Method for steam generation and steam generation device
By separating the condensate in the water treatment unit and compressing the vapor phase using a compressor, the problem of low efficiency in existing steam generation devices is solved, achieving more efficient steam generation and utilization.
Patent Information
- Application Number
- CN202480018903.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-03-14
- Filing Date
- 2024-03-07
- Publication Date
- 2025-10-31
AI Technical Summary
Existing steam generation devices have low efficiency and thermal efficiency when using condensate to generate steam, especially in the process of feedwater treatment where heat is not fully utilized.
By separating the condensate into a vapor phase and a liquid phase in the feedwater treatment unit, the liquid phase is returned to the steam generator for re-evaporation, and the vapor phase is compressed by the compressor to form process steam, which is then combined with the process steam generated by the steam generator for use, thereby optimizing heat utilization.
It improves the overall efficiency and thermal efficiency of the steam generation process, reduces energy loss, and achieves more efficient steam utilization.
Smart Images
Figure CN120883006A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a method for generating steam using condensate returned in the form of feedwater. Furthermore, this invention also relates to a steam generation apparatus for generating steam using condensate returned in the form of feedwater, preferably using the above-described method, comprising a steam generator for generating process steam, an output device for supplying condensate to an energy-consuming device for forming condensate through the condensation of process steam, a return device for supplying condensate, and a feedwater treatment device for treating the condensate while simultaneously forming feedwater. Background Technology
[0002] Steam generating units are typically used to produce process steam, which can drive steam turbines or be used to heat industrial processes. These industrial processes can be chemical processes or other manufacturing processes in which heat is required at certain locations or to perform specific method steps. For example, this could be a drying process or a similar process.
[0003] Typically, a steam generating unit comprises one or more steam generators in the form of so-called steam boilers, heated by the combustion of fossil fuels or renewable fuels. The resulting high-temperature flue gas is used to evaporate feedwater supplied to the steam boiler. The feedwater is typically piped to the industrial steam boiler under overpressure, enabling a continuous and efficient supply of essentially constant-pressure, constant-temperature process steam to connected energy-consuming units. The energy-consuming units can be of various designs, as described above. However, regardless of the specific structure of the energy-consuming unit, the process steam condenses within it by releasing heat. The condensate is typically returned via a reflux device and introduced into the feedwater treatment unit of the steam generating unit, where it is degassed. The resulting feedwater is then evaporated again in the steam boiler and reintroduced as process steam to the energy-consuming units.
[0004] To utilize the energy of the flue gas in the steam generator as efficiently as possible and transfer it to the feedwater, it is desirable to supply the feedwater to the steam generator at the lowest possible temperature. Otherwise, the flue gas would leave the steam generator at a still relatively high temperature, carrying a significant amount of unused heat. However, during thermodynamic degassing in the feedwater treatment unit, the feedwater temperature can reach slightly above 100°C. To reduce the feedwater temperature after degassing, an economizer, which is formed as a heat exchanger, is known, in which the feedwater can be cooled by, for example, fresh water, which can then be supplied to the feedwater treatment unit to compensate for condensate losses. Condensate losses can occur, for example, due to the discharge of some condensate to remove non-volatile impurities accumulated in the water circulation. Alternatively, heat can be removed from the feedwater by reducing the pressure to evaporate a portion of the feedwater. However, there remains a need to improve known methods and steam generation devices in terms of the desired efficiency and thermal efficiency. Summary of the Invention
[0005] Therefore, the object of the present invention is to design and improve the methods and steam generating apparatus of the types mentioned at the beginning and explained in detail above, so as to achieve higher efficiency.
[0006] The above objective is achieved according to claim 1 by a method for generating steam using condensate returned in the form of feedwater, wherein...
[0007] - Feedwater is evaporated in a steam generator to form process steam;
[0008] - Process steam is at least partially condensed in the energy-consuming device, releasing heat and forming condensate;
[0009] - At least a portion of the condensate is introduced into the water treatment unit for treatment;
[0010] - The treated water in the water treatment unit is separated into a vapor phase and a liquid phase in a flash tank;
[0011] - The liquid phase of the feedwater is supplied to the steam generator and evaporated in the steam generator.
[0012] Forming process steam;
[0013] - The steam phase of the feedwater is supplied to the compressor for compression and to form process steam.
