Sewage steam stripping system and control method

Abstract

According to the sewage steam stripping system and the control method provided by the invention, the structure of the sewage steam stripping system is improved, so that the sewage steam stripping system is simplified. The sewage steam stripping system comprises a steam stripping tower and a condenser, and the steam stripping tower is provided with a steam stripping gas outlet; the condenser is fixed on the stripping tower; and an inlet of the condenser is communicated with the stripping gas outlet. The condenser is directly fixed on the stripping tower, so that the pipeline layout of the sewage stripping system can be effectively simplified, and the structure of the sewage stripping system is simplified.

Description

Technical Field

[0001] This application relates to the field of pulping system technology, and more specifically, to a wastewater stripping system and its control method. Background Technology

[0002] A large amount of wastewater condensate is generated during pulp production. Currently, the industry generally uses wastewater stripping systems as the main treatment method for wastewater condensate. Simplifying wastewater stripping systems has been a long-standing goal for those skilled in the art. Summary of the Invention

[0003] The purpose of this invention is to provide a wastewater stripping system and a control method, which simplifies the wastewater stripping system by improving its structure.

[0004] To achieve the above objectives, the present invention provides a wastewater stripping system, which includes a stripping tower and a condenser; the stripping tower is provided with a stripping gas outlet; the condenser is fixed to the stripping tower, and the inlet of the condenser is connected to the stripping gas outlet. In the technical solution of this application, by directly fixing the condenser to the stripping tower, the pipeline layout of the wastewater stripping system can be effectively simplified, thereby simplifying the wastewater stripping system.

[0005] Optionally, the condenser is fixed to the top of the stripping tower. In this way, the condensate from the stripped gas after condensation can flow back into the stripping tower under the action of gravity through the condenser inlet and the stripped gas outlet, thereby replenishing the stripping tower with water and enabling secondary stripping within the stripping tower.

[0006] Optionally, a first fitting is provided at the top of the stripping tower, and a second fitting is provided on the condenser; the first fitting is connected to the stripped gas outlet, and the second fitting is connected to the condenser inlet; the second fitting abuts against the first fitting vertically. By adopting this method, the first and second fittings serve two functions: firstly, to connect the condenser and the stripping tower, and secondly, to vertically support the condenser, thus supporting the condenser at the top of the stripping tower.

[0007] Optionally, the condenser includes a condenser tank with an inner cavity and several refrigerant channels disposed within the inner cavity. The refrigerant channels are isolated from the inner cavity and are used to circulate the heat exchange medium. The inner cavity is provided with a condenser inlet. The central axis of the refrigerant channels is perpendicular to the central axis of the stripping tower; or, the central axis of the refrigerant channels is parallel to the central axis of the stripping tower. In this way, the stripped gas can exchange heat with the refrigerant channels within the inner cavity, and the condensable substances in the stripped gas can condense into a liquid state and flow back into the stripping tower.

[0008] Optionally, the stripping tower includes several trays spaced apart along the axial direction of the stripping tower, and the trays are provided with several through holes; the stripping tower also includes guide plates, the two ends of which are fixed to the trays, and at least a portion of the middle of the guide plates is spaced apart from the through holes along the axial direction. Through the structural design of arranging the guide plates and through holes opposite each other in the axial direction of the stripping tower, the guide plates can guide the gas to flow out uniformly, increasing the contact area between wastewater and steam; at the same time, compared with traditional trays with float valves, the method of fixing the guide plates to the trays can avoid problems such as easy wear, jamming, and detachment of the float valves, reducing the risk of mechanical failure in the stripping tower.

[0009] Optionally, the cross-section of the axial guide vane is V-shaped. The V-shaped guide vane can make the velocity distribution more uniform when the gas rises vertically; at the same time, it can improve the adequacy of gas-liquid contact.

[0010] Optionally, the cross-section of the axial guide vane can be trapezoidal. This extends the contact time between the gas and wastewater, improving pollutant removal efficiency.

[0011] Optionally, the guide plate can be projected axially to form a projection surface, which covers the corresponding through-hole. In this way, under the action of the guide plate, the gas can pass through the through-hole axially and then flow out of the guide plate radially to contact the sewage; by covering the through-hole with the guide plate, more gas from the through-hole can be captured, further ensuring sufficient gas-liquid contact.

