Filter cake recovery assembly of filter cake layer candle filter

Abstract

The utility model relates to the technical field, in particular to a filter cake recovery assembly of a filter cake layer candle filter, which comprises a filter tank, a stock solution inlet pipe, a filtrate outlet pipe and a connecting plate fixedly connected to the inner wall of the filter tank, and a plurality of candle filter pipes are arranged at the upper end of the connecting plate. The cake discharging plate and the annular scraper are arranged on the candle type filter tube in a sleeving manner, redundant filter cake layers on the candle type filter tube are scraped off in the rising process of the cake discharging plate and the annular scraper, the filter cake layers in the candle type filter tube cannot be scraped off, impact and damage to the candle type filter tube are smaller, the filter cake layer re-forming time is shortened, and the filtering efficiency and the filtering effect are improved. And the cake unloading plate can directly support and take up the filter cake layer without additional separation operation, so that the recovery process of the filter cake layer is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of candle filter cleaning, in particular to a filter cake recovery component of a cake layer candle filter. Background Art

[0002] Candle filter is a highly efficient and safe filtering equipment. It is currently used more and more frequently in factory workshops. Candle filter has gradually replaced filter press and bag filtration to become the mainstream filtering method. The filter medium can be reused many times, saving a lot of filter consumables.

[0003] During use, the candle filter's filter media accumulates more and more solid impurities inside and on its surface. However, this accumulation of impurities is not necessarily a disadvantage. In fact, when these solids reach a certain thickness, they form a so-called filter cake layer. Because the gaps between the particles in the filter cake layer are very small, they prevent the escape of particulate impurities in the liquid, thus making the filtrate clearer and achieving the desired filtration effect.

[0004] Although the filter cake layer plays an indispensable role in the filtration process, as the filtration time gets longer, the thickness of the filter cake layer will become thicker, which will cause the rate of filtrate passing through the filter cake layer to become lower and lower, and then the filtration efficiency will deteriorate. Therefore, it is necessary to clean these filter cake layers regularly.

[0005] Currently, the most commonly used method for cleaning the filter cake layer is the "backflush method." The "backflush method" is to pump high-pressure gas into the liquid outlet pipe to blow away the impurities (filter cake layer) attached to the inside and outside of the filter medium in the opposite direction, while opening the valve at the bottom of the cylinder to discharge the residue, and then rebuild a new "filter cake layer" to start a new round of filtration cycle. However, this method has several problems:

[0006] Firstly, since the voids in the filter medium itself are larger than the diameter of the solid particles, the filter medium itself cannot play an effective filtering role. Generally, effective filtration can only be achieved after sufficient solid impurities are left inside the filter medium and on its surface area. This results in ineffective filtration in the early part of each filtration cycle.

[0007] Secondly, the various solid impurities in the filter cake layer are valuable in themselves and are very worthy of recovery. The blown-away solid impurities fall back into the original liquid and are then discharged together through slag discharge. Additional separation operations are required to obtain the loose filter cake residue that is difficult to collect, making the entire filter cake layer recovery process more cumbersome and complicated, and bringing a lot of unnecessary trouble. Utility Model Content

[0008] In view of this, the purpose of the present invention is to propose a filter cake recovery component for a filter cake candle filter to solve the technical problems of long-term ineffective filtration during the formation of the filter cake layer in the filtration cycle and the cumbersome technical problems of the filter cake layer recovery process in the prior art.

[0009] Based on the above purpose, the utility model provides a filter cake recovery assembly for a cake layer candle filter, comprising a filter tank for filtering a raw liquid, the filter tank being further connected to a raw liquid inlet pipe and a filtrate outlet pipe, and the filter cake recovery assembly further comprising:

[0010] A bottom plate fixedly connected to the inner wall of the filter tank, wherein the upper end of the bottom plate is provided with a plurality of candle filter tubes, and the candle filter tubes are connected to the filtrate outlet pipe;

[0011] The cake unloading plate is slidably connected to the filter tank and is used to scrape off the filter cake layer on the outer wall of the candle filter tube. The cake unloading plate is provided with a plurality of through holes, and the candle filter tube is located in the through holes and slidably connected thereto.

[0012] Furthermore, the filtrate outlet pipe is connected to a lower position of the filter tank and is lower than a position of the raw liquid inlet pipe. The filter tank is fixedly mounted on a bracket.

