Drainage system for a steam drum

Abstract

The present disclosure relates to a kind of steam pocket blowdown systems, including medium-pressure steam pocket, steam pocket fixed discharge flash tank and gas-liquid separation device, wherein, medium-pressure steam pocket is communicated with water cooling wall coil in gasifier, the liquid inlet of steam pocket fixed discharge flash tank is communicated with medium-pressure steam pocket, the fluid in medium-pressure steam pocket enters steam pocket fixed discharge flash tank and loses pressure, and the light component in fluid vaporizes and is discharged into gas-liquid separation device through exhaust port, the heavy component that is not vaporized in liquid is discharged through liquid outlet, and liquid outlet is arranged in the lower portion of steam pocket fixed discharge flash tank;Tank body of gas-liquid separation device is provided with multiple first baffles extending downward from the top of tank body, and first baffles are arranged at intervals.The present disclosure utilizes steam pocket fixed discharge flash tank to receive the intermittent blowdown of medium-pressure steam pocket, thereby effectively controlling steam pocket liquid level and treating the impurities discharged, and through gas-liquid separation device, it can prevent steam pocket fixed discharge flash tank from forming ice hanging due to gas water during winter exhaust, and bring potential safety hazard to production operation.

Description

Technical Field

[0001] This disclosure relates to the field of coal chemical technology, specifically to a steam drum sewage discharge system. Background Technology

[0002] Pressurized coal gasification technology involves transporting pulverized coal, the reactant, through high-pressure carbon dioxide (or nitrogen) to a pulverized coal burner and then injecting it at high speed into the furnace of a gasifier. There, it undergoes a rapid gasification reaction with a gasifying agent (pure oxygen and a small amount of steam) under high temperature and pressure. The resulting syngas, primarily composed of CO and H2, is washed and dust-removed before being sent to the shift conversion unit. To ensure the safe conduct of the gasification reaction and to fully utilize the heat generated, the gasifier is typically equipped with water-cooled wall coils to absorb the heat and stabilize the reaction temperature. A steam drum is usually installed after the water-cooled wall coils to deliver the saturated steam generated after absorbing the reaction heat into the plant's steam network for utilization. In existing technologies, after prolonged use, impurities easily accumulate inside the steam drum, forming scale, which corrodes the drum and affects its service life. Utility Model Content

[0003] In order to solve the problems existing in the prior art, this disclosure provides the following technical solution: A steam drum sewage discharge system, comprising: The intermediate-pressure steam drum is configured to be connected to the water-cooled wall coils inside the gasifier, and the fluid in the water-cooled wall coils is configured to flow into the intermediate-pressure steam drum for gas-liquid separation. A steam drum flash tank with constant pressure and exhaust is provided with a liquid inlet, a liquid outlet, and an exhaust port. The liquid inlet is connected to a medium-pressure steam drum. The pressurized fluid in the medium-pressure steam drum is configured such that after depressurization in the flash tank, the light components in the fluid vaporize and are discharged through the exhaust port, while the unvaporized heavy components in the liquid are discharged through the liquid outlet. The liquid outlet is located at the lower part of the flash tank. A gas-liquid separation device includes a tank arranged laterally, and a plurality of first baffles are provided in the tank. The first baffles are configured to extend downward from the top of the tank and are spaced apart in the tank. The inlet of the gas-liquid separation device is configured to communicate with the exhaust port of the steam drum constant discharge flash tank.

[0004] In one embodiment of this disclosure, the gas-liquid separation device is further provided with a vent and a drain. The drain is located at the bottom of the gas-liquid separation device and is used to discharge the separated water. The vent is connected to a vent pipeline and is used to discharge the separated gas.

[0005] In one embodiment of this disclosure, the first baffle is configured to be in contact with the top and sidewall of the tank, and there is a first predetermined distance between the bottom of the first baffle and the bottom of the tank, so that the gas entering the tank flows laterally after bypassing the first baffle in the tank.

[0006] In one embodiment of this disclosure, a second baffle is further provided inside the tank. The second baffle is arranged parallel to the first baffle and is configured to connect with the side wall of the tank. There is a second predetermined distance between the top of the second baffle and the top of the tank, and a third predetermined distance between the bottom of the second baffle and the bottom of the tank.

[0007] In one embodiment of this disclosure, the first predetermined distance is greater than the second predetermined distance.

