Expanded perlite expansion furnace

Abstract

An expansion furnace for expanded perlite effectively solves the problems of high energy consumption, insufficient primary expansion, and inconvenience in later processing in the current production of perlite. It includes a primary expansion furnace and a secondary expansion furnace, which are fixedly connected to each other; the primary expansion furnace includes a hollow first furnace body, a plurality of first flame spray nozzles are fixedly connected to the lower end of the first furnace body, and the plurality of first flame spray nozzles heat the first furnace body; a bellows is arranged below the first furnace body, and the wind in the bellows is communicated with the first flame spray nozzles through a pipeline; the secondary expansion furnace includes a hollow inner furnace body, which is connected to the first furnace body, a hollow refractory tube is arranged outside the inner furnace body, and there is a gap between the refractory tube and the inner furnace body, and a plurality of second flame spray nozzles are fixed to the upper and middle parts of the refractory tube, and the plurality of second flame spray nozzles heat the inner furnace body.

Description

Technical Field

[0001] The invention relates to the technical field of perlite production equipment, in particular to an expanded perlite expansion furnace. Background Art

[0002] Expanded perlite is a natural acidic glassy volcanic lava, a non-metallic mineral, including perlite, pitch rock and obsidian, the three of which only differ in the content of crystal water. Because its volume rapidly expands 4 to 30 times under high temperature conditions of 1000 to 1300°C, it is collectively called expanded perlite. Expanded perlite can be used as a filter, catalyst, molecular sieve, and a carrier for rubber, fertilizers, and pesticides. It is widely used in construction, metallurgy, petroleum, machinery, light industry, hydropower, casting, medicine, food, agriculture, forestry, and horticulture.

[0003] In the current production process of expanded rock, perlite usually expands once. At this time, the perlite still has many edges and corners, which causes great inconvenience to subsequent production and processing. In addition, a large amount of heat energy will be lost during preheating, resulting in a large energy loss problem. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an expanded perlite expansion furnace, which effectively solves the problems of high energy consumption, insufficient primary expansion and inconvenience in subsequent processing in the current perlite production.

[0005] The present invention is realized by the following technical scheme: an expanded perlite production process, including material processing and air duct dust removal, the material processing and air duct dust removal are completed in the entire expanded perlite production equipment;

[0006] Material processing includes the following steps: the first step is loading, the material enters the drying furnace through the loading bin;

[0007] In the second step, the material is preheated in the drying furnace and transported to one side;

[0008] In the third step, the preheated materials enter the elevator and are sent to the expansion furnace through the elevator;

[0009] In the fourth step, the material undergoes two expansions in the expansion furnace;

[0010] In the fifth step, the material after secondary expansion is transported to the drying furnace;

[0011] In the sixth step, the materials dried in the drying furnace are sent to the finished product silo;

[0012] Dust removal in the air duct includes the following steps: First, the outside wind passes through a small fan and enters the wind box;

[0013] In the second step, the wind in the bellows enters the expansion furnace;

[0014] In the third step, the wind in the expansion furnace enters the drying furnace;

[0015] Step 4: The air in the drying chamber enters the finished product silo;

[0016] In the fifth step, the wind in the finished product silo enters the cyclone separator;

[0017] Step 6: The wind in the cyclone separator enters the bag dust collector;

[0018] In the seventh step, the air in the bag filter is discharged through the outlet of the large fan.

[0019] An expanded perlite production device comprises a loading bin, a drying furnace and an expansion furnace;

[0020] The loading bin transports the material to the drying furnace, where it is preheated.

[0021] The drying oven has two functions: preheating and drying;

[0022] The expansion furnace expands the preheated material twice and then transports the material to the drying furnace for drying.

