Melamine reaction gas quenching purification column
By installing a gas deceleration support and gas deceleration components inside the melamine reaction gas quenching and purification tower, the gas residence time is extended and the gas is evenly distributed, solving the problem of insufficient contact between high-temperature gas and cooling water, improving condensation and purification effects, and enhancing the recovery and purification efficiency of melamine.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG SHUNTIAN CHEM GRP
- Filing Date
- 2025-08-28
- Publication Date
- 2026-07-21
AI Technical Summary
In existing melamine reactive gas quenching and purification towers, the high-temperature gas rises rapidly inside the tower, resulting in insufficient contact with cooling water, low heat exchange efficiency, poor purification effect, and uncondensed impurities are easily discharged with the gas.
A gas deceleration support and gas deceleration components, including gas guide pipes and spiral blades, are installed inside the tower to extend the gas residence time and redistribute the gas through a gas distribution network, so that it can be in uniform contact with the cooling water and enhance the heat exchange efficiency.
It improved the condensation and crystallization efficiency of melamine vapor and the quality of gas purification, reduced the discharge of uncondensed impurities, and enhanced the recovery efficiency and purification effect of melamine.
Smart Images
Figure CN224524009U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of quenching and purification towers, and in particular to a quenching and purification tower for melamine reactive gases. Background Technology
[0002] Melamine, as an important chemical raw material, is widely used in plastics, coatings, adhesives, and other fields. During melamine production, the reaction generates a high-temperature mixed gas containing melamine vapor and other impurities. This gas needs to undergo rapid cooling and purification to recover melamine and purify the gas, preventing the emission of harmful substances or interference with subsequent processes. The melamine reaction gas rapid cooling and purification tower is a key piece of equipment in this stage. Its core function is to rapidly cool and condense melamine vapor to crystallize, and then remove impurities from the gas through purification methods, ultimately obtaining gaseous and solid melamine products that meet process requirements.
[0003] In existing technologies, melamine reactive gases typically enter the quenching purification tower at a high flow rate. Due to the strong kinetic energy of the gas itself, and the fact that the flow path inside the tower is often a straight-through or simple guiding structure, the gas rises rapidly within the tower, resulting in a short residence time. Under these conditions, it is difficult for the high-temperature gas to achieve sufficient and uniform contact with the cooling water sprayed from the top of the tower: on the one hand, the rapidly flowing gas may impact the cooling water flow, disrupting the liquid film or droplet distribution formed by the spray and reducing heat exchange efficiency; on the other hand, the short contact time results in insufficient heat transfer between the gas and the cooling water, affecting not only the condensation effect of melamine but also potentially causing some uncondensed impurities to be discharged with the gas, reducing purification efficiency. Therefore, this application proposes a melamine reactive gas quenching purification tower to solve the above problems. Utility Model Content
[0004] The main objective of this invention is to provide a melamine reactive gas quenching and purification tower, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A melamine reactive gas quenching and purification tower includes a tower body. Two sets of gas deceleration supports are fixedly installed inside the tower body. Each gas deceleration support consists of an installation pipe and a support plate. There are two support plates, both of which are fixedly installed on the inner wall of the installation pipe. A gas distribution net is fixedly installed on the upper inner wall of the installation pipe. The gas distribution net is located above the two support plates. Several gas deceleration components are fixedly inserted into the two support plates. Each gas deceleration component consists of a gas guide pipe, a mounting base rod, and a spiral blade. The mounting base rod is located inside the gas guide pipe and is coaxial with the gas guide pipe. The spiral blade is fixedly installed on the outer wall of the mounting base rod and the inner wall of the gas guide pipe.
[0006] Preferably, an equipment base is fixedly installed at the lower end of the tower body, and a cooling water circulation device is fixedly installed at the upper end of the equipment base and on one side of the tower body. A demister is fixedly installed on the upper inner wall of the tower body, and two sets of spray assemblies are fixedly installed inside the tower body and below the demister. The spray assemblies are connected to the cooling water circulation device through pipes, and the two sets of spray assemblies are respectively located above two sets of gas deceleration supports.
[0007] Preferably, an air inlet pipe is fixedly inserted into the wall of the tower body and below the gas deceleration support below.
[0008] Preferably, the mounting pipe on the gas deceleration bracket is fixedly installed on the inner wall of the tower body, and the support plate has a number of mounting through holes, with the mounting through holes on the upper and lower support plates being coaxial.
[0009] Preferably, the gas guide pipe on the gas deceleration assembly is fixedly inserted into the mounting through holes opened on the two support plates, and the upper end of the gas guide pipe is flush with the upper end of the upper support plate.
