CA2106584C - Process and installation for treating waste liquids, in particular industrial waste water with a high solids content - Google Patents
Process and installation for treating waste liquids, in particular industrial waste water with a high solids content Download PDFInfo
- Publication number
- CA2106584C CA2106584C CA002106584A CA2106584A CA2106584C CA 2106584 C CA2106584 C CA 2106584C CA 002106584 A CA002106584 A CA 002106584A CA 2106584 A CA2106584 A CA 2106584A CA 2106584 C CA2106584 C CA 2106584C
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- Canada
- Prior art keywords
- gas
- spray tower
- refrigerator
- evaporator
- waste water
- 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 - Fee Related
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
- B01D3/343—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances the substance being a gas
- B01D3/346—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances the substance being a gas the gas being used for removing vapours, e.g. transport gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/007—Energy recuperation; Heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Fertilizers (AREA)
- Removal Of Specific Substances (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention refers to a method and an apparatus for processing waste liquid, in particular industrial waste water of high solids content, characterized by the following steps:
a) spraying and evaporating the waste liquid together with a dry gas, in particular dry air in a counterflow of dry gas, in particular dry air in a spray tower, b) collecting the solids of the waste water in a lower section of the spray tower, c) discharging the moist gas from an upper section of the spray tower and bringing the moist gas in heat exchange with an evaporator of a refrigerating means,wherein the liquid condensed from the evaporator is collected, d) bringing the cooled dry gas in heat exchange with the condensor of said refrigerating means, and e) returning the heated dry gas in a closed loop to the method step a).
a) spraying and evaporating the waste liquid together with a dry gas, in particular dry air in a counterflow of dry gas, in particular dry air in a spray tower, b) collecting the solids of the waste water in a lower section of the spray tower, c) discharging the moist gas from an upper section of the spray tower and bringing the moist gas in heat exchange with an evaporator of a refrigerating means,wherein the liquid condensed from the evaporator is collected, d) bringing the cooled dry gas in heat exchange with the condensor of said refrigerating means, and e) returning the heated dry gas in a closed loop to the method step a).
Description
The present invention relates to a method for processing waste liquids, in particular industrial waste water having a high solids content.
Processing waste water, in particular industrial waste water, for separating inorganic and organic components in the water, recovering products contained therein and recirculating the water in the production cycle is performed in a plurality of ways either chemically, biologically or by a combination of various methods. Serious drawbacks arise from adding chemicals to the water or, from high energy costs. The processing of chemically loaded industrial waste water, such as electroplating waste water, and depositing concentrated slurries, both require great investments and the use of excessively expensive systems. Processing the waste water such that it may be returned to the public waste disposal system, is rather expensive. The handling of the slurries resulting from processing involves serious problems. Concentration of the slurries requires a high energy consumption.
It is the object of the present invention to provide an energy saving method for processing waste liquids, in particular industrial waste water having a high solids content, in which the solids of the liquid are recovered as dry concentrate and the water is recovered in a clean condition, eliminating a pollution of the environment.
According to the invention, there is provided a process for treating waste liquids that contain solids, characterized by the following steps: a) the waste liquid, together with dry gas, is sprayed at room temperature into a spray tower in counter-flow to the dry gas and evaporated; b) solids from the waste water are collected in the lower area of la the spray tower; c) moist gas is drawn off from the top part of the spray tower and is cooled by being passed in heat exchange relationship over the evaporator of a refrigerator, thus drying the gas by condensing liquid therefrom; d) the cooled dry gas from step c) is then passed in heat exchange relationship over the condenser of the refrigerator and heated; and e) the heated dry gas from step d) is returned in a closed cycle to step a).
The invention also provides an installation for carrying the foregoing process, the installation comprising: a spray tower having in the upper region thereof a spraying system that is supplied with waste water from a reservoir; the evaporator and the condenser forming part of a refrigerator that has a condensate water drain associated with the evaporator; a line system for the gas having an entry end connected to the upper region of the spray tower and a branched outlet end connected both to the upper region and to the lower region of the spray tower such that gas is conducted in a closed system between those ends at least through the evaporator and the condenser; a blower in the line system for circulating gas in the circuit; and a collector container for solids in the lower region of the spray tower.
