Low-temperature multi-effect seawater distillation system convenient to overhaul
By adopting a detachable cover and connecting plate design in the low-temperature multi-effect distillation seawater system, the problem of difficult evaporator cleaning is solved, convenient maintenance and cleaning are achieved, and the system's operating stability and heat transfer efficiency are improved.
Patent Information
- Application Number
- CN202422812562.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-19
AI Technical Summary
The evaporator or tank in the existing low-temperature multi-effect distillation seawater system is difficult to clean, which affects the heat transfer performance and stable operation of the system, and there is also the problem of difficulty in disassembly.
It adopts a detachable sealing structure and connecting plate design. The steam heat exchange tubes are connected through the connecting plate, which is convenient for disassembly and cleaning. An observation window is provided in the tank body to facilitate internal inspection and cleaning.
It realizes convenient maintenance and cleaning, reduces the difficulty of disassembly, improves the operating stability and heat transfer efficiency of the system, and ensures the safety of operators.
Smart Images
Figure CN223422422U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a distillation seawater system, more specifically, to a low-temperature multi-effect distillation seawater system convenient to overhaul, belong to power plant and seawater purification treatment technical field. BACKGROUND
[0002] Low-temperature multi-effect distillation seawater system is a kind of high-efficiency seawater desalination technology, its core principle is to use vacuum pump or steam ejector to extract the air inside the closed equipment, reduce internal air pressure, make seawater evaporate in the environment below 70 DEG C.This technology is by a series of horizontal tube or vertical tube falling film evaporator in series, with a certain amount of steam input is evaporated and condensed multiple times, finally get multiple times steam quantity of distilled water.This process is similar to the "boiling effect" in life, i.e. water vapor in the closed space gathers, when temperature difference reaches a certain degree, will form condensation water flow down, these water is distilled water.
[0003] In low-temperature multi-effect distillation seawater system, raw seawater enters the first evaporator (the application records as tank body) after pretreatment, part of seawater evaporates there, and the remaining seawater concentration increases and is sent to the next evaporator. With the continuous evaporation process, the evaporation temperature of each effect will be lower than the previous one, so that more pure distilled water is obtained. The whole system not only reduces the operating temperature, reduces the possibility of fouling, but also improves the distillation efficiency.
[0004] But the evaporator or tank body still needs regular cleaning, the reason is:
[0005] Improve heat transfer performance: since the thermal conductivity of dirt is extremely small, fouling will seriously affect the heat transfer performance of seawater desalination evaporator heat exchange tube, resulting in a substantial reduction in water production ratio. Preventing under-deposit corrosion: fouling not only reduces heat transfer efficiency, but also may cause under-deposit corrosion, leading to heat exchange tube perforation leakage, thereby affecting the quality of desalinated water. Maintain normal operation of the system: regular cleaning of the evaporator can ensure long-term stable operation of the system, avoid system failure or shutdown due to fouling.
[0006] But the structure of the current evaporator or tank body will cause cleaning difficulty: 1) each heat exchange tube adopts a separate installation method, which needs to be disassembled single by single, causing great difficulty in installation and disassembly, long time consumption; the structure is relatively integrated, difficult to disassemble, and the operator is not easy to enter the evaporator or tank body for cleaning. UTILITY MODEL CONTENTS
[0007] In order to solve the above technical problems of the prior art, the utility model provides a low-temperature multi-effect distillation seawater system convenient to overhaul, which has the technical characteristics of simple structure, convenient disassembly, overhaul and cleaning, and is suitable for popularization and use.
[0008] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:
[0009] The utility model discloses a low-temperature multi-effect seawater distillation system with convenient maintenance, comprising a plurality of distillation units connected in series, wherein the distillation unit comprises a tank body, the tank body comprising a middle cylinder body and a left cover body and a right cover body detachably covering the two ends of the middle cylinder body, the top of the middle cylinder body is connected to a seawater pipe, and the bottom of the middle cylinder body is connected to a brine pipe;
[0010] The left cover body and the middle cylinder body, and the right cover body and the middle cylinder body are isolated by a No. 1 circular baffle and a No. 2 circular baffle. A plurality of through holes are provided on the two baffles, and the through holes on the two baffles correspond to each other. A steam hood is provided in the right cover body, and the steam hood is communicated with the outside through a pipeline. The steam hood is sealed and covered on all the through holes on the No. 2 circular baffle. A connecting plate is also included, and a plurality of steam heat exchange pipes are passed through and connected to the connecting plate. The steam heat exchange pipes can be respectively inserted into the through holes on the baffles. By sequentially inserting the plurality of steam heat exchange pipes into the through holes on the No. 1 circular baffle and the No. 2 circular baffle, communication between the left cover body and the steam hood can be achieved.
