Steam production system for producing steam

Abstract

The utility model discloses a steam production system for producing steam, and relates to the technical field of steam production, the steam production system for producing steam comprises a primary flash evaporation unit and a secondary flash evaporation unit, the primary flash evaporation unit comprises a primary flash evaporation tank and a primary steam compressor, and the secondary flash evaporation unit comprises a secondary flash evaporation tank and a secondary steam compressor. The primary flash evaporation unit comprises a primary flash evaporation tank and a primary steam compressor, the primary flash evaporation tank is suitable for being communicated with a water supply pipeline, a compressor inlet of the primary steam compressor is communicated with the primary flash evaporation tank, and a compressor outlet of the primary steam compressor is suitable for being communicated with a user steam pipeline; the secondary steam compressor is connected between the primary flash tank and the secondary flash tank in series, and the primary flash tank is communicated with the secondary flash tank. According to the steam production system for producing steam, irreversible loss in the flash evaporation process can be reduced to the maximum extent, the power consumption and equipment cost of the steam compressor can be reduced, and the energy utilization rate of low-temperature hot water can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of steam production, in particular to a steam production system for producing steam. Background Art

[0002] In the related art, the existing steam production system can prepare low-pressure steam by throttling and flashing of low-temperature hot water. However, there are large irreversible losses in the throttling and flashing process of the existing steam production system, the energy utilization rate of the low-temperature hot water is low, the power consumption of the steam compressor is large, and the equipment investment and operation energy cost of the steam compressor are high. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a steam production system for producing steam, which can minimize the irreversible loss in the flashing process, reduce the power consumption and equipment cost of the steam compressor, and improve the energy utilization rate of low-temperature hot water.

[0004] The steam production system for producing steam according to an embodiment of the utility model includes: a primary flashing unit and a secondary flashing unit. The primary flashing unit includes a primary flashing tank and a primary steam compressor. The primary flashing tank is adapted to be connected to a water supply pipeline. The compressor inlet of the primary steam compressor is connected to the primary flashing tank, and the compressor outlet of the primary steam compressor is adapted to be connected to a user steam pipeline. The secondary flashing unit includes a secondary flashing tank and a secondary steam compressor. The secondary steam compressor is connected in series between the primary flashing tank and the secondary flashing tank, and the primary flashing tank is connected to the secondary flashing tank.

[0005] The steam production system for producing steam according to an embodiment of the present application can minimize the irreversible loss in the flashing process by setting up multiple flashing tanks and multiple steam compressors, can achieve complete inter-stage cooling of the secondary superheated steam, reduce the steam temperature at the compressor outlet, thereby reducing the power consumption and equipment cost of the steam compressor, and can also improve the energy utilization rate of low-temperature hot water.

[0006] According to some embodiments of the utility model, a primary flashing tank outlet is formed at the top of the primary flashing tank, and the compressor inlet of the primary steam compressor is connected to the primary flashing tank outlet.

[0007] According to some embodiments of the utility model, a primary flashing tank inlet is formed at the bottom of the primary flashing tank, and the primary flashing tank inlet is connected to the compressor outlet of the corresponding secondary steam compressor.

[0008] According to some embodiments of the present utility model, a secondary flash tank outlet is formed at the top of the secondary flash tank, and the secondary flash tank outlet is communicated with the compressor inlet of the secondary steam compressor.

[0009] According to some embodiments of the present utility model, the primary flash tank and the secondary flash tank are communicated through a first communication pipeline, so that the liquid in the primary flash tank flows into the secondary flash tank.

[0010] According to some embodiments of the present utility model, there are multiple secondary flash units, and the multiple secondary flash units are connected in series in sequence. The secondary flash tank of the secondary flash unit at one end is connected in series with the primary flash tank through the corresponding secondary steam compressor, and adjacent two secondary flash tanks are connected in series through the corresponding secondary steam compressor, and adjacent two secondary flash tanks are communicated.

[0011] According to some embodiments of the present utility model, a secondary flash tank inlet is formed at the bottom of the secondary flash tank, the secondary flash tank inlet is communicated with the compressor outlet of the secondary steam compressor of another secondary flash unit, and the secondary flash tank inlet of the secondary flash tank of the secondary flash unit at the other end is configured as a water return port.

