DE102009007276A1 - Container for feed water of steam generators in laundries in e.g. washing machine, has pipeline for removing steam, water and gaseous medium, and another pipeline provided for discharge of distillate of condensate of steam generators - Google Patents

Abstract

The container (1) has a steam-condensate system, and a pipeline (3) for removing steam, water and gaseous medium. Gases such as oxygen and carbon dioxide, and steam are discharged from feed water or a mixture of feed water and condensate. Another pipeline (2) is provided for discharge of distillate of the condensate of steam generators in the container. The latter pipeline is provided for connecting to a heat source. The latter pipeline in the container is designed as a feed pipe in an upwardly opened hollow body. A heat exchanger is provided for heating the concentrate. An independent claim is also included for a method for degassing feed water of steam generators in a container.

Description

The The invention relates to a container for feed water according to the preamble of claim 1 and a method according to the Preamble of claim 9.

State of the art

About feed water tank for providing water for the operation of steam generators and for formation and distribution of the heat transfer steam over steam condensate networks, in which first evaporates the water and flows back into the steam generator after the heat release and condensation, it is known that in the Water dissolved gases z. As oxygen O ₂ and carbon dioxide CO ₂ are expelled before the task of feedwater in the steam generator to reduce corrosion by pitting and general acid attack by carbon dioxide, CO ₂ . Generally, the presence of the dissolved gases in the feedwater causes further losses of heat and loss of water. These losses are due to the fact that a discharge of (liquid) concentrate, H ₂ O from the boiler in the form of a blowdown or blowdown is necessary.

Further is of containers for feed water, which are preferred for smaller steam generators for a reception of recirculated Condensate are set up, known to be in these containers a mixing of fresh feed water with the condensate from the Network takes place. As is known, mixing the Liquids that are dissolved in fresh water Gases are distributed in the mixture to the entire amount. This causes in the production of steam, that too with the recirculated Condensate gases are entered into steam generator. Disadvantage is that the production of steam with high losses of heat and water at a thermal efficiency of 60% is.

One Another disadvantage of the procedure with the mixing is that z. B. in laundries with the returned Condensate more gases are registered, as a proportionate by the feed water; Cause is the ratio of recycled Condensate and to the amount of feed water.

From steam generators in laundries another disadvantage is known in the way that condensate is cooled and arise in the feed water tank mixtures of water below 100 ° C. Disadvantage is that above the water, an atmosphere of air and oxygen O ₂ is formed and thereby the outgassing is slow or comes to a standstill because of the oxygen content in the atmosphere.

Another Disadvantage is that corresponding to a five-fold excess condensate to feedwater, which is six times the amount of oxygen is entered in boiler of steam generators. Disadvantage is high operating costs.

A further cost burden arises from the fact that with the losses At steam also losses and costs for the consumption of Water are connected.

The Invention deals with a degassing of feed water and with the escape of gases dissolved in the feed water from the liquid into one above the feed water layer which is preferably formed from vapors becomes.

From the publication DE 197 12 993 A1 has become known an apparatus for heating and degassing of water. In the apparatus according to this document, water for heating and degassing is passed in countercurrent to an ascending vacuum vapor. This degassing is associated with the disadvantage that by operating under vacuum, a vapor released with the degassing is not used. Another disadvantage: It consumes electrical energy to divert the gases from the vacuum.

From the publication DT 15 51 022 a steam generator with an evaporation vessel for the evaporation of condensate has become known. In the evaporation vessel according to this document, water for heating and evaporation is evaporated by a task of superheated steam in the condensate. This evaporation of condensate has the disadvantage that the heat of condensation of the steam is not used and therefore a large amount of steam is discharged from the evaporator. Disadvantage is that with the release of gases, these gases are also distributed to the originally superheated steam.

Another disadvantage is a high heat demand. It is true that it is sufficient to degas the condensate at the start of boiling. As is known, the so-called volatile gases escape O ₂ and CO ₂ at the beginning of boiling out of the water; there it is not necessary that water is evaporated altogether.