[0011] The second circular baffle is provided with a secondary steam port, which is communicated with the left cover body on the next distillation unit through the outlet of the right cover body.
[0012] Preferably, the connecting plate is a circular connecting plate, and is the same size as the first circular baffle so that the two can fit perfectly together. The central cylinder is provided with an observation window, and a magnetic wiper is attached to the inner wall of the observation window. A movable block is provided outside the observation window, which is magnetically connected to the magnetic wiper, and the magnetic wiper moves when the movable block is moved.
[0013] Preferably, the connecting plate is attached to the left end surface of the No. 1 circular baffle and is fixed by bolts and nuts.
[0014] Preferably, a sealing gasket is provided between the connecting plate and the first circular baffle.
[0015] Preferably, the left cover body is connected to a steam pipe, which includes a longitudinal pipe and a transverse pipe. The transverse pipe is connected to the left cover body, and the longitudinal pipe is connected to at least one drainage fan to quickly introduce the hot steam in the steam pipe into the left cover body at the far left end.
[0016] Preferably, the exhaust fan is sealed and connected to the longitudinal tube via a flange.
[0017] Preferably, a jet disk is connected to the middle cylinder, the seawater pipe and the jet disk are connected by a flange seal, the jet disk outlet faces downward and the outlet is detachably sealed and connected to a bottom plate, and the bottom plate is provided with a plurality of water outlets.
[0018] Preferably, the bottom plate is embedded in the outlet of the spray disc and a sealing ring is arranged around the bottom plate and the outlet of the spray disc.
[0019] Preferably, the base plate and the spray disc are connected via a lock;
[0020] The left cover body and the right cover body are connected to the middle cylinder body through bolts and nuts.
[0021] Preferably, the secondary steam port located in the right cover body is connected to an arc-shaped tube, and the lower end of the arc-shaped tube is arranged toward the outlet of the right cover body.
[0022] Beneficial effects: simple structure, easy installation and disassembly, reducing the difficulty of regular disassembly; convenient for operators to flush and clean the tank body; an observation window is provided in the tank body for observing the internal situation. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0024] Figure 2 It is a schematic diagram of the connection between the connecting plate and the steam heat exchange tube of the utility model.
[0025] Figure 3 It is a structural schematic diagram of the second circular baffle of the utility model. DETAILED DESCRIPTION
[0026] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.
[0027] like Figure 1-3 The figure shows a specific embodiment of a low-temperature, multi-effect seawater distillation system that is easy to maintain. This embodiment provides a low-temperature, multi-effect seawater distillation system that is easy to maintain, including a plurality of distillation units 1 connected in series. The distillation unit 1 includes a tank body, which includes a central cylinder 2 and a left cover 3 and a right cover 4 that are detachably sealed at both ends of the central cylinder 2. The top of the central cylinder 2 is connected to a seawater pipe 14, and the bottom of the central cylinder 2 is connected to a brine pipe.
[0028] The left cover body 3 and the middle cylinder body 2, and the right cover body 4 and the middle cylinder body 2 are isolated by a No. 1 circular baffle 5 and a No. 2 circular baffle 6. A plurality of through holes 7 are provided on the two baffles, and the through holes 7 on the two baffles correspond one to one. A steam cover 8 is provided in the right cover body 4, and the steam cover 8 is communicated with the outside through a pipeline. The steam cover 8 is sealed and covered on all the through holes 7 on the No. 2 circular baffle 6; it also includes a connecting plate 9, and a plurality of steam heat exchange pipes 10 are passed through and connected to the connecting plate 9. The steam heat exchange pipes 10 can be respectively inserted into the through holes 7 on the baffles. By sequentially inserting the plurality of steam heat exchange pipes 10 into the through holes 7 on the No. 1 circular baffle 5 and the No. 2 circular baffle 6, the left cover body 3 and the steam cover 8 can be connected.
[0029] The second circular baffle 6 is provided with a secondary steam port 11 , which is communicated with the left cover 3 on the next distillation unit 1 through the outlet of the right cover 4 .