[0012] Optionally, the edge of the projected surface is aligned with the edge of the via. This can further reduce or eliminate ineffective flow paths and further improve the adequacy of gas-liquid contact.

[0013] Optionally, the tray and guide plate are manufactured as a single unit. This simplifies the manufacturing process and significantly improves manufacturing efficiency, while also strengthening the structural strength of the tray.

[0014] Optionally, each tray is provided with several flow guiding component groups, which are sequentially distributed along a first direction of the tray; each flow guiding component group includes several flow guiding sections sequentially distributed along a second direction; the flow guiding sections belonging to two adjacent flow guiding component groups are staggered along the first direction. This forces the gas / liquid to form a "serpentine" or "spiral" flow path on the tray, preventing excessively high local flow velocities that would cause the gas to bypass the wastewater liquid layer and rise directly, or excessively low velocities that would cause the wastewater liquid layer to stagnate, thus achieving uniform gas-liquid flow path.

[0015] Optionally, the stripping tower also includes a steam inlet for communication with a steam source, and the condenser includes a condenser tank and several independent refrigerant channels disposed within the condenser tank. The condenser tank is provided with an inlet for the condenser; the refrigerant channels include a refrigerant inlet and a refrigerant outlet.

[0016] It also includes a first valve section, which is located at the refrigerant inlet or refrigerant outlet, and controls the amount of steam entering the steam inlet.

[0017] Another aspect of this application provides a control method for a wastewater stripping system. The condenser includes a condenser tank and several independent refrigerant channels disposed within the condenser tank. The condenser tank is provided with a condenser inlet. The refrigerant channels include a refrigerant inlet and a refrigerant outlet. The system also includes a first valve located at the refrigerant inlet or refrigerant outlet. The control method includes:

[0018] Adjust the opening of the first valve section to regulate the condensing efficiency of the condenser.

[0019] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0021] Figure 1 This is a schematic diagram of the wastewater stripping system in the embodiments of this application;

[0022] Figure 2 This is a partial structural diagram of a wastewater stripping system in the prior art;

[0023] Figure 3 This is a cross-sectional view of the drainage section and the tray in the first embodiment;

[0024] Figure 4 This is a cross-sectional view of the drainage section and the tray in the second embodiment;

[0025] Figure 5 A top view of the tray along the axial direction of the stripping tower.

[0026] Figure label:

[0027] 1-Stripping tower; 11-First pipe fitting; 2-Tower plate; 21-Flow guide section; 211-Through hole; 212-Flow guide plate; 212a-Bend section; 210-Flow guide assembly; 3-Steam source; 4-Condenser; 41-Second pipe fitting; 42-Condensate tank; 43-Refrigerant flow channel; 44-Water storage tank; 45-First condensate pump; 46-Second condensate pump; 5-Heat exchanger; 6-Condensate storage section; 7-Sludge condensate source; 8-First valve section. Detailed Implementation

[0028] In related technologies, such as Figure 2 As shown, Figure 2This is a partial structural diagram of a wastewater stripping system in the prior art.

[0029] exist Figure 2 The wastewater stripping system includes a stripping tower 1, a condenser 4, a water storage tank 44, and a first condensate pump 45. The stripping tower 1 has a stripping gas outlet, which is connected to the inlet of the condenser 4 via a pipeline. After entering the condenser 4, the stripping gas undergoes heat exchange to form stripping gas condensate. The outlet of the condenser 4 is connected to the inlet of the water storage tank 44 to collect the stripping gas condensate. The outlet of the water storage tank 44 is connected to the return outlet of the stripping tower 1 via a pipeline. The first condensate pump 45 can also be installed on this pipeline to pump the stripping gas condensate from the water storage tank 44 back to the stripping tower 1. This wastewater stripping system can return stripping gas condensate to the stripping tower 1, but its structure is relatively complex.

[0030] This invention provides a wastewater stripping system, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the wastewater stripping system in the embodiments of this application.

[0031] The wastewater stripping system includes a stripping tower 1 and a condenser 4. The stripping tower 1 is provided with a stripping gas outlet, and the condenser 4 is fixed to the stripping tower 1. The inlet of the condenser 4 is connected to the stripping gas outlet, and the stripping gas in the stripping tower 1 can enter the condenser 4 and exchange heat with the condenser 4.

