Washing system for washing aluminum hydroxide filter cake

Abstract

The utility model relates to the technical field of aluminum oxide industrial production, and particularly discloses a washing system for washing an aluminum hydroxide filter cake, which aims at solving the problem that the local water washing of the filter cake is insufficient or the local water content of the filter cake is too high in the washing process of the existing aluminum hydroxide filter cake, and comprises a washing box, a water inlet pipe penetrates through the top of the washing box, and a water outlet hole is formed in the bottom of the washing box; a sawtooth buffer plate and a gate plate are sequentially erected in the washing box in the direction from the bottom of the washing box to the bottom of the washing box, the sawtooth buffer plate is erected in the middle of the washing box in the horizontal direction, and the gate plate is vertically arranged at the inner bottom of the washing box. According to the aluminum hydroxide filter cake washing system, existing aluminum hydroxide filter cake washing equipment is optimized and improved, the washing system is arranged close to the periphery of the surface of a flat plate, less water is distributed on an inner ring, more water is distributed on an outer ring, a filter cake is uniformly washed through components such as a sawtooth buffer plate, the operation precision is higher, and the production efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of alumina industrial production, and specifically relates to a water washing system for washing aluminium hydroxide filter cake. BACKGROUND

[0002] In the process of industrialized production of alumina, the last process is to pump the aluminium hydroxide slurry sent from the decomposition section to a flat disc filter, and through multiple washing and solid-liquid separation, aluminium hydroxide containing a small amount of attached water (about 5%) and a small amount of attached alkali (about 0.05%) is obtained; then the above-mentioned aluminium hydroxide material is sent into a calcination furnace through a belt conveying system, and a qualified alumina product with a certain purity is produced after calcination, which can be sent to a warehouse for packaging.

[0003] In the above process, the filtered aluminium hydroxide filter cake is washed multiple times, and the washing effect in this step will directly affect the purity and other qualities of the final alumina product, thus playing a crucial role. The traditional washing method of aluminium hydroxide filter cake often has the problem of poor washing effect, resulting in high content of attached water and alkali in the filter cake, which not only affects the quality of the final alumina product, but also increases the cost of subsequent calcination.

[0004] For example, the patent with publication number CN117623357A provides a method for removing sodium oxalate on the surface of product aluminium hydroxide in alumina production, which involves the treatment process of placing the aluminium hydroxide filter cake on the surface of a flat disc and washing it with cold and hot water alternately. However, in actual application, it is found that using the existing flat disc surface for water distribution and washing, the washing water is difficult to be evenly distributed on the disc surface, i.e. the water flow is uneven, resulting in incomplete washing of the local filter cake and excessive water content in the other local filter cake. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the problem of insufficient water washing of local filter cake or excessive water content in local filter cake in the washing process of existing aluminium hydroxide filter cake. The present application provides a water washing system for washing aluminium hydroxide filter cake, which optimizes and improves the existing water washing equipment for aluminium hydroxide filter cake. The water washing system is arranged near the outer periphery of the flat disc surface, and through components such as sawtooth buffer plates, it realizes less water distribution in the inner circle and more water distribution in the outer circle, so that the filter cake is uniformly washed, and the operation precision is higher and the production efficiency is faster.

[0006] The utility model realizes the following technical solutions:

[0007] The utility model provides a kind of water washing system for aluminium hydroxide filter cake washing, including washing box, water inlet pipe is passed in the top of washing box, water outlet hole is opened in the bottom of washing box;Along the direction of the bottom of washing box to the bottom of washing box, sawtooth buffer plate and gate are sequentially erected in the inside of washing box, sawtooth buffer plate is erected in the middle of washing box along horizontal direction, and the gate is vertically set in the inner bottom of washing box.

[0008] Preferably, a pair of side walls of the sawtooth buffer plate is provided with a rack, and the rack includes a plurality of sawtooth blocks of different specifications.

[0009] Preferably, a pair of side walls of the sawtooth buffer plate away from the rack is provided with a shaft rod, the shaft rod is provided in the side wall of the washing box, and the sawtooth buffer plate is rotationally connected with the shaft rod or the shaft rod is rotationally connected with the side wall of the washing box.