[0008] In one embodiment of this disclosure, the second baffle is configured to be positioned near the entrance relative to the first baffle.

[0009] In one embodiment of this disclosure, the spacing between adjacent baffles is 40 cm.

[0010] In one embodiment of this disclosure, the interior of the tank is filled with a plurality of metal corrugated rings, each metal corrugated ring having an annular body, and a plurality of arc-shaped metal sheets are spaced apart on the inner wall of the annular body, the metal sheets being configured to extend from the inner wall of the annular body toward the center of the circle; and an opening is provided on the side wall of the annular body.

[0011] In one embodiment of this disclosure, the opening is located on the sidewall of the annular body between two adjacent metal sheets.

[0012] In one embodiment of this disclosure, the gas-liquid separation device is made of carbon steel.

[0013] The steam drum blowdown system disclosed herein receives intermittent blowdown from the medium-pressure steam drum by setting up a steam drum fixed-blowdown flash tank, thereby effectively controlling the steam drum liquid level and treating the discharged impurities. By setting a horizontal gas-liquid separator at the exhaust port of the steam drum fixed-blowdown flash tank to extend the separation path, and by setting multiple first baffles at intervals in the gas-liquid separator to improve the gas-liquid separation effect, the discharged gas no longer carries water, thus solving the safety hazard caused by condensate being carried out with the gas during the steam drum blowdown process.

[0014] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0016] Figure 1 This is a schematic diagram of the structure of a steam drum sewage discharge system provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of a gas-liquid separation device provided in an embodiment of this disclosure; Figure 3 This is a cross-sectional view along the AA direction of a gas-liquid separation device provided in an embodiment of this disclosure; Figure 4 This is a cross-sectional view along the BB direction of a gas-liquid separation device provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of a metal corrugated ring provided in an embodiment of the present disclosure.

[0017] Figures 1 to 5 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows: 1. Gasifier; 2. Medium-pressure steam drum; 3. Steam drum flash tank; 31. Liquid inlet; 32. Liquid outlet; 33. Exhaust outlet; 4. Gas-liquid separator; 41. Tank body; 42. First baffle; 421. First predetermined distance; 43. Inlet; 44. Vent; 45. Drain outlet; 46. Second baffle; 461. Second predetermined distance; 462. Third predetermined distance; 5. Corrugated metal ring; 51. Annular body; 52. Metal sheet; 53. Opening. Detailed Implementation

[0018] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0019] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0020] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0021] 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 discussed further in subsequent figures.

[0022] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0023] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0024] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0025] This disclosure provides a steam drum blowdown system, mainly applied in the field of pulverized coal pressurized gasification technology. The steam drum blowdown system includes a medium-pressure steam drum 2, a steam drum fixed-discharge flash tank 3, and a gas-liquid separator 4.

[0026] Pressurized coal gasification technology involves transporting pulverized coal, the raw material, to a pulverized coal burner via high-pressure carbon dioxide (or nitrogen) and then injecting it at high speed into the furnace of gasifier 1. There, the pulverized coal reacts instantly with the gasifying agent (pure oxygen and a small amount of water vapor) under high temperature and pressure.

[0027] To ensure the safe conduct of the gasification reaction and to fully utilize the heat generated, water-cooled wall coils are installed on the inner wall of the gasifier 1 to absorb excess heat. The condensate flowing out of the water-cooled wall coils partially vaporizes after absorbing the heat of the reaction, and flows into the medium-pressure steam drum 2 along with the remaining condensate for further treatment.

[0028] When the gas-liquid mixture in the water-cooled wall coil enters the intermediate-pressure steam drum 2, it passes through the separation device in the intermediate-pressure steam drum 2. The qualified steam rises to the space area at the top of the intermediate-pressure steam drum 2 and is sent into the steam pipeline network for use. The separated liquid flows back to the lower part of the intermediate-pressure steam drum 2. Since the separated liquid contains dissolved phosphates and other impurities, these impurities will gradually accumulate inside the intermediate-pressure steam drum 2. If they are not discharged in time, they will form scale inside the intermediate-pressure steam drum 2 and cause corrosion to the intermediate-pressure steam drum 2. Therefore, this disclosure sets up a steam drum drainage system after the intermediate-pressure steam drum 2 to treat the impurities generated by the periodic drainage of the intermediate-pressure steam drum 2.