[0032] The stripping tower 1 is the core equipment of the wastewater stripping system and can be a plate tower or a packed tower structure. Wastewater from wastewater source 7 enters from the top or middle of the tower, forming a liquid layer on the tower plate 2. Steam or inert gas is introduced into the bottom of the stripping tower 1 as the stripping medium, and the gas flows from bottom to top, contacting the liquid layer countercurrently. Volatile pollutants undergo mass transfer at the gas-liquid interface, transferring from the liquid phase to the gas phase, and are finally discharged from the stripping gas outlet at the top of the tower. The purified stripped condensate is discharged from the bottom of the tower, thereby achieving wastewater purification.

[0033] The stripping gas outlet is an opening or pipe interface located at the top of stripping tower 1, used to discharge gases containing volatile pollutants generated during the stripping process.

[0034] Condenser 4 is used to cool stripped gas, causing condensable components (such as steam and pollutants) to condense into liquid, while non-condensable gases are discharged.

[0035] Compared with related technologies, in the technical solution of this application, by directly fixing the condenser 4 to the stripping tower 1, the stripping gas enters the condenser 4 through the inlet of the condenser 4, eliminating the need for pipeline installation between the stripping gas outlet and the inlet of the condenser 4, effectively simplifying the pipeline layout of the sewage stripping system, thereby simplifying the structure of the sewage stripping system.

[0036] As an alternative, the condenser 4 is fixed vertically to the top of the stripping tower 1. In this way, the stripped condensate, after being condensed in the condenser 4, can flow back into the stripping tower 1 under the action of gravity through the inlet and outlet of the condenser 4, thereby replenishing the water supply to the stripping tower 1 and enabling secondary stripping within the stripping tower 1.

[0037] To achieve a fixed connection between the condenser 4 and the stripping tower 1 while also allowing the stripping gas outlet to be connected to the inlet of the condenser 4, the stripping tower 1 and the condenser 4 are fixed together via a flange adapter. Specifically, the flange adapter includes a first pipe fitting 11 and a second pipe fitting 12, which are coaxially arranged.

[0038] Specifically, the top of the stripping tower 1 is provided with a first pipe 11 that communicates with the stripping gas outlet, and the bottom of the condenser 4 is provided with a second pipe 41 that communicates with the inlet of the condenser 4. The second pipe 41 is vertically connected to the first pipe 11.

[0039] A sealing device is provided at the position where the first pipe fitting 11 and the second pipe fitting 41 abut against each other, thereby achieving the sealing and isolation of the first pipe fitting 11 and the second pipe fitting 41 from the outside.

[0040] By adopting this method, the first fitting 11 and the second fitting 41 serve to connect the condenser 4 and the stripping tower 1, and also provide vertical support for the condenser 4, thereby supporting the condenser 4 at the top of the stripping tower 1.

[0041] In a more specific embodiment, the condenser 4 includes a condenser tank 42 with an inner cavity and a plurality of refrigerant channels 43 disposed in the inner cavity. The refrigerant channels 43 are isolated from the inner cavity and are used to circulate the heat exchange medium. The inner cavity is provided with an inlet for the condenser 4. The central axis of the refrigerant channels 43 is perpendicular to the central axis of the stripping tower 1. Alternatively, the central axis of the refrigerant channels 43 is parallel to the central axis of the stripping tower 1.

[0042] In this embodiment, the refrigerant channel 43 has a medium inlet and a medium outlet. The heat exchange medium used for heat exchange with the stripping gas enters the refrigerant channel 43 through the medium inlet and flows out of the refrigerant channel 43 through the medium outlet. The inner cavity is connected to the channels between each refrigerant channel 43.

[0043] The inner cavity is provided with an inlet for the condenser 4 and an outlet for the condenser 4. After the stripping gas enters the inner cavity through the inlet of the condenser 4, it exchanges heat with the heat exchange medium after passing through the channels between the various refrigerant flow channels 43. At least part of the water vapor in the stripping gas is condensed and flows back to the stripping tower 1 through the inlet of the condenser 4, while the remaining stripping gas is discharged through the outlet of the condenser 4.

[0044] In this way, the stripping gas can exchange heat with the refrigerant flow channel 43 in the inner cavity, and the water vapor in the stripping gas can condense into liquid and flow back into the stripping tower 1.

