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WO2003018168A1 - Reacteur chimique equipe d'un regulateur de niveau et permettant de traiter de la boue de poils contenant du sulfure de sodium - Google Patents

Reacteur chimique equipe d'un regulateur de niveau et permettant de traiter de la boue de poils contenant du sulfure de sodium Download PDF

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Publication number
WO2003018168A1
WO2003018168A1 PCT/EP2002/009176 EP0209176W WO03018168A1 WO 2003018168 A1 WO2003018168 A1 WO 2003018168A1 EP 0209176 W EP0209176 W EP 0209176W WO 03018168 A1 WO03018168 A1 WO 03018168A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
level
pump
valve
gas space
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.)
Ceased
Application number
PCT/EP2002/009176
Other languages
German (de)
English (en)
Inventor
Rainer Dorstewitz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2003018168A1 publication Critical patent/WO2003018168A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0063—Regulation, control including valves and floats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/2415—Tubular reactors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00002—Chemical plants
    • B01J2219/00004—Scale aspects
    • B01J2219/00006—Large-scale industrial plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00002—Chemical plants
    • B01J2219/00027—Process aspects
    • B01J2219/0004—Processes in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00182—Controlling or regulating processes controlling the level of reactants in the reactor vessel

Definitions

  • the invention relates to a chemical reactor, in particular for processing sodium sulphide-containing hair sludge, with at least one column which has a liquid filling and an internal gas space at the top, with a pump which feeds circulating gas into the liquid from below and optionally together with it sucks a reaction gas to be separated from a separating device out of the inner gas space, and with a device controlled by a fill level controller for generating a negative pressure in the inner gas space, with which the working level is kept at a predetermined level above a reference level.
  • the column is treated with aqueous sodium sulfide-containing hair sludge from a depilatory system for skins and acidic circulating water.
  • the resulting hydrogen sulfide is suctioned off together with the inert cycle gas, for example nitrogen, and removed from the cycle gas with the aid of an absorber.
  • the lower part of the column is connected to an open container by a liquid seal. Its liquid level defines the reference level. The vacuum in the interior gas space to improve the desorption of the hydrogen sulfide and prevents the escape of this toxic 'gas at a leak.
  • a vacuum source is used to generate the vacuum, which can be connected to the suction side of the pump via a valve regulated by the liquid level.
  • This vacuum source is complex, especially since it must at least be able to generate the vacuum corresponding to the working level. You also need a high-quality valve, - which allows a precise setting of the opening cross-section of the valve for control purposes. In addition, there is the problem of recirculating gas that is extracted without affecting the control process.
  • the invention has for its object to perform a simple and safe level control in a chemical reactor at a predetermined negative pressure in the gas space.
  • the pump is connected to an external gas space both on the suction side and on the pressure side, the pressure of which is above the lower pressure, but is below the pump pressure, and the suction valve for lowering and the pressure valve for raising the working level can be opened.
  • the pump not only serves to drive the cycle gas, but also to generate the negative pressure. There is no need for a separate vacuum source. Since the pressure in the outer gas space should be above the required negative pressure, very simple means are sufficient, e.g. a prestressed pressure accumulator, or pressure-influencing means can be dispensed with entirely, namely if the atmospheric pressure is also used for the outer gas space.
  • the valves can have a very simple structure. An on-off function is sufficient to perform its task. Since gas is both removed from the circuit and introduced into it during regulation, the amount of circulating gas remains constant on average. In operation, very small amounts of gas, which are introduced into or removed from the circuit, are sufficient to effect level control in a large reactor.
  • the solution is particularly simple if the two valves open to the atmosphere. This is possible if an inert or non-toxic cycle gas, e.g. N 2 , is used, which can be easily released into the atmosphere, and if the atmospheric oxygen does not interfere with the entry into the cycle, be it because of its extremely small amount, either because it leads to oxidation in a harmless way.
  • the fill level controller has two probes defining an upper and a lower limit level and that the pressure-side valve opens when the value falls below and the suction-side valve when the upper limit level is exceeded. With the help of simple on-off valves, the working level can be kept constant within narrow limits.
  • the hair sludge reactor shown in the single figure has a first column 1 with a liquid filling 2 and an inner gas space 3, and a second column 4 with liquid filling 5 and an inner gas space 6.
  • the inner gas space of the first column is supplied with hair sludge 7 via a line, which is formed by treating the outside of a hide with aqueous sodium sulfide and then separating the hair.
  • the liquid filling 2 is fed via a line 8 to circulating water, which is adjusted to a predetermined pH in the lower region of the first column 1 using an acid, such as hydrochloric or sulfuric acid.
  • the hair / liquid mixture is introduced from the top of column 1 via an overflow line 9 into the lower part of column 4.
  • a line 10 acting as a liquid seal leads to an open container 11, which is filled up to a reference level 12 with liquid 13, here the processed hair mud.
  • This sludge runs, for example, via a run-off track 14 onto a screening and pressing device 15, in which the water is separated into a container 16 and dewatered hair sludge can be removed at the end 17 for further use as fertilizer or feed.
  • the water 18 collected in the container 16 is returned to the column 1 via a line 19 and a pump 20.
  • a pump 21 feeds an inert circulating gas, for example nitrogen, into the lower end of the column 1 via a pressure line 22.
  • a pump 23 feeds this recycle gas into the lower end of the column 4 via a pressure line 24.
  • the common line section 26 there is a separating device 27 which separates the reaction gas from the recycle gas and is formed, for example, by an absorber.
  • the common line section leads to the suction sides the two pumps 21 and 23. Because of the suction effect, the working level '28 in the two columns 1 and 4, the height h raised above the reference level 12th As a result of this negative pressure and the circulating gas passing through the liquid, the reaction gas is very well desorbed from the liquid.
  • a fill level control device 29 comprises a fill level sensor 30 assigned to the column 4 with a probe 31, which defines an upper limit level, and a probe 32, which defines a lower limit level.
  • a pressure-side valve 33 or a suction-side valve 34 are actuated.
  • the pressure-side valve 33 lies in a line 35, which connects the pump pressure side 22 to an outer gas space 36, which is under atmospheric pressure.
  • the suction-side valve 34 lies in a line 37- which connects the suction side of the pump 21 with this outer gas space 36.
  • the two valves are solenoid valves, which release a small throttle opening when excited.
  • the suction-side valve 34 opens when both probes are wetted.
  • the pressure-side valve 33 opens when no probe is wetted. Both valves are closed when only the lower probe is wetted. In this way, a working level between the two probes 31 and 32 is maintained.
  • the reactor can also be equipped with only one column. It 'can also be more connected as two columns in series. To further accelerate and even out the reaction, the columns with a pulsator can improve the vortex formation Perforated disks or with motor-driven mixers, separated by perforated disks.
  • the outer gas space can, for example, have atmospheric pressure or be formed by a container, one wall of which is provided with a movable wall, such as a membrane, which is exposed to atmospheric pressure. If necessary, this membrane can also be biased by a different pressure, in particular by the reference pressure which acts on the reference level 12 if this does not correspond to the atmospheric pressure.
  • the valves 33 and 34 can also be controlled with a float switch.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)

