Device for removing organic matters in products produced by wet-process phosphoric acid production method

Abstract

According to the device for removing the organic matter in the wet-process phosphoric acid production method product, the interior of a device body is divided into a first area, a second area, a third area and a fourth area through partition plates, a first-area liquid phase channel and a first-area gas phase channel are arranged on the partition plate between the first area and the second area, and a second-area liquid phase channel and a second-area gas phase channel are arranged on the partition plate between the second area and the third area; a third-area liquid phase channel and a third-area gas phase channel are arranged on a partition plate between the third area and the fourth area, and a fourth-area overflow port is formed in the side wall of the fourth area; a first-area bubble channel and a second-area bubble channel are arranged on the side wall of the first area and the side wall of the second area respectively and both connected to the defoaming tank. By adopting the structure and adopting a physical separation method, organic matters in the wet-process phosphoric acid production process can be effectively removed, so that the use amount of a defoaming agent is reduced, the production cost is reduced, and meanwhile, the influence on the environment is also reduced.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, specifically to a device for removing organic matter from products produced by the wet process of phosphoric acid production. Background Technology

[0002] The wet-process phosphoric acid production process involves reacting sulfuric acid with phosphate rock to produce phosphoric acid and the byproduct phosphogypsum. However, during the flotation of phosphate rock, a large amount of frother is typically added, and the phosphate rock itself contains a considerable amount of organic matter. When the phosphate rock reacts with sulfuric acid in the reaction tank, these factors combine to generate a large number of bubbles, easily causing blockage of the gas phase channels. To address this issue, defoamers are often used in industrial practice to eliminate foam.

[0003] Furthermore, the final product of wet-process phosphoric acid production, "phosphoric acid," often requires pretreatment to remove organic matter before it can be used in the production of purified phosphoric acid. Simultaneously, phosphogypsum, a byproduct, also needs to have its organic matter removed through methods such as flotation to meet acceptable whiteness standards and be suitable for a wider range of industrial applications. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an apparatus for removing organic matter from products produced by the wet process of phosphoric acid production. Through physical separation, the organic matter in the wet process of phosphoric acid production can be effectively removed, which reduces the amount of defoamer used, lowers production costs, and also reduces the impact on the environment.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an apparatus for removing organic matter from the product of wet-process phosphoric acid production. The main body of the apparatus is divided into a first zone, a second zone, a third zone, and a fourth zone by partitions. The partition between the first zone and the second zone is provided with a liquid phase channel and a gas phase channel for the first zone. The partition between the second zone and the third zone is provided with a liquid phase channel and a gas phase channel for the second zone. The partition between the third zone and the fourth zone is provided with a liquid phase channel and a gas phase channel for the third zone. An overflow port for the fourth zone is provided on the side wall of the fourth zone.

[0006] The sidewalls of Zone 1 and Zone 2 are respectively provided with Zone 1 bubble channel and Zone 2 bubble channel, and both Zone 1 bubble channel and Zone 2 bubble channel are connected to the defoaming tank.

[0007] In the preferred embodiment, the first zone is provided with a reflux slurry inlet, a slurry inlet, and a acid return inlet, and the fourth zone is provided with a slurry reflux outlet;

[0008] The reflux slurry inlet of Zone 1 and the reflux slurry outlet of Zone 4 are connected by an axial flow pump.

[0009] In a preferred embodiment, the low point of the first bubble passage and the second bubble passage is higher than the high point of the first liquid phase passage, the second liquid phase passage and the third liquid phase passage.

[0010] In a preferred embodiment, the low point of the fourth overflow is higher than the high point of the first liquid phase passage, the second liquid phase passage and the third liquid phase passage, so that all the bubbles pass through the gas phase passage to the defoaming tank.

[0011] The high point of the fourth overflow is lower than the low point of the first bubble passage and the second bubble passage, so that a small amount of slurry overflows to the defoaming tank through the bubbles, and most of the slurry cannot enter the defoaming tank.

[0012] In a preferred embodiment, the defoaming tank is provided with a stirring mechanism, and the stirring mechanism is a stirring paddle driven by a motor.

[0013] In a preferred embodiment, the upper part of the side wall of the defoaming tank is provided with a negative pressure pipe and a hot water spray head, the negative pressure pipe is connected to a negative pressure mechanism, and the hot water spray head is connected to a hot water tank.

[0014] The lower part of the side wall of the defoaming tank is provided with a discharge pipe.

[0015] In a preferred embodiment, the low point of the third gas phase passage is above the center of the first gas phase passage and the second gas phase passage.

