Condensate recovery device
The condensate recovery device, consisting of a collection tank, an accelerating diversion pipe, a sand removal tank, and a centrifugal tank, utilizes centrifugal separation and cyclone separation technologies to solve the problem of high solid content in underground coal mine condensate, achieving safe and reliable condensate recovery and purification.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI HUIHUA LIANKE COAL RES & DESIGN CO LTD
- Filing Date
- 2025-08-28
- Publication Date
- 2026-07-21
AI Technical Summary
In existing coal mine underground equipment condensate recovery technologies, the condensate has a high solid content, which leads to damage to the booster pump system, filter clogging, and safety hazards. Moreover, the existing technologies are not reliable enough, have a short lifespan, and unstable performance.
The condensate recovery device consists of a collection tank, an accelerating diversion pipe, a sand removal tank, and a centrifugal tank. It achieves solid-liquid separation and purification through centrifugal separation and cyclone separation technologies, combined with a conical structure and filter cake assembly.
It effectively avoids damage to the pressurization system caused by solid-liquid entrainment, ensures the safety, reliability and service life of the device, improves solid-liquid separation efficiency, reduces secondary pollution, and achieves efficient condensate recovery.
Smart Images
Figure CN224524221U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal mine equipment technology, and in particular to a condensate recovery device. Background Technology
[0002] During the operation of equipment in underground coal mines, equipment such as coal mining machines, hydraulic supports, and conveyors generate a significant amount of condensate due to cooling water circulation and changes in ambient temperature and humidity. This condensate is mixed with solid impurities such as coal slag, iron filings, and rock powder, with a solid content often ranging from 5% to 20%. Direct discharge of this condensate not only wastes water resources but also pollutes the tunnel environment. Therefore, recycling and reusing this condensate is crucial for coal mine operations.
[0003] Existing condensate recovery technologies used in coal mine operations employ multi-stage booster pumps to propel condensate through a filtration system, either within pipelines or via separate filters, before discharge. As mentioned earlier, coal mine condensate has a high solids content and complex composition. Transporting this type of water can cause irreversible damage to the impellers and worm gears of the booster pump system, resulting in a short system lifespan and unstable performance. Furthermore, unevenly sized particles can clog filters, affecting water flow rate and pressure, leading to pressure imbalances within the pipelines and posing safety hazards such as leaks or even bursts.
[0004] In summary, there is an urgent need for a condensate recovery technology that is easy and quick to operate, has a reliable structure, a long service life, and a low failure rate. Utility Model Content
[0005] To address the aforementioned problems, this invention provides a condensate recovery device.
[0006] The technical solution adopted in this utility model is as follows: A condensate recovery device, comprising: The liquid collection tank has a first opening and a second opening at its bottom. The first opening is located at the center of its bottom, and the second opening is close to the first opening. The accelerated drainage tube includes a drain end and a throat end. One end of the drain end is connected to a first opening, and the other end is connected to one end of the throat end. The diameter of the drain port is larger than the diameter of the throat port. From the drain end to the throat end, the connection between the drain end and the throat end forms a tapered contraction. The sand removal tank includes a tank body and a sand collection box. The sand collection box is located below the tank body. A water inlet pipe is provided on the upper side wall of the tank body along the tangent direction of the side wall of the tank body. The water inlet pipe is connected to the other end of the throat end. A water outlet pipe is provided on the top of the tank body. The bottom of the tank body is tapered and connected to the top wall of the sand collection box. A centrifuge tank includes a tank body and a tank top fixedly disposed on the tank body. The tank top is rotatably disposed on the top wall of a collection tank and is provided with a feed inlet. The tank body is fixedly connected to the tank top and is located inside the collection tank. At least a portion of the side wall of the tank body is provided with an array of filter holes. The bottom of the tank body is provided with a third opening, the height of which is higher than that of the second opening. The third opening is connected to the second opening through a first rotary joint. The drive mechanism is configured to drive the centrifuge tank to rotate, with the rotation axis perpendicular to the top wall of the collection tank.
[0007] In one possible implementation, a filter cake assembly is also included, which comprises: The filter cake chamber is equipped with a slag inlet, a slag outlet, and a liquid outlet. The slag outlet and the liquid outlet are both located at the bottom of the chamber. The slag inlet is located above the slag outlet and the liquid outlet and is lower than the second opening. The slag inlet is connected to the second opening. The slag outlet is connected to the sand collection box. The liquid outlet is connected to the water inlet pipe. A filter cake element, disposed inside the filter cake chamber, is used to at least partially separate solids and liquids. It divides the interior of the filter cake chamber into a filter cake cavity and a liquid discharge cavity, with the slag outlet connected to the filter cake cavity and the liquid outlet connected to the liquid discharge cavity.