[0023] Preferably, the drying furnace comprises a hollow rotatable preheating cylinder, the material enters the preheating cylinder through the loading bin, a drying cylinder is fixedly connected to the preheating cylinder, both ends of the drying cylinder pass through the preheating cylinder, a spiral first feeding auger is fixedly connected to the preheating cylinder, a plurality of feed ports are provided on the outer circumference of the leftmost end of the preheating cylinder, the material in the loading bin enters the preheating cylinder through the feed ports, a discharge port is provided on the outer circumference of the rightmost end of the preheating cylinder, and the material in the preheating cylinder is discharged outward through the discharge port;

[0024] A second spiral feeding auger is fixedly connected in the drying cylinder, and the spiral conveying directions of the first feeding auger and the second feeding auger are opposite.

[0025] Preferably, a heat preservation cylinder is fixedly mounted on the outer side of the preheating cylinder.

[0026] Preferably, a first pulley is fixedly connected to the outer circumference of the preheating cylinder, the first pulley is connected to a second pulley via a belt, and the second pulley is driven to rotate by a motor.

[0027] Preferably, a rotating ring is fixedly mounted on the outer circumference of the preheating cylinder, a roller frame is provided below the preheating cylinder, a roller is rotatably provided on the upper end of the roller frame, and the rotating ring is in contact with the roller.

[0028] Preferably, the expansion furnace comprises a primary expansion furnace and a secondary expansion furnace, and the primary expansion furnace and the secondary expansion furnace are fixedly connected;

[0029] The primary expansion furnace comprises a hollow first furnace body, a plurality of first flame spray nozzles are fixedly connected to the lower end of the first furnace body, and the plurality of first flame spray nozzles heat the first furnace body;

[0030] A wind box is provided below the first furnace body, and the wind in the wind box is communicated with the first flame nozzle through a pipeline;

[0031] The secondary expansion furnace includes a hollow inner furnace body, which is connected to the first furnace body. A hollow refractory tube is arranged outside the inner furnace body. There is a gap between the refractory tube and the inner furnace body. A plurality of second flame spray nozzles are fixed on the upper and middle parts of the refractory tube to heat the inner furnace body.

[0032] Preferably, the lower end of the inner furnace body is connected to the drying cylinder.

[0033] Preferably, a plurality of funnels are fixed on the outer circumference of the lower part of the first furnace body, and a material receiving trough is provided below the funnel, the material receiving trough is fixedly connected to the first furnace body, the material receiving trough is arranged obliquely downward, the material receiving trough is at a high position close to the funnel side, and the inner end of the material receiving trough is placed inside the first furnace body;

[0034] A charge box is provided above the multiple funnels. The charge box is fixedly connected to the first furnace body, and the charge box is connected to the funnels through multiple discharge pipes.

[0035] Preferably, the loading bin includes a material storage bin, the lower end of which is a funnel-shaped structure, an inclined feeding pipe is provided below the material storage bin, the other end of the feeding pipe is fixedly connected to a storage ring body, the feeding pipe is at the lower end close to the material storage bin, the storage ring body is rotatably connected to the preheating cylinder, and the storage ring body transports material into the preheating cylinder through the feed port.

[0036] Preferably, a feeding auger is rotatably provided in the feeding pipe.

[0037] In the present invention, the heat required for drying the expanded material is used to preheat the initial material to reduce energy loss. At the same time, we innovatively adopt the secondary expansion technology, which is a first-of-its-kind technology in the entire industry. It can better achieve the melting of the material, eliminate the edges and corners of the material, and reduce energy loss. The use of low-nitrogen technology can well achieve the goal of energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 It is a schematic diagram of the overall axial side structure of the present invention;

[0040] Figure 3 It is a schematic diagram of the structure of the expansion furnace of the present invention;

[0041] Figure 4This is a schematic diagram of the axial side structure of the expansion furnace of the present invention;

[0042] Figure 5 This is a schematic diagram of the drying furnace and loading bin structure of the present invention;

[0043] Figure 6 It is a schematic diagram of the structure of the drying furnace of the present invention after partial cutaway;

[0044] Figure 7 It is a schematic diagram of the overall structure of the drying furnace of the present invention;