[0016] The device for removing organic matter in wet-process phosphoric acid production method provided by the utility model has the following beneficial effects by adopting the above structure:

[0017] (1) By designing specific bubble passages and overflow ports, the foam containing a large amount of organic matter can be effectively collected and guided to the defoaming tank for separate treatment, thereby greatly reducing the dependence on chemical defoaming agents in the reaction process. This not only reduces the production cost, but also reduces the environmental burden caused by the use of defoaming agents;

[0018] (2) In the defoaming tank, the organic matter can be treated separately after reacting with a small amount of phosphate rock and sulfuric acid, which provides the possibility for the recovery of organic matter and realizes the effective reuse of resources, thereby increasing economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further described below in combination with the drawings and examples:

[0020] Figure 1 It is the whole structure schematic diagram of the utility model.

[0021] In the figure: a region 1, a region liquid phase channel 2, a region gas phase channel 3, a region bubble channel 4, a second region 5, a second region liquid phase channel 6, a second region gas phase channel 7, a second region bubble channel 8, a third region 9, a third region liquid phase channel 10, a third region gas phase channel 11, a defoaming tank 12, a fourth region 13, a fourth region overflow 14, a stirring mechanism 15, a negative pressure pipe 16, a hot water nozzle 17, a discharge pipe 18. DETAILED DESCRIPTION

[0022] As Figure 1 In the present application, a device for removing organic matter in products of wet-process phosphoric acid production method, a device main body is divided into a region 1, a second region 5, a third region 9 and a fourth region 13 by a partition, a region liquid phase channel 2 and a region gas phase channel 3 are arranged on the partition between the region 1 and the second region 5, a second region liquid phase channel 6 and a second region gas phase channel 7 are arranged on the partition between the second region 5 and the third region 9, a third region liquid phase channel 10 and a third region gas phase channel 11 are arranged on the partition between the third region 9 and the fourth region 13, and a fourth region overflow 14 is arranged on the side wall of the fourth region 13.

[0023] A region bubble channel 4 and a second region bubble channel 8 are arranged on the side wall of the region 1 and the second region respectively, and the region bubble channel 4 and the second region bubble channel 8 are connected to the defoaming tank 12.

[0024] In the preferred embodiment, the region 1 is provided with a backflow slurry backflow inlet, a slurry inlet and an acid return inlet, and the fourth region 13 is provided with a slurry backflow outlet.

[0025] The backflow slurry backflow inlet of the region 1 and the slurry backflow outlet of the fourth region 13 are connected in the form of axial flow pump transportation.

[0026] In the preferred embodiment, the low point height of the region bubble channel 4 and the second region bubble channel 8 is higher than the high point height of the region liquid phase channel 2, the second region liquid phase channel 6 and the third region liquid phase channel 10.

[0027] In the preferred embodiment, the low point height of the fourth region overflow 14 is higher than the high point height of the region liquid phase channel 2, the second region liquid phase channel 6 and the third region liquid phase channel 10.

[0028] The high point height of the fourth region overflow 14 is lower than the low point height of the region bubble channel 4 and the second region bubble channel 8.

[0029] In the preferred embodiment, the defoaming tank 12 is provided with a stirring mechanism 15, and the stirring mechanism 15 is a stirring paddle driven by a motor.

[0030] In the preferred embodiment, the side wall of the defoaming tank 12 is provided with a negative pressure pipe 16 and a hot water nozzle 17 at the upper part, the negative pressure pipe 16 is connected to a negative pressure mechanism, and the hot water nozzle 17 is connected to a hot water tank.

[0031] The side wall of the defoaming tank 12 is provided with a discharge pipe 18 at the lower part.

[0032] In a preferred embodiment, the low point of the third zone gas phase channel 11 is above the center of the first zone gas phase channel 3 and the second zone gas phase channel 7.

[0033] The device comprises four main zones (the first zone 1, the second zone 5, the third zone 9 and the fourth zone 13) separated by partitions. Each partition between adjacent zones is provided with a liquid phase channel and a gas phase channel, namely the first zone liquid phase channel 2 and the first zone gas phase channel 3, the second zone liquid phase channel 6 and the second zone gas phase channel 7, and the third zone liquid phase channel 10 and the third zone gas phase channel 11. In addition, each zone is also provided with channels with specific functions, such as the first zone bubble channel 4 and the second zone bubble channel 8, which are connected to the defoaming tank 12 for processing foam containing a large amount of organic matter.

[0034] During operation, the phosphate ore reacts with sulfuric acid in the first zone 1, which is provided with a backflow slurry backflow inlet, an ore slurry inlet and an acid return inlet. As the reaction proceeds, the generated foam passes through the first zone bubble channel 4 into the defoaming tank 12. Similarly, the second zone 5 is also provided with similar structures to allow the foam to flow into the defoaming tank 12 through the second zone bubble channel 8.