[0008] In the above possible implementations, further, The filter cake component includes an installation column and a filter screen. One end of the installation column is fixed to the inner top wall of the filter cake chamber and is perpendicular to the inner top wall. The filter screen is spiral-shaped and wrapped around the installation column. Its inner edge is located on the outer side wall of the installation column, its outer edge is located on the inner side wall of the filter cake chamber, its upper edge is located below the slag inlet, and its lower edge is located between the slag outlet and the liquid outlet.
[0009] Furthermore, The slag inlet is set along the tangent of the outer wall of the filter cake chamber and is located on the upper part of the outer wall of the filter cake chamber.
[0010] In the above possible implementations, further, The outlet is connected to the throat, and the diameter of the outlet is larger than the diameter of the throat.
[0011] In the above possible implementations, further, It also includes a pressure stabilizing gas tank, the gas outlet pipe of which is connected to the top wall of the filter cake compartment.
[0012] In one possible implementation, It also includes a baffle, which is circumferentially arranged on the inner wall of the centrifuge tank. The cross-sectional shape of the baffle perpendicular to the tangent is an acute triangle, and the smallest interior angle of the acute triangle is far away from the inner wall of the centrifuge tank. Multiple baffles are arranged sequentially along the rotation axis of the centrifuge tank; The diameter of the filter pores located on the inner wall of the centrifuge tank is smaller than that located on the outer wall of the centrifuge tank.
[0013] In one possible implementation, the drive mechanism includes a drive motor, transmission gears, and a transmission belt, wherein: The drive motor is located outside the liquid collection tank. The output shaft of the drive motor is perpendicular to the rotation axis of the centrifuge tank. The output end of the output shaft is provided with a first transmission tooth along the circumference. The transmission gear is located on the outer top wall of the centrifuge tank and is coaxial with the rotation axis of the centrifuge tank; the feed inlet is located at the location of the transmission gear. The transmission belt is respectively fitted onto the output end of the output shaft and the transmission gear. The inner side of the transmission belt is provided with a second transmission tooth, which meshes with the first transmission tooth and the transmission gear respectively. It also includes a second rotary joint, which includes a second moving end and a second stationary end. The second moving end is coaxially mounted with the transmission gear at the feed inlet, and one end extends into the centrifuge tank. The other end is coaxially rotatably connected to one end of the second stationary end. The other end of the second stationary end is located outside the centrifuge tank, and this end extends out of the transmission gear and is connected to the feed pipe.
[0014] In one possible implementation, It also includes a spiral guide plate, which is set inside the liquid collection tank. Its outer edge is set on the inner side wall of the liquid collection tank, its upper edge is not lower than the uppermost filter hole on the side wall of the centrifuge tank, and its lower edge is not higher than the first opening.
[0015] In one possible implementation, The inlet pipe includes a small end and a large end. The diameter of the small end is smaller than that of the large end. One end of the small end is connected to the throat end, and the other end is connected to one end of the large end. The other end of the large end is installed in the tank body of the sand removal tank. From the small end to the large end, the connection between the small end and the large end expands in a conical shape; The length of the larger end is greater than the length of the smaller end.
[0016] The technical solution provided in this application has at least the following technical effects or advantages: (1) The condensate recovery device provided in this application uses a centrifuge tank installed inside the collection tank as the main solid-liquid separation and filtration device. It separates solid impurities from liquid condensate by centrifugation, and isolates solid impurities inside the centrifuge tank through filter holes on the side wall of the centrifuge tank for centralized treatment, thus avoiding secondary pollution of condensate after centrifugation. Compared with the currently commonly used booster pump system, it does not have the problem of solid-liquid mixtures and complex water bodies damaging the transmission and booster components, making it safer and more reliable to use, and with a longer effective life.
[0017] (2) The condensate recovery device provided in this application will fully throw water out of the centrifuge tank during rotation, ensuring solid-liquid separation efficiency; and even if solid impurities such as stones are accidentally stuck in the filter holes, these solid impurities will quickly detach from the filter holes under inertia when the centrifuge tank stops rotating, effectively avoiding filter hole blockage.
