A high pressure condensate recovery system

Abstract

The embodiment of the utility model provides a kind of high pressure condensate water recovery system, it is related to heat energy recovery technical field.High pressure condensate water recovery system includes flash tank, first conveying pipe, compressor and second conveying pipe, and flash tank, first conveying pipe, compressor and second conveying pipe are sequentially head-to-tail intercommunication.High pressure condensate water produces flash steam after passing through flash tank, is transported to compressor by first conveying pipe and is pressurized, and the high-temperature high-pressure steam after pressurization passes through second conveying pipe, enters flash tank again, and exchanges heat with high pressure condensate water in flash tank, to improve the flash effect, can produce more flash steam, and then improve the recycling rate of high pressure condensate water, reduce the energy consumption of overall system, and meet the demand of relevant industry to high pressure steam.

Description

Technical Field

[0001] This utility model relates to the field of heat energy recovery technology, and more specifically, to a high-pressure condensate recovery system. Background Technology

[0002] In industries such as petrochemicals, steam production and utilization are crucial processes, generating a large amount of high-pressure condensate. Because of its high pressure and temperature, this condensate has a correspondingly higher boiling point, preventing it from boiling and producing steam. To effectively utilize this resource, flash tanks are typically used for recovery and treatment, generating flash steam through a flash evaporation process, which is then supplied to medium- and low-pressure steam-using equipment.

[0003] However, existing methods for recovering and utilizing high-pressure condensate have problems such as low recovery rate and high energy consumption, and are difficult to meet the demand for high-pressure steam in industries such as petrochemicals. Utility Model Content

[0004] The purpose of this invention is to provide a high-pressure condensate recovery system that can improve the recovery and utilization rate of high-pressure condensate, reduce the overall system energy consumption, and meet the demand of relevant industries for high-pressure steam.

[0005] The embodiments of this utility model are implemented as follows:

[0006] An embodiment of this utility model provides a high-pressure condensate recovery system, including a flash tank, a first delivery pipe, a compressor, and a second delivery pipe;

[0007] The flash tank, the first delivery pipe, the compressor, and the second delivery pipe are connected end to end in sequence.

[0008] In an optional embodiment, the high-pressure condensate recovery system further includes a steam-water separator, the first delivery pipe includes a first connecting pipe and a second connecting pipe, and the flash tank, the first connecting pipe, the steam-water separator, the second connecting pipe and the compressor are connected in sequence.

[0009] In an optional embodiment, the high-pressure condensate recovery system further includes an intake regulating valve, which is disposed on the second connecting pipe.

[0010] In an optional embodiment, the steam-water separator is located above the flash tank, and the first connecting pipe is connected to the top of the flash tank.

[0011] In an optional embodiment, the high-pressure condensate recovery system further includes a heat exchanger and an output pipe. The heat exchanger is disposed inside the flash tank, and the compressor, the second delivery pipe, the heat exchanger, and the output pipe are connected in sequence.

[0012] The heat exchanger is used to exchange heat with the high-pressure condensate in the flash tank.

[0013] In an optional embodiment, the high-pressure condensate recovery system further includes a third conveying pipe, the two ends of which are respectively connected to the second conveying pipe and the flash tank.

[0014] In an optional embodiment, the high-pressure condensate recovery system further includes a reflux valve disposed on the third delivery pipe.

[0015] In an alternative embodiment, the heat exchanger is located at the bottom of the flash tank.

[0016] In an optional embodiment, the output pipe and the second delivery pipe are respectively connected to the opposite sides of the heat exchanger.

[0017] In an optional embodiment, the high-pressure condensate recovery system further includes an input pipe connected to the flash tank.

[0018] The beneficial effects of this utility model embodiment include:

[0019] The high-pressure condensate recovery system includes a flash tank, a first delivery pipe, a compressor, and a second delivery pipe, which are connected sequentially. The flash steam generated from the high-pressure condensate in the flash tank is transported to the compressor via the first delivery pipe for pressurization. The pressurized high-temperature, high-pressure steam then re-enters the flash tank via the second delivery pipe to exchange heat with the high-pressure condensate inside, thereby improving the flashing effect and generating more flash steam. The high-pressure steam after heat exchange can be directly used in downstream processes, eliminating the need for long delivery pipelines and multiple heat exchange devices. This improves the high-pressure condensate recovery rate, reduces the overall system's energy consumption and construction costs, and meets the high-pressure steam requirements of relevant industries. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the high-pressure condensate recovery system provided in this embodiment of the utility model.