[0013] Furthermore, the filtrate outlet pipe is connected to the lower end of the bottom plate, and a liquid flow channel for conveying liquid is provided in the bottom plate. The candle filter tube is vertically fixedly connected to the upper end of the bottom plate, and the candle filter tube is connected to the liquid flow channel in the bottom plate. The filtrate outlet pipe is also connected to the liquid flow channel in the bottom plate.

[0014] Furthermore, the cake unloading plate is provided with a liquid drain port, and the upper end of the bottom plate is provided with a through hole, which is communicated with the liquid flow channel in the bottom plate, and the through hole and the liquid drain port are staggered.

[0015] Furthermore, a filter layer is provided in the liquid discharge port, and the gaps in the filter layer are smaller than the gaps in the candle filter tube.

[0016] Furthermore, the cake unloading plate is provided with a plurality of annular scrapers, each annular scraper corresponds to a candle filter tube, and the annular scrapers are also sleeved on the candle filter tube.

[0017] Furthermore, the inner diameter of the annular scraper is the same as the outer diameter of the candle filter tube, and the blade of the annular scraper faces upward.

[0018] Furthermore, a plurality of connecting plates are connected to the cake unloading plate, and a mounting end is provided at the upper end of the connecting plate for hanging on the upper port of the filter tank.

[0019] Furthermore, the upper end of the filter tank is also equipped with a sealing cover, and the sealing cover is detachably connected to the filter tank.

[0020] The beneficial effects of the utility model are as follows: 1. A cake unloading plate and an annular scraper are sleeved on the candle filter tube, and the excess filter cake layer on the candle filter tube is scraped off during the rising process of the cake unloading plate and the annular scraper. Compared with the "backflushing method" for processing the filter cake layer, it not only has less impact and damage to the candle filter tube, but is also more convenient and quick. It can not only efficiently clean the filter residue, but also directly support and bring up the filter cake layer for easy recovery and collection.

[0021] 2. The ring scraper scrapes off the filter cake layer on the candle filter tube without scraping off the solid impurities in the filter cake layer inside the candle filter tube. Compared with the "backflush method", the filter cake layer on the outer wall of the candle filter tube and the solid impurities inside the candle filter tube are completely blown away. This method shortens the time it takes for the filter cake layer to reform during each filtration cycle, thereby greatly reducing the ineffective filtration time and improving the filtration efficiency and filtration effect.

[0022] 3. A drainage port is set on the cake unloading plate, so that some residual raw liquid can be discharged smoothly through the drainage port. A filter layer is set in the drainage port, and the gaps in the filter layer are smaller than the gaps in the candle filter tube. Therefore, the filter cake layer can be directly blocked, so that the filter cake layer taken out at the end will only carry a very small amount of raw liquid. Therefore, no additional separation operation is required, which simplifies the filter cake layer recovery process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall structural principle of the utility model.

[0025] Figure 2 It is a front view of the device of the present utility model.

[0026] Figure 3 It is a schematic diagram of the internal structure of the device of the present utility model.

[0027] Figure 4 for Figure 3 Enlarged view of part A.

[0028] Figure 5 It is a structural schematic diagram of the cake unloading plate part in the device of the present invention.

[0029] The following are marked in the figure:

[0030] 101. Filter tank, 102. Bracket, 103. Raw liquid inlet pipe, 104. Filtrate outlet pipe, 105. Sealing cover, 106. Bottom plate, 107. Candle filter tube, 108. Liquid flow channel, 109. Through hole, 110. Cake unloading plate, 111. Connecting plate, 112. Mounting end, 113. Annular scraper, 114. Drain port, 115. Filter layer. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0032] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0033] The first aspect of the present invention is as follows Figure 1 、 Figure 2 and Figure 3 As shown, this solution adds a filter cake recovery component to the existing candle filter. Specifically, a mature filter tank 101 is used for filtering the raw liquid. A raw liquid inlet pipe 103 and a filtrate outlet pipe 104 are connected to the filter tank 101. The raw liquid inlet pipe 103 is used to transport the raw liquid into the inner cavity of the filter tank 101, while the filtrate outlet pipe 104 is used to discharge the filtered filtrate. Furthermore, a base plate 106 is fixedly attached to the inner wall of the filter tank 101, and a plurality of vertically fixed candle filter tubes 107 are installed at the upper end of the base plate 106.

[0034] Each candle filter tube 107 is connected to the filtrate outlet pipe 104, and the filtrate outlet pipe 104 is connected to the upper end of the bottom plate 106. A liquid flow channel 108 for conveying liquid is provided in the bottom plate 106. The candle filter tube 107 is vertically fixed to the upper end of the bottom plate 106, and the candle filter tube 107 is connected to the liquid flow channel 108. The filtrate outlet pipe 104 is also connected to the liquid flow channel 108 in the bottom plate 106.

