MVR (Mechanical Vapor Recompression) quick-release precise filtering device
By designing the MVR quick disassembly precision filter device during the purification process of copper electrolyte, the problem of shutdown and cooling of the foam trap replacement is solved, and rapid replacement and production continuity is achieved, the compressor impeller is protected and maintenance costs are reduced.
Patent Information
- Application Number
- CN202421735007.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-07-22
AI Technical Summary
During the purification process of existing copper electrolyte, the foam trap is located in the kettle body, which causes the machine to be shut down when replacing the foam trap to cool down. It is inconvenient and dangerous to operate, affecting production continuity, and the replacement time is long, which increases maintenance costs.
Design a MVR quick disassembly precision filtration device, which lies the filter structure outside the MVR evaporation kettle body, including a precision filter can, a condensate collection tank, a steam inlet pipe, an outlet pipe, a wire mesh foam capture layer, etc., to achieve rapid replacement, avoid operation in confined spaces, and shorten the steam path.
It realizes rapid replacement of the filter structure, reduces the entrainment of liquid beads and impurities of steam, protects the compressor impeller, extends its service life, improves production continuity, and reduces maintenance costs.
Smart Images
Figure CN223118569U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of copper electrolyte purification, in particular to an MVR quick-detachable precision filtering device. Background Art
[0002] In the field of copper electrolyte purification, MVR (steam mechanical recompression technology) is widely used in electrolyte evaporation concentration-water cooling crystallization copper removal. Its equipment mainly includes gas compressor, evaporator, heat exchanger, forced circulation pump, water ejector, etc. Among them, the foam collector in the kettle is a key component, which is generally composed of a wire mesh foam collector layer and a foam collector layer bracket. It is used to filter the foam, strong acidic small liquid droplets and tiny solid impurities entrained by the steam, making the passing steam purer and free of liquid or solid, thereby reducing the scaling of the steam circulation pipeline and protecting the equipment components. However, the existing structure In the design, there is a considerable distance between the foam collector and the compressor. Even if sufficient insulation measures are taken for the pipeline, the steam filtered by the foam collector will inevitably cool down and condense, resulting in the appearance of tiny liquid droplets of strong acid and the precipitation of arsenic, antimony and bismuth impurities. The liquid droplets and the precipitated impurities act on the high-speed rotating compressor impeller for a long time, which may cause the impeller to corrode, deform or even eccentric. Therefore, after the MVR cycle has been running for a period of time, the expensive impeller must be stopped for replacement. The shutdown and replacement time is no less than 8 hours, which not only affects normal production, but also greatly increases the equipment maintenance cost.
[0003] After the foam collector has been working for a period of time, scaling will appear on the wire mesh foam collector layer, and the foam collector must be replaced to ensure steam permeability. However, since the foam collector is located in the kettle, the machine must be shut down and the temperature inside the kettle must be cooled down before replacement. The replacement process is carried out in a closed space, which is very inconvenient and dangerous. The entire shutdown, cooling and replacement process takes no less than 3 days, which is not conducive to maintaining production continuity. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides an MVR quick-detachable precision filtering device, which solves the problem that after the foam catcher has been working for a period of time, scaling will occur on the wire mesh foam catcher layer, and the foam catcher must be replaced to ensure steam permeability. However, since the foam catcher is located in the kettle body, the machine must be shut down and the temperature inside the kettle body must be waited for to drop before replacement. Moreover, the replacement operation is carried out in a confined space, which is very inconvenient and dangerous. The entire shutdown, cooling and replacement process takes no less than 3 days, which is not conducive to maintaining the technical problem of continuous production.
[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0006] An MVR quick-release precision filtering device, comprising a precision filtering tank, a condensate collection tank, a condensate outlet pipe, a steam inlet pipe, a steam outlet pipe, a wire mesh demister, a flow guide net, a demister support and a support ring. The precision filtering tank and the condensate collection tank are of an integrated structure. The top of the precision filtering tank is open and is provided with a cover plate fixed and sealed by a flange. The steam outlet pipe is arranged above the precision filtering tank, the steam inlet pipe is arranged above the condensate collection tank, and the condensate outlet pipe is installed at the bottom of the condensate collection tank.
[0007] Preferably: The internal structure of the precision filtering tank from bottom to top is successively a support ring, a demister support, a flow guide net and a wire mesh demister.
[0008] Preferably: The support ring is of an annular structure with a rectangular cross-section, is fixedly connected to the sides of the precision filtering tank and the condensate collection tank, and is used to support the demister support.
[0009] Preferably: The demister support is of an annular structure with a rectangular cross-section, and is internally provided with cross-shaped long strips for reinforcement.
[0010] Preferably: The flow guide net has a metal grid inside, and there are vertical metal strips at the grid nodes.
[0011] Preferably: The wire mesh demister is a multi-layer horizontal stacked structure made of round cake titanium material wire mesh.
