EP2405195A2 - Spray cooler - Google Patents

Abstract

The radiator (10) has an injection cylinder (30) equipped with multiple injectors (32). A control element (50) is connected to a coolant supply with a terminal (52). Coolant feed conduits (70) are provided between the injection cylinder and the control element. Injection cylinder assigned ends (71) of coolant feed conduits are secured at a common flange plate (73), that is fixed at a receiving surface (36) of the injection cylinder. Assigned ends (72) of the control element are secured at another common flange plate (74) that is fixed at a receiving surface (56) of the control element.

Description

The invention relates to an injection cooler for cooling hot steam conducted in a pipeline according to the preamble of claim 1.

Installations using steam as a source of energy, such as plants belonging to power generation companies or combined heat and power plants, are usually calculated so that the steam used at the destination must have a certain temperature and pressure. However, the steam generated by the steam boiler is initially mostly overheated, so that it must be cooled to a lower temperature. For this purpose, so-called injection coolers are used, which are used directly in the steam line and inject a coolant, for example water, into the vapor stream. The injected water is atomized due to the differential pressure between the water and the steam in the steam line. It vaporizes and overheats while the steam cools itself.

Known injection coolers usually consist of a housing with an inlet for the cooling water and a projecting into the steam line injection cylinder, which carries a plurality of juxtaposed injection nozzles. In the case is a Control spindle out, which is mounted with one end in the injection cylinder connected to the housing and there carries a hole cone in the region of the injection nozzles. Depending on the temperature in the steam line, the spindle is driven. She performs a lifting movement. The stroke position corresponding to a controller signal releases a certain control cross-section in the hole cone for the entry of the cooling water in the cylinder. At the same time, standard bores are released to the nozzle chambers in the injection nozzles, whereby the water enters the vapor stream.

EP 0 682 762 B1 also uses a lifting system for controlling the amount of cooling water, namely a piston rod which is axially guided in a arranged between a water inlet opening and the injection nozzles hollow cylindrical cooling water pipe. The piston rod carries inside a nozzle head end a control piston, which releases the injectors position-dependent or locks.

Such injection coolers have the disadvantage that the control piston during its adjusting movement can release the nozzle orifices in turn only on the basis of their respectively struck linear arrangement, ie. the injectors can always be switched from top to bottom or from bottom to top in a fixed order, which unfavorably affects the water distribution within the steam line and thus unfavorable to the cooling of the superheated steam. Moreover, the seals and guide elements of the piston and the spindle are very heavily stressed due to the usually very high line pressure of 20 bar to over 300 bar, so that the life of the injection cooler is limited. Short maintenance intervals are the result; the operating costs are very high.

To achieve a longer service life of the seals and guide elements of the injection cooler, sees DE 85 33 682 U1 before that the control spindle or the piston rod executes no lifting movement, but a pivoting movement. As a result, on the one hand, the change of the control cross-sections of the injectors via a tangential movement. On the other hand, the injection nozzles arranged mostly in the longitudinal direction of the injection cylinder can be symmetrically opened and closed around a centrally arranged injection nozzle, which has a favorable effect on the distribution of the cooling water in the steam line. In addition, the swinging piston affects favorable to the size of the injection cooler, because the spindle or the piston rod does not have to drive out of the housing.

The problem here, however, is that all moving parts of the injection cooler are still in the injection cylinder, which is exposed to extreme loads within the steam line, especially if the steam temperatures in newer systems are above 600 ° C and the cooling water pressure is above 300 bar. The wear of the injection cooler is therefore very high and there are time consuming maintenance and repair work.

To counter that, beats NL 93 01 125 A1 in that the injection nozzles of the injection cylinder are located within the steam line, while the control element is arranged with its valve arrangement at a distance thereof outside the steam line. Thus, the control element and the injectors are spatially separated and the control element is no longer exposed to the extreme conditions within the steam line.

For supplying the injectors with cooling water is in NL 93 01 125 A1 a separate water pipe is provided for each nozzle, which is arranged between the control element and the injection cylinder. Within the injection cylinder channels are formed, which leads the cooling water from an associated water pipe to the respectively associated injection nozzle. Within the control element, a piston rod is provided, which carries a control piston in a cylindrical chamber. Depending on the stroke position, this releases the individual water pipes leading to the injection nozzles.

Thus, although there is no moving element in the injection cylinder within the steam line. The disadvantage here, however, that all cooling water lines must be connected individually to the control element and the injection cylinder, which is correspondingly complex and expensive. Furthermore, the injection cylinder is firmly welded to the steam line, whereby the installation and removal of the injection cylinder is always associated with considerable effort. This is particularly disadvantageous when the injectors or even the entire injection cylinder must be replaced or when another defect has occurred on the injection cylinder. A further problem is that the water pipes and thus also the injectors are released in succession only in a predetermined order due to the lifting movement of the piston can result in uneven distribution of cooling water within the steam line. Moreover, the reciprocating piston must always work against the vapor pressure prevailing in the steam line, so that a relief bore is necessary in the connection head of the control element. If all supply lines are closed, there is therefore the danger that, due to the high water pressure, water will always drip from the injection nozzles into the steam line, which has an unfavorable effect on exact regulation of the steam temperature.