Processing waste water, in particular industrial waste water, for separating inorganic and organic components in the water, recovering products contained therein and recirculating the water in the production cycle is performed in a plurality of ways either chemically, biologically or by a combination of various methods. Serious drawbacks arise from adding chemicals to the water or, from high energy costs. The processing of chemically loaded industrial waste water, such as electroplating waste water, and depositing concentrated slurries, both require great investments and the use of excessively expensive systems. Processing the waste water such that it may be returned to the public waste disposal system, is rather expensive. The handling of the slurries resulting from processing involves serious problems. Concentration of the slurries requires a high energy consumption.
It is the object of the present invention to provide an energy saving method for processing waste liquids, in particular industrial waste water having a high solids content, in which the solids of the liquid are recovered as dry concentrate and the water is recovered in a clean condition, eliminating a pollution of the environment.
According to the invention, there is provided a process for treating waste liquids that contain solids, characterized by the following steps: a) the waste liquid, together with dry gas, is sprayed at room temperature into a spray tower in counter-flow to the dry gas and evaporated; b) solids from the waste water are collected in the lower area of la the spray tower; c) moist gas is drawn off from the top part of the spray tower and is cooled by being passed in heat exchange relationship over the evaporator of a refrigerator, thus drying the gas by condensing liquid therefrom; d) the cooled dry gas from step c) is then passed in heat exchange relationship over the condenser of the refrigerator and heated; and e) the heated dry gas from step d) is returned in a closed cycle to step a).
The invention also provides an installation for carrying the foregoing process, the installation comprising: a spray tower having in the upper region thereof a spraying system that is supplied with waste water from a reservoir; the evaporator and the condenser forming part of a refrigerator that has a condensate water drain associated with the evaporator; a line system for the gas having an entry end connected to the upper region of the spray tower and a branched outlet end connected both to the upper region and to the lower region of the spray tower such that gas is conducted in a closed system between those ends at least through the evaporator and the condenser; a blower in the line system for circulating gas in the circuit; and a collector container for solids in the lower region of the spray tower.
According to the invention, a spray tower is provided to spray the waste water in a counterflow of dry gas, in par-ticular dry air. Spray towers for making granulate material are known. For drying foods or pharmaceutical products it is known to transmit warm (hot) air through the whirled bed of the product which air i.s circulated for being dried and re-cycled (German Patent 27 07 065). A similar method is known (German application 27 43 724) for spray drying perishable liquid products such as skimmed milk and whey for making powdered milk. Contrarily to a spray drying process in which the water is normally evaporated at high temperature, the present invention uses a mere vaporization of the water sprayed in the spray tower.
According to the present invention, the moist gas is brought in exchange with the evaporator of a refrigerator. Accord-ingly the gas is cooled and the moisture is condensed and collected. The water collected has a high grade of purity exceeding that of deionized water. Discharging the purified water into a water system for supplying industrial plants is thus easily possible. Discharging the purified water into a public disposal system involves no risk either.
The condensing heat of the evaporator results in a heating of the refrigerant, heating in turn the condensor of the refrigerator. The dry dehumified air coming in heat exchange with the condensor becomes heated up again. In other words, the heat energy (condensing heat) recovered from the moist gas stream in the dehumidifying step is returned to the gas stream thereby. The dry, slightly heated air is then again delivered to the spray 'tower, wherein a portion of the air is delivered to the spray tower together with spraying the waste water and a further portion defines a counterflow with respect to the sprayed water stream.
Since there is no loss of energy in the cycled gas, merely the energy for maintaining the gas cycle as well as for driving the motor of the refrigerator and spraying the waste water in the spray tower must be supplied from_outside. The method of the invention thus provides a high efficiency.
As mentioned before, the recovered~water has a high quality.
The water is free of algae or organic substances and sub-stantially has the quality of distilled water. The solids are recovered as a powder-like concentrate and may be readily recycled. As the concentrate is dried, its volume is at a minimum.
The method according to the invention does not require chemicals. As the process is performed in a closed system, there is no pollution of the environment.
To circulate the gas stream requires mechanical energy which is connected to heat energy in the circuit system so that under certain circumstances an excess of heat results which can be used in a further embodiment of the invention to heat the waste water before beilng sprayed.
Industrial plants often produce acid and alkaline waste waters. A substantial advantage of the present invention is seen in the fact that an individual processing of the waste water is not required, contrarily thereto, the various types of waste water can be mixed together and then sprayed.