[0014] Furthermore, in the steam generating apparatus according to the preamble of claim 9, the objective is achieved by comprising: a flash tank for separating feedwater from the feedwater treatment unit into a vapor phase and a liquid phase; a reflux line for supplying the liquid phase of the feedwater to the steam generator; and a compressor for compressing the vapor phase of the feedwater.
[0015] According to the method of the invention, feedwater is evaporated in at least one steam generator to form process steam, which is then conveyed to an energy-consuming device where it is condensed and releases heat. The condensate formed therein is returned and treated in a feedwater treatment unit so that it can subsequently be used for re-evaporation in at least one steam generator. During the feedwater treatment, impurities, which may be gaseous, liquid, or solid, are removed. Before the treated feedwater is evaporated in the steam generator, it first partially expands in a so-called flash tank. During this process, a portion of the feedwater evaporates to form a vapor phase, carrying away heat from the remaining liquid phase of the feedwater, which is thus cooled in the flash tank. The liquid phase of the feedwater is then evaporated in the steam generator by means of flue gas, thereby enabling the extraction of more heat from the flue gas than would have been without the prior cooling in the flash tank. A particularly advantageous and commonly used method is to guide the feedwater through a piping system through the steam generator, in which the feedwater is indirectly, particularly in countercurrent, evaporated by the flue gas.
[0016] In contrast, the feedwater vapor phase, also cooled by evaporation in a flash tank, is supplied to a compressor, where it is compressed and heated. The compression and heating of the feedwater vapor phase proceeds to the point that process steam is also obtained in this manner. The pressure and / or temperature level of this process steam can be at least substantially equivalent to the pressure and / or temperature level of the process steam generated in the steam generator, but this is not mandatory. The process steam generated by the compressor is preferably used to heat industrial processes or other useful applications, thus enabling greater overall efficiency and effectiveness of the entire method.
[0017] A steam generating apparatus for producing process steam from feedwater, particularly when performing the aforementioned method, requires at least one steam generator and a feedwater treatment unit to process the condensed process steam into feedwater for re-evaporation in at least one steam generator. The steam generating apparatus includes an output device for conveying the process steam to an energy-consuming device, wherein, in a simple case, the output device may be a pipeline or similar device. Furthermore, the steam generating apparatus also has a return device for returning the condensate formed by the condensation of process steam in the energy-consuming device to the steam generating apparatus, particularly to the feedwater treatment unit. In the feedwater treatment unit, the condensate is preferably at least degassed. However, as an alternative or supplement, liquid or solid impurities may also be separated from the condensate, and if necessary, removed along with a portion of the condensate, and replaced with fresh water.
[0018] As a supplement, the steam generator includes a flash tank into which treated feedwater is introduced. Here, the feedwater is separated into a liquid phase and a vapor phase, the vapor phase being formed by the partial evaporation of feedwater due to a pressure drop within the flash tank. By evaporating the treated feedwater, the temperatures of both the liquid and vapor phases decrease relative to the original feedwater. This allows the liquid phase to absorb a larger portion of the heat from the flue gas in the steam generator, resulting in higher efficiency during steam generation. Furthermore, the vapor phase of the feedwater is not discarded as energy loss but is instead sent to a compressor for compression. The resulting process steam has high pressure and temperature levels, thus enabling it to be used as energy to drive industrial processes. It is also conceivable that the same industrial process could utilize process steam generated by a steam generator. However, these two streams of process steam could also be applied to different industrial processes.
[0019] As a compressor, this invention can, in principle, employ all known types of compressors, especially turbo compressors, reciprocating compressors, and screw compressors.
[0020] The method and the steam generating apparatus will be described together below, but it is not necessary to distinguish between the method and the steam generating apparatus separately in detail. Those skilled in the art can understand from the appropriate context which features pertain to the method and which pertain to the steam generating apparatus.
[0021] In a first particularly preferred embodiment of the method, the condensate is at least partially degassed in the feedwater treatment unit. Gases present in the feedwater can damage the steam generator. In particular, oxygen (O2) and / or carbon dioxide (CO2) can pose a problem, or may be present in significant quantities in the condensate of the process steam. Therefore, in many cases, it is preferable to remove oxygen (O2) and / or carbon dioxide (CO2) from the condensate in the feedwater treatment unit.
[0022] To degas the condensate in a feedwater treatment unit, regardless of the type of gas to be removed, it may be advantageous to introduce the condensate into the feedwater treatment unit together with heating steam. The heating steam heats the condensate, particularly directly. Due to the high temperature, the gas is expelled from the feedwater and preferably discharged from the feedwater treatment unit along with residual gas from the heating steam and / or the evaporated condensate.