[0045] In the aforementioned embodiments, the stripping tower 1 is further provided with a stripping medium inlet, which is connected to the stripping medium source 3. Figure 1 In the example shown, the stripping medium inlet is located near the bottom of the stripping tower 1.

[0046] The wastewater stripping system also includes a wastewater condensate source 7, which is the wastewater to be treated. A wastewater inlet is located near the top of the stripping tower 1, and the wastewater condensate source 7 is connected to the wastewater inlet.

[0047] As an optional solution, to preheat the wastewater entering the stripping tower 1, the wastewater stripping system also includes a heat exchanger 5. One end of the heat exchanger 5 is connected to the stripped condensate outlet of the stripping tower 1, and the other end is connected to the stripped condensate storage section 6. Wastewater from the wastewater condensate source 7 can exchange heat with the stripped condensate within the heat exchanger 5. The stripped condensate refers to the purified condensate within the stripping tower 1. A second condensate pump 46 can also be installed between the heat exchanger 5 and the stripped condensate outlet to pump the stripped condensate from the stripping tower 1 into the heat exchanger 5.

[0048] Several trays 2 are installed between the wastewater inlet and the stripping medium inlet. The trays 2 are the core mechanism in the stripping tower 1 that isolates the stripping medium from the wastewater surface. In the stripping process, multiple trays 2 constitute a "stripping section," achieving deep removal of pollutants through staged contact.

[0049] In the aforementioned embodiments, the stripping tower 1 further includes a steam inlet for communication with the steam source 3, and the refrigerant flow channel 43 includes a refrigerant inlet and a refrigerant outlet. It also includes a first valve 8, which is disposed at the refrigerant inlet or the refrigerant outlet, and controls the amount of steam entering the steam inlet.

[0050] By controlling the opening degree of the first valve section 8, the flow rate of the refrigerant flowing through the refrigerant channel 43 per unit time can be adjusted, thereby adjusting the condensing efficiency of the condenser 4, and thus adjusting the flow rate of the stripped condensate water returning from the condenser 4 to the stripping tower 1.

[0051] At the same time, it can also affect the gas pressure inside stripper 1. The condensing efficiency of condenser 4 is inversely proportional to the gas pressure inside stripper 1; that is, the higher the condensing efficiency, the lower the gas pressure inside stripper 1, and the greater the amount of steam that can enter stripper 1. Conversely, the lower the condensing efficiency, the higher the gas pressure inside stripper 1, and the less steam that can enter stripper 1.

[0052] In this way, the flow rate of stripped condensate entering the stripping tower 1 can be adjusted by regulating the opening of the first valve section 8, and the amount of steam entering the steam inlet can also be adjusted.

[0053] This approach can further simplify the structure of the wastewater stripping system and reduce the complexity of its pipeline layout.

[0054] In another aspect of this application, a control method for a wastewater stripping system is also provided. The condenser 4 includes a condenser tank 42 and several independent refrigerant channels 43 disposed within the condenser tank 42. The condenser tank 42 is provided with an inlet for the condenser 4. The refrigerant channels 43 include a refrigerant inlet and a refrigerant outlet. The system also includes a first valve 8, which is disposed at the refrigerant inlet or the refrigerant outlet.

[0055] Control methods include:

[0056] The opening degree of the first valve section 8 is adjusted to regulate the condensing efficiency of the condenser 4. This method can replace the valve used to regulate the steam flow in traditional solutions. It also allows for control of the flow rate of the stripping water after condensation. This control method further reduces costs and increases efficiency in the wastewater stripping system.

[0057] In another aspect of this application, the risk of mechanical failure of the stripping tower 1 is reduced by modifying its structure.

[0058] In such Figure 1 , Figures 3 to 5 In the example shown, Figure 3 This is a cross-sectional view of the flow section 21 and the tray 2 in the first embodiment. Figure 4 This is a cross-sectional view of the flow section 21 and the tray 2 in the second embodiment. Figure 5 Top view of tray 2 along the axial direction of stripper 1.

[0059] The stripping tower 1 includes several spaced-apart trays 2, each tray 2 having several flow guides 21. The trays 2 are spaced-apart sequentially along the axial direction of the stripping tower 1. Each flow guide 21 includes a through hole 211 disposed on the tray 2 and a guide plate 212. The two ends of the guide plate 212 are fixed to the sides of the through hole 211, and at least a portion of the middle part of the guide plate 212 is spaced apart from the through hole 211 along the axial direction of the stripping tower 1. The through hole 211 forms an axially extending gas channel, and the spaced-apart arrangement of the guide plate 212 with the through hole 211 forms a radial gas channel. The stripping medium first enters the through hole 211 and flows axially, then flows radially under the obstruction of the guide plate 212, and subsequently comes into contact with the wastewater.