The injection cylinder must also have a relatively large diameter in order to accommodate the individual supply lines for the injection nozzles can. With a large number of injection nozzles, therefore, the injection cylinder must have a relatively large diameter.

The aim of the invention is to avoid these and other disadvantages of the prior art and to provide an improved injection cooler, which is inexpensive by simple means and easy to handle. The aim is in particular a simple and rapid installation and removal. Furthermore, the injection cooler should have a long service life and ensure optimum cooling water distribution.

Main features of the invention are specified in the characterizing part of claim 1. Embodiments are the subject of claims 2 to 24.

In an injection cooler for cooling superheated steam conducted in a pipeline, with an injection cylinder arranged at least in sections in the pipeline, which is provided with a plurality of injection nozzles, with a control element which can be connected to a connection to a coolant supply, wherein a valve arrangement is provided in the control element is with which the coolant supply to the injection nozzles in the injection cylinder is controllable, and with coolant supply lines, which are provided between the injection cylinder and the control element, wherein a separate coolant supply line is provided for each injector, the invention provides that the injection cylinder associated ends of the Kühlmittelzuführleitungen are attached to a common first flange plate which is fixable to a receiving surface on the injection cylinder, and that the control member associated ends of the Kühlmittelzuführleitungen to a common second Flange plate are fixed, which is fixable to a receiving surface of the control element.

The coolant supply lines provided between the injection cylinder and the control element initially ensure that the control element can be arranged at a distance from the injection cylinder and thus outside the steam line. The Flanschplatten the Kühlmittelzuführleitungen allow a simple and quick installation of the injection cooler, because each attached to a flange plate ends of the Kühlmittelzuführleitungen are always connected in a single assembly step together on the injection cooler or on the control element. In contrast to the previously known solutions, the lines no longer have to be individually screwed and sealed to the injection cylinder or the control element. This is done in groups, which not only significantly reduces the workload. The risk of leaks and assembly errors is significantly reduced.

Another advantage of the injection cooler according to the invention is that the injection cylinder can be quickly and easily replaced if necessary, which must be done regularly when very high temperatures and very high pressures prevail within the steam line. By simply removing a flange plate several cooling water supply lines are removed at once, which has a favorable effect on the installation and maintenance costs. Furthermore, it is possible to construct the injection cooler in a modular manner and to design both the injection cylinder and the control element as well as the coolant supply lines combined on both sides via the flange plates as preassembled structural units. Accordingly, the invention provides that the coolant supply lines and the flange plates form an assembly.

The injection cylinder has a housing, wherein the receiving surface for the first flange plate is formed on an outer surface of the housing. The flange plates and the coolant supply lines attached thereto are thus mounted on the injection cylinder from the outside. It is further favorable if the housing of the injection cylinder in the area of the receiving surface for the first flange plate in cross-section angular, for example, square, rectangular or polygonal, is formed. The flange plates can therefore rest flat on the housing of the injection cylinder and reliably sealed against the receiving surface and fixed.

An important embodiment of the invention provides that a core insert is provided in the housing, wherein in the core insert for each injector a separate Feed channel is formed, which is fluidly connected to the respective associated injection nozzle. Thus, no pipes must be arranged within the housing for the injection cylinder, which has a very favorable effect on the size of the injection cylinder. This can rather be made extremely slim, so that the flow cross-section is reduced only insignificantly within the vapor line of the housing of the injection cylinder.

It is advantageous if the feed channels introduced in the core insert holes and / or introduced into the outer circumference of the core insert grooves. These can be evenly distributed over the cross section and the circumference of the core insert, so that a relatively large number of channels can be accommodated in the injection cylinder. Because each feed channel can be assigned its own injection nozzle, a corresponding number of injectors can be arranged within the pipeline. The cooling effect of the injection cooler is correspondingly high, at the same time the outer dimensions are relatively low, so that the free cross-section of the steam line is only slightly reduced and the pressure drop within the line is relatively low.

In order to ensure the connection of the coolant supply lines to the injection nozzles, each supply channel in the core insert is flow-connected to an associated coolant supply line via an associated opening in the housing and via a recess associated with the respective opening. As a result, with the placement and fixing of the flange plate on the housing of the injection cylinder automatically each Kühlmittelzuführleitung assigned their respective injector correctly. Assembly errors are therefore excluded.