[0023] To make the treatment of condensate for obtaining feedwater and the heating of industrial processes with process steam more energy-efficient, it is advantageous to feed condensate with a temperature between 60°C and 100°C, preferably 70°C to 80°C, and especially at least essentially 80°C, into the feedwater treatment unit. The higher the condensate temperature, the less heating steam is required for its treatment. The lower the condensate temperature, the greater the heat released to the industrial process to be heated. Furthermore, heat loss along the length of the pipeline should also be considered.
[0024] As an alternative or supplement, for the same reasons, the condensate can be treated in the feedwater treatment unit at a pressure between 1 bar and 2 bar, preferably 1.1 bar to 1.5 bar, and especially at least essentially 1.2 bar. The lower the pressure, the more heat can be released to the industrial process. However, a certain pressure is still required to adequately degas the condensate and ensure sufficient depressurization of the feedwater in the flash tank. Therefore, the feedwater temperature in the feedwater treatment unit is preferably above 100°C, wherein only a small amount of heating steam is needed when it is between 102°C and 108°C, and especially at least essentially 105°C. Simultaneously, sufficient depressurization and temperature reduction can be ensured in the flash tank.
[0025] To ensure adequate cooling of the liquid phase of the feedwater in an economical manner overall, it is advantageous in principle to operate the flash tank at an absolute pressure of 0.07 bar to 1.0 bar. The lower the pressure, the lower the temperature of the feedwater delivered to the steam generator. However, the corresponding negative pressure requires the generation of equipment and energy costs. Therefore, it is particularly preferred to operate the flash tank at a pressure between 0.2 bar and 1.0 bar, with at least essentially 0.4 bar being a good compromise in many cases. Based on the aforementioned pressure-related reasons, and considering the interdependence of pressure and temperature in the flash tank, as an alternative or supplement, the flash tank can be operated at a temperature between 40°C and 100°C, preferably between 60°C and 100°C. In many cases, at least essentially 75°C would constitute a fairly good and economical compromise.
[0026] To reduce the pressure in the flash tank to a level below that of the water treatment unit, and especially below ambient pressure, it is advantageous for simplicity to use a compressor to draw a corresponding negative pressure into the flash tank. The pressure in the flash tank must be set low enough to be at least below the pressure in the water treatment unit. Otherwise, partial evaporation and simultaneous cooling of the feedwater cannot be ensured within the flash tank.
[0027] Furthermore, for many applications, it is advantageous when the steam generator produces process steam at temperatures between 100°C and 450°C. In these cases, the advantages described in this method are particularly evident. This is even more applicable when the process steam temperature is between 100°C and 250°C. In many cases, when the process steam temperature is essentially between 130°C and 200°C, a good compromise emerges that allows for efficient operation of the steam generator.
[0028] The process steam generated by the compressor can be efficiently utilized when its temperature is between 100°C and 450°C. This is particularly applicable for temperatures between 100°C and 250°C, where a good compromise can also be achieved when the steam phase of the feedwater in the compressor is heated to approximately 100°C to 200°C.
[0029] To efficiently utilize process steam, at least part of the process steam obtained from the feedwater vapor phase in the compressor can be combined with process steam from the steam generator. The combined process steam can then be easily shared by the equipment in subsequent energy-consuming processes. This is further advantageous if the process steam to be combined from the steam generator and compressor has at least substantially the same temperature and / or at least substantially the same pressure. However, this is not mandatory.
[0030] However, depending on the requirements of the energy-consuming device, it is also conceivable to at least partially deliver the process steam obtained from the steam phase of the feedwater in the compressor to the energy-consuming device as independent process steam. This is particularly suitable for energy-consuming devices with heat requirements at different temperature levels, especially when the amount of heat required at different temperature levels varies.
[0031] However, the process steam obtained from the steam phase of the feedwater in the compressor can preferably be used, at least partially, directly as heating steam and delivered to the feedwater treatment unit. In this way, conversion losses, such as those caused by additional throttling, can be avoided to some extent.
[0032] In principle, heating steam can also be obtained, at least partially, without relying on a source of process steam, by reducing the pressure of the process steam through throttling. In this way, the feedwater treatment unit can operate in a simple manner and at a precisely adjustable temperature.