[0035] Preferably, the filtrate outlet pipe 104 is connected to a lower position of the filter tank 101 and is lower than the position of the raw liquid inlet pipe 103 , and the filter tank 101 is fixedly mounted on the bracket 102 .

[0036] As the filtration time gets longer, the thickness of the filter cake layer will become thicker, which will cause the rate at which the filtrate passes through the filter cake layer to become lower and lower, and then the filtration efficiency will deteriorate. Therefore, it is necessary to clean these filter cake layers regularly.

[0037] In order to solve this problem, a cake unloading plate 110 is installed on the candle filter tube 107 to scrape off the filter cake layer on the outer wall of the candle filter tube 107. The cake unloading plate 110 is provided with a plurality of through holes, and the candle filter tube 107 is located in the through holes and is slidably connected thereto.

[0038] In addition, a number of annular scrapers 113 are provided on the cake unloading plate 110. Each annular scraper 113 corresponds to a candle filter tube 107, and the annular scraper 113 is also sleeved on the candle filter tube 107. The inner diameter of the annular scraper 113 is the same as the outer diameter of the candle filter tube 107, and the blade of the annular scraper 113 faces upward.

[0039] The annular scraper 113 is used to cooperate with the cake unloading plate 110 to scrape off the excess filter cake layer on the outer wall of the candle filter tube 107. Compared with the "backflushing method" to deal with the filter cake layer, it not only has less impact and damage to the candle filter tube, but is also more convenient and quick. It can not only efficiently clean the filter residue, but also directly support and bring up the filter cake layer for easy recycling and collection.

[0040] Because the filter cake layer itself acts as a filter, the gaps between the particles in the filter cake layer are very small, preventing the escape of particulate impurities in the liquid, thus making the filtrate clear and achieving the filtering effect required for production. Therefore, when cleaning the filter cake layer, the filter residue should not be completely cleaned. Instead, the filter cake layer on the candle filter tube 107 is scraped off by the annular scraper 113, without scraping off the solid impurities in the filter cake layer inside the candle filter tube 107. Compared to the "backflush method", the filter cake layer on the outer wall of the candle filter tube and the solid impurities inside the candle filter tube are completely blown away. This method shortens the time it takes for the filter cake layer to reform in each filtration cycle, thereby greatly shortening the ineffective filtration time and improving the filtration efficiency and filtration effect.

[0041] The second aspect of the present invention is as follows: Figure 3 and Figure 4 As shown, since the various solid impurities in the filter cake layer are valuable in themselves and are very worthy of recovery, the blown-away solid impurities fall back into the original liquid and are discharged together through slag discharge. Additional separation operations are required to obtain the loose filter cake residue that is difficult to collect, making the entire filter cake layer recovery process more cumbersome and complicated, and bringing a lot of unnecessary trouble.

[0042] This solution also features a drain port 114 on the cake unloading plate 110, and a filter layer 115 within the drain port 114. The gaps in the filter layer 115 are finer than those in the candle filter tubes 107. Furthermore, a through hole 109 is provided at the top of the bottom plate 106. This through hole 109 communicates with the liquid flow channel 108 within the bottom plate 106, and the through hole 109 is staggered from the drain port 114. Therefore, when the cake unloading plate 110 is not in use, it presses against the bottom plate 106, blocking both the drain port 114 and the through hole 109.

[0043] Furthermore, the cake unloading plate 110 is connected to several connecting plates 111. The upper ends of these connecting plates 111 are provided with mounting tips 112 for mounting on the upper port of the filter tank 101. When the mounting tips 112 are mounted on the upper port of the filter tank 101, it is necessary to ensure that the cake unloading plate 110 is pressed against the bottom plate 106. If the required precision is too high to achieve, the mounting tips 112 can be slightly higher than the upper port of the filter tank 101 when the cake unloading plate 110 is pressed against the bottom plate 106.

[0044] Preferably, the upper end of the filter tank 101 is further provided with a sealing cover 105 , and the sealing cover 105 is detachably connected to the filter tank 101 .

[0045] A drain port 114 is provided on the cake unloading plate 110, so that some residual raw liquid can be discharged smoothly through the drain port 114, and a filter layer 115 is provided in the drain port 114. The gaps in the filter layer 115 are smaller than the gaps in the candle filter tube 107, so the filter cake layer can be directly blocked, so that the filter cake layer taken out at the end will only carry a very small amount of raw liquid. Therefore, no additional separation operation is required, which simplifies the filter cake layer recovery process.

