Filtering device for liquid fertilizer production

Abstract

The utility model discloses a filtering device for liquid fertilizer production, and relates to the technical field of filtering devices, the filtering device comprises a bag type filter and a cleaning assembly, the cleaning assembly comprises a wall scraping unit and a flushing unit; the wall scraping unit is used for performing wall scraping operation on the surface of the inner wall of the filter bag; the flushing unit is used for flushing the inner wall surface of the filter bag and the side surface of the bottom of the inner wall of the filter tank. The cleaning assembly is arranged, the inner wall of the filter bag can be scraped through rotation of the inverted-U-shaped scraping plate, full-range flushing operation can be formed on the inner wall of the filter bag and the side face of the inner wall of the bottom of the filter tank through rotation of the inverted-U-shaped spraying pipe and the spraying head, and compared with a traditional structure that the filter bag is reversely flushed through liquid, the cleaning efficiency is greatly improved. The impurity cleaning force can be further improved through active wall scraping and flushing, residues are effectively avoided, meanwhile, cleaning operation on the side face of the inner wall of the bottom of the filtering tank is achieved, and the impurity cleaning effect is further improved.

Description

Technical Field

[0001] This utility model relates to the field of filtration device technology, specifically a filtration device for liquid fertilizer production. Background Technology

[0002] Liquid fertilizer, also known as fluid fertilizer, is a liquid product containing one or more nutrients required by crops. The production of liquid fertilizer includes the following steps: dissolution and mixing. Solid raw materials are added to an appropriate amount of water and dissolved more quickly by stirring and heating to make a mother liquor. The various mother liquors are then added to a mixing tank according to the formula requirements and thoroughly stirred to ensure that the various nutrients in the fertilizer are evenly distributed.

[0003] Filtration and clarification: The produced liquid fertilizer is filtered through a filter to remove any insoluble impurities, undissolved particles, etc., making the fertilizer solution clearer and more transparent.

[0004] In existing technologies, most liquid fertilizer filtration uses bag filters. The general principle of a bag filter is as follows: liquid enters from the top or side of the filter, passes through the filter bag, solid particles are trapped, and clean liquid flows out from the bottom. With the development of technology, there is also a bag filter with a backwashing structure in existing technologies. It is installed with the filter bag upside down. When the filtration effect of the filter bag weakens, the bottom drain pipe is opened to discharge sewage, generating negative pressure to make the liquid backwash the filter bag, so that the impurities on the inner wall of the filter bag are flushed down and discharged, achieving the backwashing effect.

[0005] However, in actual operation, the rinsing force of the filter bag by the reverse flow of liquid is weak, and some strongly adhesive impurities cannot be washed away, which easily leaves residues. In addition, there are some adhesive impurities on the inner wall of the bottom of the filter. The impact force of the reverse flow of liquid on the inner wall of the bottom of the filter is even weaker, and these impurities are not easy to clean. Based on this, a filtration device for liquid fertilizer production is provided. Utility Model Content

[0006] The purpose of this invention is to provide a filtration device for liquid fertilizer production in order to solve the problems mentioned above.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a filtration device for liquid fertilizer production, comprising a bag filter consisting of a filter tank, a top cover, an annular seat, a filter bag, and a metal filter cartridge. The top cover is fixed to the top of the filter tank to seal the top opening of the filter tank. The annular seat is fixed to the inner side of the filter tank near the bottom and provides support for the installation of the filter bag and the metal filter cartridge. The filter bag and the metal filter cartridge are installed upside down on the top of the annular seat, with the filter bag located inside the metal filter cartridge. A side-inverted T-shaped drain outlet is fixed to the bottom of the filter tank for draining.

[0008] A cleaning assembly extending into the inside of the filter bag is provided below the filter tank. The cleaning assembly is used to perform rinsing and cleaning operations on the filter bag.

[0009] The cleaning assembly includes a wall scraping unit and a rinsing unit;

[0010] The scraping unit is used to scrape the inner wall surface of the filter bag, thereby scraping off impurities from the inner wall of the filter bag.

[0011] The rinsing unit is used to rinse the inner wall surface of the filter bag and the bottom side of the inner wall of the filter tank.

[0012] As a further embodiment of this utility model: the wall scraping unit includes a water supply pipe, an inverted U-shaped scraper, a driven gear, a drive motor, a mounting bracket, and a driving gear;

[0013] The water supply pipe is distributed inside the vertical part of the side-inverted T-shaped sewage outlet and passes through the upper and lower ends of the vertical part of the side-inverted T-shaped sewage outlet. The top of the water supply pipe extends to the inside of the filter bag and is fixedly connected to the inverted U-shaped scraper. The inverted U-shaped scraper is in contact with the inner wall of the filter bag. The inner wall scraping operation of the filter bag is achieved by rotating the inverted U-shaped scraper.