[0060] By arranging guide plates 212 and through holes 211 opposite each other in the axial direction of the stripping tower 1, the guide plates 212 can guide the gas to pass through the wastewater evenly, increasing the contact area between the wastewater and the stripping medium. At the same time, compared with the traditional tower plate 2 with float valves, the way the guide plates 212 are fixed to the tower plate 2 can avoid problems such as easy wear, jamming, and falling off of the float valves, thereby reducing the risk of mechanical failure of the stripping tower 1.

[0061] In the technical solution of this application, the guide plate 212 has a bent structure and has at least one bent portion 212a. In such a case... Figure 3 In the example shown, when the guide vane 212 has a bend 212a, the cross-section of the guide vane 212 in the axial direction is V-shaped. The V-shaped guide vane 212 can make the velocity distribution of the gas more uniform when it rises vertically. At the same time, it improves the adequacy of gas-liquid contact.

[0062] In such Figure 4 In the example shown, when the guide plate 212 has two bends 212a, the cross-section of the guide plate 212 along the axis is trapezoidal. The larger end of the trapezoid is fixed to the tower plate 2, and the smaller end is spaced apart from the through hole 211. This extends the contact time between the gas and the wastewater, improving the pollutant removal efficiency.

[0063] In such Figure 5 In the example shown, the guide plate 212 is projected axially to form a projection surface, which covers the corresponding through hole 211. In this way, under the action of the guide plate 212, gas can pass axially through the through hole 211 and then flow radially out of the guide plate 212, thus contacting the wastewater. By covering the through hole 211 with the guide plate 212, more gas from the through hole 211 can be captured, further ensuring sufficient gas-liquid contact.

[0064] Furthermore, the edge of the projected surface is aligned with the edge of the via 211. This further reduces or eliminates ineffective flow paths and further improves the adequacy of gas-liquid contact.

[0065] In a more specific embodiment, the drainage section 21 is a one-piece machined structure.

[0066] Specifically, the through hole 211 and the guide plate 212 can be processed by cutting or stamping. This simplifies the processing method of the flow guide 21 and significantly improves the processing efficiency, while also strengthening the structural strength of the tray 2.

[0067] In the aforementioned embodiments, such as Figure 5As shown, each tray 2 is provided with a plurality of flow guiding element groups 210, which are sequentially distributed along a first direction of the tray 2. Each flow guiding element group 210 includes a plurality of flow guiding sections 21 sequentially distributed along a second direction. The flow guiding sections 21 of two adjacent flow guiding element groups 210 are staggered along the first direction. The central axes of the flow guiding sections 21 of two adjacent flow guiding element groups 210 extending along the first direction are spaced apart.

[0068] This forces the gas / liquid to form a "serpentine" or "spiral" flow path on the tray 2, avoiding excessively high local flow velocities that cause the gas to bypass the wastewater liquid layer and rise directly, or excessively low flow velocities that cause the wastewater liquid layer to stagnate, thus achieving uniformity of the gas-liquid flow path.

[0069] Compared with existing technologies, the advantages of this application are:

[0070] First, by directly fixing the condenser 4 to the stripping tower 1, the stripping gas enters the condenser 4 through the inlet of the condenser 4, eliminating the need for piping between the stripping gas outlet and the inlet of the condenser 4, effectively simplifying the piping layout of the wastewater stripping system, thereby simplifying the wastewater stripping system.

[0071] Secondly, by adopting this method, the first fitting 11 and the second fitting 41 serve to connect the condenser 4 and the stripping tower 1, and also provide vertical support for the condenser 4, thereby supporting the condenser 4 at the top of the stripping tower 1.

[0072] Third, through the structural design of arranging guide plates 212 and through holes 211 opposite each other in the axial direction of the stripping tower 1, the guide plates 212 can guide the gas to pass through the through holes 211 at uniform intervals, increasing the contact area between the wastewater and the stripping medium. At the same time, compared with the traditional tower plate 2 with float valves, the way the guide plates 212 are fixed to the tower plate 2 solves the problems of easy wear, jamming, and falling off of the float valves, reducing the risk of mechanical failure of the stripping tower 1.