An arrangement for the recovery of heat and condensate from steam, feedwater and condensate losses, which are passed in steam power plants with closed water-steam cycle in an open condensate tank, is from the document DD 228 865 A1 known. In this arrangement, a jet pump for discharging gaseous media is connected to a Ausdampfleitung of the open condensate tank via another pipe. Disadvantage is that the container is open and above the cold condensate and cold feed water, a cover layer of oxygen-containing air is stored in an open container. Disadvantage is that the outgassing comes to a halt by the cover of the liquid with air.

Another disadvantage is a high consumption of heat and water consumption by remaining in the liquid gases, O ₂ and CO ₂ .

The above prior art for the operation of steam generators, in particular for supplying a steam generator with a steam condensate network with water, which is degassed in a container for feedwater, is associated with the problem that with regard to the degassing of the feedwater and a Mixture of feedwater and condensate are given no favorable conditions for the escape of gases from the liquid and that a generation of steam is associated with losses of heat and losses of water H ₂ O. In particular, high losses are observed in that a waste heat contained in the desalting and Abschlämmmengen is not used.

specially losses from laundries have become known that undercooled condensate the food container is fed and degassed condensates high absorption capacity for gases and for the transport of gases to the steam generator exhibit.

task The invention is a container for feed water to propose in connection with steam generators, in which under favorable operating conditions degassing of the feedwater is guaranteed and in these operating conditions a use of heat content in the gases possible is. Next, these operating conditions should be set up Be that degassing in a safe process is possible and within the structural conditions Of steam generators can also be retrofitted. Another task is to save energy and spare resources become.

The Task is starting from a prior art of the introductory mentioned type by the characterizing features of claim 1 solved.

advantageous Embodiments and developments of the invention are after to claim 9 and by in the dependent claims 2 to 8 and 10 to 13 mentioned measures possible.

essential Feature of the invention is accordingly that a Pipeline for the discharge of distillate from concentrate from steam generators is provided in the container and preferably the pipeline is provided for connection of a heat source.

Accordingly characterized by a container for feedwater thereby from that starting from a degassing for feedwater and a recovery of steam, a pipeline for distillate is provided from concentrate of steam generators and in particular the pipeline for connecting a heat source is provided

essential Advantage consists in the derivation of the concentrate from steam generators via the container itself, that the concentrate and distillate of the concentrate from steam generators, which surplus as Blowing and desalination is obtained, with a Piping over or to the container derived becomes. Because of this pipeline, it is possible that a heat contained in the concentrate is used and that a flash vapor contained in the concentrate for Mass transfer operations used in the container becomes.

Another advantage is that when the atmosphere in the container is replaced by steam or distillate, an air and oxygen O ₂ stored above the liquid are displaced.

Another The advantage is that gases released from the liquid in an atmosphere exchange from the container be derived.

The advantage is that the air cushion with an oxygen content of 20.99 Vol% O _{2 is} derived and changed conditions are set up with the expulsion of gases.

One An essential advantage is the thermal process control in the way that starting from a degassing in an air cushion, the sluggish runs through in the container Abandonment of distillate from concentrate boiling conditions possible become. The advantage is that boiling processes are driving away of gases.

Another Advantage is that the gases in a boiling process with the distillate escape and a gas-free concentrate, namely the feed water remains.

advantage is a smaller construction due to rapid expulsion of Gases.

One substantial advantage exists for laundries too in that by the boiling process, a vapor is generated, which as Heat transfer medium at 1 bar in wet process z. B. one Laundry can be used.

advantage is that energy is saved and less water is lost.

One Another advantage is that the concentrate, which as a slurry and desalting occurs as a heat transfer medium derived from the feedwater tank and at an efficiency of 104% can be used.

One Another advantage results from the fact that the heat transfer medium stored as a concentrate in the boiler. Advantage is that the warmth is available.

One Another advantage is that a pipe to the container is provided for the removal of steam. Advantage is that cheap Operating conditions are given when out of pipelines gaseous media are removed. It is so that laundries have an excess of heat have, then the pipe is advantageously filled with steam and unfavorable operating conditions z. B. a Influence of air is not provided.

A advantageous embodiment of the invention is given by the fact that provided the pipeline for connecting a heat source is. Advantageously, a connection to this pipeline the heat source produced in steam generators. It is thus possible, the concentrate, which as a slurry and obtained as blowdown in the production of steam, to use. The advantage is, it is a clean relaxation steam than Distillate and a heat for use at an efficiency of> 100% available.

