Desulfurized gypsum forming calcining furnace with preheating structure

Abstract

The utility model discloses a desulfurized gypsum forming calcining furnace with a preheating structure, which comprises a base, a middle barrel is mounted at the upper end of the base in an inserting manner, an upper cover is placed at the upper end of the middle barrel, an air inlet mechanism is arranged in the base, and the heating stability is ensured in a rotary air supply manner. According to the desulfurized gypsum forming calcining furnace with the preheating structure, the mode that desulfurized gypsum to be processed is placed in the upper end of the middle barrel to be preheated is adopted, so that the desulfurized gypsum can be preheated before calcining, and therefore internal moisture can be evaporated in an accelerated mode in the calcining process and is prevented from being influenced by a hardened shell; the mode that calcining airflow heats a heating medium in the heat exchange bag through the heat exchange plate is adopted, so that moisture contained in the calcining airflow cannot enter the upper end of the middle barrel, and therefore it is guaranteed that uncalcined gypsum cannot further absorb moisture, the upper cover cannot be opened in the drying and preheating process, and scalding is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurized gypsum processing, in particular to a desulfurized gypsum forming calcining furnace provided with a preheating structure. Background Art

[0002] Desulfurized gypsum, also known as flue gas desulfurization gypsum, is a kind of solid waste widely used after flue gas desulfurization. It is a natural gypsum containing various elements, which is generated by desulfurization reaction in industrial production. The main component of desulfurized gypsum is CaSO4·2H2O, which is rich in Ca and S elements and has excellent hardening and water resistance. Therefore, desulfurized gypsum is widely used in building materials, chemical industry, agriculture and other fields. The processing of desulfurized gypsum requires crushing and grinding the desulfurized gypsum to finally obtain the required gypsum powder. First, the desulfurized gypsum is crushed after preliminary treatment. The purpose of crushing is to make the gypsum particles more delicate and Uniform, convenient for subsequent grinding operations. The desulfurized gypsum after grinding and crushing needs to be ground. The main purpose of grinding is to further refine the gypsum particles and improve the quality of the gypsum. During the grinding process, it is necessary to pay attention to controlling the size and distribution of the gypsum particles, and add a certain fluidizing agent during the grinding process to make the gypsum powder more delicate and uniform. Commonly used grinding equipment includes ball mills, vertical mills, etc. Calcination is the core link in the preparation of desulfurized gypsum. Its purpose is to remove moisture and impurities in the gypsum through high-temperature calcination. During the calcination process, the instantaneous high temperature will cause the outer layer of the desulfurized gypsum to dry rapidly, which will have an adverse effect on the subsequent calcination and dehydration of the gypsum. Utility Model Content

[0003] The utility model aims to provide a desulfurized gypsum forming calcining furnace with a preheating structure to solve the problem in the above-mentioned background technology that the outer shell of the desulfurized gypsum is hardened so that the internal moisture cannot be dried.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a desulfurized gypsum forming calcining furnace with a preheating structure, comprising a base, a middle barrel is plugged and installed on the upper end of the base, and an upper cover is placed on the upper end of the middle barrel, and an air intake mechanism is arranged inside the base to ensure stable heating by rotating air supply.

[0005] Preferably, the air intake mechanism includes: a reinforcing connecting rod, which is fixedly arranged on the upper surface of the base, and an air supply joint is fixedly installed on the upper end of the reinforcing connecting rod, a rotating barrel is installed on the inner bottom surface of the base, and air injection holes are opened on the side surface of the rotating barrel, a central column is fixedly arranged inside the upper end of the middle barrel, and the lower end of the central column passes through the lower surface of the middle barrel and is fixedly connected to the air outlet joint, and the upper end of the central column is fixedly connected to the air intake joint.

[0006] By adopting the above technical solution, the air inlet joint can be connected to the external pipeline to inject hot air into the central column.

[0007] Preferably, the air supply joint is rotatably connected to the rotating barrel, and the upper end of the air supply joint is snap-fitted and installed with the lower end of the air outlet joint, the air jet holes are evenly distributed on the side surface of the rotating barrel, and the air jet holes are obliquely arranged, the center column is hollow in design, and the upper end of the center column passes through the upper surface of the upper cover, and the upper cover and the center column are connected by sliding friction.