[0029] Reference Figures 1 to 4The steam drum blowdown system provided in this disclosure includes a medium-pressure steam drum 2, a steam drum fixed-discharge flash tank 3, and a gas-liquid separator 4 connected in sequence. The medium-pressure steam drum 2 is connected to the water-cooled wall coils in the gasifier 1 to receive condensate flowing out of the water-cooled wall coils. The condensate includes high-pressure steam vaporized after absorbing the heat of reaction and unvaporized condensate. After gas-liquid separation in the medium-pressure steam drum 2, the produced saturated steam is sent into the steam pipeline network for utilization, while the remaining condensate remains in the medium-pressure steam drum 2. To prevent the medium-pressure steam drum 2 from becoming too hot or accumulating impurities, the system is designed to prevent this. This process, which affects the overall system, connects the inlet 31 of the medium-pressure steam drum 2 to the inlet 31 of the steam drum flash tank 3. The steam drum flash tank 3 is used to treat the excess fluid discharged from the medium-pressure steam drum 2. Since the pressure inside the medium-pressure steam drum 2 is greater than that inside the steam drum flash tank 3, when the pressurized fluid in the medium-pressure steam drum 2 loses pressure after entering the steam drum flash tank 3, the light components in the fluid vaporize and are discharged into the gas-liquid separator 4 through the exhaust port 33. The unvaporized heavy components in the fluid are discharged through the drain port 32, which is located at the bottom of the steam drum flash tank 3.

[0030] Furthermore, to facilitate the entry of gas into the gas-liquid separator 4 through the exhaust port 33 at the top, the exhaust port 33 is positioned above the steam drum flash tank 3. This prevents the separated gas from contacting other liquids again, thus avoiding affecting the separation effect. The tank body 41 of the gas-liquid separator 4 is arranged laterally to extend the gas-liquid separation path. Multiple first baffles 42 extending downwards from the top of the tank body 41 are provided inside the tank body 41, spaced apart. Since the gas entering the tank body 41 also carries some liquid, the flow direction of the gas and liquid is changed by setting the first baffles 42 in the gas flow path. When the fluid impacts the first baffle 42, the lighter gas can bypass the first baffle 42 and continue to move laterally, while the heavier liquid moves downwards along the first baffle 42 and enters the bottom of the tank body 41. To fully remove residual liquid from the fluid, multiple first baffles 42 are spaced apart inside the tank body 41 to repeat the above separation process. Therefore, the gas discharged from the gas-liquid separator 4 contains almost no moisture, thus effectively solving the problem of moisture being carried out with the gas. In winter, when exhausting gas, ice will not form in the factory area, which would pose a safety hazard to production operations.

[0031] refer to Figure 2 In one embodiment of this disclosure, the gas-liquid separation device 4 is further provided with a vent 44 and a drain 45. The drain 45 is located at the bottom of the gas-liquid separation device 4 and is used to discharge the separated water. The vent 44 is connected to a vent pipeline and is used to discharge the separated gas.

[0032] Specifically, the gas-liquid separator 4 has its drain outlet 45 located at the bottom of the tank 41. It effectively discharges the separated water using gravity. When the gas-liquid separator 4 is started, the fluid flowing into it comes into contact with the first baffle 42. The lighter gas can bypass the first baffle 42 and flow laterally inside the tank 41, thus entering the venting pipeline through the vent outlet 44 and being discharged to a safe location in the factory area through the venting pipeline. The heavier liquid will collide with the first baffle 42 and flow into the bottom of the tank 41 under the action of gravity. Although the horizontal arrangement of the tank 41 extends the flow path of the fluid and improves the gas-liquid separation effect, if the liquid cannot be discharged in time, a water hammer effect will occur. That is, when the gas flow channel inside the tank 41 is blocked by liquid, the flow velocity of the fluid inside the tank 41 will change rapidly, generating pressure fluctuations inside the tank 41. These pressure fluctuations are often very violent and can cause the entire tank 41 to vibrate or rupture. Therefore, in order to discharge the liquid in the tank 41 in a timely manner and avoid the occurrence of water hammer effect, a drain outlet 45 is provided at the bottom of the tank 41 and connected to the trench.

[0033] refer to Figure 2 and Figure 3 In one embodiment of this disclosure, the first baffle 42 is configured to be in contact with the top and side wall of the tank 41, and there is a first predetermined distance 421 between the bottom of the first baffle 42 and the bottom of the tank 41. Gas entering the tank 41 flows laterally after bypassing the first baffle 42 inside the tank 41.