Another Advantage, smaller wastewater volumes and less heat loss with the sewage.

A advantageous embodiment of the invention is given by the fact that the pipeline intended to receive concentrate and distillate is. So it's possible that in the pipeline next to Distillate also concentrate is promoted. Advantage is if the pipeline for distillate z. B. with a Speed of 15 meters per second is dimensioned at the same time the concentrate of the distillate can be promoted.

A advantageous embodiment of the invention is given by the fact that the pipeline in the container as a supply line in one is provided upwardly open hollow body. Advantage is that relaxed concentrate remains in the hollow body and a clean distillate, namely steam, the free space can fill in the container.

Another advantage is a limited solubility of gaseous media z. B. O ₂ and CO ₂ under a cover with steam, H ₂ O.

A advantageous development of the invention results from the fact that a pipeline for the discharge of concentrate is provided. about This pipeline is derived concentrate after use as a heat source. The advantage is that the drainage and desalination volumes as a whole are over to be drained and heat and Material streams are taken as distillate.

An advantageous development of the invention is given by the fact that the pipe is provided with an overflow from the hollow body. With this overflow, it is possible that relaxed concentrate can flow out of the container. Advantage is that the amounts and the heat content of in the overflow flowing concentrate through the formation of distillate are smaller.

An advantageous embodiment of the invention results from the fact that a heat exchanger for overheating of steam, H ₂ O is provided. Advantageously, the gaseous media discharged in the pipeline for removal can be overheated in this heat exchanger. Advantage is a compact design of the container and easy installation.

A advantageous embodiment of the invention is that a heat exchanger is intended for heating with concentrate. advantage is that over a pipeline a derivative of concentrate to remove heat is possible.

A advantageous training is that a heat exchanger is intended for heating with steam. Advantages are, a good heat utilization by an indirect heating by means of steam and a direct supply of the condensate as a heat carrier in the container.

A Further advantageous embodiment of the invention results from a Method for degassing feed water from steam generators in the Way that through piping to drain distillate from concentrate from steam generators in the container, for degassing formed of feed water a steam atmosphere becomes.

• (1) Gase unter einer dampfförmigen Atmosphäre besser ausgetrieben werden;
• (2) Abwärme bei einer Effizienz > 100% genutzt wird;
• (3) Energie eingespart wird;
• (4) Abwasser reduziert wird.

Advantages of this method according to the invention are that

• (1) Gases are better driven out under a vapor atmosphere;
• (2) waste heat is used at an efficiency>100%;
• (3) energy is saved;
• (4) Wastewater is reduced.

A advantageous embodiment of the invention Process is given by the fact that the steam-containing atmosphere through a task of concentrate and distillate in one, in the container located and upwardly open hollow body formed becomes. Advantage is: the outgassing of the distillate is in the container carried out for feed water and released Heat and material flows can be immediate be used in a treatment with distillate.

A advantageous training is that in a filling contained concentrate via a pipe formed as overflow is derived on the hollow body. Advantage is that the residue Concentrate is reliably discharged.

A further advantageous embodiment of the invention is provided in that gaseous media and vapors, H ₂ O are discharged via a pipe for removal. The advantage is that even distillate from concentrate is discharged via this pipeline for removal.

advantage are savings through shared use of existing installations for feed water to make distillates from concentrate as Heat transfer medium for exchanges to use.

embodiment

embodiments The invention are illustrated as a drawing and are based on the Figures explained in more detail below.

in the Show individual

1 a perspective view of a container with a pipeline for distillate.

2 a perspective view of a container for the discharge of distillate and concentrate.

In 1 is a perspective view of a container according to the invention and destined for a supply of distillate 1 what in the present case the container 1 for feed water in connection with an infeed pipeline 2 for the discharge of distillate from concentrate from steam generators and a pipeline 3 for the removal of steam, H ₂ O and gaseous media.

In another embodiment of the invention, heat from the concentrate of a not shown Steam generator are also discharged indirectly to a heat transfer medium in a container for feed water.