[0010] Compared with the prior art, the present invention has the following beneficial effects: By installing a gas deceleration support inside the tower, and a gas deceleration component on the support, when the high-temperature mixed gas enters the tower from the inlet pipe, it comes into contact with the gas deceleration support. The gas then rises through the guide pipe in the gas deceleration component. Since a mounting base rod coaxial with the guide pipe is installed inside, and helical blades are fixedly installed on the outer wall of the mounting base rod and the inner wall of the guide pipe, the gas rises in a spiral shape along the path of the helical blades as it flows through the guide pipe. This increases the flow path of the gas within the tower, thereby reducing the rising velocity of the gas and prolonging its residence time within the tower, resulting in higher gas concentration and better gas flow. The warm gas can fully contact the cooling water sprayed from the upper spray assembly, improving heat exchange efficiency and facilitating the condensation and crystallization of melamine vapor. By setting a gas distribution net above the gas deceleration assembly, the gas flows out of the gas guide pipe and passes through the distribution net first. The distribution net can redistribute the gas, making the gas evenly distributed in the tower body. This avoids the situation where the gas rises in a concentrated manner and causes uneven contact with the cooling water, thereby further improving the contact efficiency between the gas and the cooling water, enhancing the rapid cooling and purification effect, reducing the possibility of uncondensed impurities being discharged with the gas, and improving the melamine recovery efficiency and gas purification quality. Attached Figure Description
[0011] Figure 1 This is a bottom view of the tower body after sectional cutting. Figure 2 This is a top view of the tower body after sectional cutting. Figure 3 This is a schematic diagram of the disassembled structure of the gas deceleration bracket and gas distribution net of this utility model. Figure 4 This is a schematic diagram of the structure of the gas deceleration support of this utility model; Figure 5 This is a cross-sectional schematic diagram of the gas guide pipe on the gas deceleration component of this utility model.
[0012] In the diagram: 1. Tower body; 2. Gas deceleration support; 3. Gas distribution network; 4. Gas deceleration assembly; 5. Cooling water circulation equipment; 6. Spray assembly; 7. Demister; 8. Inlet pipe; 9. Equipment base; 10. Mounting pipe; 11. Support plate; 12. Mounting through hole; 13. Gas guide pipe; 14. Mounting base rod; 15. Spiral blade. Detailed Implementation
[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0014] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, a melamine reactive gas quenching and purification tower includes a tower body 1. Two sets of gas deceleration supports 2 are fixedly installed inside the tower body 1. Each gas deceleration support 2 consists of an installation pipe 10 and support plates 11. There are two support plates 11, both fixedly installed on the inner wall of the installation pipe 10. A gas distribution net 3 is fixedly installed on the upper inner wall of the installation pipe 10, located above the two support plates 11. Several gas deceleration components 4 are fixedly inserted into the two support plates 11. Each gas deceleration component 4 consists of a gas guide pipe 13 and a mounting base rod. The system consists of a mounting base 14 and a spiral blade 15. The mounting base 14 is located inside the gas guide pipe 13 and is coaxial with the gas guide pipe 13. The spiral blade 15 is fixedly installed on the outer wall of the mounting base 14 and the inner wall of the gas guide pipe 13. A gas deceleration support 2 is installed inside the tower body 1, and a gas deceleration assembly 4 is installed on the gas deceleration support 2. When the high-temperature mixed gas enters the tower body 1 from the inlet pipe 8, it will contact the gas deceleration support 2. The gas rises through the gas guide pipe 13 in the gas deceleration assembly 4. An installation base rod 14, coaxial with the gas guide pipe 13, is installed inside the pipe 13. Spiral blades 15 are fixedly installed on the outer wall of the installation base rod 14 and the inner wall of the gas guide pipe 13. This causes the gas to rise spirally along the path of the spiral blades 15 as it flows through the gas guide pipe 13, increasing the gas flow path within the tower and thus reducing the gas's rising speed. This prolongs the gas's residence time within the tower, allowing the high-temperature gas to fully contact the cooling water sprayed from the upper spray assembly 6, improving heat exchange efficiency and facilitating the condensation and crystallization of melamine vapor. Furthermore, a gas distribution net 3 is installed above the gas deceleration assembly 4. When the gas flows out of the gas guide pipe 13, it first passes through the gas distribution net 3, which redistributes the gas, ensuring uniform distribution within the tower body 1. This avoids uneven contact between the gas and cooling water caused by concentrated rising gas, further improving the gas-cooling water contact efficiency, enhancing the rapid cooling and purification effect, reducing the possibility of uncondensed impurities being discharged with the gas, and improving the melamine recovery efficiency and gas purification quality.