[0018] (3) The condensate recovery device provided in this application accelerates the tapered contraction connection between the drain end and the throat end in the drainage pipe. When the separated condensate enters the throat end from the drain end, the pipe diameter gradually changes, the flow cross-section shrinks, and the water flow velocity increases, which plays a role in promoting the flow of water. On this basis, combined with the internal negative pressure and external high pressure generated when the centrifuge tank rotates, it works synergistically with the pipeline structure to further promote the rapid flow of water. There is no need to set up a separate pressurization system and pumping system, which avoids the damage of water mixed with solid impurities to the pressurization system and pumping system from the source.
[0019] (4) The condensate recovery device provided in this application allows the water after initial separation and filtration to enter the sand removal tank tangentially through an accelerating diversion pipe. Under the guidance of the conical inner wall of the sand removal tank, a vortex is formed. In the vortex, solid impurities such as sand and iron filings with higher density will sink into the bottom sand collection box under the combined action of the vortex and gravity, while the water with lower density will rise upward under the action of the vortex and be discharged through the outlet pipe. Based on the removal of large solid impurities by the centrifuge tank, the subsequent sand removal tank performs a second separation process, which can further remove the remaining fine sand and other solid impurities in the water for subsequent recycling. The multiple separation processes further ensure the purification and recovery effect of the condensate. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the internal structure of the condensate recovery device provided in Example 1; Figure 2 This is a schematic diagram of the internal structure of the condensate recovery device provided in Example 2; Figure 3 This is an enlarged schematic diagram of the internal structure of the centrifuge tank combined with the first rotary joint and the second rotary joint in Example 2; Figure 4 This is a schematic diagram of the internal structure of the condensate recovery device provided in Example 3; Figure 5This is an enlarged schematic diagram of the internal structure of the combined filter cake chamber and sand removal tank in Example 3; Figure 6 This is a schematic diagram of the internal structure of the condensate recovery device provided in Example 4.
[0022] In the picture: 1-Collection tank; 2-Centrifuge tank; 3-Transmission gear; 4-Second rotary joint; 401-Second moving end; 402-Second stationary end; 5-Feed pipe; 6-Transmission belt; 7-Drive motor; 701-Output shaft; 8-First rotary joint; 801-First moving end; 802-First stationary end; 9-Bellwall; 10-Accelerating drainage pipe; 1001-Drainage end; 1002-Throat end; 11-Sand removal tank; 1101-Tank body; 1102-Sand collection box; 12-Water supply connector; 13-Filter cake chamber; 14-Filter cake component; 1401-Mounting column; 1402-Filter screen; 15-Pressure stabilizing tank; 16-Baffle; 17-Spiral guide plate. Detailed Implementation
[0023] The specific implementation of the present invention will now be described with reference to the accompanying drawings.
[0024] Example 1 This embodiment provides a condensate recovery device, such as... Figure 1 As shown, it includes: The liquid collecting tank 1 has a first opening and a second opening at its bottom. The first opening is located at the center of its bottom, and the second opening is close to the first opening. In this embodiment, the bottom of the liquid collecting tank 1 is preferably designed to be tapered and convex. Figure 1 As shown, the main purpose of this design is to facilitate the collection of water and ensure its complete drainage, and to have a flow-gathering effect. When the liquid flows from the bottom of the gradually narrowing collection tank 1 into the drain end 1001 of the accelerating drainage pipe 10, the flow velocity will increase due to the reduction of the flow cross-section, thereby increasing the initial velocity of the water entering the accelerating drainage pipe 10. The accelerated drainage tube 10 includes a drain end 1001 and a throat end 1002. One end of the drain end 1001 is connected to a first opening, and the other end is connected to one end of the throat end 1002. The diameter of the drain end 1001 is larger than the diameter of the throat end 1002. From the drain end 1001 to the throat end 1002, the connection between the drain end 1001 and the throat end 1002 forms a tapered contraction. Figure 1As shown; In this embodiment, the drain end 1001 and the throat end 1002 in the accelerating drainage pipe 10 are connected in a conical contraction. When the separated condensate enters the throat end 1002 from the drain end 1001, the pipe diameter gradually changes, the flow cross-section shrinks, and the water flow velocity increases, which plays a role in promoting the flow of water. On this basis, combined with the bottom of the conical contraction and protrusion of the liquid collection tank 1 mentioned above, the water flow speed can be further accelerated, realizing the effect that the water can still flow quickly and smoothly without the need for pressurization equipment and pumping equipment. Except for the sand tank 11, which includes a tank body 1101 and a sand collection box 1102, the sand collection box 1102 is located below the tank body 1101. A water inlet pipe is provided along the tangent of the upper side wall of the tank body 1101, and the water inlet pipe is connected to the other end of the throat