[0010] Preferably, the rack and the water outlet hole are respectively arranged near different sides of the gate, so that the water flow can flow from the surface of the sawtooth buffer plate to the direction of the rack, and then flow out from the water outlet hole after flowing through the gate.

[0011] Preferably, a plurality of gates can be provided, and each gate corresponds to at least one water outlet hole, and the water outlet hole is always located on the side of the gate away from the rack.

[0012] Preferably, a plurality of lifting columns are embedded in the top of the gate, and the lifting columns can be lifted towards or away from the bottom of the sawtooth buffer plate.

[0013] Preferably, the bottom of the washing box is further provided with a water retaining dam, and the top of one side of the water retaining dam is arranged close to the water outlet hole, so that the water flow can flow to the water retaining dam after flowing out from the water outlet hole.

[0014] Preferably, the side of the water retaining dam away from the water outlet hole is arranged close to an aluminium hydroxide washing flat disc.

[0015] The technical solution of the utility model has the following beneficial effects:

[0016] The water washing system for aluminium hydroxide filter cake washing optimizes and improves the existing water washing equipment for aluminium hydroxide filter cake, reduces the cost required for technological innovation, and reduces the waste rate of original equipment elimination. The water washing system is arranged close to the outer periphery of the flat disc surface, and through the components such as sawtooth buffer plate, the water distribution in the inner circle is less and the water distribution in the outer circle is more, so that the filter cake is uniformly washed, and the operation precision is higher and the production efficiency is faster. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1A structure schematic diagram of the water washing system for washing the aluminum hydroxide filter cake in Embodiment 1;

[0018] Fig. 2 A structure schematic diagram of the sawtooth buffer plate in Embodiment 1;

[0019] Fig. 3 A side view structure schematic diagram of the washing box in Embodiment 1.

[0020] The figure mark: 1-washing box, 11-water outlet hole, 2-water inlet pipe, 3-sawtooth buffer plate, 31-rack, 32-sawtooth block, 33-shaft, 4-shutter, 41-lifting column, 5-water retaining dam. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be clearly and completely described below. Among them, the unmarked specific conditions in the embodiment are carried out according to conventional conditions or manufacturer's suggested conditions;The instruments and reagents used or raw materials are not marked by the manufacturer, which are conventional products that can be purchased in the market. The following is the specific embodiment combined with the drawings.

[0022] As shown in the figure, Figs. 1 to 3 The embodiment provides a kind of water washing system for washing aluminum hydroxide filter cake, including washing box 1, water inlet pipe 2 is arranged in washing box 1 top, and water outlet hole 11 is arranged in the bottom of washing box 1;Along the direction from the bottom of washing box 1 to the bottom of washing box 1, sawtooth buffer plate 3 and shutter 4 are sequentially arranged in the inside of washing box 1, and sawtooth buffer plate 3 is arranged in the middle of washing box 1 along horizontal direction, and shutter 4 is vertically arranged in the bottom of washing box 1.

[0023] In the embodiment, a pair of side walls of sawtooth buffer plate 3 is provided with rack 31, and rack 31 includes a plurality of different specifications of sawtooth block 32, so that the water flow is more uniform and continuous uniform speed to the bottom of washing box 1;A pair of side walls of sawtooth buffer plate 3 away from rack 31 is provided with shaft 33, and shaft 33 is arranged in the side wall of washing box 1, and the end of shaft 33 arranged out of washing box 1 is provided with motor and other driving devices, to provide driving force for the rotation connection between driving device and the side wall of washing box 1, and driving device belongs to conventional technical means, so that the person skilled in the art can select according to actual situation.

[0024] In the embodiment, a plurality of lifting columns 41 are embedded in the top of shutter 4, and lifting columns 41 can be lifted or lowered towards or away from the bottom of sawtooth buffer plate 3, and the water flow can be adjusted by adjusting the lifting or lowering of lifting columns 41, and lifting columns 41 also need to be assisted by driving device, and the person skilled in the art should realize the above work according to conventional technical means.

[0025] In the embodiment, the washing box 1 is further provided with a water retaining dam 5 at the bottom, one side of the water retaining dam 5 is arranged close to the water outlet hole 11, so that the water flow can flow to the water retaining dam 5 after flowing out of the water outlet hole 11; the other side of the water retaining dam 5 away from the water outlet hole 11 is arranged close to the aluminum hydroxide washing flat disc.

