Dirty steam pretreatment device

Abstract

The utility model belongs to the technical field of biodiesel production and processing equipment, disclose a kind of foul steam pretreatment device. The foul steam pretreatment device includes primary condensing section, secondary condensing section and steam-water separation section. Primary condensing section includes first heat exchange cavity and first heat exchange tube, and first heat exchange tube is located in first heat exchange cavity, and first heat exchange cavity can be passed into first cooling medium. Secondary condensing section includes second heat exchange cavity and second heat exchange tube, and second heat exchange tube is located in second heat exchange cavity, and second heat exchange cavity can be passed into second cooling medium. Steam-water separation section includes separation cavity and separation component, and separation component is located in separation cavity, and the top of separation cavity is respectively equipped with first opening and second opening, and bottom is equipped with water removal port, and the bottom end of first heat exchange tube and the bottom end of second heat exchange tube are respectively communicated with first opening and second opening. The foul steam pretreatment device deodorization pretreatment effect is good, and wastewater quantity is low and energy consumption is low.

Description

Technical Field

[0001] This utility model relates to the technical field of biodiesel production and processing equipment, and in particular to a waste steam pretreatment device. Background Technology

[0002] Biodiesel is a clean alternative fuel that can be used in compression-ignition engines, produced from renewable biomass resources (such as waste oils or microbial oils) through specific chemical processes (mainly transesterification). However, the actual production process of biodiesel generates a large amount of polluting high-temperature steam (hereinafter referred to as "waste steam") containing organic compounds, fatty acids, alcohols, and other odor-causing substances. This high-temperature steam needs to be deodorized before being released.

[0003] The traditional approach involves cooling the wastewater vapor before directly introducing it into the deodorization system. The vapor is then cleaned to remove organic matter within the system, dried, and finally passed into the deodorization tower for further odor removal. However, this method generates a large amount of wastewater during the cleaning phase, and the subsequent drying process is energy-intensive.

[0004] Therefore, there is an urgent need to develop a wastewater steam pretreatment device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a wastewater pretreatment device that can pretreat wastewater by deodorizing it, and the treatment effect is good, thereby reducing the amount of wastewater and energy consumption in the deodorization process.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Wastewater steam pretreatment unit, including:

[0008] A primary condensation section, comprising a first heat exchange cavity and a first heat exchange tube, wherein the first heat exchange tube is located within the first heat exchange cavity and a first cooling medium can be introduced into the first heat exchange cavity.

[0009] A secondary condensation section, comprising a second heat exchange chamber and a second heat exchange tube, wherein the second heat exchange tube is located within the second heat exchange chamber and a second cooling medium can be introduced into the second heat exchange chamber.

[0010] A steam-water separation section is located at the bottom of the primary condensation section and the secondary condensation section. The steam-water separation section includes a separation chamber and a separation component. The separation component is located in the separation chamber. The top of the separation chamber is provided with a first opening and a second opening, and the bottom is provided with a water removal port. The bottom ends of the first heat exchange tube and the second heat exchange tube are respectively connected to the first opening and the second opening.

[0011] The waste steam to be treated can exchange heat with the first cooling medium in the first heat exchange tube to form a gas-liquid mixture consisting of primary condensate and primary condensate. The gas-liquid mixture can collide with the separation component in the separation chamber to separate the primary condensate and the primary condensate. The separated primary condensate can exchange heat with the second cooling medium in the second heat exchange tube to form secondary condensate and secondary condensate. Both the primary and secondary condensate can be discharged from the water removal port, and the secondary condensate can be discharged from the top of the second heat exchange tube.

[0012] As an optional technical solution for the wastewater pretreatment device, the wastewater pretreatment device further includes a storage section, which is located at the top of the primary condensation section and the secondary condensation section. The storage section includes a first accommodating cavity and a second accommodating cavity that are not connected. The first accommodating cavity is provided with an air inlet, and the air inlet, the first accommodating cavity, and the top end of the first heat exchange tube are connected in sequence. The second accommodating cavity is provided with an air outlet, and the top end of the second heat exchange tube, the second accommodating cavity, and the air outlet are connected in sequence.