[0022] Icons: 100-High-pressure condensate recovery system; 10-Flash tank; 21-First delivery pipe; 211-First connecting pipe; 212-Second connecting pipe; 22-Second delivery pipe; 23-Third delivery pipe; 30-Compressor; 40-Steam-water separator; 51-Inlet regulating valve; 52-Return valve; 60-Heat exchanger; 71-Outlet pipe; 72-Inlet pipe. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] As described in the background section, in order to effectively utilize the high-pressure condensate resource, a flash tank is usually used for recycling and processing. Flash steam is generated through the flash evaporation process and then supplied to medium and low-pressure steam-using equipment.

[0030] However, the inventors discovered significant limitations in existing high-pressure condensate recovery methods. First, these methods are primarily suitable for low- to medium-pressure industrial and civil applications, failing to meet the high-pressure steam demands of industries such as petrochemicals. Second, achieving high-pressure condensate recovery often requires long pipelines and multiple heat exchangers, increasing system complexity and construction costs. Furthermore, the long transport distance necessitates a massive pipeline network, inevitably leading to energy losses and resulting in low high-pressure condensate recovery rates and high overall energy consumption.

[0031] Based on this, please refer to Figure 1 This utility model provides a high-pressure condensate recovery system 100, which can effectively improve the aforementioned technical problems. Specifically, it can increase the recovery and utilization rate of high-pressure condensate, reduce the overall system energy consumption, and meet the demand for high-pressure steam in relevant industries. The high-pressure condensate recovery system 100 will be described in detail below.

[0032] Figure 1 This is a schematic diagram of the high-pressure condensate recovery system 100 provided in this embodiment, combined with... Figure 1 The high-pressure condensate recovery system 100 includes a flash tank 10, a first delivery pipe 21, a compressor 30, and a second delivery pipe 22, which are connected end to end in sequence.

[0033] As is easily understood, the flash steam generated after the high-pressure condensate passes through the flash tank 10 is transported to the compressor 30 for pressurization via the first conveying pipe 21. The pressurized high-temperature and high-pressure steam then enters the flash tank 10 again via the second conveying pipe 22 to exchange heat with the high-pressure condensate inside the flash tank 10, thereby improving the flash evaporation effect and generating more flash steam. The high-pressure steam after heat exchange can be directly supplied to downstream processes without the need for long conveying pipelines and multiple heat exchange devices, thus improving the high-pressure condensate recovery rate, reducing the overall system's energy consumption and construction costs, and meeting the high-pressure steam requirements of relevant industries.

[0034] It should be noted that when the high-pressure condensate enters the flash tank 10, it will release flash steam (secondary steam) when the pressure decreases. The flash tank 10 is used to separate the high-temperature and high-pressure condensate into vapor and liquid, so that the denser condensate flows into the bottom of the flash tank 10, and the less dense secondary steam flows out from the top pipe of the flash tank 10, thus achieving vapor-water separation. At this time, the flash steam delivered to the first delivery pipe 21 will inevitably still carry some liquid vapor.

[0035] Therefore, to ensure that the steam entering the compressor 30 is entirely gaseous and to prevent liquid water from entering the compressor 30 and causing damage to its high-speed rotating centrifugal impeller or other adverse effects, in this embodiment, the high-pressure condensate recovery system 100 also includes a steam-water separator 40. The first delivery pipe 21 includes a first connecting pipe 211 and a second connecting pipe 212. The flash tank 10, the first connecting pipe 211, the steam-water separator 40, the second connecting pipe 212, and the compressor 30 are connected in sequence.

[0036] In other words, by setting up the steam-water separator 40, the steam generated from the flash tank 10 can be further separated into steam and water, ensuring that the steam after passing through the steam-water separator 40 is completely gaseous and enters the compressor 30 through the second connecting pipe 212, thereby ensuring the normal operation of the compressor 30, improving the pressurization effect of the steam, and also extending the service life of the compressor 30.