According to an embodiment of the invention the sprayed waste water preferrably has a pH value of 7 to 9, i.e. it is slightly alkaline.
An apparatus for performing the method according to the invention comprises two basic~domponents, i.e. a spray tower and a refrigerator. The spray tower comprises a spraying means in an upper section thereof to be connected to a waste water reservoir. A motor-driven pump is provided in the waste water line to the spraying means. It should be under-stood that the liquid may be as well atomized pressureless by means of ultrasonic energy or the like, for example. The refrigerator, preferably a c~pressor refrigerating machine conventionally comprises an evaporator and a condensor which are used as a heat exchanger for the gas in the apparatus of the present invention which gas is circulated in a closed loop through the spray tower to vaporize the sprayed liquid and to separate the moisture as a condensate. As mentioned before, the combination of a spray tower and a refrigerator results in an extremely energy saving method, at the same time providing an optimum in processing the liquid, for io example polluted water under conditions which are not harm-ful to the environment. The dimensions of an apparatus according to the invention are compact so that it lends itself to be integrated in existing plants. The costs for manufacturing the apparatus according to the invention as well as for operation are extremely low.
A preferred embodiment of the present invention will now be described, by way of example, with reference to the accom-panying drawing. .
Fig. 1 schematically shows an apparatus according to the 2o present invention, and Fig. 2 shows a view of a spray tower according to Fig. 1.
The drawing shows a spray tower 10 having an upper section in which a spraying means 12 is provided which is connected through a line 14 to a waste water reservoir 16. A pump 18 and a heat exchanger 20 are provided in the line 14.
The lower section of the spray tower 10 accomodates a col-lecting means 22 for a concentrate of dried solids. Above the collecting means 22 there'is a conical sieve 24.
A refrigerator generally designated 30 comprises an 3o evaporator 32 of a finned structure and a condensor 34 defined by a fall-pipe evaporator. The refrigerator 30 is located in a closed compartment as indicated in dash-dotted lines 32a. The refrigerator 30 further comprises a compressor 36 which is driven by a motor 38. The evaporator 32 includes a condensate drain 40. The compartment 32a housing the heat exchanger 20 further includes a radial fan 42 which outlet communicates with a line 44 leading to a branching-off 46. Therefrom a branch line 48 leads to the top of the spray tower 10 and opens into four inlet openings 50. The second branch line 52 opens into the spray tower 10 in the lower section thereof below the conical sieve 24.
The operation of the apparatus is as follows: Waste water pumped from the reservoir 16 is sprayed in the spray tower by the spraying means 12 which water is introduced together with air from the branch line 48. The "spray stream" flows downwardly in a countercurrent of dry air which is intro-duced through the branch line 52. The flow of the latter is indicated by the arrows 54. It should be understood that proper provisions are made to obtain an intimate and uniform contact of the airstream 54 and the spray flow. The dry air introduced via the limas 52 and 48 initially has a tempera-ture of 15 to 18°C, fo:r example (room temperature). The air further contains a moi:~ture of 1 g/m3, for example. The dry air is loaded with moiature and leaves the spray tower through an upper centr~il opening 56 in the top lid of the spray tower 10 and is :supplied through a line 58 to the '- refrigerator 30. The moist air which has a moisture of 24 g/m3, for example, :Ls circulated in a heat exchange over the evaporator 32 of the refrigerator 30. The air is cooled thereby resulting in a condensation of the water which is collected in a reservo:Lr 40. The cooled dry air again having a moisture content of :L g/m3, for example, is supplied to the condensor 34 of they refrigerator 30 and is heated there as the evaporator 32 causes a heating of the refrigerant by its condensating heat which is transmitted to the dried cool air by a heat exchange process in the condensor 34. The dry air leaves the heat exchanger 34 having a temperature of 45°C, for example. Thi:~ heat is partly given off in the heat ex-changer 20 to heat up the waste water in the line 14. The heated dry air is then delivered through the line 44 to the spray tower 10 as described before.
As the artisan realizes, the air stream is circulated in a closed system which is not harmful to the environment. By adjusting the pressure as well as by controlling the extent of heating the waste water, temperature can be controlled.
When the heat exchanger 20 is eliminated, a relatively high temperature of the dry air may be obtained, since the mechanical energy for driving the fan 42 is converted to l0 heat energy. However, heating the waste water facilitates the evaporation of the sprayed water so that a total energy balance is obtained which results in an extremely high efficiency of approximately 85% of the system according to the invention.