[0033] The advantages of this invention are particularly evident when a steam boiler is used as the steam generator for simplicity. Alternatively or as a supplement, condensate can be purposefully and specifically delivered to a water treatment device using a condensate pump.
[0034] To achieve simple and efficient partial evaporation of feedwater in a flash tank, it is advantageous to connect the feedwater treatment unit to the flash tank via a throttling valve. Alternatively or supplementarily, the liquid phase of the feedwater can be pumped to the steam generator. Evaporation can also be carried out reliably and precisely in this manner.
[0035] In the first particularly preferred design of the aforementioned steam generating device, the feedwater treatment unit is equipped with a heating steam supply line for heating the condensate. This allows the feedwater treatment unit to operate simply and efficiently. This is particularly suitable for situations where the condensate is directly heated by heating steam supplied via the heating steam line. However, it is not strictly limited to this situation; it is also possible to equip the feedwater treatment unit with a residual gas discharge line for discharging gases expelled from the condensate. This residual gas discharge line can discharge uncondensed heating steam or steam generated within the feedwater treatment unit, along with the gases expelled from the condensate. In principle, it is also possible to discharge only the gases expelled from the condensate through this residual gas discharge line, without discharging steam, i.e., discharging residual gas. However, this is not preferred in most cases, therefore the concept of a residual gas discharge line is still used here.
[0036] When a heating steam supply line is provided, it can be equipped with a throttling valve for simplicity, to generate heating steam by throttling the process steam. This enables defined operation of the feedwater treatment unit and is easily implemented on the equipment.
[0037] To combine and utilize the process steam generated by the steam generator and compressor, measures can be implemented to combine the process steam from the compressor with that from the steam generator. Alternatively, two independent process steam lines can be installed to separately deliver the process steam to the energy-consuming unit. This allows the process steam from the steam generator to be used separately from the process steam generated by the compressor. Alternatively, the compressor can also be connected to a heating steam supply line. In this way, the corresponding process steam can be used to drive the feedwater treatment unit in a simple and efficient manner.
[0038] Additional simplicity in equipment and method is achieved through the use of a steam boiler as the steam generator. This allows for cost-effective and reliable operation. From an energy and equipment perspective, it is advantageous when the feedwater treatment unit is connected to the flash tank via a throttling valve. The same applies to the return line equipped with a feedwater pump to deliver feedwater to the steam generator. To ensure that condensate is always returned to the feedwater treatment unit in the required amount, the feedwater treatment unit can also be equipped with a condensate pump to deliver condensate to the feedwater treatment unit. Attached Figure Description
[0039] The present invention will be further described below with reference to the accompanying drawings, which illustrate only one embodiment. In the drawings:
[0040] Figure 1 A schematic diagram of an industrial apparatus for implementing an industrial process is shown, incorporating a steam generation device according to the present invention.
[0041] Figure 2 It shows Figure 1 A schematic detail diagram of the steam generation apparatus shown. Detailed Implementation
[0042] exist Figure 1 An industrial apparatus A is exemplarily shown for performing industrial process P. The illustrated and preferred industrial apparatus A is a papermaking apparatus in which the industrial process P of paper production is carried out. Alternatively, many other industrial apparatus A can be considered within the framework of this invention for performing different industrial processes P, particularly those with significant heat requirements. Paper production is characterized by particularly high heat requirements because it is inherently quite energy-intensive.
[0043] exist Figure 2 The diagram shows a steam generating device 1, which supplies the required heat to the energy-consuming device V of industrial equipment A via an output device 2. This heat is utilized in the industrial process P of paper production as process steam 3. The process steam 3 is used as a heat source in the corresponding energy-consuming device V of industrial process P, where it is at least partially condensed, and the resulting condensate 4 is returned to the steam generating device 1 via a return device 5. Thus, the process steam 3 or condensate 4 is guided, at least substantially, in a cyclical manner, although in different states of matter. In the illustrated and therefore preferred steam generating device 1, the output device 2 and the return device 5 are configured as pipelines, specifically an output pipeline and a return pipeline. Figure 2 The energy-consuming device V is not shown in the diagram because its specific construction is not particularly significant in this case.