[0013] As an optional technical solution for the wastewater pretreatment device, the storage section is located in the first cylinder, and the first cylinder is provided with a first partition, which divides the interior of the first cylinder into a first accommodating cavity and a second accommodating cavity that are not connected.

[0014] As an optional technical solution for the waste steam pretreatment device, both the primary condensation section and the secondary condensation section are located in the second cylinder. The second cylinder is equipped with an insulation plate, which divides the interior of the second cylinder into a first heat exchange chamber and a second heat exchange chamber that are not connected.

[0015] As an optional technical solution for the waste steam pretreatment device, the second cylinder is provided with a first inlet, a first outlet, a second inlet and a second outlet on its side wall. The first inlet, the first heat exchange chamber and the first outlet are connected in sequence; the second inlet, the second heat exchange chamber and the second outlet are connected in sequence.

[0016] As an optional technical solution for the waste steam pretreatment device, the steam-water separation section is located in the third cylinder, the separation chamber is located inside the third cylinder, the first opening and the second opening are spaced apart at the top of the third cylinder, and the water removal port is located at the bottom of the third cylinder.

[0017] As an optional technical solution for the wastewater pretreatment device, the separation component includes multiple layers of separation baffles, all of which are fixed to the inner sidewall of the third cylinder. The multiple layers of separation baffles are spaced apart from top to bottom, and the uppermost separation baffle is positioned directly opposite the first opening.

[0018] As an optional technical solution for the wastewater pretreatment device, the separation component further includes a second partition, which is located between the first opening and the second opening and abuts against the inner wall of the separation chamber. The second partition divides the separation chamber into a first separation chamber and a second separation chamber that are connected at the bottom.

[0019] As an optional technical solution for the wastewater pretreatment device, the side wall of the third cylinder is provided with a first hand hole and a second hand hole, which are located at the locations of the first separation chamber and the second separation chamber, respectively.

[0020] As an optional technical solution for the wastewater pretreatment device, the bottom of the third cylinder is provided with a conical sealing head, the water removal port is located at the bottom of the sealing head, and a buffer plate is provided inside the sealing head, with the buffer plate located directly above the water removal port.

[0021] The beneficial effects of this utility model are:

[0022] The waste steam pretreatment device provided by this utility model includes a primary condensation section, a secondary condensation section, and a steam-water separation section. The primary condensation section includes a first heat exchange chamber and a first heat exchange tube, the first heat exchange tube being located within the first heat exchange chamber, through which a first cooling medium can be introduced. The secondary condensation section includes a second heat exchange chamber and a second heat exchange tube, the second heat exchange tube being located within the second heat exchange chamber, through which a second cooling medium can be introduced. The steam-water separation section is located at the bottom of the primary and secondary condensation sections and includes a separation chamber and a separation assembly, the separation assembly being located within the separation chamber. In practice, the waste steam to be treated first enters the first heat exchange tube of the primary condensation section. The waste steam exchanges heat with the first cooling medium within the tube, cooling and condensing to form a gas-liquid mixture consisting of gaseous primary condensate and liquid primary condensate (e.g., condensate and organic matter), facilitating subsequent gas-liquid separation. Driven by the continuous influx of waste steam and its own gravity, the gas-liquid mixture enters the separation chamber, which expands dramatically compared to the flow channel formed by the first heat exchange tube. There, it collides with the separation components, causing the primary condensate and primary condensate to separate. The gases are separated. The primary condensate falls to the bottom of the separation chamber under its own gravity and is discharged through the water removal port, while the primary condensate rises into the second heat exchange tube of the secondary condensation section. The secondary condensate then continues to exchange heat with the second cooling medium within the second heat exchange tube. After cooling down again, the secondary condensate condenses to form a secondary condensate (e.g., condensate water and organic matter) and secondary condensate gas. The secondary condensate falls to the bottom of the separation chamber under its own gravity and is discharged through the water removal port, while the secondary condensate gas rises and is discharged from the top of the second heat exchange tube, proceeding to the next stage for deodorization. This wastewater steam pretreatment device can perform secondary condensation and steam-water separation of wastewater steam, removing condensate water and organic matter from the wastewater steam. This achieves deodorization pretreatment of wastewater steam with good treatment effect, thereby reducing wastewater volume and energy consumption in the deodorization process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the wastewater steam pretreatment device provided in this embodiment of the utility model.