The system is used for processing electroplating waste water, for example. The waste water is preferrably adjusted to be slightly alkaline. I,~Jeach case acid and alkaline waters may be processed in common. Generally, a plurality of various liquids may be processed according to the invention, for example to recover an electrolyte solution from the air etc.dd
According to the present invention, the moist gas is brought in exchange with the evaporator of a refrigerator. Accord-ingly the gas is cooled and the moisture is condensed and collected. The water collected has a high grade of purity exceeding that of deionized water. Discharging the purified water into a water system for supplying industrial plants is thus easily possible. Discharging the purified water into a public disposal system involves no risk either.
The condensing heat of the evaporator results in a heating of the refrigerant, heating in turn the condensor of the refrigerator. The dry dehumified air coming in heat exchange with the condensor becomes heated up again. In other words, the heat energy (condensing heat) recovered from the moist gas stream in the dehumidifying step is returned to the gas stream thereby. The dry, slightly heated air is then again delivered to the spray 'tower, wherein a portion of the air is delivered to the spray tower together with spraying the waste water and a further portion defines a counterflow with respect to the sprayed water stream.
Since there is no loss of energy in the cycled gas, merely the energy for maintaining the gas cycle as well as for driving the motor of the refrigerator and spraying the waste water in the spray tower must be supplied from_outside. The method of the invention thus provides a high efficiency.
As mentioned before, the recovered~water has a high quality.
The water is free of algae or organic substances and sub-stantially has the quality of distilled water. The solids are recovered as a powder-like concentrate and may be readily recycled. As the concentrate is dried, its volume is at a minimum.
The method according to the invention does not require chemicals. As the process is performed in a closed system, there is no pollution of the environment.
To circulate the gas stream requires mechanical energy which is connected to heat energy in the circuit system so that under certain circumstances an excess of heat results which can be used in a further embodiment of the invention to heat the waste water before beilng sprayed.
Industrial plants often produce acid and alkaline waste waters. A substantial advantage of the present invention is seen in the fact that an individual processing of the waste water is not required, contrarily thereto, the various types of waste water can be mixed together and then sprayed.
According to an embodiment of the invention the sprayed waste water preferrably has a pH value of 7 to 9, i.e. it is slightly alkaline.
An apparatus for performing the method according to the invention comprises two basic~domponents, i.e. a spray tower and a refrigerator. The spray tower comprises a spraying means in an upper section thereof to be connected to a waste water reservoir. A motor-driven pump is provided in the waste water line to the spraying means. It should be under-stood that the liquid may be as well atomized pressureless by means of ultrasonic energy or the like, for example. The refrigerator, preferably a c~pressor refrigerating machine conventionally comprises an evaporator and a condensor which are used as a heat exchanger for the gas in the apparatus of the present invention which gas is circulated in a closed loop through the spray tower to vaporize the sprayed liquid and to separate the moisture as a condensate. As mentioned before, the combination of a spray tower and a refrigerator results in an extremely energy saving method, at the same time providing an optimum in processing the liquid, for io example polluted water under conditions which are not harm-ful to the environment. The dimensions of an apparatus according to the invention are compact so that it lends itself to be integrated in existing plants. The costs for manufacturing the apparatus according to the invention as well as for operation are extremely low.
A preferred embodiment of the present invention will now be described, by way of example, with reference to the accom-panying drawing. .
Fig. 1 schematically shows an apparatus according to the 2o present invention, and Fig. 2 shows a view of a spray tower according to Fig. 1.
The drawing shows a spray tower 10 having an upper section in which a spraying means 12 is provided which is connected through a line 14 to a waste water reservoir 16. A pump 18 and a heat exchanger 20 are provided in the line 14.
The lower section of the spray tower 10 accomodates a col-lecting means 22 for a concentrate of dried solids. Above the collecting means 22 there'is a conical sieve 24.
A refrigerator generally designated 30 comprises an 3o evaporator 32 of a finned structure and a condensor 34 defined by a fall-pipe evaporator. The refrigerator 30 is located in a closed compartment as indicated in dash-dotted lines 32a. The refrigerator 30 further comprises a compressor 36 which is driven by a motor 38. The evaporator 32 includes a condensate drain 40. The compartment 32a housing the heat exchanger 20 further includes a radial fan 42 which outlet communicates with a line 44 leading to a branching-off 46. Therefrom a branch line 48 leads to the top of the spray tower 10 and opens into four inlet openings 50. The second branch line 52 opens into the spray tower 10 in the lower section thereof below the conical sieve 24.