[0044] The condensate 4 returned via the reflux device 5 is guided into the feedwater treatment unit 7 by the condensate pump 6, where the condensate 4 is heated by the same introduced heating steam 8 via direct heat transfer, from 80°C to 105°C in this example. The pressure in the feedwater treatment unit 7 is set such that a vapor phase 9 exists in the feedwater treatment unit 7, and gases dissolved in the condensate, especially oxygen (O2) and carbon dioxide (CO2), are driven into the vapor phase. The vapor phase 9, along with the driven gases, is discharged through the residual gas discharge line 10. The feedwater treatment unit 7 then contains the correspondingly treated condensate 4 in the form of feedwater 11. This feedwater 11 is sent from the feedwater treatment unit 7 to the flash tank 12, where the feedwater 11 is depressurized by the throttle valve 21, so that partially treated feedwater is present in the flash tank 12.
[0045] Evaporation occurs at 11, thereby cooling the feedwater 11. In the flash tank 12, a vapor phase 13 and a liquid phase 14 of the feedwater 11 are thus formed, both of which are at significantly lower temperatures than the feedwater 11 treated in the feedwater treatment unit 7.
[0046] In the steam generating apparatus 1 shown and therefore preferred, a negative pressure is drawn into the flash tank 12 by the compressor 15, with the flash tank 12 correspondingly located on the suction side of the compressor 15. The pressure in the flash tank 12 is not only lower than the pressure in the feedwater treatment unit 7, but also lower than the ambient pressure. That is, it is an absolute pressure of less than 1 bar. The liquid phase 14 of the feedwater 11 remaining in the flash tank 12 is then pumped into the steam generator 17 via the feedwater pump 16 and the return line 22, where the feedwater 11 is evaporated in a manner known per se. Of course, two or more steam generators 17 may be provided, and preferably operated in parallel.
[0047] Steam generator 17 is a steam boiler in which fuel is burned to produce flue gas. This flue gas is guided along pipelines in which feedwater 11 is guided counter-currently to the flue gas, thereby being first heated, then evaporated, and superheated if necessary. At this point, the feedwater 11 is under absolute overpressure, causing it to be converted into process steam 18 in steam generator 17. This process steam can be suitably used as a heat source to heat industrial process P in energy-consuming device V.
[0048] In the illustrated and therefore preferred method, process steam 19 is supplied to process steam 18 generated in steam generator 17 via a merging device 24. The former is formed by compressing the steam phase 13 of feedwater 11 in compressor 15 connected to flash tank 12. The process steam 18 generated by steam generator 17 and process steam 19 generated by compressor 15 have substantially the same pressure in the illustrated and therefore preferred method. Their temperatures are also substantially the same. A portion of the correspondingly merged process steam 3 can be introduced into feedwater treatment unit 7 as heating steam 8 via throttle valve 20 and heating steam supply line 23 to heat the condensate 4 therein. The remaining portion of process steam 3 that is not needed to form heating steam 8 is transported to energy consumption unit V via output device 2 in the form of an output line, and the condensed process steam 3 is then returned to steam generation unit 1 as condensate 4 via a return device.
[0049] Explanation of reference numerals in the attached figures
[0050] 1 Steam generating device
[0051] 2 Output device
[0052] 3. Process Steam
[0053] 4. Condensate
[0054] 5. Reflux device
[0055] 6. Condensate pump
[0056] 7. Water treatment unit
[0057] 8. Heating Steam
[0058] 9. Vapor Phase
[0059] 10 Excess Gas Emission Pipeline
[0060] 11 Water supply
[0061] 12 flash evaporators
[0062] 13 Vapor Phase
[0063] 14 Liquid phase
[0064] 15 Compressors
[0065] 16 Water pump
[0066] 17 Steam generator
[0067] 18. Process steam, steam generator
[0068] 19. Process steam, compressor
[0069] 20 Throttling valve
[0070] 21 Throttling valve
[0071] 22 Return line
[0072] 23. Heated steam pipeline
[0073] 24. Convergence device
[0074] A Industrial Equipment
[0075] P Industrial Process
[0076] V Energy consumption device
Claims
1. A method for generating steam using condensate (4) returned in the form of feedwater (11), -The feedwater (11) is evaporated in the steam generator (17) to form process steam (3); -The process steam (3) is at least partially condensed in the energy-consuming device (V), releasing heat and forming condensate (4) in the process; -At least part of the condensate (4) is sent to the water treatment unit (7) for treatment; -The water (11) treated in the water treatment unit (7) is separated into a vapor phase (13) and a liquid phase (14) in the flash tank (12); -The liquid phase (14) of the feedwater (11) is fed into the steam generator (17) and evaporated in the steam generator (17) to form process steam (18); and -The steam phase (13) of the feedwater (11) is fed into the compressor (15) for compression and to form process steam (19).
