CN213924534U - System for utilize ardealite preparation alpha-beta composite gypsum - Google Patents
System for utilize ardealite preparation alpha-beta composite gypsum Download PDFInfo
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- CN213924534U CN213924534U CN202022703517.0U CN202022703517U CN213924534U CN 213924534 U CN213924534 U CN 213924534U CN 202022703517 U CN202022703517 U CN 202022703517U CN 213924534 U CN213924534 U CN 213924534U
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Abstract
A system for preparing alpha-beta composite gypsum by using phosphogypsum comprises a mixing tank, a crystal rotating bin and a dewatering bin, wherein a feeding pipe is arranged at the top of the mixing tank, the mixing tank is connected with the crystal rotating bin through a feeding pipe, the crystal rotating bin is connected with dewatering through a feeding pipe, and a discharging pipe is arranged at the bottom of the dewatering bin; a first stirring motor is arranged at the top of the mixing tank, a motor shaft of the first stirring motor is connected with a rotating shaft vertically arranged in the mixing tank through a shaft, and stirring blades are arranged on the rotating shaft; the bottom of the crystal rotating bin is provided with a first air inlet pipe, and the outer wall of the crystal rotating bin is coated with a heat-insulating jacket and a temperature measuring instrument; and a second air inlet pipe is arranged on the side wall of the dewatering bin and connected with high-temperature dry air, a second stirring motor is arranged at the top of the dewatering bin, and the second stirring motor is in transmission connection with a stirring system in the dewatering bin. The novel structure is adopted, the problem of recycling of the phosphogypsum is solved, and the purpose of producing the alpha-beta composite gypsum with low energy consumption and high efficiency is realized.
Description
Technical Field
The utility model relates to a building material preparation technical field, specifically be a system for utilize ardealite preparation alpha-beta composite gypsum.
Background
In the production process of high-concentration phosphate fertilizer, phosphate rock and sulfuric acid are reacted to generate phosphoric acid, and the byproduct calcium sulfate is generally called phosphogypsum. The phosphogypsum is yellow-white, light grey-white or black grey fine powdery solid, the main component of the phosphogypsum is CaSO4 & nH2O, the mass fraction of the phosphogypsum is usually more than 85 percent, and the phosphogypsum is similar to natural gypsum; generally, the water content of the water-soluble polymer is 20 to 30 percent. According to different wet-process phosphoric acid production processes, phosphogypsum crystals have dihydrate (CaSO 4. nH 2O), hemihydrate (CaSO 4. 0.5H 2O) and other forms, the dihydrate process is mostly used in the prior wet-process phosphoric acid production, therefore, the main component of the phosphogypsum is CaSO 4. nH2O, and the phosphogypsum also contains secondary components such as phosphorus, fluorine, silicon oxide, aluminum oxide, ferric oxide, uranium, radium, cadmium, lead, copper, organic matters and the like, and the phosphogypsum is a byproduct of about 4.5 to 5 tons per 1 ton of phosphoric acid (calculated by 100 percent P2O 5) produced, and the pH value is about 1.5 to 3.5, wherein soluble phosphorus and fluorine are main factors causing environmental pollution, and the eutectic phosphorus is generated in the process of converting hemihydrate gypsum prepared from phosphogypsum into dihydrate gypsum by adding water, the crystal habit of the dihydrate gypsum is seriously influenced, and the phosphogypsum is a main reason for difficult effective utilization of the traditional building field, so the resource utilization of the phosphogypsum is still a worldwide problem. Is also one of the key factors for restricting the sustainable development of the phosphorus chemical industry.