The operation of the apparatus is as follows: Waste water pumped from the reservoir 16 is sprayed in the spray tower by the spraying means 12 which water is introduced together with air from the branch line 48. The "spray stream" flows downwardly in a countercurrent of dry air which is intro-duced through the branch line 52. The flow of the latter is indicated by the arrows 54. It should be understood that proper provisions are made to obtain an intimate and uniform contact of the airstream 54 and the spray flow. The dry air introduced via the limas 52 and 48 initially has a tempera-ture of 15 to 18°C, fo:r example (room temperature). The air further contains a moi:~ture of 1 g/m3, for example. The dry air is loaded with moiature and leaves the spray tower through an upper centr~il opening 56 in the top lid of the spray tower 10 and is :supplied through a line 58 to the '- refrigerator 30. The moist air which has a moisture of 24 g/m3, for example, :Ls circulated in a heat exchange over the evaporator 32 of the refrigerator 30. The air is cooled thereby resulting in a condensation of the water which is collected in a reservo:Lr 40. The cooled dry air again having a moisture content of :L g/m3, for example, is supplied to the condensor 34 of they refrigerator 30 and is heated there as the evaporator 32 causes a heating of the refrigerant by its condensating heat which is transmitted to the dried cool air by a heat exchange process in the condensor 34. The dry air leaves the heat exchanger 34 having a temperature of 45°C, for example. Thi:~ heat is partly given off in the heat ex-changer 20 to heat up the waste water in the line 14. The heated dry air is then delivered through the line 44 to the spray tower 10 as described before.
As the artisan realizes, the air stream is circulated in a closed system which is not harmful to the environment. By adjusting the pressure as well as by controlling the extent of heating the waste water, temperature can be controlled.
When the heat exchanger 20 is eliminated, a relatively high temperature of the dry air may be obtained, since the mechanical energy for driving the fan 42 is converted to l0 heat energy. However, heating the waste water facilitates the evaporation of the sprayed water so that a total energy balance is obtained which results in an extremely high efficiency of approximately 85% of the system according to the invention.
The system is used for processing electroplating waste water, for example. The waste water is preferrably adjusted to be slightly alkaline. I,~Jeach case acid and alkaline waters may be processed in common. Generally, a plurality of various liquids may be processed according to the invention, for example to recover an electrolyte solution from the air etc.dd
Claims (8)
1. A process for treating waste liquids that contain solids, characterized by the following steps:
a) the waste liquid, together with dry gas, is sprayed at room temperature into a spray tower in counter-flow to the dry gas and evaporated;
b) solids from the waste water are collected in the lower area of the spray tower;
c) moist gas is drawn off from the top part of the spray tower and is cooled by being passed in heat exchange relationship over the evaporator of a refrigerator, thus drying the gas by condensing liquid therefrom;
d) the cooled dry gas from step c) is then passed in heat exchange relationship over the condenser of the refrigerator and heated; and e) the heated dry gas from step d) is returned in a closed cycle to step a).
a) the waste liquid, together with dry gas, is sprayed at room temperature into a spray tower in counter-flow to the dry gas and evaporated;
b) solids from the waste water are collected in the lower area of the spray tower;
c) moist gas is drawn off from the top part of the spray tower and is cooled by being passed in heat exchange relationship over the evaporator of a refrigerator, thus drying the gas by condensing liquid therefrom;
d) the cooled dry gas from step c) is then passed in heat exchange relationship over the condenser of the refrigerator and heated; and e) the heated dry gas from step d) is returned in a closed cycle to step a).
2. A process as defined in claim 1, characterized in that the waste water prior to spraying is passed in heat exchange relationship with the gas emerging from the condenser of the refrigerator.