For the production, it is favorable if the core insert is divided in the longitudinal direction of the injection cylinder. As a result, the individual sections can be made separately and also be mounted separately in the housing, the core insert is non-positively and / or positively inserted into the housing. For example, the core insert is pressed into the housing or the housing is shrunk onto the core. In any case, no cohesive connections between the housing and the core longer necessary or available, which can be loaded or damaged within the steam line. The service life of the injection cylinder is thereby significantly increased. Furthermore, the maintenance cycles can be significantly extended, which further has a favorable effect on the operating costs.

In order to increase the number of injectors to be supplied with coolant at the injection cylinder, the injection cylinder is provided with at least two receiving surfaces for receiving first flange plates. However, it is also possible to provide three or more receiving surfaces, wherein the housing with three or four receiving surfaces in cross-section is preferably square, while with five or more receiving surfaces a five or hexagonal housing cross-section is used. In any case, flange plates with coolant supply lines can be mounted on almost all side surfaces of the injection cylinder. Each flange plate combines several coolant supply lines into groups, which in turn are provided as preassembled units.

Another important embodiment of the invention provides that the injection cylinder can be fixed by means of a flange on the pipe. This also reduces the assembly effort, because complex welds are no longer necessary. The flange connection is, for example, a conventional flange connection, a self-sealing flange closure according to Uhde-Bredtschneider or a detachable connection of rotationally symmetrical components according to the European patents EP 0 775 863 B1 and or EP 1 010 931 B1 by Mr Alfred Schlemmenat, the contents of which are hereby incorporated by reference.

The control element has a housing, wherein the receiving surface for the second flange plate is formed on an outer surface of the housing. This makes it possible to attach the coolant supply lines not only quickly and reliably to the injection cylinder, but also to the control element. Whose housing is this formed in the area of the receiving surface for the second flange plate preferably in cross-section angular, for example, square, rectangular or polygonal, so that the flange plates can be placed flat and always find optimal support.

The valve arrangement for the injection cooler is formed in the housing of the control element and thus outside the steam pipe. It comprises a control cylinder, which is arranged in the region of the receiving surface in the housing, wherein the control cylinder is movable by means of a control spindle, which protrudes from the end of the housing of the control element. On the control spindle can thus attack a drive, such as a motor, a gear or a lever.

According to an important embodiment of the invention, the control cylinder is provided with a longitudinal recess and radial control openings, which are flow-connected to the connection for the coolant supply, wherein a control opening is provided for each injection nozzle in the injection cylinder and its associated coolant supply. This makes it possible to supply the injectors in the injection cylinder individually via the coolant lines with coolant, which has a favorable effect on the reliability, because should a Kühlmittelzuführleitung fail, the remaining supply lines remain unaffected. Furthermore, it is possible to regulate each injector in a targeted manner in order to achieve an optimum cooling effect within the steam line.

The invention further provides that each control opening in the control cylinder via an associated opening in the housing of the control element and via a respective opening associated recess in the second flange plate is fluidly connected to the respective injection nozzle associated Kühlmittelzuführleitung. Thus, even during assembly of the flange plates, an automatic assignment of the coolant supply lines to the control openings, i. there can be no assembly errors.

Advantageously, the control cylinder is rotatably mounted about a longitudinal axis of the housing, wherein the opening cross section of each opening in the housing of the control element is variable by a rotational movement of the control cylinder. Thus, no lifting movement takes place within the housing of the control element, which allows an extremely compact design of the control element. Rather, the rotational movement ensures that the size of the cross sections of the openings in the housing of the control element are changed by a purely tangential movement. As a result, the life of the seals and guide elements within the control element is significantly increased. In addition, the space required for the adjusting movement of the control cylinder is very small, which further has a favorable effect on the size of the control element. Another advantage of the rotational movement is that the control openings can open and close the respectively associated openings in the housing of the control element and thus the individual Kühlwasserzuführleitungen almost individually, so that within the steam pipe extremely uniform cooling water distribution can be achieved.

If necessary, the control openings may be slit-shaped at least in sections. These control slots are offset on the circumference of the control cylinder to each other and at different heights, so that the openings for the Kühlwasserzuführleitungen are selectively opened and closed successively and symmetrically to each other.

In order to connect to the control element several groups of cooling water supply lines, at least two receiving surfaces for receiving second flange plates are provided on the housing. However, it is also possible here to provide three or more receiving surfaces, wherein the housing with three or four receiving surfaces in cross-section is preferably square, while with five or more receiving surfaces a five or hexagonal housing cross-section is used. In any case, can be mounted on almost all side surfaces of the injection cylinder in or more flange plates with coolant supply. In this case, each flange plate combines several coolant supply lines into a group, which in turn are made available as preassembled units.

Forming the first and the second flange plate of the cooling water supply lines identically, the handling and assembly of the system is further simplified because the flange plates can be mounted on both the injection cylinder and the control element.