It is important in any form of use of concentrate as a source of heat and heat transfer or in the form of molecular water, H ₂ O for a configuration of processes of heat and mass transfer that the respective container 1 for feed water, which is shown here only as a housing, always a passage of distillate through pipes 2 and 3 , Thus, allows a flow of steam, in order to achieve the explained in the general description part advantages.

Further advantages of the inventive derivation of distillate or concentrate with distillate to a container for feed water resulting from the following description of 2 ,

In a perspective view of a housing 6 of the container 1 for feed water, according to 2 is a pipeline 2 , suitable for distillate and concentrate, an upwardly open hollow body 7 with a discharge of the concentrate from steam generators via an extension of the pipeline 2 presented in such a way that this concentrate and distillate in a filling 8th this hollow body 7 is directed. This is the end of the pipeline 2 through the filling 8th , from relaxed concentrate, covered.

In this case, it is envisaged that relaxed concentrate with distillate, according to 2 over the pipeline 2 is supplied. Next, this hollow body contains an overflow 9 for relaxed concentrate, which has a pipeline 4 at the height of the filling 8th for the derivation of the used concentrate according to 2 is formed.

Next are on the case 6 of the container 1 a pipe socket 10 for a supply of feed water, a raw pipe 11 for condensate and a pipe socket 12 for discharging the liquids to the task as feed water H ₂ O provided in a steam generator.

As shown in 2 escapes from the filling 8th a distillate of the concentrate, which as water vapor, H ₂ O from the upwardly open hollow body 7 exit. By this vapor according to the invention in the container 1 befindliches gaseous medium z. B. displaced air. It is further provided that these gaseous media via a pipe 3 be removed, for removal from this pipeline 3 to a consumer, not shown z. B. in laundries in a washing machine or in a dryer.

According to the representation according to the invention in 2 the hollow body protrudes 7 via a filling located in the container 5 out of feedwater. In these illustrated operating conditions in 2 would be a supply of water H ₂ O in the container 1 interrupted and in a next cycle should in safe operating conditions with a withdrawal of feed water through the nozzle 12 to be started. The advantage of this mode of operation is that when removing liquid volume from the container 1 an emerging space above the filling 5 filled by the distillate of the concentrate.

Advantage is, concentrate can be refilled and escapes through the pipeline 4 and released distillate of the concentrate can be used as steam. Another advantage is a high purity of the distillate and a reduction of the water contained in the effluent concentrate.

Another advantage is that only the hollow body 7 can be made of a higher grade material for concentrates of steam.

Next is in the pipeline 3 , according to 2 one to the container 1 belonging heat exchanger 13 and heaters of these gaseous media shown. This heat exchanger 13 can be heated with steam as a heat transfer medium. In one embodiment of the heat exchanger 13 For the removal of heat from liquid media, it is possible that concentrate under boiling conditions by indirect heat dissipation in this way via the container for feed water is derived. Example: Container for feed water Operating pressure in the steam condensate network 14 bar temperature 194 ° C Total efficiency 60% condensation heat 468 kcal per kg Residual heat in the condensate of the distillate 197 kcal / kg Return to the container 1 and Relaxation at 1 bar / 100 ° C: usable enthalpy difference 99 kcal per kg Share of waste heat (99/468 × 100) 21% 1. Derivation of the concentrate via the container 1: temperature 194 ° C residual heat 197 kcal / kg Cool down to approx. 98 ° C Heat release per kg of concentrate 99 kcal / kg Formation of distillate from concentrate (99/538) 0.184 kg of steam 2. Usable heat from concentrate: Residual heat per kg 197 kcal Residual concentrate after distillation 1 - 0.184 0.816 kg Heat content at 98 ° C (0.816x98) 80 kcal / kg of concentrate Net heat release (197 - 80) 117 kcal / kg concentrate 3. Energy saved per kg concentrate at a discharge of concentrate to the container 1, at 60% total efficiency of steam production: Gross savings (117 / 0.6) 195 kcal per kg

In the inventive derivation of the concentrate from steam generators on the container for feed water, starting from a water temperature of 10 ° C, the following efficiency of heat recovery is achieved: (based on 1 kg of concentrate) Efficiency: (195 / (197 - 10) × 100%) gives 104% efficiency

• • Einsparung an Wärme von 104% bezogen auf Konzentrat;
• • Einsparung an Wasser von 18,4% bezogen auf Konzentrat;
• • Nutzung der Einsparungen für die Entgasung von Speisewasser,
• • Integration von Stoffaustausch-Funktionen in einen Behälter;
• • Kompakte, Platz sparende Bauweise mit einem Behälter.

