Impurity removing and filtering device for ammonium dihydrogen phosphate slurry

Abstract

The utility model discloses an ammonium dihydrogen phosphate slurry impurity removal filtration device, including barrel, baffle groove and magnetic bar fixing hole, baffle groove is vertically provided in the barrel, the barrel forms inner cavity A and inner cavity B by setting baffle groove, the inner cavity A and inner cavity B both have magnetic bar fixing hole at the bottom. According to the implementation of the utility model, the tubular iron removal filtering equipment which can be in close contact with materials is adopted. Metal particles in the slurry can be effectively adsorbed before and after filtration; the working conditions of high-temperature and corrosive media can be met; impurities with large particle sizes can be filtered firstly, and then metal particles with small particle sizes can be adsorbed; the cover plate is convenient to disassemble and assemble, and iron removal filtering equipment is convenient to regularly check and clean.

Description

Technical Field

[0001] The utility model relates to a filter device for removing impurities from diammonium phosphate slurry. Background Art

[0002] In the prior art, electronic-grade diammonium phosphate products are produced using purified wet-process phosphoric acid, liquid ammonia and desalted water as raw materials. The byproduct mother liquor reflux system causes continuous enrichment of metal impurities. The scouring of pipeline slurry transportation, equipment operation wear and maintenance and overhaul processes may introduce a large amount of metal particles into the diammonium phosphate slurry, resulting in the product failing to meet the electronic-grade standard. In addition, electronic-grade diammonium phosphate is currently used as a raw material for the production of lithium battery precursors. The self-discharge of metal particles will cause the pores of the lithium battery diaphragm to be blocked, and even cause a local short circuit, threatening the safety of the battery. Therefore, the production process control requirements for electronic-grade diammonium phosphate are extremely high, and the control of metal particles is also extremely strict. The temperature range of the diammonium phosphate slurry after the neutralization reaction of ammonia and acid is 90-110°C, and the pH value is 4.0-5.0. After the slurry temperature is lowered, crystals begin to precipitate. When using a common iron remover for metal impurity removal, the number of metal particles that can be intercepted is limited.

[0003] The Chinese patent with the publication number CN214416673U discloses a device for removing impurities from iron salt, a raw material for producing iron phosphate, including an impurity removal cylinder, a partition plate inside the cylinder, a discharge pipe at the bottom, a primary impurity removal chamber above the partition plate, a secondary impurity removal chamber below the cylinder, a primary magnetic axis rotating inside the primary impurity removal chamber, a plurality of primary magnetic rods on the primary magnetic axis, a secondary main magnetic axis rotating inside the secondary impurity removal chamber, a plurality of secondary main magnetic rods on the upper part of the secondary main magnetic axis, a cross-shaped bracket fixed at the lower part, a secondary sub-magnetic axis rotating at the four corners of the cross-shaped bracket, a plurality of secondary sub-magnetic rods on the secondary sub-magnetic axis, and a tertiary magnetic axis rotating inside the discharge pipe. The cavity-type impurity removal device has the problem of occupying a large area. When the cavity-type magnetic rod is used for iron removal in the actual production process, the contact area between the magnetic rod and the slurry is limited. The larger the flow rate, the shorter the contact time, and the worse the demagnetization effect. Therefore, a device is needed that can filter out impurities with larger particle sizes first and then adsorb metal particles with small particle sizes. It is suitable for special working conditions with high temperature, corrosive slurry that is easy to crystallize and has easy operation for iron removal and filtration. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a filter device for removing impurities from diammonium phosphate slurry.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model provides a filter device for removing impurities from diammonium phosphate slurry, comprising a cylinder, a baffle groove and a fixing hole, wherein the baffle groove is arranged in the cylinder, and the cylinder forms an inner cavity A and an inner cavity B by arranging the baffle groove, and the inner cavity A and the inner cavity B are both provided with fixing holes at the bottom.

[0007] Preferably, a feed port A is provided on one side of the cylinder, and a discharge port B is provided on the other side of the cylinder.

[0008] Preferably, the cylinder and the cover plate are connected by bolts.

[0009] Preferably, bolt holes A are provided on the cover plate.

[0010] Preferably, a bolt hole B is provided at one end of the cylinder.

[0011] Preferably, the baffle groove comprises a baffle, and the baffle is inserted into the baffle groove.