In a further embodiment of the invention, the valve arrangement has a ball valve which is arranged between the control cylinder and the connection for the coolant supply. Furthermore, it may be expedient if a throttle device is arranged between the control cylinder and the connection for the coolant supply.

Fig. 1

eine Frontansicht eines erfindungsgemäßen Einspritzkühlers, mit einem Einspritzzylinder, einem Regelorgan und einer dazwischen ausgebildeten Flanschbaugruppe mit Kühlmittelzuführleitungen;

Fig. 2

eine Seitenansicht des Einspritzkühlers von Fig. 1;

Fig. 3

die zwischen dem Einspritzzylinder und dem Regelorgan vorgesehene Kühlmittelzuführleitungen als Flanschbaugruppe;

Fig. 4

eine Seitenansicht des Einspritzzylinders;

Fig. 5

eine Schnittansicht des Einspritzzylinders von Fig. 4;

Fig. 6

eine Draufsicht auf einen Kerneinsatz des Einspritzzylinders von Fig. 4;

Fig. 7

eine Seitenansicht des Kerneinsatzes von Fig. 6;

Fig. 8

eine Schnittansicht des Kernseinsatzes von Fig. 6;

Fig. 9

eine Seitenansicht des Regelorgans; und

Fig. 10

eine Schnittansicht des Regelorgans von Fig. 8.

Further features, details and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. Show it:

Fig. 1

a front view of an injection cooler according to the invention, with an injection cylinder, a control member and an interposed flange assembly with coolant supply lines;

Fig. 2

a side view of the injection cooler of Fig. 1 ;

Fig. 3

the Kühlmittelzuführleitungen provided between the injection cylinder and the control element as a flange assembly;

Fig. 4

a side view of the injection cylinder;

Fig. 5

a sectional view of the injection cylinder of Fig. 4 ;

Fig. 6

a plan view of a core insert of the injection cylinder of Fig. 4 ;

Fig. 7

a side view of the core insert of Fig. 6 ;

Fig. 8

a sectional view of the core insert of Fig. 6 ;

Fig. 9

a side view of the control element; and

Fig. 10

a sectional view of the control element of Fig. 8 ,

The in the Fig. 1 and 2 generally designated 10 injection cooler is designed for use in a (not shown) power plant. It is to super hot steam, which is guided in a pipeline 20 of the power plant, to a predetermined temperature by a liquid coolant, such as water, is injected into the pipe 20 and in the vapor stream.

For this purpose, the injection cooler 10 has an injection cylinder 30, which is connected by means of a flange connection 34 to the steam pipe 20 and at least partially protrudes into it. Within the conduit 20, the injection cylinder has a plurality of injectors 32 which spray the coolant within the conduit 20. A control element 50, which is connected with a flange connection 52 to a coolant supply (not shown), regulates via a valve and throttle arrangement 60, 80, 90 the amount and pressure of the coolant to be injected into the pipeline 20 or into the vapor stream.

Between the injection cylinder 30 and the control element 50 coolant supply lines 70 are provided, which are combined to form assemblies B, wherein a separate coolant supply line 70 is provided for each injector 32. In the Fig. 1 For clarity, only one assembly B is shown with a total of five coolant supply lines 70, while in the Fig. 2 two such assemblies are shown. Depending on the number of injectors 32, more than two such assemblies B can be provided by coolant supply lines 70, for example, three, four or five, all of which are connected to the injection cylinder 30 and the control element 50. Each group B may also include more than five or fewer coolant supply lines 70 as needed and depending on the space available.

It is important that each assembly B comprises a number of coolant supply lines 70, wherein the injection cylinder 30 associated ends 71 of the Kühlmittelzuführleitungen 70 are attached to a common first flange 73 and the control member 50 associated ends 72 of the coolant supply lines 70 to a common second flange 74 , The first flange plate 73 is fixed to the injection cylinder 30, which is provided for this purpose with one or more planar receiving surfaces 36, while the second flange plate 74 is connected to the control element 50, which is also provided with one or more flat receiving surfaces 56. In each flange 73, 74 holes are introduced on the edge side holes 77 for receiving screws, so that the flange plates 73, 74 with the injection cylinder 30 and the control member 50 can be screwed tight.

In the flange plates 73, 74 further recesses 75, 76 are provided, which are respectively connected in pairs with an associated coolant supply line 70, so that the coolant can flow freely through the flange plates 73, 74 and the coolant supply lines 70 therethrough. The recesses 75, 76 are -as in Fig. 3 shown - arranged linearly in a row, wherein the coolant supply lines 70 are preferably parallel and at a constant distance from each other. This ensures a simple geometry of both the injection cylinder and the control element, which can be made narrow overall transverse to their longitudinal axes A, L. If desired, the recesses 75, 76 and the coolant supply lines 70 can also be provided in another arrangement, for example offset or obliquely next to one another or in the form of a matrix.