[0024] In the picture:

[0025] 110. First heat exchange chamber; 111. First inlet; 112. First outlet; 120. First heat exchange tube; 130. Second heat exchange chamber; 131. Second inlet; 132. Second outlet; 140. Second heat exchange tube; 150. Insulation plate; 160. Baffle plate; 210. Separation chamber; 211. First hand hole; 212. Second hand hole; 213. Water outlet; 220. Separation baffle; 230. Second partition; 240. Buffer plate; 250. Sight glass; 310. First receiving chamber; 311. Air inlet; 320. Second receiving chamber; 321. Air outlet; 330. First partition. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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" and "second" are only used for distinction in description and have no special meaning.

[0030] This embodiment provides a wastewater pretreatment device that can perform deodorization pretreatment on wastewater with good treatment effect, thereby reducing the amount of wastewater and energy consumption in the deodorization process.

[0031] Specifically, such as Figure 1 As shown, the wastewater pretreatment device includes a primary condensation section, a secondary condensation section, and a steam-water separation section. The primary condensation section includes a first heat exchange chamber 110 and a first heat exchange tube 120. The first heat exchange tube 120 is located inside the first heat exchange chamber 110, and a first cooling medium can be introduced into the first heat exchange chamber 110. The secondary condensation section includes a second heat exchange chamber 130 and a second heat exchange tube 140. The second heat exchange tube 140 is located inside the second heat exchange chamber 130, and a second cooling medium can be introduced into the second heat exchange chamber 130. The steam-water separation section is located at the bottom of the primary and secondary condensation sections. The steam-water separation section includes a separation chamber 210 and a separation assembly. The separation assembly is located inside the separation chamber 210. The top of the separation chamber 210 has a first opening and a second opening, and the bottom of the separation chamber 210 has a water removal port 213. The bottom ends of the first heat exchange tube 120 and the second heat exchange tube 140 are connected to the first opening and the second opening, respectively. The waste steam to be treated can exchange heat with the first cooling medium in the first heat exchange tube 120 to form a gas-liquid mixture consisting of primary condensate and primary condensate. The gas-liquid mixture can collide with the separation component in the separation chamber 210 to separate the primary condensate and primary condensate. The separated primary condensate can exchange heat with the second cooling medium in the second heat exchange tube 140 to form secondary condensate and secondary condensate. Both primary and secondary condensate can be discharged from the water outlet 213, and secondary condensate can be discharged from the top of the second heat exchange tube 140.

[0032] Based on the above design, the first heat exchange tube 120 is located inside the first heat exchange chamber 110, through which a first cooling medium can be introduced. The waste steam can exchange heat with the first cooling medium to cool and condense, forming a mixture of gaseous primary condensate and liquid primary condensate, i.e., a gas-liquid mixture. The second heat exchange tube 140 is located inside the second heat exchange chamber 130, through which a second cooling medium can be introduced. The primary condensate can exchange heat with the second medium to cool and condense, forming secondary condensate and secondary condensate. The secondary condensate is the waste steam that has undergone final pretreatment. The gas-liquid separation section includes a separation chamber 210 and a separation component. The separation component is located inside the separation chamber 210 and performs gas-liquid separation on the gas-liquid mixture entering the separation chamber 210. The top of the separation chamber 210 is provided with a first opening and a second opening. The bottom ends of the first heat exchange tube 120 and the second heat exchange tube are respectively connected to the first opening and the second opening. The gas-liquid mixture enters the separation chamber 210 through the first opening, the primary condensate enters the second heat exchange tube 140 through the second opening, and the secondary condensate can return to the separation chamber 210 and be discharged from the water removal port 213.