[0008] By adopting the above technical solution, the rotating barrel can rotate during the process of jetting through the jet holes to ensure uniform heating.

[0009] Preferably, a heat exchange mechanism is provided inside the middle barrel to assist in preheating the gypsum to be processed by utilizing the residual heat from calcination.

[0010] By adopting the above technical solution, the gypsum can be preheated before calcination to ensure that the internal moisture evaporates quickly.

[0011] Preferably, the heat exchange mechanism includes: a connecting pipe, which is opened inside the lower end side surface of the middle barrel, and a heat exchange channel is opened inside the upper end side surface of the middle barrel, the lower end of the connecting pipe passes through the lower end inner surface of the middle barrel, an air outlet is opened on the upper end outer surface of the middle barrel, and the end of the air outlet facing the inside of the middle barrel is connected with the upper end of the heat exchange channel, a heat exchange bag is fixedly provided on the upper end inner surface of the middle barrel, and a heat exchange plate is fixedly provided on the inner surface of the heat exchange bag, a sliding support bracket is provided on the side surface of the center column, and a sliding locking rod is installed inside the upper end side surface of the center column.

[0012] By adopting the above technical solution, the heat exchange bag can preheat the gypsum through contact with the air inside the middle barrel.

[0013] Preferably, the lower end of the heat exchange channel is connected to the upper end of the connecting pipe, and the heat exchange channel is of spiral design, one end of the heat exchange plate is located inside the heat exchange bag, and the other end of the heat exchange plate passes through the side surface of the heat exchange channel.

[0014] By adopting the above technical solution, the hot air can achieve heat conduction through contact with the heat exchange plate during the process of spiral rising in the heat exchange channel.

[0015] Preferably, the surface of the support bracket is of hollow design, one end of the locking rod passes through the inner surface of the center column, and the locking rod and the center column are connected by sliding friction, and a spring is connected between the locking rod and the center column, and the lower surface of one end of the locking rod facing the outside of the center column is flush with the upper surface of the upper cover.

[0016] By adopting the above technical solution, the upper cover cannot be opened during the calcination process.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the desulfurized gypsum forming calcining furnace with a preheating structure:

[0018] 1. The desulfurized gypsum to be processed is prevented from being preheated inside the upper end of the middle barrel, so that the desulfurized gypsum can be preheated before calcination, so that the internal moisture can evaporate faster during calcination to avoid being affected by the hardened shell;

[0019] 2. Furthermore, the calcined airflow is used to heat the heating medium in the heat exchange bag through the heat exchange plate, so that the moisture contained in the calcined airflow will not enter the upper end of the middle barrel, thereby ensuring that the uncalcined gypsum will not further absorb moisture;

[0020] 3. Furthermore, after air is injected into the center column through the air inlet joint to increase pressure, the locking rod automatically extends to limit the upper cover, so that the upper cover cannot be opened during the drying and preheating process to prevent burns. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the connection between the middle barrel and the heat exchange bag of the utility model;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection between the base and the rotating barrel of the utility model;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the overall cutaway surface of the utility model;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the utility model in the overall explosion state;

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the cross-section surface connecting the central column and the locking rod of the utility model.

[0027] In the figure: 1. base; 2. middle barrel; 3. upper cover; 4. reinforcing connecting rod; 5. air supply joint; 6. rotating barrel; 7. air jet hole; 8. center column; 9. air outlet joint; 10. air inlet joint; 11. connecting pipe; 12. heat exchange channel; 13. air outlet; 14. heat exchange bag; 15. heat exchange plate; 16. support bracket; 17. locking rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-6 The utility model provides a technical solution: a desulfurized gypsum forming calcining furnace with a preheating structure.