[0045] Figure 8 It is a schematic diagram of the structure of the primary expansion furnace and the secondary expansion furnace of the present invention;

[0046] Fig. 9 for Figure 8 Schematic diagram of the structure after removing some refractory tubes;

[0047] Among them: 1. Loading bin; 2. Drying furnace; 3. Elevator; 4. Expansion furnace; 5. Finished product bin; 6. Cyclone separator; 7. Bag dust collector; 8. Preheating cylinder; 9. Drying cylinder; 10. First feeding auger; 11. Feeding port; 12. Discharging port; 13. Second feeding auger; 14. Insulation cylinder; 15. First pulley; 16. Second pulley; 17. Rotating ring; 18. Roller; 19. Roller frame; 20. Primary expansion furnace; 21. Secondary expansion furnace; 22. First furnace body; 23. First flame nozzle; 24. Bellows; 25. Inner furnace body; 26. Refractory pipe; 27. Funnel; 28. Receiving trough; 29. ​​Furnace material box; 30. Feeding pipe; 31. Material storage bin, 32. Feeding pipe, 33. Storage ring body. DETAILED DESCRIPTION

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0050] like Figure 1-9A process for producing expanded perlite is shown, including material processing and air duct dust removal, wherein the material processing and air duct dust removal are completed in the entire expanded perlite production equipment;

[0051] The material processing includes the following steps: the first step is loading, the material passes through the loading bin 1 and enters the drying furnace 2;

[0052] In the second step, the material is preheated in the drying furnace 2 and transported to one side;

[0053] In the third step, the pre-heated material enters the elevator 3 and is delivered to the expansion furnace 4 through the elevator 3;

[0054] In the fourth step, the material undergoes two expansions in the expansion furnace 4;

[0055] Step 5: After the secondary expansion, the material is transported to the drying furnace 2;

[0056] Step 6: The materials dried in the drying furnace 2 are sent to the finished product silo 5;

[0057] Dust removal in the air duct includes the following steps: First, the outside wind passes through the small fan and enters the wind box 24;

[0058] In the second step, the wind in the wind box 24 enters the expansion furnace 4;

[0059] In the third step, the wind in the expansion furnace 4 enters the drying furnace 2;

[0060] Step 4: The air in the drying chamber enters the finished product bin 5;

[0061] Step 5: The wind in the finished product silo 5 enters the cyclone separator 6;

[0062] Step 6: The wind in the cyclone separator 6 enters the bag dust collector 7;

[0063] In the seventh step, the wind in the bag filter 7 is discharged through the outlet of the large fan.

[0064] In the present invention, we replace the expanded perlite with materials, and we will directly use materials to illustrate in the following description. The materials first enter the drying furnace 2 through the loading bin 1, and are preheated in and out of the drying furnace 2. The preheated materials are transported to the expansion furnace 4 through the elevator 3. The materials are expanded twice in the expansion furnace 4. The current market is a single expansion technology, which will waste energy, and the expanded perlite has edges and corners, and cannot be perfectly melted. We use secondary expansion technology to fully melt the materials and eliminate the prisms of the materials. In addition, low nitrogen technology is used in the secondary expansion process, which meets the national standards for energy conservation and emission reduction.

[0065] After the secondary expansion, the material is input into the drying furnace 2 again and dried in the drying furnace 2. The drying furnace 2 is used to preheat the material initially and dry it in the drying furnace 2. The waste heat in the drying furnace 2 can be used to preheat the material, thereby fully utilizing the energy and meeting the requirements of energy saving and environmental protection.

[0066] The dried material directly enters the finished product silo 5, completing the entire processing process of the material;

[0067] During the entire material processing process, there is also a process of air duct dust removal. The external wind is sucked into the bellows 24 through a small fan. The bellows 24 is provided with an air duct. The air duct sends the wind to the expansion furnace 4, blowing the expanded material to move. The entire wind passes through the expansion furnace 4 into the drying furnace 2, and then enters the finished product silo 5. The wind in the finished product silo 5 passes through the cyclone separator 6 and the bag dust collector 7 for dust removal. Finally, the wind passing through the bag dust collector 7 is discharged through the outlet of the large fan.