3. A process as defined in claim 1 or claim 2 wherein the waste liquid is industrial waste water and the gas is air.
4. An installation for carrying out the process as defined in claim 1, characterized by the following parts:
a) a spray tower (10) having in an upper region thereof a spraying system (12) that is connected to a waste water reservoir (16);
b) a refrigerator (30) that incorporates said evaporator (32) and said condenser (34), a condensate water drain (40) being associated with the evaporator (32);
c) a line system for the gas, having entry end connected to the upper region of the spray tower (10), and a branched outlet end connected both to the upper region and to a lower region of the spray tower (10), such that the gas is conducted in a closed system between said ends, at least through the evaporator (32) and through the condenser (34) of the refrigerator (10);
d) a blower (42) in the line system for circulating the gas in the circuit; and e) a collector container (22) for solids in the lower region of the spray tower (10).
a) a spray tower (10) having in an upper region thereof a spraying system (12) that is connected to a waste water reservoir (16);
b) a refrigerator (30) that incorporates said evaporator (32) and said condenser (34), a condensate water drain (40) being associated with the evaporator (32);
c) a line system for the gas, having entry end connected to the upper region of the spray tower (10), and a branched outlet end connected both to the upper region and to a lower region of the spray tower (10), such that the gas is conducted in a closed system between said ends, at least through the evaporator (32) and through the condenser (34) of the refrigerator (10);
d) a blower (42) in the line system for circulating the gas in the circuit; and e) a collector container (22) for solids in the lower region of the spray tower (10).
5. A system as defined in claim 4, characterized in that said blower is a radial blower (42).
6. A system as defined in claim 4 or claim 5, characterized in that the evaporator (32) of the refrigerator (30) is a finned structure.
7. A system as defined in any one of claims 4 to 6, characterized in that the condenser (34) of the refrigerator (30) is a drop tube evaporator.
8. The device of any one of claims 4 to 7, characterized in that a heat exchanger (20) is provided downstream of the condenser (34) which heat exchanger is provided for the waste liquid flowing to the spraying means (12).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4109276.7 | 1991-03-21 | ||
| DE4109276A DE4109276C2 (en) | 1991-03-21 | 1991-03-21 | Process and plant for the treatment of waste liquids, especially industrial waste water with a high solids content |
| PCT/EP1992/000532 WO1992016273A1 (en) | 1991-03-21 | 1992-03-11 | Process and installation for treating waste liquids, in particular industrial waste water with a high solids content |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2106584A1 CA2106584A1 (en) | 1992-09-22 |
| CA2106584C true CA2106584C (en) | 2002-01-29 |
Family
ID=6427883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002106584A Expired - Fee Related CA2106584C (en) | 1991-03-21 | 1992-03-11 | Process and installation for treating waste liquids, in particular industrial waste water with a high solids content |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0504647B1 (en) |
| JP (1) | JPH05104076A (en) |
| KR (1) | KR970006989B1 (en) |
| AT (1) | ATE125168T1 (en) |
| AU (1) | AU664169B2 (en) |
| BR (1) | BR9205800A (en) |
| CA (1) | CA2106584C (en) |
| DE (2) | DE4109276C2 (en) |
| DK (1) | DK0504647T3 (en) |
| ES (1) | ES2076582T3 (en) |
| HU (1) | HU9302656D0 (en) |
| WO (1) | WO1992016273A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4234952A1 (en) * | 1992-10-16 | 1994-04-21 | Kloeckner Humboldt Deutz Ag | Thermal drying of sludges, especially sewage sludge - sludge is atomised by jet of hot gas before being dried by further hot gas stream |
| DE4239951A1 (en) * | 1992-11-27 | 1994-06-01 | Hopf Gmbh | Concentration of washing suds - uses heated tank contg. suds, creating fine air bubbles at base, extracting volatiles at top and concentrated suds at base |