[0026] In the embodiment, the rack 31 and the water outlet hole 11 are arranged close to different sides of the gate plate 4 respectively, so that the water flow can flow from the surface of the sawtooth buffer plate 3 to the rack 31, and then flow out of the water outlet hole 11 after passing through the gate plate 4; further, a plurality of gate plates 4 can be arranged, and each gate plate 4 corresponds to at least one water outlet hole 11, and the water outlet hole 11 is always located at the side of the corresponding gate plate 4 away from the rack 31; in the embodiment, two gate plates 4 are arranged, and each of the two gate plates 4 is arranged with one water outlet hole 11 at the side away from the rack 31 of the sawtooth buffer plate 3, and the water outlet hole 11 is arranged along the inclined direction of the water retaining dam 5.

[0027] In use, the washing liquid is introduced into the washing box 1 from the water inlet pipe 2, and the water flow size of different areas can be adjusted by arranging sawtooth blocks 32 of different specifications, so that the entire flat disc surface can be washed more uniformly, the washing liquid flows from the center of the surface of the sawtooth buffer plate 3 to both sides, falls at the position of the rack 31, and flows to the gate plate 4, and the lifting column 41 of the gate plate 4 can again play a role in regulating the water flow, so that it flows out of the water outlet hole 11 and the water retaining dam 5 at a suitable speed and flow rate, and the water flow after the above regulation can be distributed uniformly in the form of a linear water curtain, so that the aluminum hydroxide filter cake can be washed more thoroughly.

[0028] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A water wash system for washing of aluminum hydroxide filter cake, characterized in that, Including washing box (1), the top of washing box (1) is provided with water inlet pipe (2), and the bottom of washing box (1) is provided with water outlet hole (11); Along the direction from the bottom of washing box (1) to the bottom of washing box (1), the inside of washing box (1) is sequentially provided with sawtooth buffer plate (3) and gate (4), the sawtooth buffer plate (3) is arranged in the middle of washing box (1) along the horizontal direction, and the gate (4) is vertically arranged on the inner bottom of washing box (1).

2. The water wash system for washing of aluminum hydroxide filter cake according to claim 1, characterized in that, A pair of side walls of the sawtooth buffer plate (3) is provided with rack (31), and the rack (31) comprises a plurality of different specifications of sawtooth blocks (32).

3. The water wash system for washing of aluminum hydroxide filter cake according to claim 2, characterized in that, The pair of side walls of the sawtooth buffer plate (3) away from the rack (31) is provided with shaft rod (33), the shaft rod (33) is provided in the side wall of the washing box (1), and the sawtooth buffer plate (3) and the shaft rod (33) or the shaft rod (33) and the side wall of the washing box (1) are rotationally connected.

4. The water wash system for washing of aluminum hydroxide filter cake according to claim 2, characterized in that, The rack (31) and the water outlet hole (11) are respectively arranged on different sides of the gate (4), so that the water flow can flow from the surface of the sawtooth buffer plate (3) to the direction of the rack (31), and then flow out from the water outlet hole (11) after flowing through the gate (4).

5. The water wash system for washing of aluminum hydroxide filter cake according to claim 4, characterized in that, A plurality of gates (4) can be provided, and each gate (4) corresponds to at least one water outlet hole (11), and the water outlet hole (11) is always located on the side away from the rack (31) of the corresponding gate (4).

6. The water wash system for washing of aluminum hydroxide filter cake according to claim 1, characterized in that, The top of the gate (4) is embedded with a plurality of lifting columns (41), and the lifting columns (41) can be lifted towards or away from the bottom of the sawtooth buffer plate (3).

7. The water wash system for washing of aluminum hydroxide filter cake according to any one of claims 1 to 6, characterized in that, The bottom of the washing box (1) is further provided with a water retaining dam (5), one side of the top of the water retaining dam (5) is arranged close to the water outlet hole (11), so that the water flow can flow to the water retaining dam (5) after flowing out from the water outlet hole (11).

8. The water wash system for washing of aluminum hydroxide filter cake according to claim 7, characterized in that, The side of the water retaining dam (5) away from the water outlet hole (11) is arranged close to the aluminum hydroxide washing flat plate.

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