[0035] The fourth zone 13 is provided with a slurry backflow outlet and a fourth zone overflow 14, which ensures that a small amount of slurry can enter the defoaming tank 12 along with the foam for further processing, while the majority of the slurry does not enter the defoaming tank 12, maintaining the continuity and stability of production.

[0036] In the above embodiment, the low point of the first zone bubble channel 4 and the second zone bubble channel 8 is set to be higher than the high point of each liquid phase channel, ensuring that only foam and a small amount of slurry can enter the defoaming tank 12;

[0037] The defoaming tank 12 is provided with a stirring mechanism 15 driven by a motor to ensure that the bubbles are fully stirred and to prevent sediment from clogging the bottom. In addition, the upper part of the side wall of the defoaming tank is provided with a negative pressure pipe 16 and a hot water spray head 17 connected to a negative pressure mechanism and a hot water tank, respectively, to help more effectively eliminate foam. The lower part of the side wall is provided with a discharge pipe 18 for easy discharge of the treated material;

[0038] The low point of the third zone gas phase channel 11 is set to be above the center of the first zone gas phase channel 3 and the second zone gas phase channel 7, ensuring that the foam in the third zone can also smoothly pass through the corresponding channel into the defoaming tank 12 for processing.

[0039] Through the above specific embodiments, the present application not only realizes effective control of the foam generated in the production process of wet-process phosphoric acid, reduces the use of chemical defoaming agents, but also improves the quality of the final product and promotes the recycling of resources.

Claims

1. A device for removing organic matter from products of a wet-process phosphoric acid production method, the device body being divided into a first zone (1), a second zone (5), a third zone (9) and a fourth zone (13) by partitions, characterized in that: The partition between the first zone (1) and the second zone (5) is provided with a first zone liquid phase passage (2) and a first zone gas phase passage (3), the partition between the second zone (5) and the third zone (9) is provided with a second zone liquid phase passage (6) and a second zone gas phase passage (7), the partition between the third zone (9) and the fourth zone (13) is provided with a third zone liquid phase passage (10) and a third zone gas phase passage (11), and the side wall of the fourth zone (13) is provided with a fourth zone overflow port (14). The side wall of the first zone (1) and the second zone is respectively provided with a first zone bubble passage (4) and a second zone bubble passage (8), and the first zone bubble passage (4) and the second zone bubble passage (8) are connected to a defoaming tank (12).

2. The apparatus for removing organic matter from the product of a wet-process phosphoric acid production process according to claim 1, characterized in that: The first zone (1) is provided with a backflow slurry backflow inlet, a slurry inlet and an acid return inlet, and the fourth zone (13) is provided with a slurry backflow outlet. The backflow slurry backflow inlet of the first zone (1) and the slurry backflow outlet of the fourth zone (13) are connected in the form of axial flow pump transportation.

3. The apparatus for removing organic matter from the product of a wet phosphoric acid production process according to claim 1, characterized in that: The low point height of the first zone bubble passage (4) and the second zone bubble passage (8) is higher than the high point height of the first zone liquid phase passage (2), the second zone liquid phase passage (6) and the third zone liquid phase passage (10).

4. The apparatus for removing organic matter from the product of a wet phosphoric acid production process according to claim 1, characterized in that: The low point height of the fourth zone overflow port (14) is higher than the high point height of the first zone liquid phase passage (2), the second zone liquid phase passage (6) and the third zone liquid phase passage (10). The high point height of the fourth zone overflow port (14) is lower than the low point height of the first zone bubble passage (4) and the second zone bubble passage (8).

5. The apparatus for removing organic matter from the product of a wet phosphoric acid production process according to claim 1, characterized in that: The defoaming tank (12) is provided with a stirring mechanism (15), and the stirring mechanism (15) is a stirring paddle driven by a motor.

6. The apparatus for removing organic matter from the product of a wet phosphoric acid production process according to claim 1 or 5, characterized in that: The upper part of the side wall of the defoaming tank (12) is provided with a negative pressure pipe (16) and a hot water spray head (17), the negative pressure pipe (16) is connected to a negative pressure mechanism, and the hot water spray head (17) is connected to a hot water tank. The lower part of the side wall of the defoaming tank (12) is provided with a discharge pipe (18).

7. The apparatus for removing organic matter from the product of a wet phosphoric acid production process according to claim 1, characterized in that: The low point height of the third zone gas phase passage (11) is above the center of the first zone gas phase passage (3) and the second zone gas phase passage (7).

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