[0012] The utility model has the following beneficial effects:
[0013] First, compared with the prior art, the entire filtering structure is located outside the MVR evaporation kettle body. After the MVR is shut down, the filtering structure can be quickly replaced without waiting for a long time for the evaporation kettle body to cool down, and the operation is convenient and fast.
[0014] Second, the device significantly shortens the path of the steam after filtration to the compressor inlet, slows down the temperature reduction trend, enables the steam entering the compressor to carry less liquid droplets and impurities to precipitate, protects the compressor impeller, and prolongs its service life. Description of the Drawings
[0015] The above description is only an overview of the technical solution of the utility model. In order to be able to understand the technical means of the utility model more clearly and implement it in accordance with the content of the description, the following will be described in detail with reference to the preferred embodiments of the utility model and the accompanying drawings.
[0016] Figure 1 is the overall structure diagram of the utility model;
[0017] Figure 2 is the structure diagram of the demister support of the utility model;
[0018] Figure 3This is a structural diagram of the guide net of the utility model.
[0019] Legend: 1. Precision filter tank; 2. Condensate collection tank; 3. Condensate outlet pipe; 4. Steam inlet pipe; 5. Steam outlet pipe; 6. Cover plate; 7. Wire mesh foam capture layer; 8. Guide net; 9. Foam capture layer bracket; 10. Support ring. DETAILED DESCRIPTION
[0020] The embodiment of the present application provides an MVR quick-detachable precision filtering device, which effectively solves the problem that after the foam catcher has been working for a period of time, the wire mesh foam catcher layer will scale and must be replaced to ensure steam permeability. However, since the foam catcher is located in the kettle body, the machine must be shut down and the temperature inside the kettle body must be waited for to drop before replacement, and the replacement operation is carried out in a closed space, which is very inconvenient and dangerous. The entire shutdown, cooling and replacement process takes no less than 3 days, which is not conducive to maintaining production continuity. Compared with the prior art, the entire filtering structure is located outside the MVR evaporator body, and the replacement of the filtering structure can be quickly performed after the MVR is shut down, without having to wait for a long time for the evaporator body to cool down, and the operation is convenient and quick. The equipment significantly shortens the path from the filtered steam to the compressor inlet, slows down the temperature reduction trend, and makes the steam entering the compressor carry less liquid droplets and impurities, thereby protecting the compressor impeller and extending its service life. Example
[0021] like Figure 1 , Figure 2 and Figure 3As shown, the technical solution in the embodiment of the present application effectively solves the problem that after the foam catcher has been working for a period of time, the wire mesh foam catcher layer will become scaled and the foam catcher must be replaced to ensure steam permeability. However, since the foam catcher is located in the kettle, the machine must be shut down and the temperature inside the kettle must be waited for to drop before replacement. Moreover, the replacement operation is carried out in a closed space, which is very inconvenient and dangerous. The entire shutdown, cooling and replacement process takes no less than 3 days, which is not conducive to maintaining the continuity of production. The overall idea is as follows: an MVR quick-detachable precision filtration device, comprising a precision filtration tank 1, a condensate collection tank 2, a condensate outlet pipe 3, a steam inlet pipe 4, a steam outlet pipe 5, a wire mesh foam catcher layer 7, a guide net 8, a foam catcher layer bracket 9 and a support ring 10, a precision filtration The tank 1 and the condensate collection tank 2 are integrated structures, which are only different functional parts of the same tank body. The top of the precision filter tank 1 is open and is provided with a flange fixed and sealed cover plate 6. The steam inlet pipe 4 is arranged above the condensate collection tank 2, and the steam inlet pipe 4 is connected to the steam outlet of the MVR evaporator. The steam outlet pipe 5 is arranged above the precision filter tank 1, so that more steam rises obliquely, extending the steam through the filter screen path to optimize the filtering effect. The steam outlet pipe 5 is connected to the compressor air inlet through the expansion joint. The condensate outlet pipe 3 is installed at the bottom of the condensate collection tank 2. The condensate outlet pipe 3 is connected to the water accumulation tank and a pneumatic valve is arranged in the middle. The condensate in the water accumulation tank is periodically pumped into the MVR main condensate tank through the water accumulation pump. The precision filter tank 1 and its internal structure play a filtering role. In order to purify steam, the condensate collection tank 2 is used to collect the condensate generated by filtration. The internal structure of the precision filter tank 1 is, from bottom to top, a support ring 10, a foam-catching layer bracket 9, a guide net 8 and a wire mesh foam-catching layer 7. The support ring 10 is an annular structure with a rectangular cross section. It is fixedly connected to the sides of the precision filter tank 1 and the condensate collection tank 2 and is used to support the foam-catching layer bracket 9. The foam-catching layer bracket 9 is an annular structure with a rectangular cross section. Cross-crossed strips are arranged inside the support ring 10 for reinforcement. The foam-catching layer bracket 9 is placed on the support