[0033] In practical operation, the waste steam to be treated first enters the first heat exchange tube 120 of the primary condensation section. The waste steam exchanges heat with the first cooling medium within the tube 120, cooling and condensing to form a gas-liquid mixture consisting of gaseous primary condensate and liquid primary condensate (e.g., condensate and organic matter). This cooled gas-liquid mixture facilitates subsequent gas-liquid separation. Driven by the continuous influx of waste steam and its own gravity, the gas-liquid mixture enters the flow channel formed by the separation chamber 210, which expands abruptly compared to the flow channel formed by the first heat exchange tube 120. There, it collides with the separation components, causing the primary condensate and primary condensate to separate. The gases are separated. The primary condensate, under its own gravity, falls to the bottom of the separation chamber 210 and is discharged through the drain outlet 213. The primary condensed gas rises and enters the second heat exchange tube 140 of the secondary condensation section. Then, the secondary condensed gas continues to exchange heat with the second cooling medium within the second heat exchange tube 140. After cooling down again, the secondary condensed gas condenses to form secondary condensate (e.g., condensate and organic matter) and secondary condensed gas. The secondary condensate, under its own gravity, falls through the bottom of the second heat exchange tube 140 to the bottom of the separation chamber 210 and is discharged through the drain outlet 213. The secondary condensed gas (i.e., the treated waste steam) rises and is discharged from the top of the second heat exchange tube 140. This waste steam pretreatment device can perform secondary condensation and steam-water separation of waste steam, removing condensate and organic matter impurities from the waste steam. This achieves deodorization pretreatment of waste steam with good treatment effect, thereby reducing wastewater volume and energy consumption in the deodorization process.

[0034] It should be noted that the waste steam can be oily waste steam or waste steam containing organic matter, etc.; the first cooling medium is usually circulating water or other clean medium, and the second medium is usually chilled water or other clean medium with a temperature lower than that of the first cooling medium.

[0035] Furthermore, the inner diameter of the first heat exchange tube 120 is much smaller than the inner diameter of the separation chamber 210, which causes the gas-liquid mixture to have a sudden increase in flow channel from the heat exchange tube to the separation chamber 210, facilitating the separation of gas and liquid mixtures.

[0036] Meanwhile, both the first heat exchange tube 120 and the second heat exchange tube 140 can be thin-walled stainless steel tubes with high heat exchange efficiency, such as smooth tubes, corrugated tubes, bellows tubes, or long flat tubes. Multiple first heat exchange tubes 120 are arranged in parallel in the first heat exchange chamber 110, and multiple second heat exchange tubes 140 are arranged in parallel in the second heat exchange chamber 130.

[0037] Optionally, the waste steam pretreatment device further includes a storage section located at the top of the primary condensation section and the secondary condensation section. The storage section includes a first receiving cavity 310 and a second receiving cavity 320 that are not connected. The first receiving cavity 310 has an inlet 311, and the inlet 311, the first receiving cavity 310, and the top end of the first heat exchange tube 120 are sequentially connected. The second receiving cavity 320 has an outlet 321, and the top end of the second heat exchange tube 140, the second receiving cavity 320, and the outlet 321 are sequentially connected. Waste steam enters the first receiving cavity 310 through the inlet 311 and is stored within it. This ensures the continuity of waste steam entering the first heat exchange tube 120 and allows for sufficient condensation within the first heat exchange tube 120. Compared to the secondary condensate gas being directly discharged from the second heat exchange tube 140, storing the final secondary condensate gas in the second receiving cavity 320 prevents any primary condensate gas that has not undergone secondary condensation from escaping.

[0038] Specifically, the storage section is located in the first cylinder, and the first cylinder is provided with a first partition 330, which divides the interior of the first cylinder into a first receiving cavity 310 and a second receiving cavity 320 that are not connected. By setting the main structure of the storage section as a cylinder structure, and then separating the first receiving cavity 310 and the second receiving cavity 320 by the first partition 330, the structure is simple to manufacture and has low cost.