Beispiel Rohrleitung 2 Konzentrat, 14 bar 500 kg bei 14 bar Volumen von 500 kg 0,5 m3 Entspanntes Konzentrat ca. 0,4 m3 bei 1 bar/98°C Volumen des Destillats bei 100 kg 169 m3 bei 100°C The invention achieves the following advantages when using the waste product concentrate:

• • heat saving of 104% based on concentrate;
• • water saving of 18.4% based on concentrate;
• • use of the savings for the degassing of feed water,
• • integration of mass transfer functions into a container;
• • Compact, space-saving design with a container.

example pipeline 2 Concentrate, 14 bar 500 kg at 14 bar Volume of 500 kg 0.5 m3 Relaxed concentrate approx. 0.4 m3 at 1 bar / 98 ° C Volume of the distillate at 100 kg 169 m3 at 100 ° C

Advantage is that distillate and distillate with concentrate in piping 2 can be funded with the same cross-section.

Another Advantage is that concentrates and distillate from several steam generators over a container for feed water are derived can.

1

container for feed water

2

pipeline

3

pipeline for steam

4

pipeline for concentrate

5

Filling, feedwater

6

casing

7

hollow body

8th

Filling, concentrate

9

overflow

10

pipe socket

11

pipe socket

12

pipe socket

13

heat exchangers

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 19712993 A1 [0009]
• - DT 1551022 [0010]
• - DD 228865 A1 [0012]

Claims (13)

Containers for feed water from steam generators, eg. As in laundries, with a steam-condensate network, wherein a release of gases, eg. B. Oxygen O ₂ and carbon dioxide CO ₂ , and steam, H ₂ O from feed water or from a mixture of feed water and condensate, which through these containers ( 1 ), with pipelines ( 3 ) for the removal of steam, H ₂ O and gaseous media, characterized in that a pipeline ( 2 ) for the discharge of distillate from concentrate from steam generators into the container ( 1 ) is provided. Container according to claim 1, characterized in that the pipeline ( 2 ) is provided for connecting a heat source. Container according to one of the preceding claims, characterized in that the pipeline ( 2 ) is provided for receiving concentrate and distillate. Container according to one of the preceding claims, characterized in that the pipeline ( 2 ) in the container ( 1 ) as a supply line in an upwardly open hollow body ( 7 ) is provided. Container according to one of the preceding claims, characterized in that a pipeline ( 4 ) is provided for the discharge of concentrate. Container according to one of the preceding claims, characterized in that an overflow ( 9 ) from the hollow body ( 7 ) through a connection of the pipeline ( 4 ) is provided. Container according to one of the preceding claims, characterized in that a heat exchanger ( 13 ) is provided. Container according to one of the preceding claims, characterized in that the heat exchanger ( 13 ) is provided for a heating with concentrate. A method for degassing feed water from steam generators in a container according to claim 1, wherein a release of gases z. As oxygen O ₂ and carbon dioxide CO ₂ , and steam, H ₂ O from feed water or from a mixture of feed water and condensate, which over the container ( 1 ), with pipelines ( 3 ) for the removal of steam, H ₂ O and gaseous media, characterized in that by piping ( 2 ) for the discharge of distillate from concentrate from steam generators into the container ( 1 ), for the degassing of feed water, a steam-containing atmosphere is formed. A method according to claim 9, characterized in that the steam-containing atmosphere by a task of concentrate and distillate in one, in the container ( 1 ) and upwardly open hollow body ( 7 ) is formed. Method according to one of the preceding claims, characterized in that in a filling ( 8th ) concentrate over a pipeline ( 4 ) formed overflow ( 9 ) on the hollow body ( 7 ) is derived. Method according to one of the preceding claims, characterized in that gaseous media and vapors, H ₂ O via a pipeline ( 3 ) are derived for a removal. Method according to claim 9, characterized in that that it according to one of claims 1 to 8 or after a of claims 10 to 12 is formed.