[0068] An expanded perlite production device comprises a loading bin 1, a drying furnace 2, and an expansion furnace 4;

[0069] The loading bin 1 conveys the material to the drying furnace 2, and performs preliminary preheating in the drying furnace 2;

[0070] The drying oven 2 has two functions: preheating and drying;

[0071] The expansion furnace 4 expands the preheated material twice and then transports the material to the drying furnace 2 for drying.

[0072] In the whole process of producing expanded perlite, a variety of processing equipment is involved, which is a system, including a loading bin 1, a drying furnace 2, and an expansion furnace 4. The loading bin 1 is used to transport the original material to the drying furnace 2, and the material is preheated in the drying furnace 2. The preheated material enters the expansion furnace 4, and the expansion furnace 4 expands the material twice. The second expansion can effectively eliminate the edges and corners of the material and realize the melting of the material. The material after the second expansion enters the drying furnace 2 to dry the material. The drying furnace 2 is both the initial preheating and the later drying. The large amount of heat contained in the expanded material is used to preheat the new material, so that energy can be saved well. The dried material enters the finished product bin 5 to complete the entire processing process of the expanded perlite.

[0073] The entire expansion furnace 4 utilizes low-nitrogen technology to improve efficiency, and the material after secondary expansion eliminates edges and corners, which can better realize the melting process. This can be said to be a pioneering attempt and progress in the entire industry, which can greatly improve production efficiency and make processing perfect.

[0074] The drying furnace 2 includes a hollow rotatable preheating cylinder 8, the material enters the preheating cylinder 8 through the upper bin 1, a drying cylinder 9 is fixedly connected to the preheating cylinder 8, both ends of the drying cylinder 9 pass through the preheating cylinder 8, a spiral first feeding auger 10 is fixedly connected to the preheating cylinder 8, a plurality of feed ports 11 are opened on the outer circumference of the leftmost end of the preheating cylinder 8, the material in the upper bin 1 enters the preheating cylinder 8 through the feed port 11, a discharge port 12 is opened on the outer circumference of the rightmost end of the preheating cylinder 8, and the material in the preheating cylinder 8 is discharged outward through the discharge port 12;

[0075] A second spiral feeding auger 13 is fixedly connected inside the drying cylinder 9 , and the spiral conveying directions of the first feeding auger 10 and the second feeding auger 13 are opposite.

[0076] In the present invention, our preheating cylinder 8 is arranged to rotate and is in a rotating state. The loading bin 1 transports the material through the feed port 11 to the preheating cylinder 8. The first feeding auger 10 is fixedly connected to the preheating cylinder 8. At this time, the preheating cylinder 8 is in a rotating state, thereby pushing the material to move to the right and sending the material to the discharge port 12. The preheated material is discharged from the discharge port 12 and enters the elevator 3. The preheated material is transported to the expansion furnace 4 by the elevator 3 to expand the material.

[0077] The expanded material enters the drying cylinder 9, which is fixedly connected to the preheating cylinder 8, and the two are coaxial and spaced apart. The drying cylinder 9 is also in a rotating state, and the second feeding auger 13 also rotates with the drying cylinder 9. Because the directions of the first feeding auger 10 and the second conveying auger are opposite, the material in the drying cylinder 9 moves to the left and enters the finished product silo 5.

[0078] A heat preservation cylinder 14 is fixedly mounted on the outer side of the preheating cylinder 8 .

[0079] Because our drying furnace 2 involves two parts, preheating and drying, the drying is carried out in the innermost drying cylinder 9. At this time, the expanded perlite carries a large amount of heat energy, which diffuses outward into the preheating cylinder 8, and can directly preheat the initial material. An insulation cylinder 14 is arranged on the outermost side of the preheating cylinder 8, and there is a gap between the insulation cylinder 14 and the preheating cylinder 8, so as to minimize the loss of heat energy.