[0030] Cleaning and disassembly method: Separate the middle cylinder 2, the left cover 3, and the right cover 4, and remove the connecting plate 9 from the through hole 7 of the two baffles through the lifting equipment. Since the steam heat exchange tubes 10 are all connected to the connecting plate 9, the steam heat exchange tubes 10 can be directly removed at one time, and then the connecting plate 9 and the steam heat exchange tubes 10 are placed in a safe and well-lit environment for physical and / or chemical cleaning to ensure the safety of the operator (at this time, you can directly replace and hoist a cleaned connecting plate 9 and steam heat exchange tube 10 and install it directly for use). When it is found that a certain steam heat exchange tube 10 is not working properly, it can be replaced separately. After the connecting plate 9 and the steam heat exchange tube 10 are disassembled together, the operator can easily enter the middle cylinder 2, deal with the dirt and the like at the bottom of the middle cylinder 2, and check whether there is any damage or rust, and deal with it in time. The spray disc 15 can be disassembled and cleaned. The connection method of the connecting plate 9 and the steam heat exchange pipe 10 makes the structure simple, the installation and disassembly convenient, and reduces the difficulty of regular disassembly; it can facilitate the operator to flush and clean the tank body.
[0031] The technical principle of this application is as follows: the steam in the steam pipe 12 will enter the left cover 3, and then enter the steam cover 8 through several steam heat exchange tubes 10 and be discharged. Since the seawater will enter the middle cylinder 2 through the jet disk 15 and contact the steam heat exchange tube 10 to achieve heat exchange, part of the seawater will be distilled into steam, and the seawater that falls to the bottom of the middle cylinder 2 will become brine and be discharged, while the part of the seawater that becomes steam will pass through the secondary steam port 11 as hot steam into the left cover 3 of the next distillation unit 1, and this will be repeated. Ultimately, multiple evaporation and condensation are achieved with a certain amount of steam input, and finally distilled water that is several times the amount of steam is obtained. It should be noted that the current technology uses a vacuum pump or a steam ejector to extract the air inside the closed tank, reduce the internal air pressure, and allow the seawater to evaporate in an environment below 70°C. This belongs to the existing technology and will not be described in detail.
[0032] In a preferred embodiment, the connecting plate 9 is a circular connecting plate and is the same size as the first circular baffle 5 so that the two can fit perfectly together. The central cylinder 2 is provided with an observation window, the inner wall of which is affixed to a magnetic wiper. A movable block is provided on the outside of the observation window, which is magnetically connected to the magnetic wiper. By moving the movable block, the magnetic wiper moves, thereby preventing internal fog from affecting the observation window.
[0033] In a preferred embodiment, the connecting plate 9 is attached to the left end surface of the No. 1 circular baffle 5 and fixed by bolts and nuts. The installation and fixing structure is simple and practical.
[0034] In a preferred embodiment, a sealing gasket is provided between the connecting plate 9 and the first circular baffle 5 to improve the sealing effect and prevent steam from directly entering the middle cylinder 2 through the gap.
[0035] In a preferred embodiment, a steam pipe 12 is connected to the left cover body 3, and the steam pipe 12 includes a longitudinal pipe and a transverse pipe. The transverse pipe is connected to the left cover body 3, and at least one drainage fan 13 is connected to the longitudinal pipe to quickly introduce the hot steam in the steam pipe 12 into the left cover body 3 at the leftmost end.
[0036] In a preferred embodiment, the exhaust fan 13 is sealed and connected to the longitudinal tube via a flange, which has a simple structure and is easy to disassemble, install, repair and replace.
[0037] In a preferred embodiment, a jet disk 15 is connected to the middle cylinder 2, and the seawater pipe 14 is connected to the jet disk 15 through a flange seal. The outlet of the jet disk 15 faces downward and is detachably sealed with a bottom plate 16 at the outlet, and a plurality of water outlets are provided on the bottom plate 16.
[0038] In a preferred embodiment, the bottom plate 16 is embedded in the outlet of the jet disc 15 and a sealing ring is formed between the bottom plate 16 and the outlet of the jet disc 15 to improve the sealing performance. At the same time, a multi-layer filter structure can be installed in the jet disc 15. The current technology mainly installs a filter element structure at the initial position where seawater enters the system.
[0039] In a preferred embodiment, the bottom plate 16 and the spray disc 15 are connected by a lock;
[0040] The left cover body 3 and the right cover body 4 are connected to the middle cylinder body 2 by bolts and nuts, and have a simple structure and strong practicality.