[0012] According to some embodiments of the present utility model, adjacent two secondary flash tanks are communicated through a second communication pipeline, so that the liquid in the secondary flash tank close to the primary flash unit among adjacent two secondary flash tanks flows into the secondary flash tank away from the primary flash unit.

[0013] According to some embodiments of the present utility model, the compressor outlet of each secondary steam compressor is adapted to be communicated with a user steam pipeline.

[0014] According to some embodiments of the present utility model, the primary flash unit and the secondary flash unit have the same structure.

[0015] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0017] Figure 1 is a schematic diagram of a steam production system for producing steam according to an embodiment of the present application.

[0018] Reference numerals:

[0019] Steam production system 1

[0020] Primary flash tank 10, primary flash tank outlet 11, primary flash tank inlet 12

[0021] Primary steam compressor 20

[0022] Secondary flash tank 30, secondary flash tank outlet 31, secondary flash tank inlet 32, water return port 33

[0023] Secondary steam compressor 40, water supply pipeline 50, user steam pipeline 60, first communication pipeline 70, second communication pipeline 80

[0024] Primary flash unit 100, secondary flash unit 200 Detailed implementation manners

[0025] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0026] Reference will be made below Figure 1 to describe a steam production system 1 for producing steam according to an embodiment of the present utility model.

[0027] The steam production system 1 for producing steam according to an embodiment of the present utility model, as Figure 1 shown, the steam production system 1 includes: a primary flash unit 100 and a secondary flash unit 200. The primary flash unit 100 includes a primary flash tank 10 and a primary steam compressor 20. The primary flash tank 10 is adapted to communicate with the water supply pipeline 50. The compressor inlet of the primary steam compressor 20 communicates with the primary flash tank 10, and the compressor outlet of the primary steam compressor 20 is adapted to communicate with the user steam pipeline 60. The secondary flash unit 200 includes a secondary flash tank 30 and a secondary steam compressor 40. The secondary steam compressor 40 is connected in series between the primary flash tank 10 and the secondary flash tank 30, and the primary flash tank 10 and the secondary flash tank 30 communicate with each other.

[0028] It should be noted that in the related art, the existing steam production system can prepare low-pressure steam through throttling flash evaporation of low-temperature hot water. However, there are relatively large irreversible losses in the throttling flash evaporation process of the existing steam production system, the energy utilization rate of the low-temperature hot water is low, the power consumption of the steam compressor is relatively large, and the equipment investment and operation energy cost of the steam compressor are high.

[0029] Based on this, an embodiment of the present application proposes a steam production system 1 for producing steam. The primary flash unit 100 includes a primary flash tank 10 and a primary steam compressor 20. The primary flash tank 10 is provided at the end of the steam production system 1. The primary flash tank 10 and the secondary flash tank 30 are pressure vessels that can cause the saturated water in the primary flash tank 10 and the secondary flash tank 30 to expand rapidly under reduced pressure, thereby generating flash steam. A throttle valve may be provided in the primary flash tank 10 and the secondary flash tank 30. The pressure in the primary flash tank 10 and the secondary flash tank 30 is lower than the external environment. When saturated water or hot water enters the flash tank with a lower pressure through the throttle valve, due to the sudden drop in pressure, part of the water will flash into steam, and the temperature of the remaining liquid will decrease, achieving temperature reduction, thereby realizing the throttling and cooling of saturated water or hot water.

[0030] In an embodiment of the present application, the primary flash tank 10 is adapted to be connected to the water supply pipeline 50. Hot water can enter the primary flash tank 10 through the water supply pipeline 50. A throttle valve may be provided in the primary flash tank 10. Hot water can enter the primary flash tank 10 with a pressure lower than the external environment through the throttle valve, thereby realizing the throttling and cooling of hot water. Saturated steam and saturated water can be generated in the primary flash tank 10. The saturated steam and saturated water can be separated in the primary flash tank 10. The compressor inlet of the primary steam compressor 20 is connected to the primary flash tank 10. The saturated steam in the primary flash tank 10 can enter the primary steam compressor 20 through the compressor inlet of the primary steam compressor 20. The saturated steam can be compressed to the steam pressure required by the user in the primary steam compressor 20. The compressor outlet of the primary steam compressor 20 is connected to the user steam pipeline 60. The saturated steam compressed to the steam pressure required by the user enters the user steam pipeline 60 through the compressor outlet, thereby meeting the needs of the user.