end 1002. A water outlet pipe is provided at the top of the tank body 1101, and the water outlet pipe is connected to a water supply connector 12. The bottom of the tank body 1101 tapers and is connected to the top wall of the sand collection box 1102. Figure 1 As shown; in this embodiment, the water after preliminary separation and filtration enters the sand removal tank 11 tangentially through the acceleration diversion pipe 10. Under the guidance of the conical inner wall of the sand removal tank 11, a vortex is formed. In the vortex, solid impurities such as sand and iron filings with higher density will sink into the bottom sand collection box 1102 under the combined action of the vortex and gravity, while the water with lower density will be lifted upward under the action of the vortex and discharged through the water outlet pipe, and then enter the water-using equipment such as the condensate circulation equipment through the water supply connector 12. In this embodiment, after large solid particles are removed by centrifuge tank 2, a second separation process is carried out by subsequent sand removal tank 11. This process can further remove residual fine sand and other solid impurities in the water for subsequent recycling. The multiple separation processes further ensure the purification and recovery effect of the condensate. The purpose of setting the water inlet pipe along the tangential direction of the side wall of tank 1101 is mainly to: first, adjust and stabilize the flow rate and direction of the water when it enters, and reduce the influence of turbulence on the swirling of the water in tank 1101; second, the water enters the interior of tank 1101 tangentially, which can effectively form a swirling flow and ensure the effect of sand removal. In addition, in order to improve airtightness and stabilize the internal pressure of the device to further improve the working efficiency and effect of the acceleration drain pipe 10, this embodiment more preferably uses a water supply connector 12 equipped with an airtight valve to connect to the external water system. Centrifuge tank 2 includes a tank body and a tank top fixedly mounted on the tank body. The tank top is rotatably mounted on the top wall of the collection tank 1 and has a feed inlet. The tank body is fixedly connected to the tank top and located inside the collection tank 1. At least a portion of the side wall of the tank body is provided with an array of filter holes. A third opening is provided at the bottom of the tank body, the height of which is higher than that of the second opening. The third opening is connected to the second opening through a first rotary joint 8. In this embodiment, centrifuge tank 2, located inside the collection tank 1, is used as the main solid-liquid separation and filtration device. Solid impurities and liquid condensate are separated by centrifugation, and the solid impurities are isolated inside the centrifuge tank 2 through the filter holes on the side wall for centralized processing, avoiding cross-contamination. After centrifugation, secondary pollution occurs to the condensate. Compared with the currently used booster pump system, there is no damage to the transmission and booster components caused by solid-liquid mixtures and complex water composition. It is safer and more reliable to use and has a longer effective life. In this embodiment, the bottom of the centrifuge tank 2 is preferably set to a conical shape that tapers and protrudes, and its taper is greater than that of the bottom of the collection tank 1. The main purpose is to: firstly, gather the separated solid impurities for full discharge, and secondly, make the volume of the collection cavity formed between the centrifuge tank 2 and the inner wall of the collection tank 1 smaller as it gets closer to the bottom first outlet of the collection tank 1, which can help increase the flow rate of the water in the collection tank 1. In this embodiment, the third opening and the second opening are connected by a first rotary joint 8, which facilitates real-time slag discharge during equipment operation without affecting operation. The first rotary joint 8 used is a common rotary joint on the market, which includes a first stationary end 802 and a first moving end 801. One end of the first stationary end 802 is connected to the third opening at the bottom of the centrifuge tank 2, and the other end is connected to one end of the first moving end 801. The other end of the first moving end 801 is connected to the second opening through a bellows 9. When it is necessary to discharge solid impurities isolated inside the centrifuge tank 2, they are discharged through the second interface. The purpose of using a bellows 9 instead of a rigid pipe is mainly to absorb the vibration transmitted from the first rotary joint 8 to the pipe during the rotation of the centrifuge tank 2, and to avoid long-term high-frequency vibration causing damage to the pipe and its connection. The drive mechanism is configured to drive the centrifuge tank 2 to rotate, with the rotation axis perpendicular to the top wall of the collection tank 1.
[0025] In this embodiment, preferably, the inlet pipe of the sand removal tank 11 includes a small end and a large end, the diameter of the small end is smaller than the diameter of the large end, one end of the small end is connected to the throat end 1002, and the other end is connected to one end of the large end, the other end of the large end is disposed in the tank body 1101 of the sand removal tank 11; from the small end to the large end, the connection between the small end and the large end is tapered; the length of the large end is greater than the length of the small end. Figure 1 As shown.