[0041] In a preferred embodiment, the secondary steam port 11 in the right cover 4 is connected to an arc tube, and the lower end of the arc tube is arranged toward the outlet of the right cover 4 to facilitate the atomized seawater vapor to enter the next distillation unit 1.
[0042] Finally, it should be noted that the present invention is not limited to the above embodiments and may be subject to many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered to be within the scope of protection of the present invention.
Claims
1. A low-temperature multi-effect seawater distillation system with convenient maintenance, comprising a plurality of distillation units (1) connected in series, characterized in that: The distillation unit (1) comprises a tank body, which comprises a middle cylinder (2) and a left cover (3) and a right cover (4) detachably covering both ends of the middle cylinder (2); the top of the middle cylinder (2) is connected to a seawater pipe (14), and the bottom of the middle cylinder (2) is connected to a brine pipe; The left cover body (3) and the middle cylinder body (2), and the right cover body (4) and the middle cylinder body (2) are isolated by a first circular baffle (5) and a second circular baffle (6). A plurality of through holes (7) are provided on the two baffles, and the through holes (7) on the two baffles correspond to each other. A steam cover (8) is provided in the right cover body (4). The steam cover (8) is communicated with the outside through a pipeline. The steam cover (8) is sealed and covered on all the through holes (7) on the second circular baffle (6). The left cover body (3) and the steam cover (8) are also included. A plurality of steam heat exchange pipes (10) are passed through and connected to the connecting plate (9). The steam heat exchange pipes (10) can be respectively inserted into the through holes (7) on the baffles. By sequentially inserting the plurality of steam heat exchange pipes (10) into the through holes (7) on the first circular baffle (5) and the second circular baffle (6), the left cover body (3) and the steam cover (8) can be connected. The second circular baffle (6) is provided with a secondary steam port (11), and the secondary steam port (11) is communicated with the left cover (3) on the next distillation unit (1) through the outlet of the right cover (4).
2. The low-temperature multi-effect seawater distillation system with convenient maintenance according to claim 1, characterized in that: The connecting plate (9) is a circular connecting plate. The connecting plate (9) has the same size as the first circular baffle (5) so that the two can fit completely together. An observation window is provided on the middle cylinder (2).
3. The low-temperature multi-effect seawater distillation system with convenient maintenance according to claim 1 or 2, characterized in that: The connecting plate (9) is fitted onto the left end surface of the first circular baffle (5) and is fixed by bolts and nuts.
4. The low-temperature multi-effect seawater distillation system with convenient maintenance according to claim 3, characterized in that: A sealing gasket is provided between the connecting plate (9) and the first circular baffle (5).
5. The low-temperature multi-effect seawater distillation system with convenient maintenance according to claim 3, characterized in that: The left cover (3) is connected to a steam pipe (12), the steam pipe (12) comprises a longitudinal pipe and a transverse pipe, the transverse pipe is connected to the left cover (3), and the longitudinal pipe is connected to at least one drainage fan (13) to quickly introduce hot steam in the steam pipe (12) into the left cover (3) at the leftmost end.
6. The low-temperature multi-effect seawater distillation system with convenient maintenance according to claim 5, characterized in that: The induced draft fan (13) is sealed and connected to the longitudinal pipe via a flange.
7. The low-temperature multi-effect seawater distillation system with convenient maintenance according to claim 1, characterized in that: The middle cylinder (2) is connected to a jet disk (15), the seawater pipe (14) and the jet disk (15) are in sealed communication via a flange, the jet disk (15) has an outlet facing downward and a bottom plate (16) is detachably sealed at the outlet, and a plurality of water outlets are provided on the bottom plate (16).
8. The low-temperature multi-effect seawater distillation system with convenient maintenance according to claim 7, characterized in that: The bottom plate (16) is embedded in the outlet of the injection disc (15), and a sealing ring surrounds the bottom plate (16) and the outlet of the injection disc (15).
9. The low-temperature multi-effect seawater distillation system with convenient maintenance according to claim 7 or 8, characterized in that: The bottom plate (16) and the spray disc (15) are connected via a lock; The left cover body (3) and the right cover body (4) are both connected to the middle cylinder body (2) through bolts and nuts.
10. The low-temperature multi-effect seawater distillation system with convenient maintenance according to claim 1, characterized in that: The secondary steam port (11) located in the right cover body (4) is connected to an arc-shaped tube, and the lower end of the arc-shaped tube is arranged toward the outlet of the right cover body (4).