Melamine tail gas recycling device

Abstract

The utility model relates to the technical field of melamine processing, and provides a melamine tail gas recycling device which comprises a recycling tank, a collecting pipe is arranged at the upper end of the recycling tank, a rotary energy recovery assembly is arranged outside the recycling tank, and a condensation processing assembly is arranged on the recycling tank. The rotary energy recovery assembly comprises a fixed cover, the rotary cover and the fixed cover are movably connected in an inserted mode, a heat preservation pipe is arranged at the bottom of the rotary cover, a positioning ring groove is formed in the heat preservation pipe, a positioning disc is sleeved with the positioning ring groove, the positioning disc and the positioning ring groove are movably sleeved, a connecting ring is arranged at the lower end of the positioning disc, and a heat conduction pipe is arranged in the heat preservation pipe. The upper end of the heat conduction pipe is inserted into the rotating cover, and the lower end penetrates through the heat preservation pipe. According to the technical scheme, the problems that in the prior art, during extraction in the melamine tail gas recovery process, the distillation effect is poor due to the fact that the heated heating surface is not uniform, and steam collection is not concentrated in the condensation process are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of melamine processing, and specifically to a melamine tail gas recovery and utilization device. Background Art

[0002] Melamine, commonly known as melamine and protein essence, has a molecular formula of C3H6N6 and is named "1,3,5-triazine-2,4,6-triamine" by IUPAC. It is a triazine-type nitrogen-containing heterocyclic organic compound used as a chemical raw material. It is a white monoclinic crystal, almost odorless, harmful to the body, and cannot be used in food processing or food additives.

[0003] Melamine is an important nitrogen heterocyclic organic chemical raw material. It is mainly used as the main raw material for the manufacture of melamine formaldehyde resin (MF), an organic element analysis reagent, and is also used in the synthesis of organic and resins as a tanning agent and filler for leather processing. It is also used in wood, plastics, coatings, papermaking, textiles, leather, electrical, pharmaceutical and other industries. It can also be used as a flame retardant, formaldehyde cleaner, fertilizer, etc. Melamine is the most commonly used gas source for intumescent flame retardants and is also the raw material for the preparation of many intumescent flame retardant components (such as various phosphates, cyanurate, phosphates). It is also often compounded with other flame retardants to flame retard a variety of plastics and other polymers, such as used in combination with organic phosphates to flame retard polyurethane foam.

[0004] After melamine is processed, a lot of tail gas will be produced, and this kind of gas can be recycled and reused. When extracting the melamine tail gas during recovery, the uneven heating surface leads to poor distillation effect, and the steam is not collected in a concentrated manner during the condensation process. In view of this, a melamine tail gas recovery and utilization device is developed. Utility Model Content

[0005] The utility model provides a melamine tail gas recovery and utilization device, which solves the problems in the prior art of poor distillation effect caused by uneven heating surface during extraction in the melamine tail gas recovery process and unconcentrated steam collection during the condensation process.

[0006] The technical solution of the utility model is as follows:

[0007] A recovery tank, wherein a collection pipe is provided at the upper end of the recovery tank;

[0008] A rotation energy recovery component, wherein the rotation energy recovery component is arranged outside the recovery tank;

[0009] A condensation processing assembly, wherein the condensation processing assembly is arranged on the recovery tank;

[0010] The rotary energy recovery component includes a fixed cover, which is fixedly mounted on the recovery tank, the upper end of the collecting pipe extends out of the fixed cover, the lower end of the fixed cover is connected with a rotating cover, the rotating cover and the fixed cover are movably plug-in connected, an insulation pipe is arranged at the bottom of the rotating cover, a positioning ring groove is opened on the insulation pipe, a positioning plate is mounted inside the positioning ring groove, the positioning plate and the positioning ring groove are movably mounted, a connecting ring is arranged at the lower end of the positioning plate, a heat conduction pipe is arranged inside the insulation pipe, the upper end of the heat conduction pipe is inserted into the rotating cover, and the lower end of the heat conduction pipe passes through the insulation pipe.

[0011] As a further technical solution, the positioning plate is composed of two semicircular shapes, and the positioning plate is connected to the positioning ring groove via a bearing.

