Novel variable-temperature calcining and drying integrated ardealite equipment
By adopting the inner and outer kiln structure and multi-air vent design in the phosphogypsum equipment, the problems of over-dehydration and energy waste caused by high-temperature air drying of phosphogypsum calcining equipment are solved, and the effects of fixed temperature drying and environmentally friendly emissions are achieved, and the stability of the equipment is improved. and finished product quality.
Patent Information
- Application Number
- CN202323125374.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-20
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-11-20
AI Technical Summary
During the high-temperature air drying process, existing phosphogypsum calcining equipment has problems such as over-dehydration of products, high energy costs, high exhaust humidity content and poor environmental protection emission effects.
A integrated phosphogypsum equipment for variable temperature calcination and drying is designed, adopting an inner and outer kiln structure, which can achieve efficient hot air generation through combustion mixer and coal powder gas burner, and ensure air volume through the kiln head secondary air inlet and air duct linkage. Evenly, avoid material clogging and over-dehydration, and use a cyclone dust collector to reduce exhaust pollution.
The temperature-fixed drying effect is achieved, which avoids product over-dehydration and energy waste, reduces environmental pollution, and improves the quality of finished products and the stability of the device.
Smart Images
Figure CN222211240U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of phosphogypsum processing, in particular to a novel temperature-variable calcination and drying integrated phosphogypsum equipment. Background Art
[0002] The common calcination of phosphogypsum adopts a single air kiln drying method, and the most commonly used method is to control the degree of dehydration and the tail gas dew point blockage by lowering the wind temperature. This single air kiln drying has certain disadvantages. The effect that requires high temperature to produce cannot be achieved, and under this equipment layout, adjusting to high-temperature air drying will result in over-dehydration of the product, too high energy costs, and too high moisture content in the tail gas, which is easy to condense and block. The quality of the finished product and the operation of the device are not stable enough, and its environmental emission effect is difficult to meet the standards. Therefore, those skilled in the art provide a new type of variable temperature and high-efficiency calcination phosphogypsum equipment to solve the problems raised in the above background technology. Utility Model Content
[0003] The purpose of the utility model is to provide a novel temperature-variable calcination and drying integrated phosphogypsum equipment to solve the problems raised in the above-mentioned background technology.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A novel variable temperature calcination and drying integrated phosphogypsum equipment comprises a kiln main body, wherein the kiln main body is divided into a two-layer structure of an inner kiln and an outer kiln, the kiln tail side of the inner kiln and the outer kiln are connected to each other, a kiln head feeder is provided on the kiln head side of the outer kiln, and the discharge end of the kiln head feeder extends to the interior of the inner kiln, a kiln head separation box is provided at the kiln head of the kiln main body, a combustion mixer is connected to the kiln head side of the outer kiln, the combustion mixer extends to the interior of the inner kiln, a pulverized coal gas burner is connected to the other side of the combustion mixer, a pulverized coal gas blower is connected to the input end of the pulverized coal gas burner, and the pulverized coal gas blower is connected to a pulverized coal mill.
[0006] As a further solution of the utility model: an exhaust gas emission pipe is connected to the upper side of the kiln head separation box, the exhaust gas emission pipe and the interior of the outer kiln are interconnected, the discharge end of the exhaust gas emission pipe is connected to a cyclone dust collector, the upper discharge port of the cyclone dust collector is connected to an induced draft fan, and a feed sealed conveying scraper is provided at the lower discharge port of the kiln body, and the discharge end of the feed sealed conveying scraper and the feed end of the kiln head feeder are connected to each other.
[0007] As a further solution of the utility model: a kiln head secondary air inlet is arranged on the outer surface of the kiln head side of the outer kiln, the inner end of the kiln head secondary air inlet extends to the interior of the outer kiln and is connected with an air distribution cylinder section, the air distribution cylinder section is annularly sleeved and fixedly arranged on the outer surface of the kiln head side of the inner kiln, a single air distribution tube is equidistantly fixedly connected to the outer surface of the inner kiln, one side of the single air distribution tube is connected to the air distribution cylinder section, the other side of the single air distribution tube extends to the kiln tail side of the inner kiln, and the outer end of the kiln head secondary air inlet is connected with a dust extraction fan.