[0031] There can be multiple secondary flash units 200. The multiple secondary flash units 200 and the primary flash unit 100 together constitute a steam production system 1. The secondary flash unit 200 includes a secondary flash tank 30 and a secondary steam compressor 40. The pressure in the secondary flash tank 30 is lower than the pressure in the primary flash tank 10, so that the saturation temperature of water in the secondary flash tank 30 is lower than the saturation temperature of water in the primary flash tank 10. The primary flash tank 10 and the secondary flash tank 30 are connected. A part of the saturated water generated in the primary flash tank 10 can enter the secondary flash tank 30 for throttling and cooling. Saturated steam and saturated water are generated in the secondary flash tank 30. The saturated steam and saturated water generated by the secondary flash tank 30 can be separated in the secondary flash tank 30. The secondary steam compressor 40 is connected in series between the primary flash tank 10 and the secondary flash tank 30. The secondary steam compressor 40 is respectively connected to the primary flash tank 10 and the secondary flash tank 30. The saturated steam generated by the secondary flash tank 30 can enter the secondary steam compressor 40. The saturated steam generated by the secondary flash tank 30 is compressed in the secondary steam compressor 40. The saturated steam generated by the secondary flash tank 30 is compressed into superheated steam in the secondary steam compressor 40. The secondary steam compressor 40 is provided with a compressor outlet. The superheated steam in the secondary steam compressor 40 can enter the primary flash tank 10 through the compressor outlet of the secondary steam compressor 40. The superheated steam exchanges heat with the saturated water in the primary flash tank 10. The superheated steam is cooled to the saturation temperature and forms saturated steam, achieving complete inter-stage cooling. The saturated steam enters the primary steam compressor 20 and is compressed to the steam pressure required by the user.

[0032] The saturated steam generated in the primary flash tank 10 can enter the primary steam compressor 20 and be compressed to the steam pressure required by the user. The saturated water generated in the primary flash tank 10 can enter the secondary flash tank 30 for throttling and cooling. The saturated steam generated in the secondary flash tank 30 can enter the secondary steam compressor 40 to form superheated steam. The superheated steam can enter the primary flash tank 10. The superheated steam can be cooled in the primary flash tank 10 to achieve complete inter-stage cooling. Through the setting of the multi-stage flash process, the irreversible loss in the flash process can be minimized. The pressures in the flash tanks of different stages are different, so that the saturation temperatures of the hot water in the flash tanks of different stages are also different, minimizing the power consumption of the steam compressor. By setting up multi-stage flash tanks and multi-stage steam compressors, complete inter-stage cooling of the secondary superheated steam can be achieved, reducing the steam temperature at the compressor outlet, thereby reducing the power consumption and equipment cost of the steam compressor.

[0033] In some embodiments of the present invention, a primary flash tank outlet 11 is formed at the top of the primary flash tank 10. The compressor inlet of the primary steam compressor 20 is connected to the primary flash tank outlet 11.

[0034] The primary flash tank 10 is connected to the primary steam compressor 20. A primary flash tank outlet 11 is formed at the top of the primary flash tank 10. The primary steam compressor 20 has a compressor inlet, and the compressor inlet of the primary steam compressor 20 is connected to the primary flash tank outlet 11. The compressor inlet of the primary steam compressor 20 and the primary flash tank outlet 11 can be connected through a pipeline. The saturated steam in the primary flash tank 10 can flow towards the top of the primary flash tank 10, and the saturated steam can flow out from the primary flash tank outlet 11 and enter the primary steam compressor 20 through the compressor inlet of the primary steam compressor 20, facilitating the inflow of the saturated steam in the primary flash tank 10 into the primary steam compressor 20, realizing the compression of the saturated steam in the primary steam compressor 20, enabling the saturated steam to be compressed to the steam pressure required by the user, thereby realizing the function of the steam production system 1 to produce steam and meeting the needs of the user.

[0035] In some embodiments of the present invention, a primary flash tank inlet 12 is formed at the bottom of the primary flash tank 10, and the primary flash tank inlet 12 is communicated with the compressor outlet of the corresponding secondary steam compressor 40.