[0026] The main purpose of this design is as follows: As mentioned earlier, the water flow velocity in the throat 1002 is relatively high. In addition, when the water enters the tank, the cross-sectional area of the water flow suddenly increases, which may cause excessive turbulence and water spraying in all directions. This is not conducive to the formation of a stable vortex in the tank. Therefore, by connecting the throat 1002 to the inlet pipe with a larger diameter in a conical shape, the conical connection area and the inlet pipe with a larger and consistent diameter can slow down and stabilize the flow velocity of the water. Without significantly affecting the water flow velocity, this is more conducive to the formation and maintenance of the vortex in the sand removal tank 11, thereby ensuring the solid-liquid separation and sand removal effect.
[0027] In this embodiment, preferably, the driving mechanism specifically includes a drive motor 7, a transmission gear 3, and a transmission belt 6, such as... Figure 1 As shown, where: The drive motor 7 is located outside the liquid collection tank 1. The output shaft 701 of the drive motor 7 is arranged perpendicular to the rotation axis of the centrifuge tank 2. The output end of the output shaft 701 is provided with a first transmission tooth along the circumferential direction. The transmission gear 3 is located on the outer top wall of the centrifuge tank 2 and is coaxial with the rotation axis of the centrifuge tank 2; the feed inlet is located at the position of the transmission gear 3. The transmission belt 6 is respectively sleeved on the output end of the output shaft 701 and the transmission gear 3. The inner side of the transmission belt 6 is provided with a second transmission tooth, which meshes with the first transmission tooth and the transmission gear 3 respectively. It also includes a second rotary joint 4, which includes a second moving end 401 and a second stationary end 402. The second moving end 401 is coaxially mounted with the transmission gear 3 at the feed inlet, and one end extends into the centrifuge tank 2. The other end is coaxially rotatably connected to one end of the second stationary end 402. The other end of the second stationary end 402 is located outside the centrifuge tank 2, and this end extends out of the transmission gear 3 and is connected to the feed pipe 5.
[0028] Specifically, this embodiment uses an external side-mounted motor instead of the bottom-mounted motor commonly found in existing centrifuge equipment. This design is more suitable for the structure of each component in this embodiment and facilitates the arrangement of the first opening, second opening, and third opening. In this embodiment, the feed pipe 5 is connected via a second rotary joint 4, and the transmission gear 3, the second rotary joint 4, and the top of the collection tank 1 are integrated into one unit. This effectively reduces the space occupied by the equipment. Furthermore, the second rotary joint 4 is located at the center of rotation, with the second moving end 401 rotating with the centrifuge tank 2, while the second stationary end 402 is connected to the feed pipe 5 and remains stationary during rotation. This facilitates continuous feeding during equipment operation.
[0029] In this embodiment, preferably, a spiral guide plate 17 is also included, which is disposed inside the collection tank 1. Its outer edge is disposed on the inner side wall of the collection tank 1, its upper edge is not lower than the uppermost filter hole on the side wall of the centrifuge tank 2, and its lower edge is not higher than the first opening. Figure 1 As shown.
[0030] Specifically, in this embodiment, a spiral guide plate 17 is preferably provided. After the water is thrown out of the centrifuge tank 2, the spiral guide plate 17 can fully collect the water and guide it to the first opening. The water spirals down with the spiral guide plate 17, which can also increase its flow rate when entering the first opening.
[0031] Example 2 This embodiment provides a condensate recovery device, the structure of which is basically the same as that of Embodiment 1; such as Figure 2 , 3 As shown, its main difference from Example 1 is: It also includes a baffle 16, which is circumferentially disposed on the inner wall of the centrifuge tank 2. The cross-sectional shape of the baffle 16 perpendicular to the tangent is an acute triangle, and the smallest end of the acute triangle is far away from the inner wall of the centrifuge tank 2. Multiple baffles 16 are arranged sequentially along the rotation axis of the centrifuge tank 2; The diameter of the filter holes located on the inner wall of centrifuge tank 2 is smaller than the diameter of the filter holes located on the outer wall of centrifuge tank 2.
[0032] Specifically, during the operation of centrifuge tank 2, when solid impurities are flung to the side wall of centrifuge tank 2 under centrifugal force, the triangular or wedge-shaped baffle 16 blocks the solid impurities. Its protruding and sharp edges directly crush or repel some of the solid impurities, while some solid impurities that are not repelled by the edge of baffle 16 or do not directly collide with the edge of baffle 16 will slide off and be flung away under the guidance of the slopes on both sides of the edge of baffle 16. This further reduces filter pore clogging and improves centrifugal separation filtration efficiency.