[0046] In summary, the present invention sets a cake discharge plate 110 and an annular scraper 113 on the candle filter tube 107. The cake discharge plate 110 and annular scraper 113 scrape off the excess filter cake layer on the candle filter tube 107 during their ascent. Compared to the "backflush" method for handling the filter cake layer, this method not only causes less impact and damage to the candle filter tube, but is also more convenient and quicker. Furthermore, it not only effectively cleans the filter residue, but also directly supports and brings the filter cake layer up for easy recycling and collection. Furthermore, the annular scraper 113 scrapes off the filter cake layer on the candle filter tube 107 without scraping off the solid impurities in the filter cake layer inside the candle filter tube 107. Compared to the "backflush" method, which blows away the filter cake layer on the outer wall of the candle filter tube and the solid impurities inside the candle filter tube, this method shortens the time it takes for the filter cake layer to reform during each filtration cycle, thereby significantly shortening the ineffective filtration time and improving filtration efficiency and filtration effects.

[0047] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention, including the claims, is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0048] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A filter cake recovery assembly for a cake layer candle filter, comprising a filter tank (101) for filtering a raw liquid, wherein the filter tank (101) is further connected to a raw liquid inlet pipe (103) and a filtrate outlet pipe (104), characterized in that: The filter cake recovery component also includes: A bottom plate (106) is fixedly connected to the inner wall of the filter tank (101), and a plurality of candle filter tubes (107) are provided at the upper end of the bottom plate (106), and the candle filter tubes (107) are connected to the filtrate outlet pipe (104); A cake unloading plate (110) is slidably connected to the filter tank (101) and is used to scrape off the filter cake layer on the outer wall of the candle filter tube (107). The cake unloading plate (110) is provided with a plurality of through openings, and the candle filter tube (107) is located in the through openings and is slidably connected thereto.

2. The filter cake recovery assembly of the cake layer candle filter according to claim 1, characterized in that: The filtrate outlet pipe (104) is connected to a lower position of the filter tank (101) and is located lower than the position of the raw liquid inlet pipe (103). The filter tank (101) is fixedly mounted on the bracket (102).

3. The filter cake recovery assembly of the filter cake candle filter according to claim 1, characterized in that: The filtrate outlet pipe (104) is connected to the lower end of the bottom plate (106), and a liquid flow channel (108) for conveying liquid is provided in the bottom plate (106). The candle filter tube (107) is vertically fixedly connected to the upper end of the bottom plate (106), and the candle filter tube (107) is communicated with the liquid flow channel (108) in the bottom plate (106). The filtrate outlet pipe (104) is also communicated with the liquid flow channel (108) in the bottom plate (106).

4. The filter cake recovery assembly of the filter cake candle filter according to claim 3, characterized in that: The cake unloading plate (110) is further provided with a liquid discharge port (114), and the upper end of the bottom plate (106) is further provided with a through hole (109), the through hole (109) is communicated with the liquid flow channel (108) in the bottom plate (106), and the through hole (109) and the liquid discharge port (114) are staggered.

5. The filter cake recovery assembly of the filter cake candle filter according to claim 4, characterized in that: A filter layer (115) is further provided in the liquid discharge port (114), and the gaps in the filter layer (115) are finer than the gaps in the candle filter tube (107).

6. The filter cake recovery assembly of the filter cake candle filter according to claim 1, characterized in that: The cake unloading plate (110) is further provided with a plurality of annular scrapers (113), each annular scraper (113) corresponds to a candle filter tube (107), and the annular scraper (113) is also sleeved on the candle filter tube (107).

7. The filter cake recovery assembly of the cake layer candle filter according to claim 6, characterized in that: The inner diameter of the annular scraper (113) is the same as the outer diameter of the candle filter tube (107), and the blade of the annular scraper (113) faces upward.

8. The filter cake recovery assembly of the cake layer candle filter according to claim 1, characterized in that: The cake unloading plate (110) is further connected to a plurality of connecting plates (111), and the upper ends of the connecting plates (111) are provided with mounting ends (112) for mounting on the upper ports of the filter tank (101).

9. The filter cake recovery assembly of the cake layer candle filter according to claim 8, characterized in that: The upper end of the filter tank (101) is also equipped with a sealing cover (105), and the sealing cover (105) is detachably connected to the filter tank (101).

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