[0008] As a further solution of the utility model: the inner kiln is close to the kiln head side for high temperature calcination zone, the inner kiln is close to the kiln tail side for drying zone, the discharge end of the kiln head feeder is located in the high temperature calcination zone of the inner kiln, and a one-way valve is arranged on the surface of the kiln head feeder.
[0009] As a further solution of the utility model: the discharging end of the kiln head feeder is arranged in a ram horn shape, and the bending direction is toward the kiln tail side of the kiln main body.
[0010] As a further solution of the utility model: a powder sealing conveying scraper is arranged at the lower end of the discharge port of the kiln head separation box.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] By carrying out calcination and drying separately inside the inner kiln, during calcination, hot air is introduced into the inner kiln at a high rotation state through the combustion mixer, which promotes the full mixing of materials and hot air and timely and high-speed combustion of impurities in the materials. The combustion mixer is directly connected to the pulverized coal gas burner, which has a certain throttling effect and can ensure the full combustion of pulverized coal. By setting a secondary air inlet at the kiln head, after the air is blown by the dust extraction fan, the air introduced is dispersed to the inside of each air distribution single pipe by using the air distribution tube section, so that the air can evenly enter the inside of the outer kiln and the materials inside the inner kiln are fully mixed, thereby avoiding the blockage of the air duct by the material. This creates uneven annular air volume, ensuring sufficient mixing of the material and hot gas, thereby achieving the effect of constant temperature drying of the material, avoiding incomplete drying or over-drying of the product, which may cause over-dehydration of the material. At the same time, through the air distribution of the single air distribution tube, it can avoid material accumulation and re-combination with the water removed from the material to block the kiln, and can also reduce energy waste, with a certain energy-saving effect. When discharging the exhaust gas, the cyclone dust collector can be used to collect a small amount of material contained in the exhaust gas, reducing material waste, and the exhaust gas after dust removal can be discharged again to reduce pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1This is a schematic diagram of the structure of a new type of temperature-variable calcination and drying integrated phosphogypsum equipment.
[0014] In the figure: 10, kiln body; 11, inner kiln; 12, outer kiln; 13, kiln head separation box; 14, kiln head secondary air inlet; 15, kiln head feeder; 16, combustion mixer; 17, pulverized coal gas burner; 18, tail gas discharge pipe; 19, cyclone dust collector; 20, induced draft fan; 21, powder sealed conveying scraper; 22, dust extraction fan; 23, air distribution single pipe; 24, one-way valve; 25, air distribution cylinder section; 26, pulverized coal gas fan; 27, pulverized coal mill; 28, feed sealed conveying scraper. DETAILED DESCRIPTION
[0015] See also Figure 1 In an embodiment of the utility model, a novel temperature-variable calcination and drying integrated phosphogypsum equipment comprises a kiln body 10, which is divided into a two-layer structure of an inner kiln 11 and an outer kiln 12. The kiln tail side of the inner kiln 11 and the outer kiln 12 are connected to each other, a kiln head feeder 15 is provided on the kiln head side of the outer kiln 12, and the discharge end of the kiln head feeder 15 extends to the interior of the inner kiln 11, a kiln head separation box 13 is provided on the kiln head of the kiln body 10, a combustion mixer 16 is connected to the kiln head side of the outer kiln 12, the combustion mixer 16 extends to the interior of the inner kiln 11, and a pulverized coal gas burner 17 is connected to the other side of the combustion mixer 16, and the combustion mixer 16 introduces hot air into the inner kiln 11 in a high rotation state. The combustion mixer 16 is directly connected to the pulverized coal gas burner 17, and also has certain throttling reasons, which can promote the full combustion of pulverized coal. The input end of the pulverized coal gas burner 17 is connected to a pulverized coal gas fan 26, and the pulverized coal gas fan 26 is connected to a pulverized coal mill 27. The pulverized coal mill 27 is a device for loading pulverized coal, and the pulverized coal is crushed by a coal particle crusher before being transported to the pulverized coal mill 27. Subsequently, the pulverized coal is transported to the pulverized coal gas burner 17 through the pulverized coal gas fan 26, and through the combustion mixer 16, the pulverized coal is fully burned to generate high temperature, thereby subjecting the material discharged from the discharge end of the kiln head feeder 15 to high-temperature calcination.