[0015] Specifically, an equipment base 9 is fixedly installed at the lower end of the tower body 1. A cooling water circulation device 5 is fixedly installed at the upper end of the equipment base 9 and on one side of the tower body 1. A demister 7 is fixedly installed on the upper inner wall of the tower body 1. Two sets of spray components 6 are fixedly installed inside the tower body 1 and below the demister 7. The spray components 6 are connected to the cooling water circulation device 5 through pipes. The two sets of spray components 6 are respectively located above the two sets of gas speed reduction supports 2. An air inlet pipe 8 is fixedly inserted into the wall of the tower body 1 and below the lower gas speed reduction support 2. The mounting pipe 10 on the gas speed reduction support 2 is fixedly installed on the inner wall of the tower body 1. Several mounting through holes 12 are opened on the support plate 11. The mounting through holes 12 opened on the upper and lower support plates 11 are coaxial. The gas guide pipe 13 on the gas speed reduction component 4 is fixedly inserted into the mounting through holes 12 opened on the two support plates 11. The upper end of the gas guide pipe 13 is flush with the upper end of the upper support plate 11.
[0016] In operation, the high-temperature mixed gas enters the lower part of the tower body 1 through the inlet pipe 8. During its ascent, it first contacts the gas deceleration support 2 below. The gas then rises through the gas guide pipe 13 in the gas deceleration assembly 4 on the gas deceleration support 2. Since a mounting base rod 14 coaxial with the gas guide pipe 13 is installed inside the gas guide pipe 13, and spiral blades 15 are fixedly installed on the outer wall of the mounting base rod 14 and the inner wall of the gas guide pipe 13, the gas rises spirally along the path of the spiral blades 15 inside the gas guide pipe 13. After flowing out of the gas guide pipe 13, it first passes through the gas distribution net 3 for redistribution, so that the gas is evenly distributed inside the tower body 1. Then the gas continues to rise. The gas then comes into full contact with the cooling water sprayed from the spray assembly 6 located above the gas deceleration support 2 for heat exchange. The melamine vapor condenses and crystallizes, and the gas, having completed the initial rapid cooling and purification, continues to rise to the upper gas deceleration support 2. It then spirals upward along the spiral blades 15 through the gas guide pipe 13 in its gas deceleration assembly 4. After being redistributed by the gas distribution net 3, it comes into full contact with the cooling water sprayed from the upper spray assembly 6 again for deep rapid cooling and purification. Finally, after the water mist carried in the gas is removed by the demister 7, it is discharged from the top of the tower body 1. Meanwhile, the cooling water circulation equipment 5 provides cooling water to the two sets of spray assemblies 6 through pipelines, realizing the recycling of cooling water.
[0017] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A melamine reactive gas quenching and purification tower, comprising a tower body (1), characterized in that: Two sets of gas deceleration supports (2) are fixedly installed inside the tower body (1). The gas deceleration support (2) consists of an installation pipe (10) and a support plate (11). There are two support plates (11), both of which are fixedly installed on the inner wall of the installation pipe (10). A gas distribution net (3) is fixedly installed on the upper inner wall of the installation pipe (10). The gas distribution net (3) is located above the two support plates (11). Several gas deceleration components (4) are fixedly inserted on the two support plates (11). The gas deceleration component (4) consists of a gas guide pipe (13), an installation base rod (14), and a spiral blade (15). The installation base rod (14) is located inside the gas guide pipe (13) and is coaxial with the gas guide pipe (13). The spiral blade (15) is fixedly installed on the outer wall of the installation base rod (14) and the inner wall of the gas guide pipe (13).
2. The melamine reactive gas quenching and purification tower according to claim 1, characterized in that: A device base (9) is fixedly installed at the lower end of the tower body (1). A cooling water circulation device (5) is fixedly installed at the upper end of the device base (9) and on one side of the tower body (1). A demister (7) is fixedly installed on the upper inner wall of the tower body (1). Two sets of spray assemblies (6) are fixedly installed inside the tower body (1) and below the demister (7). The spray assemblies (6) are connected to the cooling water circulation device (5) through pipes. The two sets of spray assemblies (6) are located above the two sets of gas deceleration supports (2).
3. The melamine reactive gas quenching and purification tower according to claim 2, characterized in that: An air inlet pipe (8) is fixedly inserted on the wall of the tower body (1) and below the gas deceleration support (2).
4. The melamine reactive gas quenching and purification tower according to claim 3, characterized in that: The mounting tube (10) on the gas deceleration bracket (2) is fixedly installed on the inner wall of the tower body (1). Several mounting through holes (12) are opened on the support plate (11), and the mounting through holes (12) opened on the upper and lower support plates (11) are coaxial.
5. A melamine reactive gas quenching and purification tower according to claim 4, characterized in that: The gas deceleration assembly (4) has a gas guide pipe (13) fixedly inserted into the mounting through holes (12) opened on the two support plates (11), and the upper end of the gas guide pipe (13) is flush with the upper end of the support plate (11) above.