Each coolant supply line 70 is pressure-tight screwed or welded to the respective associated flange plate 73, 74, so that the flange assembly B forms a stable unit that is economically prefabricated and easy to handle. The coolant supply lines 70 may be designed to be rigid and / or at least partially flexible, the shape and the course of the lines 70 being adapted or adaptable to the respective installation situation.

In order to seal the flange plates 73, 74 with respect to the receiving surfaces 36, 56, concentric with the recesses 75, 76 (not shown) seals are provided, which are partially recessed in the flange plates 73, 74. For this purpose, either the recesses 75, 76 are used, which, for example, have a stepwise design on the edge are, or you put the seals in separate (not shown) grooves that are separately introduced into the bearing surfaces 78 of the flange 73, 74. Additionally or alternatively, a single ring seal can be used, which encloses the recesses 75, 76 in the support surface 78 gapless.

In order to further simplify the assembly of the assemblies B, the first and the second flange plate 73, 74 are formed identically. This makes it possible to attach the flange plates 73, 74 either to the injection cylinder 30 or to the control element 50. In this way, assembly errors are effectively avoided.

It can be seen that the formation of the coolant supply lines 70 as flange assemblies B makes it possible to arrange the control element 50 at a distance from the injection cylinder 30 and thus outside the steam line 20, which is often over 600 ° C. in modern power plants. As a result, there are no moving parts within the extremely hot line region, which has an extremely favorable effect on the life of the injection cylinder 30 and the control element 50. Furthermore, the assembly cost of the cooling water supply lines 70 is reduced to a minimum, because they can be mounted as assemblies B quickly and conveniently on the injection cylinder 30 and the control element 50. In addition, the replacement of individual components of the injection cooler 10 is quickly and conveniently possible, because by the simple assembly and disassembly of the flange 73, 74 and the injection cylinder 30 and the control element 50 can be quickly and economically replaced or removed for repair and removed.

The injection cylinder 30 has - like Fig. 4 2 shows a housing 31 which is cylindrical in a first section 311 facing the pipeline 20, while a second section 312 facing the flange assembly B is square in cross-section, the outer surface 33 of the housing 31 being in the region of the second section 312 four flat side surfaces 36 forms. These serve as receiving surfaces for the first flange 73 of the flange assembly B. It can be seen in Fig. 1 in that the size of the receiving surfaces 36 and the size of the flange plates 73 are coordinated with one another in such a way that the latter, with their contact surfaces 78, rest flat on the receiving surfaces 36 in their entirety. For fixing the flange plates 73, threaded holes 38 are made in the receiving surfaces 36 at the edge, which coincide are arranged with the holes 77 in the flange 73, so that the latter can be firmly screwed to the housing 31 of the injection cylinder 30.

As Fig. 4 further shows 31 openings 37 are provided in the receiving surfaces 36 of the housing, through which the coolant can flow into the injection cylinder 30. The number and arrangement of the openings 37 in a receiving surface 36 corresponds to the number and arrangement of the recesses 75 in the respectively associated flange plate 73 and thus the number of Kühlmittelzuführleitungen 70, which are provided on the flange 73. If this lies in its intended condition with its support surface 78 on the associated receiving surface 36 of the housing 31, then the openings 37 and the recesses 75 in the flange 73 are congruent one above the other, so that the coolant can freely flow from each coolant supply line 70 into the injection cylinder 30 , In each case the same number of openings 37 or recesses 75 can be provided in the receiving surfaces 36 and the flange plates 73. But man can also - as in Fig. 4 shown - provide a different number of openings 37 and recesses 75 in the different areas. In the latter case, for example, a first flange assembly has a total of five coolant supply lines 70, while an adjacent flange assembly has a total of four coolant supply lines 70.

The openings 37 open inside the housing 31 in a substantially cylindrical cavity 39, in which a core insert 40 is inserted. In the core insert 40, a separate feed channel 44 is formed for each injection nozzle 32 of the injection cylinder 30, which is flow-connected in the lower portion 311 of the housing 31 via an end portion 481 with the respective associated injector 32 and in the upper portion 312 of the housing 31 via an end portion 482 is in flow communication with an associated opening 37.

Thereby, each coolant supply pipe 70 which is connected to a flange plate 73 and which is mounted by means of this flange plate 73 on the housing 31 of the injection cylinder 30, an injection nozzle 32 fixedly assigned. These are individually and individually supplied via the channels 44 in the core insert 40 with coolant, assembly errors due to the unique associations are not possible.