[0036] The primary flash unit 100 and the secondary flash unit 200 are connected in series. The secondary steam compressor 40 is connected in series between the primary flash tank 10 and the secondary flash tank 30. The primary flash tank 10 is connected to the corresponding secondary steam compressor 40. A primary flash tank inlet 12 is formed at the bottom of the primary flash tank 10. A compressor outlet may be formed at the top of the secondary steam compressor 40. The primary flash tank inlet 12 is communicated with the compressor outlet of the corresponding secondary steam compressor 40. The superheated steam generated in the secondary steam compressor 40 can flow out from the compressor outlet and enter the primary flash tank 10 through the primary flash tank inlet 12, facilitating the inflow of the superheated steam generated in the secondary steam compressor 40 into the primary flash tank 10. The superheated steam can exchange heat with the saturated water in the primary flash tank 10, and the superheated steam is cooled to the saturated temperature, realizing the complete inter-stage cooling of the superheated steam, which is beneficial to reducing the steam temperature at the compressor outlet, thereby reducing the power consumption and equipment cost of the steam compressor.

[0037] In some embodiments of the present invention, a secondary flash tank outlet 31 is formed at the top of the secondary flash tank 30, and the secondary flash tank outlet 31 is communicated with the compressor inlet of the secondary steam compressor 40.

[0038] In a secondary flash unit 200, a secondary flash tank 30 is connected to a secondary steam compressor 40. A secondary flash tank outlet 31 is formed at the top of the secondary flash tank 30, and a compressor inlet is formed in the corresponding secondary steam compressor 40. The secondary flash tank outlet 31 communicates with the compressor inlet of the corresponding secondary steam compressor 40. The saturated steam generated by the secondary flash tank 30 can enter the corresponding secondary steam compressor 40, and the saturated steam generated by the secondary flash tank 30 is compressed in the corresponding secondary steam compressor 40. The saturated steam is compressed into superheated steam in the corresponding secondary steam compressor 40, thereby realizing the further utilization of the saturated steam and reducing the energy loss in the steam production process. By forming the secondary flash tank outlet 31 at the top of the secondary flash tank 30, it is convenient for the saturated steam in the secondary flash tank 30 to flow into the secondary steam compressor 40.

[0039] In some embodiments of the present invention, the primary flash tank 10 and the secondary flash tank 30 are connected through a first communication pipeline 70 so that the liquid in the primary flash tank 10 flows into the secondary flash tank 30. The saturated water generated in the primary flash tank 10 can enter the secondary flash tank 30 through the first communication pipeline 70. The saturated water generated in the primary flash tank 10 can be throttled and cooled in the secondary flash tank 30. The temperature in the secondary flash tank 30 is lower than that in the primary flash tank 10. The saturated water generated by the primary flash tank 10 can be reused in the secondary flash tank 30, which is beneficial to improving the energy utilization rate of low-temperature hot water.

[0040] In some embodiments of the present invention, there are multiple secondary flash units 200, and the multiple secondary flash units 200 are connected in series in sequence. The secondary flash tank 30 of the secondary flash unit 200 at one end is connected in series with the primary flash tank 10 through the corresponding secondary steam compressor 40. Adjacent two secondary flash tanks 30 are connected in series through the corresponding secondary steam compressors 40, and adjacent two secondary flash tanks 30 communicate with each other.

[0041] There can be multiple secondary flash units 200. The primary flash unit 100 and the multiple secondary flash units 200 together constitute a steam production system 1. The multiple secondary flash units 200 are connected in series in sequence. The secondary flash tank 30 of the secondary flash unit 200 at one end is connected in series with the primary flash tank 10 through the corresponding secondary steam compressor 40. The secondary steam compressor 40 of the secondary flash unit 200 at one end is connected in series between the corresponding secondary flash tank 30 and the primary flash tank 10, so that the saturated steam in the corresponding secondary flash tank 30 can be compressed into superheated steam in the corresponding secondary steam compressor 40, and the superheated steam can be further completely cooled between stages in the primary flash tank 10.