[0030] Embodiment 1

[0031] The present embodiment discloses: a base 1, a middle barrel 2 is plugged and installed on the upper end of the base 1, and an upper cover 3 is placed on the upper end of the middle barrel 2, and an air intake mechanism is arranged inside the base 1 to ensure stable heating by rotating air supply;

[0032] The air intake mechanism includes: a reinforcing connecting rod 4, which is fixedly arranged on the upper surface of the base 1, and an air supply joint 5 is fixedly installed on the upper end of the reinforcing connecting rod 4, a rotating barrel 6 is installed on the bottom surface of the base 1, and an air injection hole 7 is opened on the side surface of the rotating barrel 6, a central column 8 is fixedly arranged inside the upper end of the middle barrel 2, and the lower end of the central column 8 passes through the lower surface of the middle barrel 2 and is fixedly connected to an air outlet joint 9, and the upper end of the central column 8 is fixedly connected to an air intake joint 10;

[0033] The air supply joint 5 is rotatably connected to the rotating barrel 6, and the upper end of the air supply joint 5 is engaged with the lower end of the air outlet joint 9, the air jet holes 7 are evenly distributed on the side surface of the rotating barrel 6, and the air jet holes 7 are obliquely arranged, the central column 8 is hollow, and the upper end of the central column 8 passes through the upper surface of the upper cover 3, and the upper cover 3 and the central column 8 are connected by sliding friction;

[0034] When in use, first put the gypsum raw material to be calcined into the interior of the base 1, then insert the lower end of the middle barrel 2 into the upper end of the base 1 to seal the base 1, and then connect the air inlet pipe to the air inlet joint 10. At this time, the high-temperature gas is injected into the air supply joint 5 through the air outlet joint 9 that is snap-connected to the lower end of the center column 8. The air supply joint 5 supported and installed by the reinforcing connecting rod 4 injects the gas into the rotating barrel 6 and finally sprays it out through the air jet hole 7 to calcine the gypsum raw material. When the gas is sprayed out, the inclined air jet hole 7 drives the rotating barrel 6 to rotate through the reaction force of the gas, thereby ensuring the uniform calcination of the gypsum raw material inside the base 1.

[0035] Embodiment 2

[0036] This embodiment is based on the embodiment 1 and discloses that: a heat exchange mechanism is provided inside the middle barrel 2 to assist in preheating the gypsum to be processed by utilizing the residual heat of calcination;

[0037] The heat exchange mechanism includes: a connecting pipe 11, the connecting pipe 11 is opened inside the lower end side surface of the middle barrel 2, and a heat exchange channel 12 is opened inside the upper end side surface of the middle barrel 2, the lower end of the connecting pipe 11 passes through the lower end inner surface of the middle barrel 2, an air outlet 13 is opened on the upper end outer surface of the middle barrel 2, and one end of the air outlet 13 facing the inside of the middle barrel 2 is connected with the upper end of the heat exchange channel 12, a heat exchange capsule 14 is fixedly provided on the upper end inner surface of the middle barrel 2, and a heat exchange plate 15 is fixedly provided on the inner surface of the heat exchange capsule 14, a sliding support bracket 16 is provided on the side surface of the central column 8, and a sliding locking rod 17 is installed inside the upper end side surface of the central column 8;

[0038] The lower end of the heat exchange channel 12 is connected to the upper end of the connecting pipe 11, and the heat exchange channel 12 is designed in a spiral shape. One end of the heat exchange plate 15 is located inside the heat exchange bag 14, and the other end of the heat exchange plate 15 passes through the side surface of the heat exchange channel 12;

[0039] The surface of the support bracket 16 is hollowed out, one end of the locking rod 17 passes through the inner surface of the center column 8, and the locking rod 17 and the center column 8 are connected by sliding friction, and a spring is connected between the locking rod 17 and the center column 8, and the lower surface of the end of the locking rod 17 facing the outside of the center column 8 is flush with the upper surface of the upper cover 3;