[0039] Furthermore, the air inlet 311 is located on the side wall of the first cylinder, and an air inlet flange is installed at the air inlet 311; the air outlet 321 is located on the other side wall of the first cylinder, and the air outlet 321 is arranged opposite to the air inlet 311, and an air outlet flange is installed at the air outlet 321.

[0040] In this embodiment, the top opening of the first cylinder is provided with a cover plate, which is detachably connected to the first cylinder to facilitate rinsing of the first cylinder.

[0041] Similarly, both the primary and secondary condensing sections are located in the second cylinder. The second cylinder is equipped with an insulation plate 150, which divides the interior of the second cylinder into a first heat exchange chamber 110 and a second heat exchange chamber 130 that are not connected. The main structure of the primary and secondary condensing sections is set as a cylinder, and then the insulation plate 150 is used to separate the first heat exchange chamber 110 and the second heat exchange chamber 130, which is simple to process.

[0042] The insulation board 150 here can be made of heat insulation materials such as polyurethane and foamed rubber to avoid heat loss caused by heat exchange between the first cooling medium and the second medium.

[0043] Furthermore, the side wall of the second cylinder is provided with a first inlet 111, a first outlet 112, a second inlet 131, and a second outlet 132. The first inlet 111, the first heat exchange chamber 110, and the first outlet 112 are connected in sequence, and the first cooling medium enters and exits the first heat exchange chamber 110 from the first inlet 111 and the first outlet 112. The second inlet 131, the second heat exchange chamber 130, and the second outlet 132 are connected in sequence, and the second medium enters and exits the second heat exchange chamber 130 from the second inlet 131 and the second outlet 132.

[0044] Since the waste steam in the first heat exchange tube 120 flows from top to bottom, the first inlet 111 and the first outlet 112 are set from top to bottom, so that the flow direction of the first cooling medium is the same as that of the waste steam, resulting in high heat exchange efficiency. The primary condensate in the second heat exchange tube 140 flows from bottom to top, so the second inlet 131 and the second outlet 132 are set from bottom to top, so that the flow direction of the second cooling medium is the same as that of the primary condensate, resulting in high heat exchange efficiency.

[0045] Furthermore, the first heat exchange tube 120 and the second heat exchange tube 140 are respectively vertically arranged inside the second cylinder. Multiple baffles 160 are provided on the inner sidewall of the first heat exchange cavity 110 and the inner sidewall of the second heat exchange cavity 130. The multiple baffles 160 in the first heat exchange cavity 110 are distributed at intervals along the axial direction (i.e., along the vertical direction) of the second cylinder, so that the first cooling medium enters the first heat exchange cavity 110 from the first inlet 111, passes through multiple stages of baffles 160, and then flows out from the first outlet 112, fully exchanging heat with the waste steam in the first heat exchange tube 120. The multiple baffles 160 in the second heat exchange cavity 130 are also distributed at intervals along the axial direction of the second cylinder, so that the second medium enters the second heat exchange cavity 130, passes through multiple stages of baffles 160, and then flows out from the second outlet 132, fully exchanging heat with the first-stage condensate in the second heat exchange tube 140.

[0046] In this embodiment, the second cylinder and the first cylinder are separated by a first tube sheet. Specifically, the second cylinder and the first cylinder are welded to the first tube sheet respectively. The first heat exchange tube 120 and the second heat exchange tube 140 are disposed through the first tube sheet and are connected to the first receiving cavity 310 and the second receiving cavity 320 respectively.

[0047] The bottom of the side wall of the second cylinder is provided with two drain ports, which are located on the side wall of the first heat exchange chamber 110 and the side wall of the second heat exchange chamber 130, respectively, for draining wastewater used to clean the second cylinder.