[0042] Two secondary flash tanks 30 in two adjacent secondary flash units 200 are connected in series through a secondary steam compressor 40 in the lower-level secondary flash unit 200, so that after the compression of the lower-level saturated steam is achieved, the inter-stage complete cooling of superheated steam can be further achieved. Moreover, two adjacent secondary flash tanks 30 are communicated, and the saturated water in the secondary flash tank 30 can flow into the secondary flash tank 30 of the next level. The saturated water in the secondary flash tank 30 undergoes flashing and throttling to reduce the temperature, realizing the reuse of saturated water by the steam production system 1, improving the utilization rate of energy in low-temperature hot water, and reducing energy loss. By arranging a plurality of secondary flash units 200, the steam production system 1 can carry out a process of multi-stage flashing, multi-stage compression, and inter-stage complete cooling to prepare steam.

[0043] In some embodiments of the present invention, a secondary flash tank inlet 32 is formed at the bottom of the secondary flash tank 30. The secondary flash tank inlet 32 is communicated with the compressor outlet of the secondary steam compressor 40 of another secondary flash unit 200, and the secondary flash tank inlet 32 of the secondary flash tank 30 of the secondary flash unit 200 located at the other end is configured as a water return port 33.

[0044] A secondary flash tank inlet 32 is formed at the bottom of the secondary flash tank 30, and a compressor inlet is formed in the secondary steam compressor 40 of another secondary flash unit 200. The secondary flash tank inlet 32 is communicated with the compressor outlet of the secondary steam compressor 40 of another secondary flash unit 200. The superheated steam generated in the secondary steam compressor 40 of another secondary flash unit 200 can flow out through the compressor outlet and enter the secondary flash tank 30 through the secondary flash tank inlet 32, and is cooled to the saturation temperature in the secondary flash tank 30, realizing the inter-stage complete cooling of superheated steam. It is convenient for the superheated steam in the secondary steam compressor 40 of another secondary flash unit 200 to flow into the secondary flash tank 30.

[0045] The secondary flash tank inlet 32 of the secondary flash tank 30 of the secondary flash unit 200 located at the other end of the steam production system 1 is configured as a water return port 33. Hot water enters the steam production system 1 from a hot water supply device through a water supply pipeline 50, and finally flows back to the hot water supply device through the water return port 33 of the secondary flash unit 200 located at the other end of the steam production system 1, thereby realizing the recycling of water and saving energy.

[0046] In some embodiments of the present invention, two adjacent secondary flash tanks 30 are communicated through a second communication pipeline 80, so that the liquid in the secondary flash tank 30 closer to the primary flash unit 100 among two adjacent secondary flash tanks 30 flows into the secondary flash tank 30 away from the primary flash unit 100.

[0047] Two adjacent secondary flash tanks 30 are connected. Two adjacent secondary flash tanks 30 are connected by a second connecting pipeline 80. A plurality of secondary flash units 200 are connected in series in the steam production system 1 in sequence. The liquid in the secondary flash tank 30 closer to the primary flash unit 100 among two adjacent secondary flash tanks 30 can flow into the secondary flash tank 30 farther from the primary flash unit 100. During the process of producing steam, saturated water is generated in the secondary flash tank 30 closer to the primary flash unit 100. The saturated water in the secondary flash tank 30 closer to the primary flash unit 100 can enter the secondary flash tank 30 farther from the primary flash unit 100 through the second connecting pipeline 80, realizing throttling and temperature reduction of the saturated water in the next-level secondary flash tank 30, realizing the reuse of the saturated water, and being beneficial to energy conservation and consumption reduction of the steam production system 1.

[0048] In some embodiments of the present utility model, the compressor outlet of each secondary steam compressor 40 is adapted to be connected to a user steam pipeline 60.

[0049] The compressor outlet of the primary steam compressor 20 is connected to the user steam pipeline 60. The compressor outlet of each secondary steam compressor 40 can also be connected to the user steam pipeline 60. There can be multiple user steam pipelines 60. The compressor outlet of each secondary steam compressor 40 is provided with a user steam pipeline 60 connected thereto. The steam in each secondary steam compressor 40 can be discharged from the user steam pipeline 60 connected thereto. When steam users have various steam pressure requirements, steam can be led out from the compressor outlets of the corresponding pressure grades for use, enabling the steam production system 1 to be applicable to steam users with various steam pressure requirements, which is beneficial to improving the versatility of the steam production system 1.