[0016] Preferably, an exhaust gas emission pipe 18 is connected to the upper side of the kiln head separation box 13, and the exhaust gas emission pipe 18 and the interior of the outer kiln 12 are interconnected. The exhaust gas emission pipe 18 is connected to a cyclone dust collector 19 at the discharge end, and the discharged exhaust gas can be dusted by the cyclone dust collector 19. The upper end discharge port of the cyclone dust collector 19 is connected to an induced draft fan 20, and the dusted exhaust gas is discharged through the induced draft fan 20. A feed sealed conveying scraper 28 is provided at the lower end discharge port of the kiln body 10, and the discharge end of the feed sealed conveying scraper 28 and the feed end of the kiln head feeder 15 are interconnected. The exhaust gas discharged from the exhaust gas emission pipe 18 can be dusted by the cyclone dust collector 19, and the dust is discharged from the lower end discharge port of the cyclone dust collector 19 to the feed sealed conveying scraper 28, and then transported to the interior of the inner layer kiln 11 again through the feed sealed conveying scraper 28, thereby reducing the waste of materials.
[0017] Preferably, a kiln head secondary air inlet 14 is provided on the outer surface of the kiln head side of the outer kiln 12, the inner side end of the kiln head secondary air inlet 14 extends to the interior of the outer kiln 12 and is connected to an air distribution cylinder section 25, the air distribution cylinder section 25 is annularly sleeved and fixedly arranged on the outer surface of the kiln head side of the inner kiln 11, and air distribution single pipes 23 are fixedly connected to the outer surface of the inner kiln 11 at equal intervals, one side of the air distribution single pipe 23 is connected to the air distribution cylinder section 25, and the other side of the air distribution single pipe 23 extends to the kiln tail side of the inner kiln 11, and the outer side end of the kiln head secondary air inlet 14 is connected to The dust extraction fan 22 blows air toward the inside of the secondary air inlet 14 at the kiln head. After the blowing, the introduced air is dispersed to the inside of each air distribution tube 23 through the air distribution cylinder section 25, so that the wind can evenly enter the inside of the outer kiln 12 and the inside of the inner kiln 11 for full mixing. The air distribution cylinder section 25 and the air distribution tube 23 are provided to allow the wind to be evenly distributed in an annular direction into the inside of the outer kiln 12, avoiding the blockage of the air duct by the material and causing uneven annular air volume, thereby ensuring full mixing of the material and the hot gas.
[0018] Preferably, the inner kiln 11 is provided with a high-temperature calcination zone near the kiln head side, and a drying zone near the kiln tail side. The discharge end of the kiln head feeder 15 is located in the high-temperature calcination zone of the inner kiln 11. A one-way valve 24 is provided on the surface of the kiln head feeder 15. The one-way valve 24 can prevent flashback and ensure that when positive operating pressure occurs, the kiln head feeder 15 will not flash back outward to form an unsafe accident in production.
[0019] Preferably, the discharge end of the kiln head feeder 15 is arranged in a horn shape, and the bending direction is toward the kiln tail side of the kiln body 10, so as to prevent the possibility of tempering of high-temperature hot air under certain circumstances.
[0020] Preferably, a powder sealed conveying scraper 21 is provided at the lower end of the discharge port of the kiln head separation box 13. After the high-temperature calcined and dried materials are discharged from the kiln head separation box 13, the materials are transported and collected by the powder sealed conveying scraper 21 and sent to the next process.