[0033] Example 3 This embodiment provides a condensate recovery device, the structure of which is basically the same as that of Embodiment 2; such as Figure 4 , 5 As shown, the main difference between it and Example 2 is: It also includes filter cake components, such as Figure 4 , 5 As shown, the filter cake assembly includes: The filter cake chamber 13 is provided with a slag inlet, a slag outlet, and a liquid outlet. The slag outlet and the liquid outlet are both located at its bottom. The slag inlet is located above the slag outlet and the liquid outlet and is lower than the second opening. The slag inlet is connected to the second opening. The slag outlet is connected to the sand collection box 1102. The liquid outlet is connected to the water inlet pipe. In this embodiment, the bottom of the filter cake chamber 13 is also designed as a conical, tapered, and protruding structure to facilitate the separate collection of solid impurities and filtered liquid. The filter cake element 14 is disposed inside the filter cake chamber 13 and is used to at least partially separate solids and liquids. It divides the interior of the filter cake chamber 13 into a filter cake cavity and a liquid discharge cavity. The slag outlet is connected to the filter cake cavity, and the liquid outlet is connected to the liquid discharge cavity.
[0034] In Examples 1 and 2, the solid impurities separated and filtered from the centrifuge tank 2 are discharged through the third opening. However, in practical applications, the discharged solid impurities are complex in composition and still have a high water content. If the solid impurities discharged from this device are not further processed, it will easily pollute the environment and waste water resources. In this example, a filter cake chamber 13 is added to the third opening. After the water-containing solid impurities are discharged from the third opening, they enter the filter cake chamber 13. In the filter cake chamber 13, the residual water in the solid impurities is filtered out by the filter cake element 14 and flows into the drain chamber and then into the water inlet pipe of the sand removal tank 11 through the outlet. Together with the water filtered from the collection tank 1, the solid impurities undergo solid-liquid separation and sand removal in the sand removal tank 11. After being fully dehydrated, the solid impurities isolated by the filter cake element 14 are discharged from the slag outlet into the sand collection box 1102 of the sand removal tank 11 in the filter cake chamber, and collected together with the remaining solid impurities that have settled after solid-liquid separation for subsequent discharge treatment.
[0035] This embodiment uses a fake filter assembly to further dehydrate the solid impurities filtered by centrifugation, and collects them together with the residual solid impurities in the water settled in the sand removal tank 11. This efficient centralized sewage discharge saves a lot of water resources for subsequent recycling.
[0036] In practical applications, the filter cake component 14 can take many forms. For example, a planar filter screen 1402 can be inclinedly arranged inside the filter cake chamber 13. The upper edge of the filter screen 1402 is located below the slag inlet, and the lower edge is located between the slag outlet and the liquid outlet. The space above the planar filter screen 1402 in the filter cake chamber 13 is the filter cake cavity, and the space below the planar filter screen 1402 is the liquid discharge cavity. After water-containing solid impurities are introduced through the slag inlet, the residual water in the solid impurities is filtered by the filter screen 1402 and leaks into the liquid discharge cavity below the filter screen 1402, and is discharged from the liquid outlet. The dehydrated solid impurities that cannot pass through the filter screen 1402 are retained in the filter cake cavity by the filter screen 1402. Under the action of gravity, these solid impurities slide down the inclined surface formed by the filter screen 1402 to the slag outlet and are discharged. Specifically, in this embodiment, preferably, the filter cake component 14 includes a mounting column 1401 and a filter screen 1402. One end of the mounting column 1401 is fixedly disposed on the inner top wall of the filter cake chamber 13 and is perpendicular to the inner top wall. The filter screen 1402 is spiral and is wound around the mounting column 1401. Its inner edge is disposed on the outer side wall of the mounting column 1401, its outer edge is disposed on the inner side wall of the filter cake chamber 13, its upper edge is disposed below the slag inlet, and its lower edge is disposed between the slag outlet and the liquid outlet.
[0037] In a preferred embodiment, a spiral filter screen 1402 is provided, which is wound around the mounting post 1401 and spirally descends. The two together form the filter cake 14. Figure 4 , 5 As shown. This preferred configuration serves two purposes: firstly, it increases the distance that water-containing solid impurities travel, allowing for more thorough filtration of water during downward flow or sliding; secondly, after the water-containing solid impurities are discharged into the filter cake chamber 13, some of the water will fall straight down near the inlet, passing through multiple layers of filter screen 1402, thus improving the filtration effect of internal impurities. The remaining water will propel the solid impurities spirally downwards along the filter screen 1402 for a distance. During this process, the solid impurities slide down more smoothly propelled by the water, and the path of the water flowing through the filter screen 1402 is also longer, resulting in more thorough solid-liquid separation and achieving a mutually reinforcing effect.
