Classifications

• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
• • 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
  • B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
  • B01J39/04—Processes using organic exchangers
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases

Definitions

• the invention relates to a method for treatment of raw water, wherein the salt content of the raw water will at least part ⁇ ly be removed.
• the invention also relates to an apparatus for treatment of raw water having at least one ion exchanger, whith the aid of which the method in this invention can pre ⁇ ferably be realized.
• spe ⁇ cially treated water is used as energy transfering agent in fluid or steam state. Since, during the operation of the heat supplying system, a portion of the treated water gets lost, it has to be substituted. In both cases, the water must be treated befor entering the heat supply system.
• This treatment of the water includes, essentially, the softening of the wa ⁇ ter and the at least partly removal of the salt content of the water.
• the water treatment is conventionally carried out with the help of at least one ion exchange process.
• cation exchangers and anion exchangers are used as is described in e. g. DE-PS 19 06 529 and in DE-OS 36 07 123. These apparatusses must be regenerated which result in a row of economical and pollutional inconvenien- cies .
• regenerates produced in the process of salt removing can fur ⁇ ther be utilized. In a preferred realization, they can be - ⁇ -
• a cation exchanger, an anion exchanger and a degasifier are connected to one another in series, wherein the raw water is let into the cation exchanger and the treated water is led away from the degasifier.
• the treatment of raw water is solved en the basis of a different approach as conventional- ly.
• the salt content of the raw water will be changed into volatile components and these will be removed as gases by de- gasifying.
• the regenerates used in the method of the inven ⁇ tion will further be utilized as e . g. soil-ameliorating materials.
• the preferred embo- die ent of the apparatus in this invention has a cation ex ⁇ changer 1 , through an inlet 2 of which the raw water to be treated is let into cation exchanger .
• an inlet 3 of an anion exchanger 4 is connected, the outlet side of which is connected to an inlet 5 of a degasifier 6.
• Both of cation exchanger 1 and anion ex ⁇ changer 4 are in connection at their outlet side also with a tank 7 collecting the regenerates comming from cation exchan ⁇ ger 1 and anion exchanger 4.
• the cation content of the raw water to be treated will be substituted for NH, + in cation exchanger 1 having H ⁇ ionic form.
• the fluid will be forwarded through inlet 3 into anion exchanger 4 being slightly basic and ' having OH ionic form.
• the strong acid producing anion content of the fluid will be substituted for OH ions.
• the treated fluid contains ammonium hydrogen carbonate in an amount cor ⁇ responding to the salt content and the hydrogen carbonate content of the raw water, and it contains ammonium hydroxid depending on the strong acid producing anion content.
• R k -NH + + NaCl R k -Na ++ + NH C1 ; etc., wherein R,- is a cation substituting agent
• Ra-OH_ + NH4.C1 Ra-Cl + NH4,,0H
• regenera- ting agents as follows can be used:
• regenerate of anion exchanger 4 can also be used for the regeneration of cation exchanger 1 , especial-
• the eluates produced with the regeneration is led from cation exchanger 1 and anion exchanger 4 into tank 7, wherefrom it can be spred out on the soil to be amelioritated.
• the raw water will be led through inlet 2 into cation exchan ⁇ ger 1 wherein it will be treated as described in Example 1 and the cation content will be substituted for NH. + ions. Thereafter, however, it will be forwarded through inlet 3 in ⁇ to anion exchanger 4 being strongly basic wherein, the strong acid producing anion content of the fluid will be substituted for OH- ions. Thereafter, the treated fluid contains NH 4 0H in an amount corresponding to the original salt content of the raw water which will leave the fluid in degasifier 6 during the warm degasifying almost entirely.
• the chemical reactions in cation exchanger 1 are during this operation the same as in Example 1.
• Ra- is an anion substituting agent
• the raw water will be led through inlet 2 into cation exchan ⁇ ger 1 wherein it will be treated as described in Example 1 and the cation content will be substituted for NH 4 ions. Thereafter, however, it will be forwarded through inlet 3 in ⁇ to anion exchanger 4 being strongly basic and having NOp form, wherein the strong acid producing anion content of the fluid will be substituted for nitrite ions. Thereafter, the treated fluid contains ammonium nitrite in an amount corres ⁇ ponding to the original salt content of the raw water which will be dissociated into ? gas and water on the temperature of the warm degasifying. The ? gas will leave the fluid in degasifier 6.
• the fluid will further be treated as shown in Example 1 with the exemption that anion exchanger 4 will be regenerated with the following agent:
• the salt content of the rege- nerate is between 10 and 50 g/dm depending on the efficiency of the collection of the eluting agent.
• the total salt concnetration is about 1 to 5 percent.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• Hydrology & Water Resources (AREA)
• Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Water Supply & Treatment (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Treatment Of Water By Ion Exchange (AREA)
• Physical Water Treatments (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=10971226

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (2)

Citations (6)

• 1987
  • 1987-12-30 HU HU611787A patent/HUT50732A/hu unknown
• 1988
  • 1988-12-28 WO PCT/HU1988/000086 patent/WO1989006221A1/en unknown
  • 1988-12-28 AU AU28178/89A patent/AU2817889A/en not_active Abandoned
  • 1988-12-30 CN CN 89100902 patent/CN1035481A/zh active Pending

Patent Citations (6)

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