[0040] After the gypsum raw materials are placed, the next batch of gypsum raw materials to be calcined is placed on the upper surface of the support bracket 16. The upper cover 3 is mounted on the upper surface of the center column 8 to seal the upper end of the center barrel 2. When the air intake pipe is connected to the air intake joint 10 to inject high-temperature gas into the center column 8, the gas pressure pushes the locking rod 17 to slide outward and fit with the upper surface of the upper cover 3 through the lower end, so that the upper cover 3 cannot be opened during the calcination process. The calcined air passes through the lower end of the connecting pipe 11 and enters the heat exchange channel 12 upward, spirally rises along the heat exchange channel 12 and is finally discharged through the outlet 13. During the process, the hot air heats the heat-conducting medium inside the heat exchange bag 14 through contact with the heat exchange plate 15, so that the heat exchange bag 14 can heat the air inside the center barrel 2 so that the gypsum raw materials on the support bracket 16 can be preheated.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A desulfurized gypsum forming calcining furnace with a preheating structure, comprising a base (1), a middle barrel (2) being plugged and installed on the upper end of the base (1), and an upper cover (3) being placed on the upper end of the middle barrel (2), characterized in that: An air intake mechanism is provided inside the base (1) to ensure stable heating by rotating air supply; The air intake mechanism comprises: a reinforcing connecting rod (4), the reinforcing connecting rod (4) being fixedly arranged on the upper surface of the base (1), and an air supply joint (5) being fixedly arranged on the upper end of the reinforcing connecting rod (4), a rotating barrel (6) being mounted on the bottom surface of the base (1), and an air injection hole (7) being provided on the side surface of the rotating barrel (6), a central column (8) being fixedly arranged inside the upper end of the middle barrel (2), and a lower end of the central column (8) penetrating the lower surface of the middle barrel (2) and being fixedly connected to an air outlet joint (9), and an upper end of the central column (8) being fixedly connected to an air intake joint (10); The air supply joint (5) is rotatably connected to the rotating barrel (6), and the upper end of the air supply joint (5) is engaged with the lower end of the air outlet joint (9) for installation, the air jet holes (7) are evenly distributed on the side surface of the rotating barrel (6), and the air jet holes (7) are arranged obliquely, the central column (8) is hollow in design, and the upper end of the central column (8) passes through the upper surface of the upper cover (3), and the upper cover (3) and the central column (8) are connected by sliding friction.

2. A desulfurized gypsum forming calcining furnace with a preheating structure according to claim 1, characterized in that: A heat exchange mechanism is provided inside the middle barrel (2) to assist in preheating the gypsum to be processed by utilizing the residual heat from calcination.

3. A desulfurized gypsum forming calcining furnace with a preheating structure according to claim 2, characterized in that: The heat exchange mechanism comprises: a connecting pipe (11), the connecting pipe (11) is opened inside the lower end side surface of the middle barrel (2), and a heat exchange channel (12) is opened inside the upper end side surface of the middle barrel (2), the lower end of the connecting pipe (11) passes through the lower end inner surface of the middle barrel (2), the upper end outer surface of the middle barrel (2) is opened with an air outlet (13), and one end of the air outlet (13) facing the inside of the middle barrel (2) is connected to the upper end of the heat exchange channel (12), a heat exchange capsule (14) is fixedly provided on the upper end inner surface of the middle barrel (2), and a heat exchange plate (15) is fixedly provided on the inner surface of the heat exchange capsule (14), a sliding support frame (16) is provided on the side surface of the central column (8), and a sliding locking rod (17) is installed inside the upper end side surface of the central column (8).

4. A desulfurized gypsum forming calcining furnace with a preheating structure according to claim 3, characterized in that: The lower end of the heat exchange channel (12) is connected to the upper end of the connecting pipe (11), and the heat exchange channel (12) is of spiral design. One end of the heat exchange plate (15) is located inside the heat exchange bag (14), and the other end of the heat exchange plate (15) passes through the side surface of the heat exchange channel (12).

5. The desulfurized gypsum forming calcining furnace with a preheating structure according to claim 3, characterized in that: The surface of the support frame (16) is of hollow design, one end of the locking rod (17) passes through the inner surface of the central column (8), the locking rod (17) and the central column (8) are connected by sliding friction, and a spring is connected between the locking rod (17) and the central column (8), and the lower surface of one end of the locking rod (17) facing the outside of the central column (8) is flush with the upper surface of the upper cover (3).

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