[0012] The beneficial effects of the utility model are: a tubular iron removal filter device in close contact with the material is used. The metal particles in the slurry can be effectively adsorbed before and after filtration; it can meet the working conditions of high temperature and corrosive media; it can meet the requirements of filtering impurities with larger particle sizes first and then adsorbing metal particles with smaller particle sizes; the cover plate is easy to disassemble and assemble, and it is convenient to regularly check and clean the iron removal filter device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] In the figure: 1-cylinder; 2-baffle groove; 3-magnetic rod fixing hole; 4-cover plate; 51-bolt hole A; 5-bolt hole B; 6-baffle; 7-feed port; 8-discharge port; 9-inner cavity A; 91-inner cavity B. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and specific examples:

[0016] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0017] See also Figure 1 shown.

[0018] The utility model discloses a filter device for removing impurities from diammonium phosphate slurry, comprising a barrel 1, a baffle groove 2 and a magnetic rod fixing hole 3, wherein the baffle groove 2 is vertically arranged in the barrel 1, and the barrel 1 forms an inner cavity A9 and an inner cavity B91 by arranging the baffle groove 2, and the inner cavity A9 and the inner cavity B91 are both provided with a magnetic rod fixing hole 3 at the bottom, and the magnetic rod is placed in the magnetic rod fixing hole 3, so that the metal particles in the slurry can be effectively adsorbed before and after filtration.

[0019] A feed port A7 is arranged on one side of the cylinder 1, and a discharge port B8 is arranged on the other side of the cylinder 1. Both the feed port A7 and the discharge port B8 are provided with flange interfaces. After the feed port A7 and the discharge port B8 are connected with the slurry pipeline flange, the material can be fed. The ammonium phosphate slurry with a temperature of 90-110°C and a pH value of 4.0-5.0 enters from the feed port A7 at the upper part of the cylinder 1 and flows out from the discharge port B8 in the middle.

[0020] The cylinder 1 is connected to the cover plate 4 by bolts. After the cover plate 4 is closed, the bolts are inserted into the bolt holes A51 and B5 and are fastened with nuts.

[0021] The cover plate 4 is provided with a bolt hole A51, and one end of the cylinder body 1 is provided with a bolt hole B5, so that the cover plate 4 is easy to disassemble and assemble, and the cylinder body 1 of the iron removal and filtering equipment is convenient for regular inspection and cleaning.

[0022] The baffle groove 2 includes a baffle 6, which is vertically inserted into the baffle groove 2 and fixed to the baffle 6 by a corrosion-resistant filter screen. The filter screen is inserted into the baffle groove 2 on the inlet side. The filter screen can be selected from different materials and mesh sizes according to actual needs to effectively intercept large-size particles.

[0023] The cylinder 1 has a diameter of 705 mm and is made of S31608.

Claims

1. A filter device for removing impurities from diammonium phosphate slurry, characterized in that: The invention comprises a cylinder (1), a baffle groove (2) and a fixing hole (3), wherein the baffle groove (2) is arranged in the cylinder (1), and the cylinder (1) forms an inner cavity A (9) and an inner cavity B (91) by arranging the baffle groove (2), and the fixing hole (3) is arranged in the inner cavity of both the inner cavity A (9) and the inner cavity B (91); the baffle groove (2) comprises a baffle (6), and the baffle (6) is inserted in the baffle groove (2); a magnetic rod is placed in the fixing hole (3), and is fixed to the baffle (6) by using a corrosion-resistant filter screen.

2. The impurity removal and filtering device for diammonium phosphate slurry according to claim 1, characterized in that: A feed inlet A (7) is provided on one side of the cylinder (1), and a discharge outlet B (8) is provided on the other side of the cylinder (1).

3. The impurity removal and filtering device for diammonium phosphate slurry according to claim 1, characterized in that: A cover plate (4) is arranged on the cylinder (1), and the cylinder (1) and the cover plate (4) are connected by bolts.

4. The impurity removal and filtering device for diammonium phosphate slurry according to claim 3, characterized in that: The cover plate (4) is provided with a bolt hole A (51).

5. The impurity removal and filtering device for diammonium phosphate slurry according to claim 1, characterized in that: A bolt hole B (5) is provided at one end of the cylinder (1).

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