[0034] Specifically, to improve the separation efficiency of the gas-liquid separator 4, multiple first baffles 42 are installed inside the tank 41. The first baffles 42 are connected to the top and side walls of the tank 41, and a first predetermined distance 421 is left between the bottom of the first baffle 42 and the bottom of the tank 41, serving as a fluid passage. The presence of the first baffles 42 forces the gas-liquid mixture entering the tank 41 to change its flow direction upon encountering the baffles. Due to the higher density and inertia of the liquid, it is easier to impact the baffles and separate from the gas; while the gas is more likely to bypass the first baffles 42 and continue along the new flow path. Furthermore, by setting the first baffles 42 and leaving an appropriate bottom passage, the residence time of the fluid in the tank 41 and the contact area between the gas and liquid phases are increased, providing more opportunities for small droplets to aggregate and settle, thereby further improving the separation efficiency.

[0035] refer to Figure 2 and Figure 4In one embodiment of this disclosure, a second baffle 46 is further provided inside the tank 41. The second baffle 46 is arranged parallel to the first baffle 42 and is configured to be in contact with the side wall of the tank 41. There is a second predetermined distance 461 between the top of the second baffle 46 and the top of the tank 41, and there is a third predetermined distance 462 between the bottom of the second baffle 46 and the bottom of the tank 41.

[0036] Specifically, to further improve the separation effect of the gas-liquid separator 4, in addition to multiple first baffles 42, a second baffle 46 is also provided inside the tank 41. The second baffle 46 is arranged parallel to the first baffles 42 to increase the collision area with the fluid, ensuring that the second baffle 46 can efficiently perform gas-liquid separation. The purpose of the second baffle 46 is to maximize the impact of the initial fluid flow, thereby separating most of the liquid from the gas and reducing the burden on the subsequent first baffles 42. Therefore, when the second baffle 46 is installed, it is fixedly connected to the side wall of the tank 41. A second predetermined distance 461 is left between the top of the second baffle 46 and the top of the tank 41, and a third predetermined distance 462 is left between the bottom of the second baffle 46 and the bottom of the tank 41. This design creates two channels, one above the other, between the second baffle 46 and the tank 41. The upper predetermined distance 461 allows lighter gases to pass through, while the lower predetermined distance 462 allows heavier liquids to flow down. This effectively separates the gas and liquid phases, reducing mutual interference and optimizing the fluid flow path to improve separation efficiency. Furthermore, this layout alters the flow direction of the different fluids, increasing the residence time of the gas-liquid mixture within the separator and the opportunity for droplets to collide with the baffle surface and other droplets, promoting the aggregation of small droplets into larger droplets and their settling. Simultaneously, the two channels also facilitate cleaning and maintenance inside the tank 41.

[0037] refer to Figures 2 to 4 In one embodiment of this disclosure, the first predetermined distance 421 is greater than the second predetermined distance 461.

[0038] Specifically, in practical applications, the first predetermined distance 421 is preferably 30cm, and the second predetermined distance 461 and the third predetermined distance 462 are equal, preferably 20cm. The 20cm top second predetermined distance 461 is sufficient to allow lighter gases to pass smoothly, while effectively slowing down the airflow velocity, giving small droplets more opportunities to settle and reducing the possibility of carrying tiny droplets. The bottom third predetermined distance 462 is the same size as the second predetermined distance 461, ensuring that the liquid can flow smoothly to the bottom of the tank, avoiding the secondary entrainment problem caused by liquid accumulation near the second baffle 46, so that the liquid can be quickly and effectively separated from the airflow and collected at the bottom of the tank. Compared with the second predetermined distance 461, the larger first predetermined distance 421 provides a buffer zone for the airflow, which helps to smooth the airflow, thereby facilitating the formation of a more uniform and stable flow field distribution and further enhancing the separation effect.

[0039] refer to Figure 2 In one embodiment of this disclosure, the second baffle 46 is configured to be positioned near the inlet 43 relative to the first baffle 42.