2. The method according to claim 1, -The condensate (4) is at least partially degassed in the water treatment unit (7), particularly by removing oxygen (O2) and / or carbon dioxide (CO2), and - Preferably, the condensate (4) is fed into the water treatment unit (7) together with the heating steam (8) so as to heat the condensate (4) directly.
3. The method according to claim 1 or 2, -The condensate (4) is fed into the water treatment unit (7) at a temperature between 60°C and 100°C, preferably between 70°C and 80°C, especially at least substantially 80°C, and / or -The condensate (4) is degassed in the water treatment device (7) at a pressure between 1 bar and 2 bar, preferably between 1.1 bar and 1.5 bar, especially at least substantially 1.2 bar, and / or at a temperature above 100°C, preferably between 102°C and 108°C, especially at least substantially 105°C.
4. The method according to any one of claims 1 to 3, -The flash tank (12) operates at a pressure between 0.07 bar and 1.0 bar, preferably between 0.2 bar and 1.0 bar, especially at least substantially 0.4 bar, and / or -The flash tank (12) operates at a temperature between 40°C and 100°C, preferably between 60°C and 100°C, and especially at least 75°C.
5. The method according to any one of claims 1 to 4, - wherein the compressor (15) draws negative pressure in the flash tank (12) at least relative to the pressure of the water treatment unit (7), and / or - wherein the steam generator (17) and / or compressor (15) generate process steam (3,18,19) at a temperature between 100°C and 450°C, preferably between 100°C and 250°C, and especially at least substantially 200°C.
6. The method according to any one of claims 1 to 5, -The steam phase (13) of the feedwater (11) compressed in the compressor (15) is combined with the process steam (18) from the steam generator (17) and / or sent as separate process steam (19) to the energy-consuming unit (V), and / or sent as heating steam (8) to the feedwater treatment unit (7), and / or -The heating steam (8) is provided at least in part by process steam (3,19) throttled by the throttle valve (20).
7. The method according to any one of claims 1 to 6, -Where the steam generator (17) is a steam boiler, and / or -The condensate (4) is sent to the water treatment device (7) by the condensate pump (6).
8. The method according to any one of claims 1 to 7, -The water treatment unit (7) is connected to the flash tank (12) via a throttle valve (21), and / or -The liquid phase (14) of the feedwater (11) is sent to the steam generator (17) by the feedwater pump (16).
9. A steam generating apparatus (1) for generating steam from condensate (4) returned in the form of feedwater (11), preferably using the method according to any one of claims 1 to 8, the steam generating apparatus comprising: a steam generator (17) for generating process steam (3, 18); an output device (2) for an energy-consuming device (V) to form condensate (4) by condensing the process steam (3); a return device (5) for conveying the condensate (4); and a feedwater treatment device (7) for treating the condensate (4) to form feedwater (11); Its features are, The device includes: a flash tank (12) for separating feedwater (11) from feedwater treatment unit (7) into a vapor phase (13) and a liquid phase (14); a return line (22) for conveying the liquid phase (14) of feedwater (11) to a steam generator (17); and a compressor (15) for compressing the vapor phase (13) of feedwater (11).
10. The steam generating apparatus according to claim 9, Its features are, The water treatment unit (7) is equipped with a heating steam line (23) for heating the condensate (4) in particular directly, and / or is equipped with a residual gas discharge line (10) for discharging the gas expelled from the condensate (4), and preferably the heating steam line (23) is equipped with a throttle valve (20) for generating heating steam (8) by throttling the process steam (3).
11. The steam generating apparatus according to claim 9 or 10, Its features are, The system is equipped with a merging device (24) for process steam (19) from the compressor (15) and process steam (18) from the steam generator (17), or it is equipped with two independent process steam lines for separately delivering process steam (18, 19) to the energy-consuming device (V), or the compressor (15) is directly connected to the heating steam line (23).
12. The steam generating apparatus according to any one of claims 9 to 11, Its features are, The steam generator (17) is a steam boiler, and / or the feedwater treatment device (7) is connected to the flash tank (12) via a throttle valve (21), and / or the return line (22) is equipped with a feedwater pump (16) for sending feedwater (11) to the steam generator (17), and / or the feedwater treatment device (7) is equipped with a condensate pump (6) for sending condensate (4) into the feedwater treatment device (7).