[0080] The outer circumference of the preheating cylinder 8 is fixedly connected with a first pulley 15, the first pulley 15 is connected with a second pulley 16 via a belt, and the second pulley 16 is driven to rotate by a motor.

[0081] The first pulley 15 and the second pulley 16 can be completely replaced by the first sprocket and the second sprocket. We drive the transmission system through a motor to drive our preheating cylinder 8 to rotate.

[0082] A rotating ring 17 is fixedly mounted on the outer circumference of the preheating cylinder 8 , a roller frame 19 is arranged below the preheating cylinder 8 , a roller 18 is rotatably arranged on the upper end of the roller frame 19 , and the rotating ring 17 is in contact with the roller 18 .

[0083] The roller frame 19 is placed on the ground, the roller 18 is rotatably connected to the roller frame 19, and the roller 18 is in contact with the rotating ring 17. At this time, our roller 18 can play a good supporting role and have a good auxiliary effect.

[0084] The expansion furnace 4 includes a primary expansion furnace 20 and a secondary expansion furnace 21, and the primary expansion furnace 20 and the secondary expansion furnace 21 are fixedly connected;

[0085] The primary expansion furnace 20 includes a hollow first furnace body 22, and a plurality of first flame spray nozzles 23 are fixedly connected to the lower end of the first furnace body 22, and the plurality of first flame spray nozzles 23 heat the first furnace body 22;

[0086] A wind box 24 is provided below the first furnace body 22, and the wind in the wind box 24 is communicated with the first flame nozzle 23 through a pipeline;

[0087] The secondary expansion furnace 21 includes a hollow inner furnace body 25, which is connected to the first furnace body 22. A hollow refractory tube 26 is provided on the outer side of the inner furnace body 25. There is a gap between the refractory tube 26 and the inner furnace body 25. A plurality of second flame nozzles are fixed on the upper and middle parts of the refractory tube 26, and the plurality of second flame nozzles heat the inner furnace body 25.

[0088] In the present invention, we innovatively adopt the secondary expansion technology, which is the first in the entire industry. After the secondary expansion, the material can eliminate the edges and corners of the material well and achieve perfect melting technology. The low nitrogen technology used in the secondary expansion can well improve efficiency, save energy and reduce emissions. The material enters the lower part of the primary expansion furnace 20. At this time, the bellows 24 blows air into the first furnace body 22, and multiple first flame nozzles 23 ignite to heat the first furnace body 22, so that our first furnace body 22 obtains a suitable temperature. The unit weight of the material after the primary expansion is lighter. Under the action of wind and heat, the material moves upward to the second furnace body. The first furnace body 22 and the second furnace body are arranged in parallel and fixedly connected by a bent pipe. The material that has undergone one expansion enters the inner furnace body 25. The material in the inner furnace body 25 is transported from top to bottom. A plurality of second flame nozzles are arranged on the outer side of the middle and lower part of the inner furnace body 25 to heat the inner furnace body 25 and expand the material for a second time. The material after two expansions can be well molten. A refractory tube 26 is arranged on the outer side of the inner furnace body 25 to minimize heat loss and improve efficiency.

[0089] The lower end of the inner furnace body 25 is connected to the drying cylinder 9 .

[0090] The material that has undergone secondary expansion enters the drying cylinder 9 from the inner furnace body 25 to proceed to the next process step.

[0091] A plurality of funnels 27 are fixed on the outer circumference of the lower part of the first furnace body 22, and a material receiving trough 28 is provided below the funnel 27. The material receiving trough 28 is fixedly connected to the first furnace body 22, and the material receiving trough 28 is arranged obliquely downward, and the material receiving trough 28 is at a high position close to the funnel 27, and the inner end of the material receiving trough 28 is placed in the first furnace body 22;

[0092] A charge box 29 is provided above the multiple funnels 27 . The charge box 29 is fixedly connected to the first furnace body 22 . The charge box 29 is connected to the funnels 27 via multiple discharge pipes 30 .