[0038] Based on the above preferred embodiment, further, the slag inlet is arranged tangentially to the outer wall of the filter cake chamber 13, and is located at the upper part of the outer wall of the filter cake chamber 13, such as... Figure 4 , 5 As shown.
[0039] Specifically, this design allows water-containing solid impurities to have a certain angular velocity when entering the filter cake chamber 13, forming a swirling flow within the chamber. Combined with the guiding effect of the spiral filter screen 1402, this can flush away solid impurities on the filter screen 1402 during the filtration process. On the one hand, this promotes the full discharge of solid impurities from the slag outlet, and on the other hand, it effectively prevents solid impurities from caking and solidifying on the filter screen 1402, thus affecting the filtration effect.
[0040] In a preferred embodiment, the outlet is connected to the throat 1002, and the diameter of the outlet is larger than the diameter of the throat 1002, such as... Figure 4 As shown.
[0041] Specifically, on the one hand, connecting the outlet to the throat 1002 allows the filtered water to enter the sand removal tank 11 together with the water inside the throat 1002, forming a vortex. The two streams of water are fully mixed and their flow rates are consistent before entering the sand removal tank 11, which can form a more stable vortex in the sand removal tank 11, thereby further ensuring the sedimentation and sand removal effect. On the other hand, as mentioned above, when the liquid in the acceleration drainage pipe 10 enters the throat 1002 from the drainage end 1001, the water velocity increases due to the smaller flow cross-section. The increased water velocity will cause the internal pressure of the throat 1002 to decrease, forming a negative pressure, which will have a suction effect on the water from the outlet. Based on this, setting the diameter of the outlet to be larger than the diameter of the throat 1002 can further increase the pressure difference between the outlet and the throat 1002, thereby promoting the emptying of the water in the filter cake chamber 13 and improving the filter cake efficiency and drainage efficiency.
[0042] Example 4 This embodiment provides a condensate recovery device, the structure of which is basically the same as that of Embodiment 3; such as Figure 6 As shown, the main difference between it and Example 3 is: It also includes a pressure-stabilizing gas tank 15, whose outlet pipe is connected to the top wall of the filter cake compartment 13.
[0043] Specifically, the pressure stabilizing gas tank 15 used in this embodiment is a gas storage tank connected to the filter cake chamber 13. When water flows in the acceleration diversion pipe 10, water in the filter cake chamber 13 is drawn into the throat 1002 of the acceleration diversion pipe 10, or when the internal air pressure of the device fluctuates due to various other reasons, the pressure stabilizing gas tank 15 can replenish the pressure inside the device through the filter cake chamber 13 to ensure the operational stability of the acceleration diversion pipe 10 and the various parts and pipelines inside the device.
[0044] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.
Claims
1. A condensate recovery device, characterized in that, include: The liquid collection tank (1) has a first opening and a second opening at its bottom. The first opening is located at the center of its bottom, and the second opening is close to the first opening. The accelerated drainage tube (10) includes a drain end (1001) and a throat end (1002). One end of the drain end (1001) is connected to the first opening, and the other end is connected to one end of the throat end (1002). The diameter of the drain end (1001) is larger than the diameter of the throat end (1002). From the drain end (1001) to the throat end (1002), the connection between the drain end (1001) and the throat end (1002) is tapered. A sand removal tank (11) includes a tank body (1101) and a sand collection box (1102). The sand collection box (1102) is located below the tank body (1101). A water inlet pipe is provided on the upper side wall of the tank body (1101) along the tangential direction of the side wall of the tank body (1101). The water inlet pipe is connected to the other end of the throat end (1002). A water outlet pipe is provided on the top of the tank body (1101). The bottom of the tank body (1101) is tapered and connected to the top wall of the sand collection box (1102). Centrifuge tank (2), which includes a tank body and a tank top fixedly disposed on the tank body. The tank top is rotatably disposed on the top wall of the liquid collection tank (1) and is provided with a feed inlet. The tank body is fixedly connected to the tank top and is located inside the liquid collection tank (1). At least a portion of the side wall of the tank body is provided with an array of filter holes. The bottom of the tank body is provided with a third opening. The height of the third opening is higher than that of the second opening. The third opening is connected to the second opening through a first rotary joint (8). A drive mechanism configured to drive the centrifuge tank (2) to rotate, with the rotation axis perpendicular to the top wall of the collection tank (1).