The dihydrate gypsum can be converted into the hemihydrate gypsum under the condition of heating, the dihydrate gypsum can be converted into alpha-hemihydrate gypsum when being heated in pressurized steam or in a medium with acid and salt, and the beta-hemihydrate gypsum is generated when being heated and dehydrated under a dry environment, so that the alpha-hemihydrate gypsum and the beta-hemihydrate gypsum are two extreme crystal forms of the gypsum, and although the two have no essential difference in atomic sequence, the loose or compact atomic structure sequence of the alpha-hemihydrate gypsum and the beta-hemihydrate gypsum make huge difference in macroscopic view.
In the process of preparing alpha-beta composite gypsum by using conventional phosphogypsum, the phosphogypsum needs to be mixed with a crystal transformation agent and a crystal seed in advance, the efficiency of conventional mixing equipment is low, the mixing time is long, and sufficient mixing cannot be guaranteed, so that the subsequent crystal transformation quality is directly reduced.
In addition, in the conventional preparation method, high-pressure equipment is required for dehydration or solution dehydration, the energy consumption in the whole process is high, and the energy-saving and environment-friendly purpose of phosphogypsum recycling is violated.
Disclosure of Invention
The utility model aims to solve the technical problem that a system for utilize ardealite preparation alpha-beta composite gypsum is provided, the difficult problem of recycling of ardealite has been solved, low energy consumption, efficient alpha-beta composite gypsum production purpose have been realized.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a system for preparing alpha-beta composite gypsum by using phosphogypsum comprises a mixing tank, a crystal rotating bin and a dewatering bin, wherein a feeding pipe is arranged at the top of the mixing tank, the bottom of the mixing tank is connected with the top of the crystal rotating bin through a feeding pipe, the bottom of the crystal rotating bin is connected with the top of the dewatering bin through a feeding pipe, and a discharging pipe is arranged at the bottom of the dewatering bin;
a first stirring motor is arranged at the top of the mixing tank, the motor shaft of the first stirring motor extends downwards into the mixing tank and is connected with a rotating shaft vertically arranged in the mixing tank through a shaft, and stirring blades are arranged on the rotating shaft;
the bottom of the crystal rotating bin is provided with two first air inlet pipes, the two first air inlet pipes are respectively connected with sub-saturated air and normal-pressure steam, and the outer wall of the crystal rotating bin is coated with a heat-insulating jacket and a temperature measuring instrument;
the side wall of the dewatering bin is provided with a second air inlet pipe, the second air inlet pipe is connected with high-temperature dry air, the top of the dewatering bin is provided with a second stirring motor, and the second stirring motor is in transmission connection with a stirring system in the dewatering bin.
In a preferred scheme, the two feeding pipes are provided with pneumatic conveying mechanisms.
In the preferred scheme, a fixed plate is arranged at a position close to the top in the mixing tank, a partition plate with a Y-shaped section is arranged in the mixing tank above the fixed plate, the partition plate divides the inner space of the mixing tank above the fixed plate into three compartments with the same size, and the top surfaces of the mixing tanks at the tops of the three compartments are respectively provided with a feeding pipe;
the fixed plate is provided with a first blanking hole, the movable plate is arranged below the fixed plate, and the movable plate is provided with a second blanking hole.
In the preferred scheme, the first blanking holes are round holes, and a plurality of first blanking holes are uniformly distributed in a single compartment;
the second blanking hole is a fan-shaped hole, and the area of the second blanking hole is smaller than the horizontal section area of the single compartment.
In a preferable scheme, a first shaft hole for the rotating shaft to pass through is arranged at the center of the partition plate.
In the preferred scheme, the blending tank of fly leaf below in be equipped with the commentaries on classics board, the commentaries on classics board is "Y" shaped plate, the fixed setting in the pivot of commentaries on classics board, the fixed distributing plate that is equipped with in the blending tank of commentaries on classics board below, the equipartition is equipped with a plurality of third unloading holes on the distributing plate, the setting of distributing plate centre of a circle position is passed in the pivot, stirring vane sets up in the pivot of distributing plate below.
In a preferable scheme, the output ends of the two feeding pipes are connected to the cyclone separator.
In the preferred scheme, the top of the dewatering bin is provided with an exhaust pipe.
The utility model provides an utilize system of ardealite preparation alpha-beta composite gypsum has following beneficial effect through adopting above-mentioned structure:
(1) by carrying out staggered feeding and mixing on the phosphogypsum, the crystal transformation agent and the crystal seeds, the efficiency of preliminary material mixing can be effectively improved, the purpose of full mixing is achieved, and the efficiency of subsequent crystal transformation operation is improved;
(2) high-pressure dehydration or solution dehydration is not needed, and the energy consumption in the production process is reduced.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an explosion diagram of the internal structure of the mixing tank of the present invention.
In the figure: the device comprises a mixing tank 1, a crystal rotating bin 2, a dewatering bin 3, a feeding pipe 4, a feeding pipe 5, a partition plate 6, a first shaft hole 601, a fixing plate 7, a first blanking hole 701, a movable plate 8, a second blanking hole 801, a rotating plate 9, a second shaft hole 901, a distributing plate 10, a third blanking hole 1001, a first stirring motor 11, a rotating shaft 12, a stirring blade 13, a cyclone separator 14, a first air inlet pipe 15, a heat-insulating jacket 16, a temperature measuring instrument 17, a second air inlet pipe 18, an exhaust pipe 19, a second stirring motor 20 and a discharge pipe 21.
Detailed Description
As shown in fig. 1-2, a system for preparing alpha-beta composite gypsum by using phosphogypsum comprises a mixing tank 1, a crystal rotating bin 2 and a dewatering bin 3, wherein a feeding pipe 5 is arranged at the top of the mixing tank 1, the bottom of the mixing tank 1 is connected with the top of the crystal rotating bin 2 through a feeding pipe 4, the bottom of the crystal rotating bin 2 is connected with the top of the dewatering bin 3 through a feeding pipe 4, and a discharging pipe 21 is arranged at the bottom of the dewatering bin 3;
the top of the mixing tank 1 is provided with a first stirring motor 11, the motor shaft of the first stirring motor 11 extends downwards into the mixing tank 1 and is connected with a rotating shaft 12 vertically arranged in the mixing tank 1 through a shaft, and the rotating shaft 12 is provided with stirring blades 13;
the bottom of the crystal rotating bin 2 is provided with two first air inlet pipes 15, the two first air inlet pipes 15 are respectively connected with sub-saturated air and normal-pressure steam, and the outer wall of the crystal rotating bin 2 is coated with a heat-insulating jacket 16 and a temperature measuring instrument 17;
and a second air inlet pipe 18 is arranged on the side wall of the dewatering bin 3, the second air inlet pipe 18 is connected with high-temperature dry air, a second stirring motor 20 is arranged at the top of the dewatering bin 3, and the second stirring motor 20 is in transmission connection with a stirring system in the dewatering bin 3.
In the preferred scheme, the two feeding pipes 4 are respectively provided with a pneumatic conveying mechanism.
In the preferred scheme, a fixing plate 7 is arranged at a position close to the top in the mixing tank 1, a partition plate 6 with a Y-shaped section is arranged in the mixing tank 1 above the fixing plate 7, the partition plate 6 divides the inner space of the mixing tank 1 above the fixing plate 7 into three compartments with the same size, and a feeding pipe 5 is respectively arranged on the top surfaces of the mixing tank 1 at the tops of the three compartments;
the fixed plate 7 is provided with a first blanking hole 701, the movable plate 8 is arranged below the fixed plate 7, and the movable plate 8 is provided with a second blanking hole 801.
In a preferred scheme, the first blanking holes 701 are round holes, and a plurality of first blanking holes 701 are uniformly distributed in a single compartment;
the second blanking hole 801 is a fan-shaped hole, and the area of the second blanking hole 801 is smaller than the horizontal cross-sectional area of a single compartment.
In a preferred embodiment, a first shaft hole 601 through which the rotating shaft 12 passes is disposed at a central position of the partition plate 6.
In the preferred scheme, blending tank 1 below movable plate 8 in be equipped with commentaries on classics board 9, commentaries on classics board 9 is "Y" shaped plate, commentaries on classics board 9 is fixed to be set up on pivot 12, 1 internal fixation of blending tank below commentaries on classics board 9 is equipped with cloth plate 10, the equipartition is equipped with a plurality of third unloading holes 1001 on the cloth plate 10, pivot 12 passes cloth plate 10 centre of a circle position and sets up, stirring vane 13 sets up on pivot 12 below cloth plate 10.
In a preferred scheme, the output ends of the two feeding pipes 4 are connected to the cyclone separator 14.
In a preferable scheme, an exhaust pipe 19 is arranged at the top of the dewatering bin 3.
The principle of the device is as follows:
as shown in fig. 1, the phosphogypsum, the crystal-transforming agent and the crystal seeds are respectively put into three compartments through three feeding pipes 3, then a first stirring motor 11 is started, a movable plate 8 starts to rotate under the action of the first stirring motor 11, when a second blanking hole 801 at the bottom of the movable plate 8 is aligned with a first blanking hole 701 on a fixed plate 7 at the bottom of one compartment, the raw materials in the compartment fall onto a distributing plate 10 and are displaced under the action of a rotating plate 9 and partially fall to the bottom of a mixing tank 1, then the raw materials in the other compartment fall onto the distributing plate 10 in the above process, are preliminarily mixed with other raw materials which do not fall and then fall to the bottom of the mixing tank 1, finally, the three raw materials are fully mixed at the bottom of the mixing tank 1, the mixed raw materials are conveyed to a crystal-transforming bin 2 through a feeding pipe 4, a first air inlet pipe 15 is introduced with sub-saturated air for preheating, when the preheating temperature reaches 60 ℃, normal pressure steam is introduced through the other first air inlet pipe 15, and the humidity in the crystal rotating bin 2 is kept and stabilized for a period of time, so that the purpose of converting alpha-gypsum is realized;
after part of the phosphogypsum is converted into alpha-gypsum, the mixture is conveyed into a dehydration bin 3 through a conveying pipe 4, and high-temperature dry air is fed into the dehydration bin 3 through a second air inlet pipe 18 for drying, so that the purpose of converting the beta-gypsum of the residual phosphogypsum is realized.
Claims (8)
1. A system for preparing alpha-beta composite gypsum by using phosphogypsum is characterized in that: the device comprises a mixing tank (1), a crystal rotating bin (2) and a dewatering bin (3), wherein a feeding pipe (5) is arranged at the top of the mixing tank (1), the bottom of the mixing tank (1) is connected with the top of the crystal rotating bin (2) through a feeding pipe (4), the bottom of the crystal rotating bin (2) is connected with the top of the dewatering bin (3) through the feeding pipe (4), and a discharging pipe (21) is arranged at the bottom of the dewatering bin (3);
a first stirring motor (11) is arranged at the top of the mixing tank (1), the motor shaft of the first stirring motor (11) extends downwards into the mixing tank (1) and is connected with a rotating shaft (12) vertically arranged in the mixing tank (1) through a shaft, and stirring blades (13) are arranged on the rotating shaft (12);
the bottom of the crystal rotating bin (2) is provided with two first air inlet pipes (15), the two first air inlet pipes (15) are respectively connected with sub-saturated air and normal-pressure steam, and the outer wall of the crystal rotating bin (2) is coated with a heat-insulating jacket (16) and a temperature measuring instrument (17);
the side wall of the dewatering bin (3) is provided with a second air inlet pipe (18), the second air inlet pipe (18) is connected with high-temperature dry air, the top of the dewatering bin (3) is provided with a second stirring motor (20), and the second stirring motor (20) is in transmission connection with a stirring system in the dewatering bin (3).
2. The system for preparing alpha-beta composite gypsum by using phosphogypsum according to claim 1, is characterized in that: and pneumatic conveying mechanisms are arranged on the two feeding pipes (4).
3. The system for preparing alpha-beta composite gypsum by using phosphogypsum according to claim 1, is characterized in that: a fixing plate (7) is arranged in the mixing tank (1) at a position close to the top, a partition plate (6) with a Y-shaped section is arranged in the mixing tank (1) above the fixing plate (7), the partition plate (6) divides the inner space of the mixing tank (1) above the fixing plate (7) into three compartments with the same size, and the top surfaces of the mixing tank (1) at the tops of the three compartments are respectively provided with a feeding pipe (5);
the device is characterized in that a first blanking hole (701) is formed in the fixed plate (7), a movable plate (8) is arranged below the fixed plate (7), and a second blanking hole (801) is formed in the movable plate (8).
4. The system for preparing alpha-beta composite gypsum by using phosphogypsum according to claim 3, is characterized in that: the first blanking holes (701) are round holes, and a plurality of first blanking holes (701) are uniformly distributed in a single compartment;
the second blanking hole (801) is a fan-shaped hole, and the area of the second blanking hole (801) is smaller than the horizontal cross-sectional area of a single compartment.
5. The system for preparing alpha-beta composite gypsum by using phosphogypsum according to claim 3, is characterized in that: the center of the clapboard (6) is provided with a first shaft hole (601) for the rotating shaft (12) to pass through.
6. The system for preparing alpha-beta composite gypsum by using phosphogypsum according to claim 3, is characterized in that: the mixing tank (1) of fly leaf (8) below in be equipped with commentaries on classics board (9), commentaries on classics board (9) are "Y" shaped plate, change board (9) fixed setting on pivot (12), mixing tank (1) internal fixation of commentaries on classics board (9) below is equipped with distributing plate (10), the equipartition is equipped with a plurality of third unloading holes (1001) on distributing plate (10), pivot (12) pass distributing plate (10) centre of a circle position and set up, stirring vane (13) set up on pivot (12) of distributing plate (10) below.
7. The system for preparing alpha-beta composite gypsum by using phosphogypsum according to claim 1, is characterized in that: the output ends of the two feeding pipes (4) are connected to the cyclone separator (14).
8. The system for preparing alpha-beta composite gypsum by using phosphogypsum according to claim 1, is characterized in that: and an exhaust pipe (19) is arranged at the top of the dewatering bin (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022703517.0U CN213924534U (en) | 2020-11-20 | 2020-11-20 | System for utilize ardealite preparation alpha-beta composite gypsum |
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| CN202022703517.0U CN213924534U (en) | 2020-11-20 | 2020-11-20 | System for utilize ardealite preparation alpha-beta composite gypsum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880471A (en) * | 2021-11-12 | 2022-01-04 | 天宝动物营养科技股份有限公司 | Preparation method of alpha-beta composite semi-hydrated gypsum |
| CN115611537A (en) * | 2022-11-01 | 2023-01-17 | 湖北聚海环境科技有限公司 | Phosphogypsum purification treatment device and high-strength phosphogypsum preparation device and method |
-
2020
- 2020-11-20 CN CN202022703517.0U patent/CN213924534U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880471A (en) * | 2021-11-12 | 2022-01-04 | 天宝动物营养科技股份有限公司 | Preparation method of alpha-beta composite semi-hydrated gypsum |
| CN115611537A (en) * | 2022-11-01 | 2023-01-17 | 湖北聚海环境科技有限公司 | Phosphogypsum purification treatment device and high-strength phosphogypsum preparation device and method |
| CN115611537B (en) * | 2022-11-01 | 2023-07-25 | 湖北聚海环境科技有限公司 | Phosphogypsum purifying treatment device and high-strength phosphogypsum preparation device and method |
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