The Fig. 6 to 8 This consists essentially of a cylindrical body 41 which is non-positively and / or positively inserted into the housing 31, for example by pressing the core insert 40 into the housing 31 or by shrinking the housing 31 on the Core insert 40. In this case, the body 41 in particular closes off pressure-tight towards the wall of the cavity 39, so that the channels 44 formed in the core insert 40 are separated from one another without leakage. Lid 49 inserted into the cavity 39 at the end closes the housing 31 tightly, so that no coolant can escape from the housing 31 and thus out of the injection cylinder 30 at the end.

The feed channels 44 in the core insert 40 are - as in particular Fig. 8 shows - introduced holes 45 and / or in the outer periphery 46 of the core insert 40 milled grooves 47, which extend all in the longitudinal direction L of the injection cylinder 30 and in their respective end regions - if necessary - on (not shown) radial transverse bores or transverse grooves in the respective associated end portions 481, 482 open. These are on the one hand with the associated injectors 32 and on the other hand with the associated openings 37 in the housing 31 in fluid communication.

It can be seen that the channels 44 are formed distributed over the cross-sectional area of the core insert 40, so that a relatively large number of channels 44 can be accommodated in the core insert 40. At the same time there is an overall compact arrangement, i. the core insert 40 or its cylindrical body 41 has, despite the large number of channels 44, only a small diameter, which has an extremely favorable effect on the diameter of the housing 31. As a result, the injection cylinder 30 is formed relatively narrow, so that the flow cross-section in the pipeline 20 is only slightly reduced. At the same time, however, each injection nozzle 32 is connected in the injection cylinder with a separate coolant supply line 70, so that the nozzles 32 can be individually controlled via the control element 50 and supplied individually with coolant.

The core insert 40 is preferably integrally formed over the entire length of the injection cylinder 30. However, it can also be formed longitudinally L of the injection cylinder 30 one or more times to simplify the introduction of the holes 45 and grooves 47.

The injection cylinder 30 has - depending on the number of injectors 32 - at least one, but preferably at least two to four receiving surfaces 36 for the first flange 73 of the flange assembly B. But you can also form the upper portion 312 of the housing 31 five- or hexagonal in this way, five or more flange assemblies B to connect to the injection cylinder 30 can.

To fix the injection cylinder 30 to the pipe 20, a flange 34 is provided with a receptacle 351 which is attached via a pipe extension 352 to the pipe 20. As Fig. 5 shows, the injection cylinder 30 is inserted with its housing 31 from above into the receptacle 351, wherein the housing 31 has a Flanschkragen 313, which is supported within the receptacle 351 on a step 353. Between the flange collar 313 and the step 353, a seal 355 is arranged. The pressure-tight fixing of the housing 31 in the receptacle 351 takes place by means of screws 354 and clamping bodies 356, which press the flange collar 313 via the seal 355 against the receptacle 351. Such a flange connection 34 corresponds to the detachable connection of rotationally symmetrical components according to the European patents EP 0 775 863 B1 and or EP 1 010 931 B1 by Mr Alfred Schlemmenat, the contents of which are hereby incorporated by reference.

However, the flange connection 34 can also be a conventional flange connection or a self-sealing flange closure according to Uhde-Bredtschneider.

The control element 50 has - like Fig. 9 1 shows a housing 51 which is substantially cylindrical in a first section 511 facing the coolant connection 52, while a second section 512 facing the flange assembly B is square in cross-section, the outer surface 53 of the housing 51 being in the region of the second Section 512 four flat side surfaces 56 forms. These serve as receiving surfaces for the second flange 74 of the flange assembly B. The size of the receiving surfaces 56 and the size of the flange 74 are matched to one another such that the latter rest with their bearing surfaces 78 flat and full surface on the receiving surfaces 56. For fixing the flange plates 74, threaded bores 58 are introduced into the receiving surfaces 56 at the edge, which are arranged congruently with the bores 77 in the flange plates 74, so that the latter can be firmly screwed to the housing 51 of the control element 50.

As Fig. 9 further shows 51 openings 57 are introduced through which the coolant from the control member 50 can flow in the receiving surfaces 56 of the housing. The number and arrangement of the openings 57 in a receiving surfaces 56 corresponds to the number and arrangement of the recesses 76 in the respective associated flange plate 74 and thus the number of Kühlmittelzuführleitungen 70, which are provided on the flange plate 74. If this lies in its intended condition with its support surface 78 on the associated receiving surface 56 of the housing 51, then the openings 57 and the recesses 76 in the flange 74 are congruent one above the other, so that the coolant can flow freely from the control element 50 into the coolant supply lines 70 , In each case the same number of openings 57 or recesses 76 can be provided in the receiving surfaces 56 and the flange plates 74. But man can also - as in the injection cylinder 30 - provide a different number of openings 57 and recesses 76 in the different areas.