[0048] Optionally, the steam-water separation section is located in the third cylinder, the separation chamber 210 is located inside the third cylinder, the first opening and the second opening are spaced apart at the top of the third cylinder, and the water removal port 213 is located at the bottom of the third cylinder. Setting the main body of the steam-water separation section as a cylinder structure results in a simple structure.

[0049] Similarly, the third cylinder and the second cylinder are separated by a second tube sheet, and the first heat exchange tube 120 and the second heat exchange tube 140 pass through the first opening and the second opening on the second tube sheet.

[0050] Here, the second tube sheet is a flanged tube sheet, which allows the third and second cylinders to be detachably connected through the flanged tube sheet. When the first heat exchange tube 120 and the second heat exchange tube 140 are severely blocked, the third and second cylinders can be disassembled.

[0051] Furthermore, the separation assembly includes multiple separation baffles 220, all of which are fixed to the inner wall of the third cylinder. The multiple separation baffles 220 are spaced apart from top to bottom, and the uppermost separation baffle 220 is positioned directly opposite the first opening, so that the gas-liquid mixture flowing out of the first heat exchange tube 120 can collide with the separation baffles 220 as soon as it enters the separation chamber 210, thereby improving the gas-liquid separation effect. The multiple baffles are also intended to allow the gas-liquid mixture to undergo multiple impacts during its descent, further improving the gas-liquid separation effect.

[0052] Furthermore, the separation assembly also includes a second partition 230, which is located between the first opening and the second opening and abuts against the inner wall of the separation chamber 210. The second partition 230 divides the separation chamber 210 into a first separation chamber 210 and a second separation chamber 210 that are connected at the bottom. That is, the first separation chamber 210 and the second separation chamber 210 are not connected at the top but are connected at the bottom. This allows the gas-liquid mixture to be separated in the first separation chamber 210, and the primary condensate gas to enter the second separation chamber 210 from the bottom of the first separation chamber 210. This prevents some gas-liquid mixture from not impacting the separation baffle 220 or impacting the upper separation baffles 220 and directly entering the second heat exchange tube 140, which would result in insufficient gas-liquid separation.

[0053] Furthermore, the side wall of the third cylinder is provided with a first hand hole 211 and a second hand hole 212. The first hand hole 211 and the second hand hole 212 are located at the locations of the first separation chamber 210 and the second separation chamber 210, respectively. When cleaning the third cylinder, the first hand hole 211 and the second hand hole 212 are used to assist in cleaning the discharged material.

[0054] It should be noted that the first handhole 211 and the second handhole 212 should be installed above the uppermost separation baffle 220 to avoid the separation baffle 220.

[0055] To facilitate observation of the gas-water separation in the first separation chamber 210, a sight glass 250 is provided on the outer wall of the third cylinder, specifically on the side where the first separation chamber 210 is located. The sight glass 250 is located below the lowest separation baffle 220.

[0056] To facilitate the discharge of primary and secondary condensate, the bottom of the third cylinder is provided with a conical head, and the water removal port 213 is located at the bottom of the head. The head is also provided with a buffer plate 240, which is located directly above the water removal port 213. This buffers the primary and secondary condensate as it flows out of the water removal port 213 and also blocks the condensate gas, preventing the primary condensate gas from escaping from the water removal port 213.

[0057] Of course, it can also be in the form of a round head and a square head, or an elliptical head, etc.

[0058] The cross-sections of the first, second, and third cylinders can be rectangular or circular, etc.