[0014] The bottom of the inverted U-shaped scraper extends to the bottom of the side-inverted T-shaped drain outlet. The driven gear is located below the side-inverted T-shaped drain outlet and fixed to the outside of the inverted U-shaped scraper. The drive motor is located below the filter tank and is fixedly connected to the support legs of the filter tank through a mounting bracket.

[0015] The driving gear is fixed to the bottom of the output shaft of the drive motor and meshes with the driven gear. The drive motor drives the water pipe and the inverted U-shaped scraper to rotate as a whole.

[0016] As a further improvement of this utility model: the rinsing unit includes an inverted U-shaped spray pipe and a nozzle;

[0017] The inverted U-shaped nozzle is fixed to the outside of the water supply pipe and distributed inside the filter bag, with the bottom of the inverted U-shaped nozzle extending to the area below the annular seat.

[0018] The nozzles are provided in multiple ways and are evenly distributed along the trajectory of the inverted U-shaped nozzle. The nozzles are connected to the inner cavity of the inverted U-shaped nozzle and the water supply pipe.

[0019] As a further embodiment of this utility model: the inverted U-shaped nozzle and the inverted U-shaped scraper are staggered along the circumferential direction, and the outer diameter of the inverted U-shaped nozzle is smaller than the inner diameter of the filter bag, and the nozzle is not in contact with the inner wall surface structure of the filter bag.

[0020] As a further embodiment of this utility model: an inlet and an outlet are fixed on both sides of the outer wall of the filter tank, the inlet and outlet are connected to the inner cavity of the filter tank, and the inlet and outlet are located below and above the port of the filter tank, respectively.

[0021] The top of the top cover is provided with a pressure testing port, and the top of the inner wall of the top cover is fixed with a clamping component to press the metal filter cartridge.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] By setting up cleaning components, the inner wall of the filter bag can be scraped by rotating the inverted U-shaped scraper, and the inner wall and sides of the bottom of the filter tank can be rinsed by rotating the inverted U-shaped spray pipe and nozzle. Compared with the traditional structure of backwashing the filter bag with liquid, the active scraping and rinsing can further improve the cleaning power of impurities and effectively avoid residue. At the same time, it can also clean the sides of the bottom of the filter tank, further improving the impurity cleaning effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0026] Figure 3 This is a cross-sectional view of some parts of the cleaning component and the bag filter of this utility model.

[0027] In the diagram: 1. Bag filter; 101. Filter tank; 102. Top cover; 103. Pressure test port; 104. Clamping component; 105. Annular seat; 106. Filter bag; 107. Metal filter cartridge; 108. Liquid inlet; 109. Liquid outlet; 110. Side-inverted T-shaped drain outlet; 2. Cleaning assembly; 201. Water supply pipe; 202. Inverted U-shaped scraper; 203. Inverted U-shaped spray pipe; 204. Nozzle; 205. Driven gear; 206. Drive motor; 207. Mounting bracket; 208. Drive gear. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-3 In this embodiment of the present invention, a filtration device for liquid fertilizer production includes a bag filter 1 consisting of a filter tank 101, a top cover 102, an annular seat 105, a filter bag 106, and a metal filter cartridge 107. The top cover 102 is fixed to the top of the filter tank 101 to seal the top opening of the filter tank 101. The annular seat 105 is fixed to the inner side of the filter tank 101 near the bottom and provides support for the installation of the filter bag 106 and the metal filter cartridge 107. The filter bag 106 and the metal filter cartridge 107 are installed upside down on the top of the annular seat 105, with the filter bag 106 located inside the metal filter cartridge 107. An inlet 108 and an outlet 109 are fixed on both sides of the outer wall of the filter tank 101, respectively. The inlet 108 and the outlet 109 are connected to the inner cavity of the filter tank 101, and the inlet 108 and the outlet 109 are located below and above the annular seat 105, respectively.

[0030] The top of the top cover 102 is provided with a pressure testing port 103, and the top of the inner wall of the top cover 102 is fixed with a clamping part 104 for pressing the metal filter cartridge 107. The bottom of the filter tank 101 is fixed with a side-inverted T-shaped drain port 110, which is used for draining.

[0031] A cleaning component 2 extending into the inside of the filter bag 106 is provided below the filter tank 101. The cleaning component 2 is used to perform rinsing and cleaning operations on the filter bag 106.