The openings 57 open inside the housing 51 in a substantially cylindrical cavity 59, in which a valve arrangement 60 is formed. In the region of the receiving surfaces 56 for the flange plates 74, this comprises a control cylinder 62, which is rotatably mounted about the longitudinal axis A of the control element 50 by means of a control spindle 67. The control spindle 67 is mounted in a (unspecified) bearing sleeve with stuffing box. It protrudes with one end 68 end protrudes from the housing 51 of the control element 50 and is there connected to an actuator (not shown), which can operate mechanically, hydraulically, pneumatically or electrically.

The control cylinder 62 has a central longitudinal recess 63 which is fluidly connected within the housing 51 to the connection 52 for the coolant supply and which is circumferentially provided with radial control ports 64, wherein for each opening 57 and for each injector 32 in the injection cylinder 30 and thus for each associated Kühlmittelzuführleitung 70 a control port 64 is provided.

If one sets the control cylinder 62 via the control spindle 67 in a certain angular position relative to the housing 51, then selected control openings 64 in the control cylinder 62 via the respectively associated openings 57 in the housing 51 of the control element 50 and the openings 57 associated with the recesses 76 in the second flange 74 of the flange assembly B fluidly connected to the respective associated Kühlmittelzuführleitungen 70 so that the cooling water can flow out of the control member 50 out through the opened Kühlmittelzuführleitungen 70 in the core insert 40 in the injection cylinder 30 associated channels 44 to from there through the respective associated injectors 32 can flow into the pipe 20 therethrough. The opening cross-section of each opening 57 in the housing 50 of the control member 50 is here by the rotational movement of the control cylinder 62 about the axis A variable, so that the respectively associated coolant supply line 70 released and the coolant flow can be controlled. Preferably, the control openings 64 are at least partially slit-shaped. However, they can also be round or oval.

The control element 50 has - depending on the number of injection nozzles 32 - at least one, but preferably at least two to four receiving surfaces 56 for the second flange 74 of the flange assembly B. But you can also form the second portion 512 of the housing 51 five- or hexagonal to in this way, five or more flange assemblies B to connect to the control element 50 can.

In addition to the control cylinder 62, the valve arrangement 60 has a ball valve 80 in the region of the first housing section 511. With this, the coolant flow from the port 52 into the housing 51 can be additionally completely shut off if necessary. The ball valve 80 is preferably arranged between the control cylinder 62 and the connection 52 for the coolant supply. Here, moreover, a throttle device 90 may be provided, which regulates the pressure of the flowing from the port 52 in the control element 50 coolant, for example, to be able to control higher differential pressures.

With the injection cooler 10 according to the invention, differential pressures between cooling water and superheated steam can be controlled with the finest atomization of the cooling water, an immediate and complete mixing of the cooling medium with the vapor stream taking place. Depending on the temperature of the hot steam flowing in the pipeline 20, the control spindle 67 is pivoted within the housing 51 via the drive, not shown, so that a tangential movement of the control openings 64 takes place. According to this movement, different control cross sections of the control openings 64 with respect to the openings 57 in the housing 51 and the recesses 76 in the second flange 74 of the assemblies B released, whereby the cooling water can flow into the respective open Kühlmittelzuführleitungen 70 and the first flange 73 into the injection cylinder 30.

The invention is not limited to one of the above-described embodiments, but can be modified in many ways. It is recognized that in an injection cooler 10 for cooling superheated steam in a pipeline 20, with an at least partially arranged in the pipeline 20 injection cylinder 30 which is provided with a plurality of injectors 32, with a control member 50, which with a connection 52 to a Coolant supply is connectable, wherein in the control member 50, a valve assembly 60 is provided with which the coolant supply to the injectors 32 in the injection cylinder 30 is controllable, and with coolant supply lines 70 which are provided between the injection cylinder 30 and the control member 50, wherein for each injector 32, a separate coolant supply line 70 is provided, it is provided that the injection cylinder 30 associated ends 71 of the Kühlmittelzuführleitungen 70 are fixed to a common first flange 73 which is fixable to a receiving surface 36 on the injection cylinder 30, and that the control member 50th associated ends 72 of the Kühlmittelzuführleitungen 70 are fixed to a common second flange plate 74 which is fixable to a receiving surface 56 of the control member 50, the Kühlmittelzuführleitungen 70 and the flange 73, 74 form an assembly B, which between the injection cooler 30 and the control element 50th can be mounted. The injection cylinder 30 has a housing 31, in which a core insert 40 is provided, wherein in the core insert 40 for each injection nozzle 32, a separate feed channel 44 is formed, which is fluidly connected to the respective associated injector 32.

All of the claims, the description and the drawings resulting features and advantages, including design details, spatial arrangements and method steps may be essential to the invention both in itself and in various combinations.