[0012] As a further technical solution, the condensation processing assembly includes a one-way guide plate, which is arranged inside the recovery tank. A steam exhaust pipe is arranged at one end of the recovery tank, one end of the steam exhaust pipe extends out of the fixed cover, one end of the steam exhaust pipe is connected to a condensing pipe, and the steam exhaust pipe is located at the lower end of the one-way guide plate.

[0013] As a further technical solution, a heat recovery pipe is provided on the side surface of the fixed cover, and an extension pipe is provided on the heat recovery pipe.

[0014] As a further technical solution, the collecting pipe is sealedly connected to the fixed cover, a connecting plate is provided on the top of the collecting pipe, and a connecting bolt hole is provided on the connecting plate.

[0015] As a further technical solution, the bottom of the connecting ring is provided with supporting feet, the number of the supporting feet is four, and the supporting feet are evenly distributed on the bottom surface of the connecting ring.

[0016] As a further technical solution, the fixed cover has the same structure as the rotating cover, and both the fixed cover and the rotating cover are cylindrical structures.

[0017] As a further technical solution, a fixed mounting frame is provided inside the fixed cover, and one end of the fixed mounting frame is fixedly connected to the recovery tank.

[0018] As a further technical solution, the inner bottom surface of the recovery tank is provided with a high temperature resistant protective layer.

[0019] As a further technical solution, a docking groove is formed at the upper end of the connecting disk.

[0020] The working principle and beneficial effects of the utility model are:

[0021] In the utility model, a pipeline is connected through a connecting plate. After the pipeline for discharging melamine is connected to the connecting plate, the melamine liquid in the recovery tank is distilled by heating. The upper end surface of the one-way guide plate can achieve a guide effect, and the lower end surface of the one-way guide plate can achieve a steam collection effect, so that the steam is discharged from the steam discharge pipe in a more concentrated manner and condensed through the condenser. The recovery tank can be heated more evenly by rotating the rotating cover, and the rotation of the rotating cover can be driven by a motor through gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a cross-sectional view of the utility model;

[0025] Figure 3 It is a top view of the utility model;

[0026] Figure 4 This is an axial view of the thermal insulation pipe of the utility model;

[0027] In the figure: 1. Recovery tank; 2. Collection pipe; 3. Rotary energy recovery assembly; 3-1. Fixed cover; 3-2. Rotating cover; 3-3. Insulation pipe; 3-4. Positioning ring groove; 3-5. Positioning plate; 3-6. Connecting ring; 3-7. Heat transfer pipe; 4. Condensation processing assembly; 4-1. One-way guide plate; 4-2. Steam discharge pipe; 4-3. Condenser pipe; 5. Heat recovery pipe; 6. Extension pipe; 7. Connecting plate; 8. Connecting bolt hole; 9. Support foot; 10. Fixed mounting frame; 11. High temperature resistant protective layer; 12. Docking groove. DETAILED DESCRIPTION

[0028] The following will be combined with 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 of 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] like Figure 1~Figure 4 As shown, this embodiment proposes a melamine tail gas recovery and utilization device, comprising

[0030] A recovery tank 1, wherein a collecting pipe 2 is disposed at the upper end of the recovery tank 1;

[0031] A rotation energy recovery component 3, which is arranged outside the recovery tank 1;

[0032] A condensation processing assembly 4, wherein the condensation processing assembly 4 is arranged on the recovery tank 1;

[0033] The rotary energy recovery component 3 includes a fixed cover 3-1, which is fixedly mounted on the recovery tank 1. The upper end of the collecting pipe 2 extends out of the fixed cover 3-1, and the lower end of the fixed cover 3-1 is connected to a rotating cover 3-2. The rotating cover 3-2 and the fixed cover 3-1 are movably plug-in connected. An insulation pipe 3-3 is arranged at the bottom of the rotating cover 3-2. A positioning ring groove 3-4 is opened on the insulation pipe 3-3. A positioning disk 3-5 is mounted inside the positioning ring groove 3-4. The positioning disk 3-5 is movably mounted between the positioning ring groove 3-4. A connecting ring 3-6 is arranged at the lower end of the positioning disk 3-5. A heat conduction pipe 3-7 is arranged inside the insulation pipe 3-3. The upper end of the heat conduction pipe 3-7 is inserted into the rotating cover 3-2, and the lower end of the heat conduction pipe 3-7 passes through the insulation pipe 3-3.