ring 10. While the support ring 10 plays a supporting role, it is in close contact with the foam-catching layer bracket 9 and can reduce the impure steam from directly rising from the gap between the cylinder of the precision filter tank 1 and the wire mesh foam-catching layer 7, so that most of the steam passes through the wire mesh. The foam catching layer 7 is used to enhance the filtering effect. There is a metal grid inside the guide net 8, and there are vertical metal strips at the grid nodes. The entire guide net 8 can accelerate the gathering and falling dripping of condensed water produced by filtration. The wire mesh foam catching layer 7 is a multi-layer horizontal stacking structure of round titanium wire mesh. Steam enters the steam inlet pipe 4 from the steam outlet of the MVR evaporator. Under the negative pressure formed at the compressor inlet, the steam enters the precision filter tank 1 and passes through the guide net 8 and the wire mesh foam catching layer 7 to achieve the purpose of foam catching and filtering. The condensed water formed in the process is collected on the vertical metal strips of the guide net 8 and drips down. The clean steam that penetrates the wire mesh foam catching layer 7 enters the compressor inlet along the pipeline. When replacing the wire mesh foam catching layer 7, first shut down the MVR, close the MVR steam outlet valve and the compressor inlet valve,After removing the flange of the top cover plate 6 of the precision filter tank 1, the stacked wire mesh demister 7 can be taken out. If necessary, rinse the inside of the tank body. After the replacement is completed, reinstall the cover plate 6, and it can be put back into use. The whole replacement process is convenient and fast, avoiding operation in a confined space and having low risk.
[0022] In view of the problems existing in the prior art, the present utility model provides an MVR quick-disassembly precision filtering device. Compared with the prior art, the entire filtering structure is located outside the MVR evaporation kettle body. After the MVR is shut down, the filtering structure can be quickly replaced without waiting for a long time for the evaporation kettle body to cool down, and the operation is convenient and fast. The device significantly shortens the path from the filtered steam to the compressor inlet, slows down the temperature reduction trend, enables the steam entering the compressor to carry less liquid droplets and impurities to precipitate, protects the compressor impeller, and prolongs its service life.
[0023] Working principle:
[0024] In the first step, steam enters the steam inlet pipe 4 from the steam outlet of the MVR evaporation kettle. Under the negative pressure formed at the compressor inlet, the steam enters the precision filter tank 1 and then passes through the guide net 8 and the wire mesh demister 7 to achieve the purpose of demisting and filtering. The condensed water formed during the process gathers on the vertical metal bars of the guide net 8 and drips down, and the clean steam passing through the wire mesh demister 7 enters the compressor inlet along the pipeline.
[0025] In the second step, when replacing the wire mesh demister 7, first shut down the MVR. After closing the MVR steam outlet valve and the compressor inlet valve, remove the flange of the top cover plate 6 of the precision filter tank 1, and then the stacked wire mesh demister 7 can be taken out. If necessary, rinse the inside of the tank body. After the replacement is completed, reinstall the cover plate 6, and it can be put back into use. The whole replacement process is convenient and fast, avoiding operation in a confined space and having low risk.
[0026] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly illustrating the present utility model and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present utility model.
Claims
1. An MVR quick-release precision filtration device, comprising a precision filtration tank (1), a condensate collection tank (2), a condensate outlet pipe (3), a steam inlet pipe (4), a steam outlet pipe (5), a wire mesh demister layer (7), a guiding net (8), a demister support (9) and a support ring (10), characterized in that, The precision filter tank (1) and the condensate collection tank (2) are of an integrated structure. The top of the precision filter tank (1) is open and is provided with a cover plate (6) fixed and sealed by a flange. Among them, the steam outlet pipe (5) is arranged above the precision filter tank (1), the steam inlet pipe (4) is arranged above the condensate collection tank (2), and the condensate outlet pipe (3) is installed at the bottom of the condensate collection tank (2).
2. The MVR quick-release precision filtration device according to claim 1, wherein The internal structure of the precision filter tank (1) from bottom to top is successively a support ring (10), a demisting layer support (9), a flow guiding net (8), and a wire mesh demisting layer (7).
3. The MVR quick-release precision filtration device according to claim 2, characterized in that, The support ring (10) is of a ring structure with a rectangular cross-section, is fixedly connected to the sides of the precision filter tank (1) and the condensate collection tank (2), and is used to support the demisting layer support (9).
4. The MVR quick-release precision filtration device according to claim 3, characterized in that, The demisting layer support (9) is of a ring structure with a rectangular cross-section, and is internally provided with cross-shaped long strips for reinforcement.
5. The MVR quick-disassembly precision filtration device according to claim 2, characterized in that, The flow guiding net (8) has a metal grid inside, and there are vertical metal strips at the grid nodes.
6. The MVR quick-release precision filtration device according to claim 2, wherein The wire mesh demisting layer (7) is a multi-layer horizontal stacked structure made of round cake titanium material wire mesh.