[0093] In the present invention, the material coming out of the preheating cylinder 8 is transported to our furnace charge box 29 through the elevator 3. The furnace charge box 29 transports the material to multiple funnels 27 by its own weight, and then enters our first furnace body 22 through the receiving trough 28. In this way, the material can be fully separated, which is convenient for expansion heating and makes the heating more uniform.

[0094] The loading bin 1 includes a material storage bin 31, the lower end of which is a funnel-shaped structure. An inclined feeding pipe 32 is provided below the material storage bin 31, and a storage ring body 33 is fixedly connected to the other end of the feeding pipe 32. The feeding pipe 32 is close to the material storage bin 31 as the lower end. The storage ring body 33 is rotatably connected to the preheating cylinder 8, and the storage ring body 33 transports materials into the preheating cylinder 8 through the feed port 11.

[0095] The initial material is placed in the material storage bin 31 , and the material is transported to the storage ring body 33 through the feeding pipe 32 . The feed port 11 is covered in the storage ring body 33 , and the material enters the preheating cylinder 8 through the feed port 11 .

[0096] A feeding auger is rotatably provided in the feeding pipe 32 .

[0097] By rotating the feeding auger, the initial material is driven to be transported obliquely upward, and then enters the preheating cylinder 8, completing the feeding process of the material.

[0098] In the present invention, the heat required for drying the expanded material is used to preheat the initial material to reduce energy loss. At the same time, we innovatively adopt the secondary expansion technology, which is a first-of-its-kind technology in the entire industry. It can better achieve the melting of the material, eliminate the edges and corners of the material, and reduce energy loss. The use of low-nitrogen technology can well achieve the goal of energy conservation and emission reduction.

[0099] In the present invention, one thing that needs to be explained is that our elevator 3, cyclone separator 6 and bag filter 7 are now very mature technologies, and we have not made any improvements on them, so we will not describe the structure of this part in detail.

[0100] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An expanded perlite expansion furnace, characterized in that: It comprises a primary expansion furnace (20) and a secondary expansion furnace (21), wherein the primary expansion furnace (20) and the secondary expansion furnace (21) are fixedly connected; The primary expansion furnace (20) comprises a hollow first furnace body (22), a plurality of first flame spray nozzles (23) being fixedly connected to the lower end of the first furnace body (22), and the plurality of first flame spray nozzles (23) heat the first furnace body (22); A wind box (24) is provided below the first furnace body (22), and wind in the wind box (24) is communicated with the first flame spray nozzle (23) through a pipeline; The secondary expansion furnace (21) comprises a hollow inner furnace body (25), the inner furnace body (25) being connected to the first furnace body (22), a hollow refractory tube (26) being arranged outside the inner furnace body (25), a gap being provided between the refractory tube (26) and the inner furnace body (25), a plurality of second flame spray nozzles being fixed to the upper part and the middle part of the refractory tube (26), and the plurality of second flame spray nozzles heating the inner furnace body (25); The lower end of the inner furnace body (25) is connected to the drying cylinder (9); A plurality of funnels (27) are fixed on the outer circumference of the lower part of the first furnace body (22), a material receiving trough (28) is provided below the funnel (27), the material receiving trough (28) is fixedly connected to the first furnace body (22), the material receiving trough (28) is arranged obliquely downward, the material receiving trough (28) is at a high position close to the side of the funnel (27), and the inner end of the material receiving trough (28) is placed inside the first furnace body (22); A furnace charge box (29) is provided above the multiple funnels (27); the furnace charge box (29) is fixedly connected to the first furnace body (22); and the furnace charge box (29) is connected to the funnels (27) via multiple discharge pipes (30).

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