[0034] In this embodiment, the collecting pipe 2 on the recovery tank 1 is used to connect the pipeline for discharging melamine, and the melamine liquid flowing into the recovery tank 1 is heated. The heating is achieved by inserting a burner into the heat pipe 3-7. The burner can be placed on the bottom surface of the connecting ring 3-6. During the rotation of the rotating cover 3-2, the burner can be driven to rotate together with the rotating cover 3-2, thereby achieving more uniform heating of the recovery tank 1. The rotation of the rotating cover 3-2 can be driven by a motor-driven gear, and the rotation can be achieved by the fixed set gear on the insulation pipe 3-3 engaging with it.

[0035] Specifically, the positioning plate 3-5 is composed of two semicircular shapes, the positioning plate 3-5 is connected to the positioning ring groove 3-4 by a bearing, the condensation processing component 4 includes a one-way guide plate 4-1, the one-way guide plate 4-1 is arranged inside the recovery tank 1, a steam exhaust pipe 4-2 is arranged at one end of the recovery tank 1, one end of the steam exhaust pipe 4-2 extends out of the fixed cover 3-1, one end of the steam exhaust pipe 4-2 is connected to the condensation pipe 4-3, and the steam exhaust pipe 4-2 is located at the lower end of the one-way guide plate 4-1.

[0036] In this embodiment, the positioning plate 3-5 can be easily spliced ​​and assembled, so that the positioning plate 3-5 is spliced ​​and inserted into the positioning ring groove 3-4, which can make the rotating cover 3-2 more stable during rotation. The upper end surface of the one-way guide plate 4-1 can achieve the effect of guide, and the lower end surface of the one-way guide plate 4-1 can achieve the effect of steam collection, so that the steam is discharged from the steam exhaust pipe 4-2 in a more concentrated manner, and enters the condensation pipe 4-3 during the steam exhaust process to realize the condensation process.

[0037] Furthermore, a heat recovery pipe 5 is provided on the side surface of the fixed cover 3-1, an extension pipe 6 is provided on the heat recovery pipe 5, the collecting pipe 2 and the fixed cover 3-1 are sealed and connected, a connecting plate 7 is provided on the top of the collecting pipe 2, a connecting bolt hole 8 is provided on the connecting plate 7, and a supporting foot 9 is provided at the bottom of the connecting ring 3-6. The number of the supporting feet 9 is four, and the supporting feet 9 are evenly distributed on the bottom surface of the connecting ring 3-6.

[0038] In this embodiment, the heat recovery pipe 5 can collect and discharge the heat generated by the burner in a unified manner, and the heat recovery pipe 5 can also be connected to other pipelines to recover and reuse the heat energy.

[0039] Furthermore, the fixed cover 3-1 and the rotating cover 3-2 have the same structure. Both the fixed cover 3-1 and the rotating cover 3-2 are cylindrical structures. A fixed mounting frame 10 is arranged inside the fixed cover 3-1. One end of the fixed mounting frame 10 is fixedly connected to the recovery tank 1. A high-temperature resistant protective layer 11 is arranged on the inner bottom surface of the recovery tank 1. A docking groove 12 is opened at the upper end of the connecting plate 7.

[0040] In this embodiment, the high temperature resistant protective layer 11 can effectively protect the service life of the recovery tank 1 after being heated, and the fixed mounting frame 10 has a fixing effect on the recovery tank 1, and the docking groove 12 is used to improve the sealing when the pipelines are docked.