[0032] Cleaning component 2 includes a wall scraping unit and a rinsing unit;

[0033] The wall scraping unit is used to scrape the inner wall surface of the filter bag 106, thereby scraping off impurities from the inner wall of the filter bag 106.

[0034] The rinsing unit is used to rinse the inner wall surface of the filter bag 106 and the bottom side of the inner wall of the filter tank 101.

[0035] The wall scraping unit includes a water supply pipe 201, an inverted U-shaped scraper 202, a driven gear 205, a drive motor 206, a mounting bracket 207, and a driving gear 208;

[0036] Water supply pipe 201 is distributed inside the vertical part of the side-inverted T-shaped drain outlet 110 and passes through the upper and lower ends of the vertical part of the side-inverted T-shaped drain outlet 110. The top of the water supply pipe 201 extends to the inside of the filter bag 106 and is fixedly connected to the inverted U-shaped scraper 202. The inverted U-shaped scraper 202 is in contact with the inner wall of the filter bag 106. The rotation of the inverted U-shaped scraper 202 is used to scrape the inner wall of the filter bag 106.

[0037] The bottom of the inverted U-shaped scraper 202 extends to the bottom of the side-inverted T-shaped drain port 110. The driven gear 205 is located below the side-inverted T-shaped drain port 110 and fixed to the outside of the inverted U-shaped scraper 202. The drive motor 206 is located below the filter tank 101 and is fixedly connected to the support leg of the filter tank 101 through the mounting bracket 207.

[0038] The driving gear 208 is fixed to the bottom end of the output shaft of the drive motor 206 and meshes with the driven gear 205. It is driven by the drive motor 206 to drive the water pipe 201 and the inverted U-shaped scraper 202 to rotate as a whole.

[0039] The flushing unit includes an inverted U-shaped nozzle 203 and a spray head 204;

[0040] The inverted U-shaped nozzle 203 is fixed to the outside of the water supply pipe 201 and distributed inside the filter bag 106. The bottom of the inverted U-shaped nozzle 203 extends to the area below the annular seat 105.

[0041] Multiple nozzles 204 are provided, and the multiple nozzles 204 are evenly distributed along the trajectory of the inverted U-shaped nozzle 203. The nozzles 204 are connected to the inner cavity of the inverted U-shaped nozzle 203 and the water supply pipe 201.

[0042] In this embodiment, it should be noted that the bottom of the water supply pipe 201 is connected to the external pipeline through a rotating connector, and the side port of the side-inverted T-shaped drain outlet 110 is connected to the external drain pipeline.

[0043] The operating principle of liquid fertilizer filtration is as follows:

[0044] Liquid fertilizer is transported to the inside of filter tank 101 through inlet 108, and passes through annular seat 105 to the inside of filter bag 106. After being filtered by filter bag 106, it passes through metal filter cylinder 107 and is finally discharged through outlet 109. The filtered impurities adhere to the inside of filter bag 106 or settle at the bottom of filter tank 101.

[0045] When too many impurities adhere to the inside of the filter bag 106, causing filtration to be blocked, the side-inverted T-shaped drain port 110 is opened to connect with the external drain pipe, the pipe connected to the water supply pipe 201 is controlled to be connected and the water pump is started. At the same time, the drive motor 206 is started. At this time, the drive motor 206 drives the driven gear 205, the water supply pipe 201, the inverted U-shaped scraper 202, and the inverted U-shaped spray pipe 203 to rotate as a whole through the drive gear 208.

[0046] The rotating inverted U-shaped scraper 202 can scrape the inner surface of the filter bag 106. At the same time, the external water pump delivers water to the inside of the delivery pipe 201 and sprays it out through the inverted U-shaped spray pipe 203 and nozzle 204. The circumferentially rotating inverted U-shaped spray pipe 203 and nozzle 204 can make the water flow form a full-range rinsing operation on the inner wall of the filter bag 106 and the inner wall and side of the bottom of the filter tank 101.

[0047] The scraped-off and washed-off impurities can be discharged through the side-inverted T-shaped drain port 110, thereby achieving efficient cleaning operation (it should be noted that a rotating seal is provided at the contact position between the water supply pipe 201 and the bottom of the side-inverted T-shaped drain port 110 to ensure the relative sealing between the water supply pipe 201 and the side-inverted T-shaped drain port 110).

[0048] Please refer to this carefully. Figures 2-3 The inverted U-shaped nozzle 203 and the inverted U-shaped scraper 202 are staggered along the circumference, and the outer diameter of the inverted U-shaped nozzle 203 is smaller than the inner diameter of the filter bag 106. The nozzle 204 is not related to the inner wall surface structure of the filter bag 106.