[0059] In this embodiment, the cross-sections of the first cylinder, the second cylinder, and the third cylinder are circular, and they have the same diameter.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A wastewater steam pretreatment device, characterized in that, include: The first-stage condensation section includes a first heat exchange chamber (110) and a first heat exchange tube (120). The first heat exchange tube (120) is located inside the first heat exchange chamber (110), and a first cooling medium can be introduced into the first heat exchange chamber (110). The secondary condensation section includes a second heat exchange chamber (130) and a second heat exchange tube (140). The second heat exchange tube (140) is located inside the second heat exchange chamber (130), and a second cooling medium can be introduced into the second heat exchange chamber (130). A steam-water separation section is located at the bottom of the primary condensation section and the secondary condensation section. The steam-water separation section includes a separation chamber (210) and a separation component. The separation component is located inside the separation chamber (210). The top of the separation chamber (210) is provided with a first opening and a second opening, and the bottom is provided with a water removal port (213). The bottom ends of the first heat exchange tube (120) and the second heat exchange tube (140) are respectively connected to the first opening and the second opening. The waste steam to be treated can exchange heat with the first cooling medium in the first heat exchange tube (120) to form a gas-liquid mixture consisting of primary condensate and primary condensate. The gas-liquid mixture can collide with the separation component in the separation chamber (210) to separate the primary condensate and the primary condensate. The separated primary condensate can exchange heat with the second cooling medium in the second heat exchange tube (140) to form secondary condensate and secondary condensate. Both the primary condensate and the secondary condensate can be discharged from the water outlet (213). The secondary condensate can be discharged from the top of the second heat exchange tube (140).

2. The wastewater steam pretreatment device according to claim 1, characterized in that, The waste steam pretreatment device further includes a storage section located at the top of the primary condensation section and the secondary condensation section. The storage section includes a first receiving cavity (310) and a second receiving cavity (320) that are not connected. The first receiving cavity (310) is provided with an air inlet (311), and the top ends of the air inlet (311), the first receiving cavity (310), and the first heat exchange tube (120) are connected in sequence. The second receiving cavity (320) is provided with an air outlet (321), and the top ends of the second heat exchange tube (140), the second receiving cavity (320), and the air outlet (321) are connected in sequence.

3. The wastewater steam pretreatment device according to claim 2, characterized in that, The storage section is located in the first cylinder, and the first cylinder is provided with a first partition (330), which divides the interior of the first cylinder into a first receiving cavity (310) and a second receiving cavity (320) that are not connected.

4. The wastewater steam pretreatment device according to claim 1, characterized in that, Both the primary condensation section and the secondary condensation section are located in the second cylinder. The second cylinder is provided with a heat insulation plate (150), which divides the interior of the second cylinder into a non-connected first heat exchange chamber (110) and a second heat exchange chamber (130).

5. The wastewater steam pretreatment device according to claim 4, characterized in that, The second cylinder has a first inlet (111), a first outlet (112), a second inlet (131), and a second outlet (132) on its side wall. The first inlet (111), the first heat exchange chamber (110), and the first outlet (112) are connected in sequence. The second inlet (131), the second heat exchange chamber (130), and the second outlet (132) are connected in sequence.

6. The wastewater steam pretreatment device according to claim 1, characterized in that, The steam-water separation section is located in the third cylinder, the separation chamber (210) is located inside the third cylinder, the first opening and the second opening are spaced apart at the top of the third cylinder, and the water removal port (213) is located at the bottom of the third cylinder.

7. The wastewater steam pretreatment device according to claim 6, characterized in that, The separation assembly includes multiple separation baffles (220), all of which are fixed to the inner wall of the third cylinder. The multiple separation baffles (220) are spaced apart from top to bottom, and the uppermost separation baffle (220) is positioned directly opposite the first opening.

8. The wastewater steam pretreatment device according to claim 7, characterized in that, The separation assembly further includes a second partition (230) located between the first opening and the second opening and abutting against the inner wall of the separation cavity (210). The second partition (230) divides the separation cavity (210) into a first separation cavity (210) and a second separation cavity (210) with the bottom connected.

9. The wastewater steam pretreatment device according to claim 8, characterized in that, The side wall of the third cylinder is provided with a first hand hole (211) and a second hand hole (212), which are located at the locations of the first separation cavity (210) and the second separation cavity (210), respectively.

10. The wastewater steam pretreatment device according to claim 8, characterized in that, The bottom of the third cylinder is provided with a conical sealing head, the water outlet (213) is located at the bottom of the sealing head, and a buffer plate (240) is provided inside the sealing head, the buffer plate (240) being located directly above the water outlet (213).

Images