[0037] In order to regulate the intake air flow rate into the compressor 30, in this embodiment, the high-pressure condensate recovery system 100 further includes an intake regulating valve 51, which is disposed on the second connecting pipe 212. Through the intake regulating valve 51, the steam flow rate entering the compressor 30 can be reasonably controlled according to the actual flash evaporation, steam pressurization, and subsequent heat exchange effect, thereby improving the subsequent flash evaporation effect and increasing the recovery and utilization rate of high-pressure condensate.

[0038] like Figure 1As shown, in this embodiment, the steam-water separator 40 is located above the flash tank 10, and the first connecting pipe 211 is connected to the top of the flash tank 10. After the high-pressure condensate enters the flash tank 10, it releases flash steam when the pressure decreases, thus separating the high-temperature, high-pressure condensate into liquid and steam. The denser condensate flows into the bottom of the flash tank 10, while the less dense secondary steam flows out from the top opening of the flash tank 10. Therefore, by placing the steam-water separator 40 above the flash tank 10 and connecting the first connecting pipe 211 to the top of the flash tank 10, this embodiment facilitates the collection and transportation of less dense steam. The steam-water separator 40 then performs further steam-water separation, improving the efficiency of steam transportation and reducing energy waste during transportation, thereby further saving energy consumption.

[0039] Combination Figure 1 Furthermore, the high-pressure condensate recovery system 100 also includes a heat exchanger 60 and an output pipe 71. The heat exchanger 60 is installed inside the flash tank 10, and the compressor 30, the second delivery pipe 22, the heat exchanger 60 and the output pipe 71 are connected in sequence. The heat exchanger 60 is used to exchange heat with the high-pressure condensate inside the flash tank 10.

[0040] As is easily understood, the high-pressure steam after being pressurized by the compressor 30 enters the heat exchanger 60 through the second delivery pipe 22. Then, the heat exchanger 60 exchanges heat with the high-pressure condensate in the flash tank 10 (indirect heat exchange), which can improve the flash evaporation effect. Then, the high-pressure steam can be directly output through the output pipe 71 and used in downstream processes, thereby improving the overall recycling efficiency of the system and saving energy.

[0041] Furthermore, the high-pressure condensate recovery system 100 also includes a third conveying pipe 23, with both ends of the third conveying pipe 23 connected to the second conveying pipe 22 and the flash tank 10, respectively. That is, after being pressurized by the compressor 30, part of the high-pressure steam enters the heat exchanger 60 through the second conveying pipe 22 for indirect heat exchange; while the other part of the high-pressure steam enters the flash tank 10 through the third conveying pipe 23 for direct heat exchange, i.e., directly mixing and exchanging heat with the high-pressure condensate in the flash tank 10. This further improves the flashing efficiency, thereby increasing the recovery and utilization rate of the high-pressure condensate, saving energy and reducing costs.

[0042] It should be noted that the third conveying pipe 23 can be understood as a return pipe. That is, a small portion of the high-pressure steam in the third conveying pipe 23 can be directly returned to the flash tank 10 through the third conveying pipe 23, thereby forming a circulation pipeline system with the flash tank 10, the first connecting pipe 211, the steam-water separator 40, the second connecting pipe 212, and the compressor 30.

[0043] Therefore, in order to adjust the high-pressure steam reflux flow rate of the reflux pipe to better match the high-pressure steam flow rate of the second delivery pipe 22 and improve the flash evaporation effect, in this embodiment, the high-pressure condensate recovery system 100 also includes a reflux valve 52, which is disposed on the third delivery pipe 23.

[0044] Optionally, in this embodiment, the heat exchanger 60 is located at the bottom of the flash tank 10. Since the high-pressure condensate releases flash steam (secondary steam) when its pressure decreases after entering the flash tank 10, the flash tank 10 separates the high-temperature, high-pressure condensate into vapor and liquid components, allowing the denser condensate to flow to the bottom of the flash tank 10. Therefore, by placing the heat exchanger 60 at the bottom of the flash tank 10, it can better exchange heat with the denser condensate, thereby improving the flash evaporation effect of the denser condensate and increasing the recovery rate of the high-pressure condensate.

[0045] like Figure 1 As shown, the output pipe 71 extends from the top of the flash tank 10, which can better adapt to the flow direction of high-pressure steam and facilitate connection with other downstream process equipment.