LIST OF REFERENCE NUMBERS

A

Longitudinal axis (control element)

B

module

L

Longitudinal direction / longitudinal axis (injection cylinder)

S

screw

10

Desuperheaters

20

pipeline

30

Injection cylinder

31

casing

311 1

first section

312

second part

313

flange collar

32

injectors

33

outer surface

34

flange

351

admission

352

pipe extension

353

step

354

screw

355

poetry

356

clamping bodies

36

receiving surface

37

opening

38

threaded holes

39

cavity

40

core insert

41

cylindrical body

44

feed

45

drilling

46

outer periphery

47

groove

481

end

482

end

49

cover

50

regulating element

51

casing

511

first section

512

second part

52

connection

53

outer surface

56

receiving surface

57

opening

58

threaded holes

60

valve assembly

62

usually cylinders

63

longitudinal recess

64

control port

67

regulating spindle

68

The End

70

coolant supply line

71

The End

72

The End

73

first flange plate

74

second flange plate

75

recess

76

recess

77

drilling

78

support surfaces

80

ball valve

90

throttling device

Claims (15)

Injection cooler (10) for cooling hot steam conducted in a pipeline (20), a) with an at least partially in the pipeline (20) arranged injection cylinder (30) which is provided with a plurality of injection nozzles (32), b) with a control element (50) which can be connected to a connection (52) to a coolant supply, c) wherein in the control member (50) a valve assembly (60) is provided, with which the coolant supply to the injection nozzles (32) in the injection cylinder (30) is adjustable, and d) with coolant supply lines (70), which are provided between the injection cylinder (30) and the control member (50), e) wherein for each injection nozzle (32) a separate coolant supply line (70)
is provided,
characterized, f) that the injection cylinder (30) associated ends (71) of the Kühlmittelzuführleitungen (70) on a common first flange plate (73) are fixed to a receiving surface (36) on the injection cylinder (30), and g) that the control member (50) associated ends (72) of the Kühlmittelzuführleitungen (70) on a common second flange plate (74) are fixed to a receiving surface (56) of the control member (50). An injection cooler according to claim 1, characterized in that the coolant supply lines (70) and the flange plates (73, 74) form an assembly (B). An injection cooler according to claim 1 or 2, characterized in that the injection cylinder (30) has a housing (31), wherein the receiving surface (36) for the first flange plate (73) on an outer surface (33) of the housing (31) is formed. An injection cooler according to claim 3, characterized in that the housing (31) of the injection cylinder (30) in the region of the receiving surface (36) for the first flange plate (73) is formed angularly in cross section. An injection cooler according to claim 3 or 4, characterized in that in the housing (31) a core insert (40) is provided, wherein in the core insert (40) for each injection nozzle (32) has a separate feed channel (44) is formed with the respectively associated injection nozzle (32) is fluidly connected. An injection cooler according to claim 5, characterized in that the feed channels (44) in the core insert (40) introduced holes (45) and / or in the outer periphery (46) of the core insert (40) introduced grooves (47). An injection cooler according to claim 5 or 6, characterized in that each feed channel (44) in the core insert (40) via an associated opening (37) in the housing (31) and via one of the respective opening (37) associated with recess (75) in the first Flange plate (73) with an associated coolant supply line (70) is fluidly connected. Injection cooler according to one of claims 5 to 7, characterized in that the core insert (40) non-positively and / or positively inserted into the housing (31). Injection cooler according to one of claims 5 to 8, characterized in that the core insert (40) in the longitudinal direction (L) of the injection cylinder (30) is divided. Injection cooler according to one of claims 1 to 9, characterized in that the injection cylinder (30) by means of a flange (34) on the pipe (20) can be fixed. Injection cooler according to one of claims 1 to 10, characterized in that the control element (50) has a housing (51), wherein the receiving surface (56) for the second flange plate (74) formed on an outer surface (53) of the housing (51) is. An injection cooler according to claim 11, characterized in that the housing (51) of the control member (51) in the region of the receiving surface (56) for the second flange plate (74) is formed angularly in cross section. An injection cooler according to claim 11 or 12, characterized in that the valve arrangement (60) has a control cylinder (62) which is arranged in the region of the receiving surface (56) in the housing (51), wherein the control cylinder (62) with a longitudinal recess (63 ) and radial control ports (64) fluidly connected to the coolant supply port (52), wherein a control port (64) is provided for each injector (32) in the injection cylinder (30) and its associated coolant supply line (70). An injection cooler according to claim 13, characterized in that each control opening (64) in the control cylinder (62) via an associated opening (57) in the housing (51) of the control element (50) and via a respective opening (57) associated with recess (76) in the second flange plate (74) with the respective injection nozzle (32) associated Kühlmittelzuführleitung (70) is fluidly connected. An injection cooler according to claim 13 or 14, characterized in that the control cylinder (62) about a longitudinal axis (A) of the housing (51) is rotatably mounted, wherein the opening cross-section of each opening (57) in the housing (50) of the control member (50) a rotational movement of the control cylinder (62) is variable.

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