[0041] When melamine tail gas recovery is required, the collecting pipe 2 on the recovery tank 1 is used to connect the pipeline for discharging melamine, and the melamine liquid flowing into the recovery tank 1 is heated. The heating is achieved by inserting a burner into the heat conduction pipe 3-7. The burner can be placed on the bottom surface of the connecting ring 3-6. During the rotation of the rotating cover 3-2, the burner and the rotating cover 3-2 can be driven to rotate together, so that the heating of the recovery tank 1 is more uniform. The upper end surface of the unidirectional guide plate 4-1 can achieve the effect of diversion, and the lower end surface of the unidirectional guide plate 4-1 can achieve the effect of steam collection, so that the steam is discharged from the steam discharge pipe 4-2 in a more concentrated manner, and enters the condensation pipe 4-3 during the steam discharge process to achieve the condensation process.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. 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. A melamine tail gas recovery and utilization device, characterized in that: include A recovery tank (1), wherein a collection pipe (2) is provided at the upper end of the recovery tank (1); A rotation energy recovery component (3), wherein the rotation energy recovery component (3) is arranged outside the recovery tank (1); A condensation processing component (4), wherein the condensation processing component (4) is arranged on the recovery tank (1); The rotary energy recovery component (3) comprises a fixed cover (3-1), the fixed cover (3-1) is fixedly mounted on the recovery tank (1), the upper end of the collecting pipe (2) extends out of the fixed cover (3-1), the lower end of the fixed cover (3-1) is connected to a rotating cover (3-2), the rotating cover (3-2) and the fixed cover (3-1) are movably plug-in connected, the bottom of the rotating cover (3-2) is provided with a heat preservation pipe (3-3), and the heat preservation pipe (3-3) is provided with a A positioning ring groove (3-4) is provided inside the positioning ring groove (3-4), a positioning plate (3-5) is sleeved inside the positioning ring groove (3-4), the positioning plate (3-5) and the positioning ring groove (3-4) are movably sleeved between each other, a connecting ring (3-6) is provided at the lower end of the positioning plate (3-5), a heat conduction pipe (3-7) is provided inside the heat preservation pipe (3-3), the upper end of the heat conduction pipe (3-7) is inserted into the rotating cover (3-2), and the lower end of the heat conduction pipe (3-7) passes through the heat preservation pipe (3-3).

2. A melamine tail gas recovery and utilization device according to claim 1, characterized in that: The positioning disc (3-5) is composed of two semicircular shapes spliced ​​together, and the positioning disc (3-5) is connected to the positioning ring groove (3-4) via a bearing.

3. A melamine tail gas recovery and utilization device according to claim 1, characterized in that: The condensation processing assembly (4) comprises a one-way guide plate (4-1), wherein the one-way guide plate (4-1) is arranged inside the recovery tank (1), a steam exhaust pipe (4-2) is arranged at one end of the recovery tank (1), one end of the steam exhaust pipe (4-2) extends out of the fixed cover (3-1), one end of the steam exhaust pipe (4-2) is connected to a condensation pipe (4-3), and the steam exhaust pipe (4-2) is located at the lower end of the one-way guide plate (4-1).

4. The melamine tail gas recovery and utilization device according to claim 1, characterized in that: A heat recovery pipe (5) is provided on the side surface of the fixed cover (3-1), and an extension pipe (6) is provided on the heat recovery pipe (5).

5. The melamine tail gas recovery and utilization device according to claim 1, characterized in that: The collecting pipe (2) is sealedly connected to the fixed cover (3-1); a connecting plate (7) is provided on the top of the collecting pipe (2); and a connecting bolt hole (8) is provided on the connecting plate (7).

6. The melamine tail gas recovery and utilization device according to claim 1, characterized in that: The bottom of the connecting ring (3-6) is provided with supporting feet (9), the number of the supporting feet (9) is four, and the supporting feet (9) are evenly distributed on the bottom surface of the connecting ring (3-6).

7. The melamine tail gas recovery and utilization device according to claim 1, characterized in that: The fixed cover (3-1) and the rotating cover (3-2) have the same structure, and both the fixed cover (3-1) and the rotating cover (3-2) are cylindrical structures.

8. The melamine tail gas recovery and utilization device according to claim 1, characterized in that: A fixed mounting frame (10) is arranged inside the fixed cover (3-1), and one end of the fixed mounting frame (10) is fixedly connected to the recovery tank (1).

9. The melamine tail gas recovery and utilization device according to claim 1, characterized in that: The inner bottom surface of the recovery tank (1) is provided with a high temperature resistant protective layer (11).

10. The melamine tail gas recovery and utilization device according to claim 5, characterized in that: The upper end of the connecting plate (7) is provided with a docking groove (12).

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