[0046] To further improve the heat exchange and flash evaporation effect, in this embodiment, the output pipe 71 and the second delivery pipe 22 are respectively connected to the opposite sides of the heat exchanger 60. This increases the flow path of high-pressure steam in the heat exchanger 60, thereby improving the heat exchange effect with the high-pressure condenser in the flash tank 10, and thus improving the flash evaporation effect and the recycling rate.

[0047] In addition, in order to facilitate the input of high-pressure condensate generated during the manufacturing process into the flash tank 10, the high-pressure condensate recovery system 100 provided in this embodiment also includes an input pipe 72, which is connected to the flash tank 10.

[0048] Similarly, in order to increase the steam flow path and improve the circulation heat exchange effect, the inlet pipe 72 and the third delivery pipe 23 are respectively connected to the two opposite sides of the flash tank 10.

[0049] In summary, the embodiments of this utility model provide a high-pressure condensate recovery system 100, which includes a flash tank 10, a first conveying pipe 21, a compressor 30, and a second conveying pipe 22, all connected sequentially. The flash steam generated after the high-pressure condensate passes through the flash tank 10 is conveyed to the compressor 30 via the first conveying pipe 21 for pressurization. The pressurized high-temperature, high-pressure steam then re-enters the flash tank 10 via the second conveying pipe 22 to exchange heat with the high-pressure condensate inside, thereby improving the flash evaporation effect and generating more flash steam. The high-pressure steam after heat exchange can be directly supplied to downstream processes without the need for long conveying pipelines and multiple heat exchange devices, thus improving the high-pressure condensate recovery rate, reducing the overall system's energy consumption and construction costs, and meeting the high-pressure steam requirements of relevant industries.

[0050] The above description is merely a specific embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-pressure condensate recovery system, characterized in that, It includes a flash tank (10), a first delivery pipe (21), a compressor (30), and a second delivery pipe (22); The flash tank (10), the first delivery pipe (21), the compressor (30), and the second delivery pipe (22) are connected end to end in sequence.

2. The high-pressure condensate recovery system according to claim 1, characterized in that, The high-pressure condensate recovery system (100) also includes a steam-water separator (40), the first delivery pipe (21) includes a first connecting pipe (211) and a second connecting pipe (212), and the flash tank (10), the first connecting pipe (211), the steam-water separator (40), the second connecting pipe (212) and the compressor (30) are connected in sequence.

3. The high-pressure condensate recovery system according to claim 2, characterized in that, The high-pressure condensate recovery system (100) also includes an intake regulating valve (51), which is disposed on the second connecting pipe (212).

4. The high-pressure condensate recovery system according to claim 2, characterized in that, The steam-water separator (40) is located above the flash tank (10), and the first connecting pipe (211) is connected to the top of the flash tank (10).

5. The high-pressure condensate recovery system according to claim 1, characterized in that, The high-pressure condensate recovery system (100) also includes a heat exchanger (60) and an output pipe (71). The heat exchanger (60) is located inside the flash tank (10). The compressor (30), the second delivery pipe (22), the heat exchanger (60) and the output pipe (71) are connected in sequence. The heat exchanger (60) is used to exchange heat with the high-pressure condensate in the flash tank (10).

6. The high-pressure condensate recovery system according to claim 5, characterized in that, The high-pressure condensate recovery system (100) also includes a third delivery pipe (23), the two ends of which are connected to the second delivery pipe (22) and the flash tank (10), respectively.

7. The high-pressure condensate recovery system according to claim 6, characterized in that, The high-pressure condensate recovery system (100) also includes a reflux valve (52), which is located on the third delivery pipe (23).

8. The high-pressure condensate recovery system according to claim 5, characterized in that, The heat exchanger (60) is located at the bottom of the flash tank (10).

9. The high-pressure condensate recovery system according to claim 5, characterized in that, The output pipe (71) and the second delivery pipe (22) are respectively connected to the two sides opposite to the heat exchanger (60).

10. The high-pressure condensate recovery system according to any one of claims 1-9, characterized in that, The high-pressure condensate recovery system (100) also includes an input pipe (72) which is connected to the flash tank (10).

Images