[0050] In some embodiments of the present utility model, the primary flash unit 100 and the secondary flash unit 200 have the same structure.

[0051] The primary flash unit 100 includes a primary flash tank 10 and a primary steam compressor 20. The secondary flash unit 200 includes a secondary flash tank 30 and a secondary steam compressor 40. The primary flash unit 100 and the secondary flash unit 200 have the same structure. The primary flash tank 10 and the secondary flash tank 30 have the same structure. The primary steam compressor 20 and the secondary steam compressor 40 have the same structure. The same unit structure makes the overall steam production system 1 more standardized, facilitating design and maintenance, enabling batch production of multi-stage flash units, and reducing production costs.

[0052] Other components and operations of the steam production system 1 for producing steam according to the embodiments of the present utility model are known to those of ordinary skill in the art, and will not be described in detail here.

[0053] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0054] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A steam production system (1) for producing steam, characterized in that: include: A primary flash unit (100), the primary flash unit (100) comprising a primary flash tank (10) and a primary steam compressor (20), the primary flash tank (10) being adapted to be in communication with a water supply pipeline (50), a compressor inlet of the primary steam compressor (20) being in communication with the primary flash tank (10), and a compressor outlet of the primary steam compressor (20) being adapted to be in communication with a user steam pipeline (60); A secondary flash unit (200), the secondary flash unit (200) comprising a secondary flash tank (30) and a secondary steam compressor (40), the secondary steam compressor (40) being connected in series between the primary flash tank (10) and the secondary flash tank (30), the primary flash tank (10) and the secondary flash tank (30) being in communication.

2. The steam production system (1) for producing steam according to claim 1, characterized in that: A primary flash tank outlet (11) is formed at the top of the primary flash tank (10), and a compressor inlet of the primary steam compressor (20) is connected to the primary flash tank outlet (11).

3. The steam production system (1) for producing steam according to claim 1, characterized in that: A primary flash tank inlet (12) is formed at the bottom of the primary flash tank (10), and the primary flash tank inlet (12) is communicated with a compressor outlet of the corresponding secondary steam compressor (40).

4. The steam production system (1) for producing steam according to claim 1, characterized in that A secondary flash tank outlet (31) is formed at the top of the secondary flash tank (30), and the secondary flash tank outlet (31) is communicated with the compressor inlet of the secondary steam compressor (40).

5. The steam production system (1) for producing steam according to claim 1, characterized in that: The primary flash tank (10) and the secondary flash tank (30) are connected via a first connecting pipe (70) so that the liquid in the primary flash tank (10) flows into the secondary flash tank (30).

6. The steam production system (1) for producing steam according to claim 1, characterized in that There are a plurality of secondary flash units (200), and the plurality of secondary flash units (200) are connected in series in sequence. The secondary flash tank (30) of the secondary flash unit (200) located at one end is connected in series with the primary flash tank (10) via the corresponding secondary steam compressor (40), and two adjacent secondary flash tanks (30) are connected in series via the corresponding secondary steam compressor (40), and the two adjacent secondary flash tanks (30) are in communication.

7. The steam production system (1) for producing steam according to claim 6, characterized in that A secondary flash tank inlet (32) is formed at the bottom of the secondary flash tank (30), and the secondary flash tank inlet (32) is connected to the compressor outlet of the secondary steam compressor (40) of another secondary flash unit (200), and the secondary flash tank inlet (32) of the secondary flash tank (30) of the secondary flash unit (200) located at the other end is configured as a water return port (33).

8. The steam production system (1) for producing steam according to claim 6, characterized in that Two adjacent secondary flash tanks (30) are connected via a second connecting pipe (80) so that liquid in the secondary flash tank (30) close to the primary flash unit (100) of the two adjacent secondary flash tanks (30) flows into the secondary flash tank (30) away from the primary flash unit (100).

9. A steam production system (1) for producing steam according to any one of claims 1 to 8, characterized in that: The compressor outlet of each secondary steam compressor (40) is suitable for communicating with a user steam pipeline (60).

10. The steam production system (1) for producing steam according to any one of claims 1 to 8, characterized in that: The primary flash unit (100) and the secondary flash unit (200) have the same structure.

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