Abstract

La présente invention concerne un réacteur chimique comprenant au moins une colonne (1, 4) qui présente un contenu liquide (2, 5) et un espace interne gazeux (3, 6). Une pompe (21) aspire de l'espace interne gazeux (3) du gaz en circulation et l'intègre au liquide (2) par en-dessous. Les espaces internes gazeux (3, 6) sont ainsi soumis à une dépression. La pompe est respectivement reliée côté aspiration et côté pression à un espace externe gazeux (36) par l'intermédiaire d'une vanne (33, 34). La pression de cet espace externe gazeux est supérieure à ladite dépression, mais inférieure à la pression de la pompe. Afin de faire descendre le niveau de travail du liquide, la vanne côté aspiration (34) est ouverte de façon à ouvrir la vanne côté pression (33).
PCT/EP2002/009176 2001-08-23 2002-08-16 Reacteur chimique equipe d'un regulateur de niveau et permettant de traiter de la boue de poils contenant du sulfure de sodium Ceased WO2003018168A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001140392 DE10140392A1 (de) 2001-08-23 2001-08-23 Chemischer Reaktor, insbesondere zur Aufbereitung von Natriumsulfid aufweisendem Haarschlamm
DE10140392.5 2001-08-23

Publications (1)

Publication Number Publication Date
WO2003018168A1 true WO2003018168A1 (fr) 2003-03-06

Family

ID=7695768

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/009176 Ceased WO2003018168A1 (fr) 2001-08-23 2002-08-16 Reacteur chimique equipe d'un regulateur de niveau et permettant de traiter de la boue de poils contenant du sulfure de sodium

Country Status (2)

Country Link
DE (1) DE10140392A1 (fr)
WO (1) WO2003018168A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008030714A1 (de) * 2008-06-27 2009-12-31 Hydac Cooling Gmbh Einrichtung zum Absondern gasartiger Bestandteile, insbesondere von Luft, aus flüssigen Betriebsmedien

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE122938C (fr) *
US5211842A (en) * 1992-01-07 1993-05-18 Conoco Inc. Three-phase well test apparatus using pumped recirculation to maintain homogenous flow
US5544672A (en) * 1993-10-20 1996-08-13 Atlantic Richfield Company Slug flow mitigation control system and method
WO1998034709A1 (fr) * 1997-02-06 1998-08-13 Jens Pannenborg Procede pour degazer des liquides
US6171367B1 (en) * 1997-06-05 2001-01-09 Taiwan Semiconductor Manufacturing Co., Ltd Method and apparatus for delivering and recycling a bubble-free liquid chemical

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE122938C (fr) *
US5211842A (en) * 1992-01-07 1993-05-18 Conoco Inc. Three-phase well test apparatus using pumped recirculation to maintain homogenous flow
US5544672A (en) * 1993-10-20 1996-08-13 Atlantic Richfield Company Slug flow mitigation control system and method
WO1998034709A1 (fr) * 1997-02-06 1998-08-13 Jens Pannenborg Procede pour degazer des liquides
US6171367B1 (en) * 1997-06-05 2001-01-09 Taiwan Semiconductor Manufacturing Co., Ltd Method and apparatus for delivering and recycling a bubble-free liquid chemical

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008030714A1 (de) * 2008-06-27 2009-12-31 Hydac Cooling Gmbh Einrichtung zum Absondern gasartiger Bestandteile, insbesondere von Luft, aus flüssigen Betriebsmedien

Also Published As

Publication number Publication date
DE10140392A1 (de) 2003-03-06

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