[0021] The working principle of the utility model is: the material that needs high-temperature calcination and drying is added to the interior of the inner kiln 11 from the upper end of the kiln head feeder 15, and the pulverized coal is supplied through the pulverized coal gas fan 26, and is fully burned in the interior of the pulverized coal gas burner 17, and the hot air is introduced into the interior of the inner kiln 11 in a high-rotation state through the combustion mixer 16, so as to promote the full mixing of the material and the hot air and timely and high-speed combustion of the impurities that need to be burned in the material. The combustion mixer 16 is directly connected to the pulverized coal gas burner 17, and also has certain throttling reasons, which can promote the full combustion of the pulverized coal. After the material is calcined at high temperature, it is dried in the interior of the inner kiln 11, and ventilated from the secondary air inlet 14 of the kiln head toward the interior of the air distribution tube section 25 through the dust extraction fan 22. The annular air distribution through the air distribution single tube 23 allows the wind to enter the outer kiln evenly. The dried material is discharged from the kiln tail side of the inner kiln 11 and enters the inner kiln 12, and then moves from the kiln tail side of the outer kiln 12 to the kiln head side of the outer kiln 12, and finally discharged from the kiln head separation box 13, and the material is transported and collected by the powder sealing conveying scraper 21, and transported to the next step, and the exhaust gas is discharged through the exhaust gas exhaust pipe 18, and dedusted by the cyclone dust collector 19, and the powder is collected by the feed sealing conveying scraper 28, and is re-fed into the inner kiln 11 from the kiln head feeder 15, so as to reduce the waste of materials, and the dust-free gas is discharged through the induced draft fan 20.
[0022] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.
Claims
1. A novel temperature-variable calcination and drying integrated phosphogypsum equipment, comprising a kiln body (10), characterized in that: The kiln body (10) is divided into a two-layer kiln body of an inner kiln (11) and an outer kiln (12); the kiln tail side of the inner kiln (11) and the outer kiln (12) are connected to each other; a kiln head feeder (15) is provided on the kiln head side of the outer kiln (12); and the discharge end of the kiln head feeder (15) extends into the interior of the inner kiln (11); a kiln head separation box (13) is provided at the kiln head of the kiln body (10); a combustion mixer (16) is connected to the kiln head side of the outer kiln (12); the combustion mixer (16) extends into the interior of the inner kiln (11); the other side of the combustion mixer (16) is connected to a pulverized coal gas burner (17); the input end of the pulverized coal gas burner (17) is connected to a pulverized coal gas blower (26); and the pulverized coal gas blower (26) is connected to a pulverized coal mill (27).
2. A novel temperature-variable calcination and drying integrated phosphogypsum equipment according to claim 1, characterized in that: The upper side of the kiln head separation box (13) is connected to an exhaust gas emission pipe (18), the exhaust gas emission pipe (18) and the interior of the outer kiln (12) are interconnected, the exhaust gas emission pipe (18) is connected to a cyclone dust collector (19) at the discharge end, the upper end discharge port of the cyclone dust collector (19) is connected to an induced draft fan (20), and a feed sealed conveying scraper (28) is provided at the lower end discharge port of the kiln body (10), and the discharge end of the feed sealed conveying scraper (28) and the feed end of the kiln head feeder (15) are interconnected.
3. The novel temperature-variable calcination and drying integrated phosphogypsum equipment according to claim 1 is characterized in that: The outer surface of the kiln head side of the outer kiln (12) is provided with a kiln head secondary air inlet (14), the inner side end of the kiln head secondary air inlet (14) extends into the interior of the outer kiln (12) and is connected to an air distribution cylinder section (25), the air distribution cylinder section (25) is annularly sleeved and fixedly arranged on the outer surface of the kiln head side of the inner kiln (11), the outer surface of the inner kiln (11) is equidistantly fixed with air distribution single tubes (23), one side of the air distribution single tube (23) and the air distribution cylinder section (25) are interconnected, the other side of the air distribution single tube (23) extends to the kiln tail side of the inner kiln (11), and the outer side end of the kiln head secondary air inlet (14) is connected to a dust extraction fan (22).
4. The novel temperature-variable calcination and drying integrated phosphogypsum equipment according to claim 1 is characterized in that: The inner kiln (11) is provided with a high-temperature calcining zone near the kiln head, and a drying zone near the kiln tail of the inner kiln (11). The discharge end of the kiln head feeder (15) is located in the high-temperature calcining zone of the inner kiln (11), and a one-way valve (24) is provided on the surface of the kiln head feeder (15).
5. The novel temperature-variable calcination and drying integrated phosphogypsum equipment according to claim 4 is characterized in that: The discharge end of the kiln head feeder (15) is arranged in a ram-horn shape, and its bending direction is toward the kiln tail side of the kiln body (10).
6. The novel temperature-variable calcination and drying integrated phosphogypsum equipment according to claim 1 is characterized in that: A powder sealing conveying scraper (21) is provided at the lower end of the discharge port of the kiln head separation box (13).