[0040] Specifically, the second baffle 46 is positioned near the inlet 43 relative to the first baffle 42. This allows for initial dispersion and buffering of the fluid as it enters the gas-liquid separator 4, effectively reducing the direct impact of high-speed airflow on the internal structure, minimizing the risk of equipment wear, and helping to control the flow direction of the gas-liquid mixture, preventing the formation of local eddies, and ensuring a more uniform and stable flow field throughout the separation process. Secondly, positioning the second baffle 46 near the inlet 43 allows for immediate capture of larger droplets, causing them to settle rapidly to the bottom of the tank, reducing the workload of the first baffle 42 and improving overall separation efficiency. It also increases the contact area and time between the gas and liquid phases, promoting the aggregation of small droplets into larger ones. Furthermore, the strategic placement of the second baffle 46 effectively prevents some airflow from reaching the outlet directly from the inlet 43 without sufficient separation, ensuring that all fluid must follow a specific path to leave the gas-liquid separator 4, thereby further enhancing the separation effect.

[0041] refer to Figure 2 In one embodiment of this disclosure, the spacing between adjacent baffles is 40cm.

[0042] Specifically, multiple first baffles 42 are spaced apart within the tank 41, with a spacing of 40cm between them. Second baffles 46 are positioned relative to the first baffles 42 near the inlet 43, also spaced apart from adjacent first baffles 42, with a spacing of 40cm. By setting the horizontal spacing between adjacent baffles to 40cm, smooth gas flow is ensured while preventing liquid from being carried away by the high-speed airflow. This design helps extend the residence time of the liquid within the separator, thereby improving separation efficiency. If the baffle spacing is too small, the airflow may not diffuse sufficiently, forming localized eddies or short-circuit flows; if the spacing is too large, the guiding effect of the baffles may be reduced. Furthermore, an excessively large baffle spacing leads to an increased volume of the gas-liquid separator 4, increasing manufacturing costs and floor space; an excessively small spacing may result in decreased separation efficiency or increased risk of blockage. The 40cm spacing balances separation efficiency with the compactness and economy of the equipment.

[0043] refer to Figures 2 to 5 In one embodiment of this disclosure, the interior of the tank 41 is filled with a plurality of metal corrugated rings 5, each metal corrugated ring 5 having an annular body 51, and a plurality of arc-shaped metal sheets 52 are spaced apart on the inner wall of the annular body 51. The metal sheets 52 are configured to extend from the inner wall of the annular body 51 toward the center of the circle. An opening 53 is provided on the side wall of the annular body 51.

[0044] Specifically, to further improve the separation effect of the gas-liquid separator 4, multiple metal corrugated rings 5 ​​are filled inside the tank 41 of the gas-liquid separator 4. Each metal corrugated ring 5 has an annular body 51, on which multiple arc-shaped metal sheets 52 are spaced apart. These metal sheets 52 are configured to extend from the inner wall of the annular body 51 towards its center. The design of the metal sheets 52 not only gives the metal corrugated ring 5 sufficient mechanical strength, but also changes the flow direction of the fluid when the mixed gas and liquid enter the metal corrugated ring 5. This is more conducive to the separation of small droplets from the main fluid and promotes their collision and aggregation, thereby forming larger droplets that are easier to settle. This not only improves the separation efficiency, but also ensures that the gas is discharged from the system more purely. Furthermore, openings 53 are provided on the annular sidewall. These openings 53 provide a flow path for the main fluid and allow droplets to pass through. It can be seen that filling the tank 41 with metal corrugated rings 5 ​​not only increases the contact area when the fluid passes through, but also effectively changes the flow path of the fluid, making the gas-liquid separation process more efficient.

[0045] refer to Figure 5 In one embodiment of this disclosure, the opening 53 is located on the side wall of the annular body 51 at a position corresponding to two adjacent metal pieces 52.

[0046] Specifically, an opening 53 is provided on the side wall of the annular body 51, and the opening 53 is located between two adjacent metal plates 52 on the side wall of the annular body 51. This allows the fluid to not only move along the main flow direction, but also to move laterally through the opening 53, increasing the interaction between fluids flowing in different directions, increasing the gas-liquid contact area, and thus enhancing the separation effect. At the same time, the opening 53 can also increase the chance of droplets contacting the metal plates 52 by changing the fluid movement trajectory. Especially for small droplets that are difficult to capture due to their low inertia, the opening 53 designed between the two metal plates 52 increases the probability of their capture, thereby further improving the separation efficiency of the gas-liquid separation device 4.

[0047] refer to Figure 2 In one embodiment of this disclosure, the gas-liquid separation device 4 is made of carbon steel.