| NL1001936C2 (en) * | 1995-12-19 | 1997-06-19 | Rudolf Maria Ernest Ploum | Removal of liquids from waste products, e.g. farmyard manure |
| DE10005165B4 (en) * | 2000-02-08 | 2005-02-24 | Erich Netzsch Gmbh & Co Holding Kg | Method and device for drying pre-dewatered liquid to moist substances |
| JP2008279368A (en) * | 2007-05-10 | 2008-11-20 | Omega:Kk | Mechanism and method of treating waste water |
| DE102008056739A1 (en) * | 2008-11-11 | 2010-05-12 | Christian Wenner | Drying an air permeable substrate with warm-/hot air, useful for separating useable solid components of fermentation residues and/or sludge as fertilizer or fuel and for reducing amount of liquid fermentation residue and/or sludge |
| JP2011104478A (en) * | 2009-11-13 | 2011-06-02 | Toshihiro Abe | Water purification apparatus |
| CN105031956A (en) * | 2014-11-26 | 2015-11-11 | 安徽嘉智信诺化工有限公司 | Spray-drying device |
| CN104986817A (en) * | 2015-08-05 | 2015-10-21 | 贵州赤天化桐梓化工有限公司 | Method for treating sewage containing sulfur and ammonia during alternation working procedure of synthetic ammonia by using steam stripping method |
| EP3479104A1 (en) * | 2016-07-01 | 2019-05-08 | Hach Lange GmbH | A microfluidic process water analyzer |
| JP7096021B2 (en) * | 2018-03-20 | 2022-07-05 | オルガノ株式会社 | Evaporation concentrator |
| CN109612184A (en) * | 2018-11-13 | 2019-04-12 | 上海可瑞视冷链科技有限公司 | A kind of radiator of movable square compartment condenser |
| CN114646207B (en) * | 2022-03-21 | 2023-04-07 | 江苏国信协联能源有限公司 | Wet blue algae drying method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2326142A (en) * | 1940-02-07 | 1943-08-10 | Drying & Concentrating Company | Method of and apparatus for concentrating liquid products |
| US3311543A (en) * | 1963-05-15 | 1967-03-28 | Aqua Chem Inc | Vapor compression still for distilling impure water |
| US4019951A (en) * | 1973-07-20 | 1977-04-26 | Kragh Loren G | Magma cooling tower |
| FR2321673A1 (en) * | 1975-08-21 | 1977-03-18 | Teissedre Colette | Evaporative liq. cooling or concn. - using column with upward atomised liq. flow and air at reduced press. |
| CH612003A5 (en) * | 1976-03-02 | 1979-06-29 | Kuelling Hans Peter | |
| DE3121561A1 (en) * | 1981-05-30 | 1982-12-30 | Hans-Günther 2000 Hamburg Krugmann | Device for solvent distillation |
| DE3720408A1 (en) * | 1987-06-19 | 1988-12-29 | Peter Dr Hussmann | METHOD AND DEVICE FOR THE ENVIRONMENTALLY FRIENDLY ELIMINATION OF WASTE WATER RESULTING FROM OLIVE PRESSING |
-
1991
- 1991-03-21 DE DE4109276A patent/DE4109276C2/en not_active Expired - Fee Related
-
1992
- 1992-03-02 EP EP92103560A patent/EP0504647B1/en not_active Expired - Lifetime
- 1992-03-02 ES ES92103560T patent/ES2076582T3/en not_active Expired - Lifetime
- 1992-03-02 DK DK92103560.6T patent/DK0504647T3/en active
- 1992-03-02 DE DE59202892T patent/DE59202892D1/en not_active Expired - Fee Related
- 1992-03-02 AT AT92103560T patent/ATE125168T1/en not_active IP Right Cessation
- 1992-03-11 HU HU9302656A patent/HU9302656D0/en unknown
- 1992-03-11 WO PCT/EP1992/000532 patent/WO1992016273A1/en active Application Filing
- 1992-03-11 KR KR1019930702808A patent/KR970006989B1/en not_active IP Right Cessation
- 1992-03-11 AU AU13553/92A patent/AU664169B2/en not_active Ceased
- 1992-03-11 BR BR9205800A patent/BR9205800A/en not_active Application Discontinuation
- 1992-03-11 CA CA002106584A patent/CA2106584C/en not_active Expired - Fee Related
- 1992-03-19 JP JP4093511A patent/JPH05104076A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BR9205800A (en) | 1994-07-05 |
| AU1355392A (en) | 1992-10-21 |
| JPH05104076A (en) | 1993-04-27 |
| ATE125168T1 (en) | 1995-08-15 |
| HU9302656D0 (en) | 1994-03-28 |
| DE59202892D1 (en) | 1995-08-24 |
| CA2106584A1 (en) | 1992-09-22 |
| WO1992016273A1 (en) | 1992-10-01 |
| DE4109276A1 (en) | 1992-09-24 |
| AU664169B2 (en) | 1995-11-09 |
| EP0504647B1 (en) | 1995-07-19 |
| DE4109276C2 (en) | 1994-08-04 |
| EP0504647A1 (en) | 1992-09-23 |
| ES2076582T3 (en) | 1995-11-01 |
| KR970006989B1 (en) | 1997-05-01 |
| DK0504647T3 (en) | 1995-11-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |