A solid waste treatment device for the recycling of phosphogypsum solid waste resources

Abstract

This application provides a solid waste treatment device for the recycling of phosphogypsum solid waste resources, relating to the field of solid waste treatment technology. The device includes a combustion assembly, a tank assembly, and a crushing assembly. The tank assembly is housed inside the combustion assembly, and a first motor is also housed inside the combustion assembly. The crushing assembly is located at the output end of the first motor. The crushing assembly includes a rotating base, and a second motor is housed inside the rotating base. A drive shaft is provided at the output end of the second motor. This application integrates material transfer and pre-oxygenation functions. The blower serves as both the air source for fluidized material conveying and the pre-oxygenation device for oxidation and firing. The centrifugal disc acts as both a transfer station for material transfer and a distributor to evenly distribute the material into the combustion space. Fluidized conveying ensures thorough material transfer without residue, while centrifugal feeding ensures uniform material distribution within the combustion space, allowing for full contact with the pre-charged oxygen, significantly improving the firing reaction rate and the uniformity of clinker quality.

Description

Technical Field

[0001] This application relates to the field of solid waste treatment technology, specifically to a solid waste treatment device for the recycling of phosphogypsum solid waste resources. Background Technology

[0002] Phosphogypsum is a solid waste generated during the wet-process phosphoric acid production. Approximately 4-5 tons of phosphogypsum are produced for every ton of phosphoric acid produced. Currently, the annual discharge of phosphogypsum is enormous, with accumulated stockpiles exceeding hundreds of millions of tons. However, the comprehensive utilization rate remains low. Large quantities of phosphogypsum are disposed of through open-air stockpiling, which not only occupies significant land resources but also allows soluble phosphorus, fluorine, and heavy metals to leach out with rainwater, causing serious pollution to surrounding water bodies, soil, and the ecological environment. Therefore, developing efficient, economical, and resource-efficient phosphogypsum solid waste treatment technologies is of significant practical importance.

[0003] The main component of phosphogypsum is calcium sulfate dihydrate, and it also contains small amounts of impurities such as phosphorus, fluorine, silicon, aluminum, and iron. The existing resource utilization pathways of phosphogypsum mainly include: direct use as a cement retarder, production of gypsum building materials, and preparation of cement co-produced with sulfuric acid. Among these, the oxidation calcination process is an important direction for the high-value utilization of phosphogypsum. This process involves reacting phosphogypsum with a reducing agent (such as coke) at high temperature to decompose it into sulfur dioxide and calcium oxide. Sulfur dioxide can be used to produce sulfuric acid, and calcium oxide can then react with other components to produce cement clinker. This process can simultaneously recover sulfur resources and produce building material raw materials, realizing the full utilization of phosphogypsum components.

[0004] However, existing phosphogypsum reduction decomposition-oxidation calcination treatment devices still have many technical shortcomings: First, the material mixing and reaction processes are separated. In traditional processes, the mixing of phosphogypsum and reducing agents is usually pretreated using separate stirring or ball milling equipment, resulting in limited mixing uniformity. Furthermore, the mixed material needs to be transferred to a rotary kiln or fluidized bed reactor for thermal decomposition. Dust and component segregation are easily generated during the material transfer process, leading to insufficient contact area for the solid-phase reaction and low reaction rate and conversion rate. Secondly, controlling the reaction temperature is difficult, and side reactions are serious. To promote the decomposition of calcium sulfate, existing rotary kilns or fluidized bed devices usually need to raise the temperature to above 1200℃. At this high temperature, phosphogypsum is very prone to over-reduction reaction, generating byproducts such as calcium sulfide. This not only significantly reduces the purity of sulfur dioxide recovery, but the presence of calcium sulfide in the residual solids also affects the calcination quality of subsequent cement clinker. At the same time, high-temperature calcination consumes a lot of energy and results in a large amount of heat loss. Third, the heat utilization efficiency is low. In existing split-type devices, the reduction decomposition process and the oxidation calcination process are carried out in separate equipment. The high-temperature residue after decomposition dissipates a lot of heat during the transfer process and needs to be reheated after entering the calcination equipment. However, the high-temperature flue gas discharged from the calcination equipment is often directly used for power generation in waste heat boilers or directly discharged. Its heat energy grade fails to effectively match the heat demand (600-800℃) of the upstream decomposition process, resulting in serious energy waste.

[0005] Therefore, developing an integrated solid waste treatment device that can achieve efficient mixing, precise temperature control, and cascade utilization of thermal energy from phosphogypsum has become an urgent technical problem to be solved in this field. Summary of the Invention

[0006] The purpose of this application is to provide a solid waste treatment device for the recycling of phosphogypsum solid waste resources, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this application provides the following technical solution: A solid waste treatment device for recycling phosphogypsum solid waste includes a combustion assembly, a tank assembly, and a crushing assembly. The tank assembly is housed inside the combustion assembly, and a first motor is also housed inside the combustion assembly. The crushing assembly is located at the output end of the first motor. The crushing assembly includes a rotating base, and a second motor is housed inside the rotating base. A drive shaft is located at the output end of the second motor. A partition plate is sleeved on the outer end of the drive shaft. The end of the drive shaft is connected to the crushing base, and a feed plate is sleeved on the end of the crushing base. An electrically controlled push rod is housed inside the feed plate, and a baffle is located at the output end of the electrically controlled push rod. A feed inlet is opened near the crushing base on the feed plate, and a connecting outlet is opened at the end of the feed plate away from the feed inlet. A centrifugal disc is installed at the outer end of the feed plate, and a discharge outlet is opened at the outer end of the centrifugal disc.

[0008] Furthermore, the combustion assembly includes a combustion seat, burners are mounted at both ends of the combustion seat, a discharge pipe is provided at the bottom outer end of the combustion seat, a regenerating seat is mounted at the outer end of the combustion seat, a first suction pump is mounted at the top outer end of the combustion seat, and a regenerating pipe is connected to the outer end of the first suction pump. The regenerating seat has a regenerating chamber and a collecting chamber inside, a first collecting pipe is provided at the left outer end of the regenerating seat, and a second collecting pipe is provided at the right outer end of the regenerating seat.

[0009] Furthermore, the combustion seat is connected to the regenerator pipe via a first suction pump, and the regenerator pipe is connected to the first collection pipe via a regenerator chamber.

[0010] Furthermore, the collection chamber is connected to the second collection tube, and the combustion seat and the regenerator seat are an integrated structure.

[0011] Furthermore, the first motor drives the rotating seat to rotate, and the rotating seat, the partition plate, and the feed tray are concentrically distributed.

[0012] Furthermore, the second motor drives the compaction seat to rotate via a transmission shaft, and the centrifugal disc is located inside the combustion seat.

[0013] Furthermore, the tank assembly includes a crushing tank, a feeding seat is provided at the top outer end of the crushing tank, and a feeding port is provided at the top outer end of the feeding seat. A blower is provided at the outer end of the feeding seat, and a connecting pipe is connected between the feeding seat and the regenerating seat, and a second suction pump is provided in the middle section of the connecting pipe.

[0014] Furthermore, the outer contour dimensions of the grinding tank match the inner contour dimensions of the regenerating seat, and the inner surface of the grinding tank fits into the outer surface of the grinding seat.

[0015] Furthermore, the feed seat is connected to the crushing tank, and the feed seat is connected to the collection chamber through a connecting pipe.

[0016] Furthermore, the blower is connected to the crushing tank via the feed seat, and the feed inlet is connected to the crushing tank via the feed seat.

[0017] Beneficial effects: 1. This application integrates the compaction and mixing mechanism with the reaction chamber. Relying on the combined motion of the compaction components' revolution and rotation, and utilizing the squeezing, shearing, and grinding action between the compaction seat and the inner wall of the compaction tank, the crushing, refining, and thorough mixing of phosphogypsum and coke reducing agent are completed simultaneously. This significantly increases the contact area of ​​solid materials, fundamentally solving the problems of dust leakage and component segregation caused by material transfer in traditional equipment. The compaction tank is equipped with an independent regenerating chamber, which uses the high-temperature flue gas waste heat from the calcination process to precisely control the temperature, keeping the reaction temperature inside the tank stably within the semi-reduction range of 600~800℃. This eliminates the need for the high-temperature calcination mode above 1200℃ in traditional equipment, effectively inhibiting the over-reduction reaction of phosphogypsum and avoiding the generation of harmful byproducts such as calcium sulfide. This not only improves the purity of sulfur dioxide gas collection but also ensures the calcination quality of subsequent cement clinker.

[0018] 2. This application abandons traditional conveying methods such as screw conveyors and gravity chutes, which are prone to clogging and have large residues. Instead, it adopts a blower-driven airflow fluidization and a rotating feed port structure to fluidize the powder material in the compaction tank. Combined with the rotating feed port's all-area material intake, it achieves all-round, dead-angle-free, and highly efficient material transfer, completely solving the industry pain points of bridging, clogging, and residue in phosphogypsum fine powder. The air supplied by the blower is pre-oxygenated simultaneously during the material fluidization process. The oxygen enters the combustion chamber along with the material, allowing the material particles to come into uniform contact with the oxidant in advance. Then, the material is evenly distributed in the combustion space by high-speed centrifugal throwing through the centrifugal disc, avoiding localized reducing atmospheres. This allows for a more complete and faster reaction rate in the 1200~1450℃ high-temperature oxidation and calcination reaction, resulting in cement clinker with uniform composition and stable performance. The fluidization conveying air source also serves as the pre-oxygen source for oxidation and calcination. These two functions are integrated into one air circuit, which not only solves the problem of powder clogging but also improves the calcination atmosphere.

[0019] 3. This application adopts an integrated structure of combustion seat and regenerator seat to build a multi-stage closed-loop system for the utilization of thermal energy: the flue gas generated at 1200~1450℃ during high-temperature calcination is first introduced into the regenerator chamber to heat the outer wall of the crushing tank, precisely matching the heat demand of the 600~800℃ semi-reduction process at the front end. After heat exchange and cooling, it is then discharged to the outside. The waste heat of the high-temperature flue gas is reused, eliminating the need for a separate heating source for the reduction process, significantly reducing the overall calcination energy consumption, and solving the serious energy waste problem caused by direct heat dissipation of high-temperature residue and flue gas in traditional separate equipment. The regenerator seat is equipped with independent regenerator chambers and collection chambers, with the two gas paths completely separated and not interfering with each other: the regenerator chamber is responsible for the recovery and heat exchange of waste heat from the flue gas, while the collection chamber is specifically used to extract and collect sulfur dioxide gas generated by the reduction reaction. While realizing the recycling of thermal energy, it also ensures the high-purity recovery of sulfur resources, truly realizing the recovery of sulfur resources from phosphogypsum and the full-component resource utilization of building material clinker preparation.

[0020] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0022] Figure 1 Figure A shows the overall three-dimensional structure of a solid waste treatment device for recycling phosphogypsum solid waste in an embodiment of this application. Figure 2 Figure B shows the overall three-dimensional structure of a solid waste treatment device for recycling phosphogypsum solid waste in an embodiment of this application. Figure 3 This is a schematic diagram of the tank assembly in an embodiment of this application; Figure 4 This is a schematic diagram of the internal structure of the tank assembly in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the crushing component in the embodiments of this application; Figure 6 This is a schematic diagram of the internal structure of the combustion chamber in an embodiment of this application; Figure 7 This is a schematic cross-sectional view of the solid waste treatment device for recycling phosphogypsum solid waste in an embodiment of this application. Figure 8 This is a schematic diagram of the structure of the feed tray in an embodiment of this application; Figure 9 This is a cross-sectional view of the regenerative seat in an embodiment of this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Combustion assembly; 101. Combustion seat; 102. Burner; 103. Discharge pipe; 104. Regenerating seat; 105. First suction pump; 106. Regenerating pipe; 107. Regenerating chamber; 108. First collection pipe; 109. Collection chamber; 110. Second collection pipe; 2. Tank assembly; 201. Compressing tank; 202. Feed seat; 203. Feed inlet; 204. Blower; 205. Connecting pipe; 206. Second suction pump; 3. First motor; 4. Compressing assembly; 401. Rotating seat; 402. Second motor; 403. Drive shaft; 404. Divider plate; 405. Compressing seat; 406. Feeding disc; 407. Electrically controlled push rod; 408. Baffle; 409. Feeding port; 410. Through port; 411. Centrifugal disc; 412. Discharge port. Detailed Implementation

[0024] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0026] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] Please see Figures 1 to 9 This application provides a solid waste treatment device for recycling phosphogypsum solid waste resources, including a combustion assembly 1, a tank assembly 2, and a crushing assembly 4. The tank assembly 2 is installed inside the combustion assembly 1. The tank assembly 2 includes a crushing tank 201. A feed seat 202 is installed at the top outer end of the crushing tank 201, and a feed inlet 203 is opened at the top outer end of the feed seat 202. A blower 204 is installed at the outer end of the feed seat 202. A connecting pipe 205 connects the feed seat 202 and the regenerating seat 104. A second suction pump 206 is installed in the middle section of the connecting pipe 205. A first motor 3 is installed inside the combustion assembly 1, and the crushing assembly 4 is installed at the output end of the first motor 3.

[0029] Specifically, the compaction assembly 4 includes a rotating seat 401, a second motor 402 is installed inside the rotating seat 401, and a drive shaft 403 is provided at the output end of the second motor 402. A partition plate 404 is sleeved on the outer end of the drive shaft 403. The end of the drive shaft 403 is connected to a compaction seat 405, and a feed plate 406 is sleeved on the end of the compaction seat 405. An electrically controlled push rod 407 is installed inside the feed plate 406, and a baffle 408 is installed at the output end of the electrically controlled push rod 407. A feed inlet 409 is opened on the feed plate 406 near the compaction seat 405, and a through-hole 410 is opened on the end of the feed plate 406 away from the feed inlet 409. A centrifugal disc 411 is installed on the outer end of the feed plate 406, and a discharge port 412 is opened on the outer end of the centrifugal disc 411. The first motor 3 drives the rotating seat 401 to rotate.

[0030] In some specific embodiments, the rotating seat 401, the partition plate 404, and the feed tray 406 are concentrically distributed.

[0031] Understandably, the second motor 402 drives the grinding seat 405 to rotate via the transmission shaft 403. The centrifugal disc 411 is located inside the combustion seat 101. The outer contour dimensions of the grinding tank 201 match the inner contour dimensions of the regenerating seat 104. The inner surface of the grinding tank 201 is in contact with the outer surface of the grinding seat 405. The feed seat 202 is connected to the grinding tank 201 and is connected to the collection chamber 109 via the connecting pipe 205. The blower 204 is connected to the grinding tank 201 via the feed seat 202 and the feed inlet 203 is connected to the grinding tank 201 via the feed seat 202.

[0032] The specific operation is as follows: the operator feeds phosphogypsum and reducing agent coke into the feed inlet 203 in proportion. The feed inlet 203 is set at the top of the feed seat 202, which is connected to the crushing tank 201. The material falls into the crushing tank 201 through this feed inlet. The crushing tank 201 is placed inside the regenerating seat 104 to provide conditions for subsequent heating. The first motor 3 starts and drives the rotating seat 401 to revolve. The second motor 402 drives the crushing seat 405 to rotate on its own axis through the transmission shaft 403. Through this design, the rotating seat 401 drives the crushing seat 405 to make a circular motion inside the crushing tank 201, realizing the covering crushing of the material at the bottom of the entire tank, ensuring that all materials are crushed. While the crushing seat 405 revolves around the feed in the feed, it also rotates at high speed. Its outer surface is in contact with the inner surface of the crushing tank 201. Under the strong squeezing, shearing and grinding action on the material sandwiched in the middle, the phosphogypsum and coke are crushed into fine particles. As the rotating seat 401 rotates, the partition plate 404 can divide the internal space of the grinding tank 201 into a parts area and a working area. This can prevent fine phosphogypsum and coke from entering the parts area and affecting the normal operation of the equipment. Through the combined motion of the revolution and rotation of the grinding seat 405, the phosphogypsum and coke can be fully mixed, which can greatly increase the solid-phase reaction contact area. In the previous combustion process, the high-temperature exhaust gas and residual heat generated by the burner 102 have been transported by the first suction pump 105 to the regenerating chamber 107 inside the regenerating seat 104 via the regenerating pipe 106. The hot gas in the regenerating chamber 107 continuously heats the outer wall of the crushing tank 201, maintaining the temperature inside the tank at 600 to 800°C. At this temperature, phosphogypsum and coke undergo a reduction reaction, and the phosphogypsum is partially reduced, releasing high-concentration sulfur dioxide gas. This effectively avoids over-reduction and the formation of calcium sulfide. At this time, the second suction pump 206 operates, and the sulfur dioxide gas is drawn into the collecting chamber 109 through the connecting pipe 205, and then collected by the second collecting pipe 110, realizing the high-purity recovery of sulfur resources.

[0033] Furthermore, in the embodiments of this application, such as Figure 1 , 2As shown in Figures 9 and 1, the combustion assembly 1 includes a combustion seat 101. Burners 102 are installed at both ends of the combustion seat 101. A discharge pipe 103 is provided at the bottom outer end of the combustion seat 101. A regenerating seat 104 is installed at the outer end of the combustion seat 101. A first suction pump 105 is installed at the top outer end of the combustion seat 101. A regenerating pipe 106 is connected to the outer end of the first suction pump 105. A regenerating chamber 107 and a collecting chamber 109 are provided inside the regenerating seat 104. A first collecting pipe 108 is provided at the left outer end of the regenerating seat 104. A second collecting pipe 110 is provided at the right outer end of the regenerating seat 104. The combustion seat 101 is connected to the regenerating pipe 106 through the first suction pump 105. The regenerating pipe 106 is connected to the first collecting pipe 108 through the regenerating chamber 107. The collecting chamber 109 is connected to the second collecting pipe 110. The combustion seat 101 and the regenerating seat 104 are an integrated structure.

[0034] After the sulfur dioxide gas collection is completed, the remaining solid material in the reactor needs to be transferred to the combustion seat 101 for the next step of calcination. At this time, the electric control push rod 407 operates, driving the baffle 408 to move, so that the feed port 409 inside the feed tray 406 connects with the connecting port 410. At the same time, the blower 204 also starts to work, and the blower 204 sends a high-speed airflow into the crushing tank 201 through the feed seat 202. Due to the poor flowability of the powdered material, the feed tray 406 moves with the rotating seat 401. 1. The rotation continues, causing the feed inlet 409 to circulate at different heights within the grinding tank 201. The airflow blown in by the blower 204 lifts the powder, fluidizing it, and the powder enters the centrifugal disc 411 through the open feed inlet 409 and the through-hole 410. The coordination between the rotating feed inlet 409 and the airflow enables efficient, all-around transfer of the powder without dead angles. Furthermore, because the air blown in by the blower 204 contains a large amount of oxygen, this oxygen enters the combustion chamber 101 along with the powder. This provides sufficient oxidant for the subsequent oxidation and calcination reaction. The powder entering the centrifugal disc 411 is evenly thrown out from the discharge port 412 under the action of centrifugal force, driven by the high-speed rotation of the first motor 3, and dispersed into the combustion seat 101. The burner 102 is ignited, and the solid material is heated to 1200 to 1450°C in the oxidizing atmosphere. Since the blower 204 has been pre-charged with oxygen, the combustion is more complete. Under the action of combustion, calcium oxide, silicon dioxide, and carbon dioxide in the solid material are oxidized. Aluminum and ferric oxide undergo solid solution evolution to generate cement clinker minerals. The clinker particles after firing can be discharged through the discharge pipe 103. The high-temperature exhaust gas and hot flue gas generated by the burner 102 are extracted by the first suction pump 105 and transported to the regenerating chamber 107 through the regenerating pipe 106 to heat the crushing tank 201, providing heat for the semi-reduction reaction of the next batch of materials, realizing cascade heat utilization. The exhaust gas after heat exchange is collected through the first collection pipe 108 and then centrally processed.

[0035] In summary, when using this solid waste treatment device for recycling phosphogypsum solid waste resources, the operator first feeds phosphogypsum and reducing agent coke into the feed inlet 203 in proportion. The feed inlet 203 is located at the top of the feed seat 202, which is connected to the crushing tank 201. The material falls into the crushing tank 201 through this feed inlet, and the entire crushing tank 201 is placed inside the regenerating seat 104. Then, the first motor 3 and the second motor 402 are started. The first motor 3 drives the rotating seat 401 to revolve, and the second motor 402 drives the crushing seat 405 to rotate via the transmission shaft 403. The rotating seat 401 drives the crushing seat 405 to make circular motion inside the crushing tank 201, realizing the covering crushing of the material at the bottom of the entire tank, ensuring that all materials are crushed. The crushing seat 405 rotates at high speed while revolving, and its outer surface is in contact with the inner surface of the crushing tank 201. Under the strong squeezing, shearing and grinding action on the material sandwiched in the middle, the phosphogypsum and coke are crushed into fine particles. The outer end of the transmission shaft 403 is fitted with a partition plate 404, which rotates with the rotating seat 401. The partition plate 404 can divide the internal space of the crushing tank 201 into a parts area and a working area, which can prevent fine phosphogypsum and coke from entering the parts area and affecting the normal operation of the equipment. Through the combined motion of the revolution and rotation of the compaction seat 405, phosphogypsum and coke are fully mixed, increasing the contact area for solid-phase reaction. The high-temperature exhaust gas and residual heat generated by the burner 102 are transported by the first suction pump 105 to the regeneration chamber 107 inside the regeneration seat 104 via the regeneration pipe 106. The hot gas in the regeneration chamber 107 continuously heats the outer wall of the compaction tank 201, maintaining the temperature inside the tank at 600 to 800°C. At this temperature, phosphogypsum and coke undergo a reduction reaction. Due to precise temperature control and uniform material mixing, phosphogypsum is partially reduced, releasing high-concentration sulfur dioxide gas, which effectively avoids over-reduction and the formation of calcium sulfide. At this time, the second suction pump 206 operates, and the sulfur dioxide gas is drawn into the collection chamber 109 through the connecting pipe 205, and then collected by the second collection pipe 110, realizing high-purity recovery of sulfur resources. Next, after the sulfur dioxide gas collection is complete, the remaining solid material in the reactor needs to be transferred to the combustion seat 101 for the next step of calcination. At this time, the electric control push rod 407 operates, driving the baffle 408 to move, so that the feed port 409 inside the feed plate 406 connects with the connecting port 410. At the same time, the blower 204 also starts to work, and the blower 204 sends a high-speed airflow into the crushing tank 201 through the feed seat 202. Due to the poor flowability of the powdered material, by keeping the feed plate 406 rotating with the rotating seat 401, the feed port 409 will appear cyclically at different height positions inside the crushing tank 201. The blower 204 blows... The incoming airflow blows the powder up, making it fluidized, and then it enters the centrifugal disc 411 through the open feed port 409 and the through port 410. The rotation of the feed port 409 and the airflow can achieve efficient transfer of the powder in all directions without dead angles. In addition, since the air blown in by the blower 204 contains a large amount of oxygen, this oxygen enters the combustion seat 101 along with the powder, providing sufficient oxidant for the subsequent oxidation and calcination reaction. The powder entering the centrifugal disc 411 will be evenly thrown out from the discharge port 412 under the action of centrifugal force as the first motor 3 drives the high-speed rotation, and dispersed into the interior of the combustion seat 101. Finally, the burner 102 is ignited, and the solid material will be heated to 1200 to 1450°C in an oxidizing atmosphere. Since the blower 204 has been pre-charged with oxygen, the combustion will be more complete. Under the action of combustion, the calcium oxide, silicon dioxide, aluminum oxide and ferric oxide in the solid material will undergo solid solution component evolution to generate cement clinker minerals. The clinker particles after calcination can be discharged through the discharge pipe 103. The high-temperature exhaust gas and hot flue gas generated by the burner 102 are extracted by the first suction pump 105 and transported to the regenerating chamber 107 through the regenerating pipe 106 to heat the crushing tank 201, providing heat for the semi-reduction reaction of the next batch of materials, realizing cascade heat utilization. The exhaust gas after heat exchange is collected through the first collection pipe 108 and will be centrally processed in the future.

[0036] This document uses specific examples to illustrate the principles and implementation methods of this application. The examples are merely for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, and the existence of an infinite number of specific structures, those skilled in the art can make various improvements, modifications, or variations without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A solid waste treatment device for the recycling of phosphogypsum solid waste resources, characterized in that, The device includes a combustion assembly (1), a tank assembly (2), and a crushing assembly (4). The tank assembly (2) is housed inside the combustion assembly (1), and a first motor (3) is housed inside the combustion assembly (1). The crushing assembly (4) is located at the output end of the first motor (3). The crushing assembly (4) includes a rotating base (401), and a second motor (402) is housed inside the rotating base (401). A drive shaft (403) is provided at the output end of the second motor (402). A partition plate (404) is sleeved on the outer end of the drive shaft (403). The end is connected to a rolling base (405), and the end of the rolling base (405) is fitted with a feed plate (406). The feed plate (406) is equipped with an electric control push rod (407) inside, and a baffle (408) is installed at the output end of the electric control push rod (407). The feed plate (406) has a feed inlet (409) near the rolling base (405), and a through port (410) is opened at the end of the feed plate (406) away from the feed inlet (409). A centrifugal disc (411) is installed at the outer end of the feed plate (406), and a discharge port (412) is opened at the outer end of the centrifugal disc (411).

2. The solid waste treatment device for recycling phosphogypsum solid waste according to claim 1, characterized in that, The combustion assembly (1) includes a combustion seat (101), burners (102) are installed at both ends of the combustion seat (101), and a discharge pipe (103) is provided at the bottom outer end of the combustion seat (101). A regenerating seat (104) is installed at the outer end of the combustion seat (101), and a first suction pump (105) is installed at the top outer end of the combustion seat (101). A regenerating pipe (106) is connected to the outer end of the first suction pump (105). A regenerating chamber (107) and a collecting chamber (109) are opened inside the regenerating seat (104). A first collecting pipe (108) is provided at the left outer end of the regenerating seat (104), and a second collecting pipe (110) is provided at the right outer end of the regenerating seat (104).

3. A solid waste treatment device for recycling phosphogypsum solid waste according to claim 2, characterized in that, The combustion seat (101) is connected to the heat recovery pipe (106) via the first suction pump (105), and the heat recovery pipe (106) is connected to the first collection pipe (108) via the heat recovery chamber (107).

4. A solid waste treatment device for recycling phosphogypsum solid waste according to claim 2, characterized in that, The collection chamber (109) is connected to the second collection tube (110), and the combustion seat (101) and the heat recovery seat (104) are an integrated structure.

5. A solid waste treatment device for recycling phosphogypsum solid waste according to claim 1, characterized in that, The first motor (3) drives the rotating seat (401) to rotate, and the rotating seat (401), the partition plate (404), and the feed tray (406) are concentrically distributed.

6. A solid waste treatment device for recycling phosphogypsum solid waste according to claim 1, characterized in that, The second motor (402) drives the rolling seat (405) to rotate via the transmission shaft (403), and the centrifugal disc (411) is located inside the combustion seat (101).

7. A solid waste treatment device for recycling phosphogypsum solid waste according to claim 2, characterized in that, The tank assembly (2) includes a crushing tank (201), a feeding seat (202) is provided at the top outer end of the crushing tank (201), and a feeding port (203) is provided at the top outer end of the feeding seat (202). A blower (204) is provided at the outer end of the feeding seat (202). A connecting pipe (205) is connected between the feeding seat (202) and the regenerating seat (104), and a second suction pump (206) is provided in the middle section of the connecting pipe (205).

8. A solid waste treatment device for recycling phosphogypsum solid waste according to claim 7, characterized in that, The outer contour dimensions of the grinding tank (201) match the inner contour dimensions of the regenerating seat (104), and the inner surface of the grinding tank (201) fits against the outer surface of the grinding seat (405).

9. A solid waste treatment device for recycling phosphogypsum solid waste according to claim 7, characterized in that, The feed seat (202) is connected to the crushing tank (201), and the feed seat (202) is connected to the collection chamber (109) through the connecting pipe (205).

10. A solid waste treatment device for recycling phosphogypsum solid waste according to claim 7, characterized in that, The blower (204) is connected to the crushing tank (201) through the feed seat (202), and the feed inlet (203) is connected to the crushing tank (201) through the feed seat (202).

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