[0048] Specifically, carbon steel possesses high mechanical strength, enabling the gas-liquid separator 4 to maintain structural stability and safety during operation. Furthermore, it offers excellent cost-effectiveness; compared to stainless steel or other alloy materials, using carbon steel reduces initial investment costs without sacrificing equipment performance. Secondly, carbon steel is easy to cut, weld, and shape, and this excellent machinability also makes maintenance and repair more convenient.

[0049] The steam drum blowdown system disclosed herein receives intermittent blowdown from the intermediate-pressure steam drum by setting up a steam drum fixed-discharge flash tank, thereby effectively controlling the liquid level in the intermediate-pressure steam drum and treating the discharged impurities. This prevents corrosion of the intermediate-pressure steam drum caused by the accumulation of impurities. By setting a horizontal gas-liquid separator at the exhaust port of the steam drum fixed-discharge flash tank to extend the separation path, and by setting multiple first and second baffles at intervals in the gas-liquid separator to improve the gas-liquid separation effect, the discharged gas no longer carries water, thus solving the safety hazard caused by condensate being carried out with the gas during the steam drum blowdown process.

[0050] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A steam drum sewage discharge system, characterized in that, include: Medium-pressure steam drum (2), which is configured to communicate with the water-cooled wall coil in the gasifier (1), wherein the fluid in the water-cooled wall coil is configured to flow into the medium-pressure steam drum (2) for gas-liquid separation; A steam drum flash tank (3) is provided with an inlet (31), a outlet (32) and an exhaust port (33). The inlet (31) is connected to the medium-pressure steam drum (2). The pressurized fluid in the medium-pressure steam drum (2) is configured such that after entering the steam drum flash tank (3) and losing pressure, the light components in the fluid vaporize and are discharged through the exhaust port (33), and the unvaporized heavy components in the liquid are discharged through the outlet (32). The outlet (32) is located at the lower part of the steam drum flash tank (3). A gas-liquid separation device (4) includes a tank (41) arranged laterally, and a plurality of first baffles (42) are provided in the tank (41). The first baffles (42) are configured to extend downward from the top of the tank (41) and are spaced apart in the tank (41). The inlet (43) of the gas-liquid separation device (4) is configured to communicate with the exhaust port (33) of the steam drum constant discharge flash tank (3).

2. The steam drum sewage discharge system as described in claim 1, characterized in that, The gas-liquid separator (4) is also provided with a vent (44) and a drain (45). The drain (45) is located at the bottom of the gas-liquid separator (4) and is used to discharge the separated water. The vent (44) is connected to the vent pipeline and is used to discharge the separated gas.

3. The steam drum sewage discharge system as described in claim 1, characterized in that, The first baffle (42) is configured to be in contact with the top and side wall of the tank (41), and there is a first predetermined distance (421) between the bottom of the first baffle (42) and the bottom of the tank (41). Gas entering the tank (41) flows laterally after bypassing the first baffle (42) in the tank (41).

4. The steam drum sewage discharge system as described in claim 3, characterized in that, A second baffle (46) is also provided inside the tank (41). The second baffle (46) is arranged parallel to the first baffle (42), and the second baffle (46) is configured to be in contact with the side wall of the tank (41). There is a second predetermined distance (461) between the top of the second baffle (46) and the top of the tank (41), and there is a third predetermined distance (462) between the bottom of the second baffle (46) and the bottom of the tank (41).

5. The steam drum sewage discharge system as described in claim 4, characterized in that, The first predetermined distance (421) is greater than the second predetermined distance (461).

6. The steam drum sewage discharge system as described in claim 5, characterized in that, The second baffle (46) is configured to be positioned near the entrance (43) relative to the first baffle (42).

7. The steam drum sewage discharge system as described in claim 1, characterized in that, The distance between adjacent baffles is 40cm.

8. The steam drum sewage discharge system as described in claim 1, characterized in that, The tank (41) is filled with a plurality of metal corrugated rings (5), each metal corrugated ring (5) having an annular body (51), and a plurality of arc-shaped metal pieces (52) are spaced apart on the inner wall of the annular body (51). The metal pieces (52) are configured to extend from the inner wall of the annular body (51) toward the center of the circle. An opening (53) is provided on the side wall of the annular body (51).

9. The steam drum sewage discharge system as described in claim 8, characterized in that, The opening (53) is located on the side wall of the annular body (51) between two adjacent metal pieces (52).

10. The steam drum sewage discharge system as described in claim 1, characterized in that, The gas-liquid separation device (4) is made of carbon steel.

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