[0073] Fourth, the large, separate pneumatic valve 9 for controlling steam flow has been eliminated. Instead, the steam inlet flow is controlled by the first valve section 8 at the refrigerant outlet. By adjusting the opening of the first valve section 8, the condensation rate of the downstream condenser 4 is controlled, which in turn affects the pressure inside the stripping tower 1. Changes in the pressure inside the stripping tower 1 result in changes in the steam inlet flow, thus achieving the purpose of controlling the steam inlet flow. The adjustment of the first valve section 8 can be controlled by a fixed ratio of sludge condensate to steam flow, or it can be controlled by a stripping condensate conductivity meter.

[0074] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above description of the implementation methods is only for the purpose of helping to understand the core ideas of the present invention. It should be noted that relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0075] The foregoing embodiments are merely illustrative. Those skilled in the art can make various improvements and modifications to the invention without departing from its principles, and these improvements and modifications also fall within the scope of the claims. Furthermore, those skilled in the art can combine the various embodiments in part or in whole, and all technical solutions derived from such combinations fall within the scope of this patent.

Claims

1. A sewage stripping system characterised in that, The stripper (1) is provided with a stripping gas outlet; the condenser (4) is fixed to the stripper (1), and the inlet of the condenser (4) is communicated with the stripping gas outlet.

2. The sour water stripping system of claim 1, wherein, In the vertical direction, the condenser (4) is fixed to the top of the stripper (1).

3. The sour water stripping system of claim 2, wherein, The stripper (1) and the condenser (4) are fixedly connected through a flange adapter.

4. A sour water stripping system according to any one of claims 1-3, characterized in that, The stripper (1) comprises a plurality of tower plates (2) distributed at intervals, and the tower plate (2) is provided with a plurality of flow guide parts (21). The flow guide part (21) comprises a through hole (211) provided on the tower plate (2) and a flow guide plate (212), both ends of the flow guide plate (212) are fixed to both sides of the through hole (211), and at least part of the middle part of the flow guide plate (212) is arranged at intervals with the through hole (211) along the axial direction of the stripper (1).

5. The sour water stripping system of claim 4, wherein, Each tower plate (2) is provided with a plurality of flow guide part groups (210), which are distributed in sequence along the first direction of the tower plate (2); each flow guide part group (210) comprises a plurality of flow guide parts (21) distributed in sequence along the second direction; the flow guide parts (21) belonging to adjacent two flow guide part groups (210) are staggered distributed along the first direction.

6. The sour water stripping system of claim 5, wherein, The cross section of the flow guide plate (212) along the axial direction of the stripper (1) is V-shaped; or the cross section of the flow guide plate (212) along the axial direction of the stripper (1) is trapezoidal.

7. The sour water stripping system of claim 6, wherein, The flow guide plate (212) is projected along the axial direction of the stripper (1) to form a projection surface, and the projection surface covers the corresponding through hole (211).

8. The sour water stripping system of claim 7, wherein, The edge of the projection surface is aligned with the edge of the through hole (211).

9. A sour water stripping system according to any one of claims 1-3, characterized in that, The stripper (1) further comprises a steam inlet for communicating with a steam source (3), the condenser (4) comprises a condenser tank (42) and a plurality of independent refrigerant flow channels (43) arranged in the condenser tank (42), the condenser tank (42) is provided with the inlet of the condenser (4); the refrigerant flow channel (43) comprises a refrigerant inlet and a refrigerant outlet; Further comprising a first valve part (8) arranged at the refrigerant inlet or the refrigerant outlet, the amount of steam entering the steam inlet is controlled through the first valve part (8).

10. A method of controlling a sour water stripping system, characterized by, The condenser (4) comprises a condenser tank (42) and a plurality of independent refrigerant flow channels (43) arranged in the condenser tank (42), the condenser tank (42) is provided with the inlet of the condenser (4); the refrigerant flow channel (43) comprises a refrigerant inlet and a refrigerant outlet; further comprising a first valve part (8) arranged at the refrigerant inlet or the refrigerant outlet; The control method comprises: Adjusting the opening degree of the first valve part (8) to adjust the condensing efficiency of the condenser (4).

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