[0049] In this embodiment: This structure prevents the nozzle 204 from causing wear to the filter bag 106. At the same time, by maintaining a certain distance between the nozzle 204 and the filter bag 106, the water flow sprayed from the nozzle 204 can be better diffused to impact the filter bag 106, thereby ensuring a highly efficient rinsing effect.

[0050] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A filtering device for liquid fertilizer production, comprising a bag filter (1) composed of a filtering tank (101), a top cover (102), an annular seat (105), a filter bag (106), and a metal filter cylinder (107), the top cover (102) is fixed to the top of the filtering tank (101) and is used to block the opening at the top of the filtering tank (101), the annular seat (105) is fixed to the inner side of the filtering tank (101) near the bottom, the annular seat (105) is used to provide support for the installation of the filter bag (106) and the metal filter cylinder (107), the filter bag (106) and the metal filter cylinder (107) are installed upside down on the top of the annular seat (105), and the filter bag (106) is located inside the metal filter cylinder (107), characterized in that, The bottom of the filter tank (101) is fixed with a side inverted T-shaped blowdown port (110) for blowdown operation; A cleaning assembly (2) extending to the inside of the filter bag (106) is arranged below the filter tank (101) for realizing the flushing cleaning operation of the filter bag (106); The cleaning assembly (2) comprises a wall scraping unit and a flushing unit; The wall scraping unit is used for wall scraping operation on the inner wall surface of the filter bag (106) to realize the scraping operation of impurities on the inner wall of the filter bag (106); The flushing unit is used for flushing operation on the inner wall surface of the filter bag (106) and the inner wall bottom side of the filter tank (101).

2. The filtering device for liquid fertilizer production according to claim 1, characterized in that, The wall scraping unit comprises a water delivery pipe (201), an inverted U-shaped scraper (202), a driven gear (205), a driving motor (206), a mounting bracket (207), and a driving gear (208); The water delivery pipe (201) is distributed inside the vertical part of the side inverted T-shaped blowdown port (110) and penetrates the upper and lower ends of the vertical part of the side inverted T-shaped blowdown port (110), the top of the water delivery pipe (201) extends to the inside of the filter bag (106) and is fixedly connected with the inverted U-shaped scraper (202), the inverted U-shaped scraper (202) is attached to the inner wall of the filter bag (106), and the wall scraping operation on the inner wall of the filter bag (106) is realized by rotating the inverted U-shaped scraper (202); The bottom of the inverted U-shaped scraper (202) penetrates to the bottom below the side inverted T-shaped blowdown port (110), the driven gear (205) is located below the side inverted T-shaped blowdown port (110) and is fixed outside the inverted U-shaped scraper (202), and the driving motor (206) is located below the filter tank (101) and is fixedly connected to the leg of the filter tank (101) through the mounting bracket (207); The driving gear (208) is fixed to the bottom end of the output shaft of the driving motor (206) and is engaged with the driven gear (205), and the driving gear (208) is used for driving the overall rotation of the water delivery pipe (201) and the inverted U-shaped scraper (202) by the operation of the driving motor (206).

3. The filtering device for liquid fertilizer production according to claim 2, characterized in that, The flushing unit comprises an inverted U-shaped spray pipe (203) and a spray head (204); The inverted U-shaped spray pipe (203) is fixed outside the water delivery pipe (201) and is distributed inside the filter bag (106), and the bottom of the inverted U-shaped spray pipe (203) extends to the area below the annular seat (105); The spray head (204) is provided with a plurality of spray heads (204) which are uniformly distributed along the track of the inverted U-shaped spray pipe (203), and the spray head (204) is in communication with the inner cavities of the inverted U-shaped spray pipe (203) and the water delivery pipe (201).

4. The filtering device for liquid fertilizer production according to claim 3, characterized in that, The inverted U-shaped spray pipe (203) and the inverted U-shaped scraper (202) are distributed in a staggered manner in the circumferential direction, the outer wall diameter of the inverted U-shaped spray pipe (203) is smaller than the inner diameter of the filter bag (106), and the spray head (204) is not in surface structure with the inner wall of the filter bag (106).

5. The filtering device for liquid fertilizer production according to claim 1, characterized in that, The outer wall of the filter tank (101) is fixed with a liquid inlet (108) and a liquid outlet (109) respectively, the liquid inlet (108) and the liquid outlet (109) are communicated with the inner cavity of the filter tank (101), and the liquid inlet (108) and the liquid outlet (109) are located below and above the port of the filter tank (101) respectively. The top of the top cover (102) is provided with a pressure measuring port (103), and the inner wall of the top cover (102) is fixed with a pressing part (104) for pressing the metal filter cartridge (107).

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