2. The condensate recovery device according to claim 1, characterized in that, It also includes a filter cake assembly, the filter cake assembly comprising: The filter cake chamber (13) is provided with a slag inlet, a slag outlet and a liquid outlet. The slag outlet and the liquid outlet are both located at its bottom. The slag inlet is located above the slag outlet and the liquid outlet and is lower than the second opening. The slag inlet is connected to the second opening. The slag outlet is connected to the sand collection box (1102). The liquid outlet is connected to the water inlet pipe. A filter cake component (14) is disposed inside the filter cake chamber (13) for at least partially separating solids and liquids. It divides the interior of the filter cake chamber (13) into a filter cake cavity and a liquid discharge cavity. The slag outlet is connected to the filter cake cavity, and the liquid outlet is connected to the liquid discharge cavity.
3. The condensate recovery device according to claim 2, characterized in that, The filter cake component (14) includes a mounting column (1401) and a filter screen (1402). One end of the mounting column (1401) is fixedly disposed on the inner top wall of the filter cake chamber (13) and perpendicular to the inner top wall. The filter screen (1402) is spiral and wound around the mounting column (1401). Its inner edge is disposed on the outer side wall of the mounting column (1401), its outer edge is disposed on the inner side wall of the filter cake chamber (13), its upper edge is disposed below the slag inlet, and its lower edge is disposed between the slag outlet and the liquid outlet.
4. A condensate recovery device according to claim 3, characterized in that, The slag inlet is arranged along the tangential direction of the outer side wall of the filter slag chamber (13) and is located on the upper part of the outer side wall of the filter slag chamber (13).
5. A condensate recovery device according to claim 2, characterized in that, The outlet is connected to the throat (1002), and the diameter of the outlet is larger than the diameter of the throat (1002).
6. A condensate recovery device according to claim 2, characterized in that, It also includes a pressure stabilizing gas tank (15), the gas outlet pipe of which is connected to the top wall of the filter cake chamber (13).
7. A condensate recovery device according to claim 1, characterized in that, It also includes a baffle (16), which is circumferentially disposed on the inner wall of the centrifuge tank (2). The cross-sectional shape of the baffle (16) perpendicular to the tangent is an acute triangle, and the smallest end of the acute triangle is far away from the inner wall of the centrifuge tank (2). The multiple baffles (16) are arranged sequentially along the rotation axis of the centrifuge tank (2); The diameter of the filter hole located on the inner side wall of the centrifuge tank (2) is smaller than the diameter of the filter hole located on the outer side wall of the centrifuge tank (2).
8. A condensate recovery device according to claim 1, characterized in that, The drive mechanism includes a drive motor (7), a transmission gear (3), and a transmission belt (6), wherein: The drive motor (7) is located outside the liquid collection tank (1). The output shaft (701) of the drive motor (7) is perpendicular to the rotation axis of the centrifuge tank (2). The output end of the output shaft (701) is provided with a first transmission tooth along the circumferential direction. The transmission gear (3) is located on the outer top wall of the centrifuge tank (2) and is coaxial with the rotation axis of the centrifuge tank (2); the feed inlet is located at the position of the transmission gear (3); The transmission belt (6) is respectively sleeved on the output end of the output shaft (701) and the transmission gear (3). The inner side of the transmission belt (6) is provided with a second transmission tooth, which meshes with the first transmission tooth and the transmission gear (3) respectively. It also includes a second rotary joint (4), which includes a second moving end (401) and a second stationary end (402). The second moving end (401) is coaxially mounted with the transmission gear (3) at the feed inlet, and one end extends into the centrifuge tank (2). The other end is coaxially rotatably connected to one end of the second stationary end (402). The other end of the second stationary end (402) is located outside the centrifuge tank (2), and this end extends out of the transmission gear (3) and is connected to the feed pipe (5).
9. A condensate recovery device according to claim 1, characterized in that, It also includes a spiral guide plate (17), which is disposed inside the liquid collection tank (1), with its outer edge disposed on the inner side wall of the liquid collection tank (1), its upper edge not lower than the uppermost filter hole on the side wall of the centrifuge tank (2), and its lower edge not higher than the first opening.
10. A condensate recovery device according to claim 1, characterized in that, The water inlet pipe includes a small end and a large end. The diameter of the small end is smaller than that of the large end. One end of the small end is connected to the throat end (1002), and the other end is connected to one end of the large end. The other end of the large end is located in the tank body (1101) of the sand removal tank (11). From the small end to the large end, the connection between the small end and the large end is tapered and expands. The length of the larger end is greater than the length of the smaller end.