekühlt und dann durch Vermischen mit ungekühItem Rohgas wieder erhitzt werden.PATENT CLAIM: Process for the pretreatment of electrically cleanable hot gases by cooling and reheating them before they enter the Electrostatic precipitator, characterized in that the gases only except for one above the temperature lying below the dew point and then by mixing with uncooled items Raw gas can be reheated.
DES92736D 1929-07-11 1929-07-11 Process for the pretreatment of hot gases to be cleaned electrically Expired DE588040C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES92736D DE588040C (en) 1929-07-11 1929-07-11 Process for the pretreatment of hot gases to be cleaned electrically

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES92736D DE588040C (en) 1929-07-11 1929-07-11 Process for the pretreatment of hot gases to be cleaned electrically

Publications (1)

Publication Number Publication Date
DE588040C true DE588040C (en) 1933-11-11

Family

ID=7517429

Family Applications (1)

Application Number Title Priority Date Filing Date
DES92736D Expired DE588040C (en) 1929-07-11 1929-07-11 Process for the pretreatment of hot gases to be cleaned electrically

Country Status (1)

Country Link
DE (1) DE588040C (en)

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