A smoke absorption device
By introducing a cyclone separator and an internal and external spiral pipe cooling system into the nitrous oxide absorption device, the problem of insufficient nitrous oxide pretreatment in traditional devices is solved, achieving efficient removal of particulate matter and temperature control of nitrous oxide, and improving the absorption efficiency of nitrous oxide and the absorption effect of nitrogen oxides.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU MEIRUN NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-09-08
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional nitrous oxide fume absorption devices lack a pretreatment mechanism, which allows large particles of dust and impurities in the nitrous oxide fume to enter the absorption tower, reducing absorption efficiency and increasing equipment maintenance costs. At the same time, high-temperature nitrous oxide fume is not conducive to the absorption of nitrogen oxides, affecting the absorption effect.
The device employs a combination of a nitrile smoke compressor, a cyclone separator, a cooler, and a multi-stage absorption tower. The cyclone separator removes particulate matter, and the internal and external spiral pipes are combined with a cooling water circulation system for cooling, thus achieving nitrile smoke pretreatment and temperature control.
It improved the efficiency of nitrous oxide absorption, reduced equipment maintenance costs, and enhanced the absorption effect of nitrogen oxides.
Smart Images
Figure CN224573503U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nitrous smoke absorption technology, specifically a nitrous smoke absorption device. Background Technology
[0002] In the production process of nitro-o-xylene, the efficiency of nitrate fume absorption is a key factor affecting environmental quality and production safety. With increasingly stringent environmental protection requirements and rising public demands for environmental quality, improving nitrate fume absorption efficiency has become an urgent problem to be solved in the chemical production field. Traditional nitrate fume absorption devices, due to their simple design and low efficiency, cannot meet current production and environmental protection needs. Currently, many chemical enterprises mainly rely on direct absorption methods for their nitrate fume absorption devices, where the nitrate fume directly enters the absorption tower and comes into contact with the absorbent liquid, undergoing simple physical or chemical reactions. Due to the lack of a pretreatment stage, large particles and impurities in the nitrate fume directly enter the absorption device, resulting in low absorption efficiency and increased equipment maintenance costs. Simultaneously, improper temperature control of the nitrate fume, with high-temperature nitrate fume being detrimental to the absorption of harmful components such as nitrogen oxides, affects the absorption effect. Therefore, it is necessary to develop a nitrate fume absorption device that can pretreat the nitrate fume and control its temperature to improve absorption efficiency. Utility Model Content
[0003] To address the above technical problems, this utility model provides a smoke absorption device that can pre-treat smoke and control its temperature, thereby improving smoke absorption efficiency and solving the problem that existing smoke absorption devices lack a smoke pre-treatment mechanism, resulting in low subsequent absorption efficiency.
[0004] To solve the above-mentioned technical problems, the present invention provides a smoke absorption device, comprising a smoke compressor and a multi-stage absorption tower. The inlet end of the smoke compressor is connected to each smoke-generating unit via a pipe. The outlet end of the smoke compressor is connected to the inlet end of a cyclone separator via an air inlet pipe. The outlet end of the cyclone separator is connected to the inlet end of a cooler via an air outlet pipe. An outer spiral tube is fixedly connected inside the cooler, and an inner spiral tube is fixedly connected inside the outer spiral tube. A flue gas channel is formed between the inner spiral tube and the outer spiral tube. Both ends of the inner spiral tube are connected to a cooling water circulation system. The air outlet pipe is connected to one end of the outer spiral tube, and the other end of the outer spiral tube is connected to the multi-stage absorption tower via a pipe.
[0005] Furthermore, the cooling water circulation system adopts a cooling water circulator, and the two ends of the inner spiral tube are respectively connected to the circulation inlet and circulation outlet of the cooling water circulator.
[0006] Furthermore, an air pump is connected to the pipeline between the outer spiral tube and the multi-stage absorption tower.
[0007] Furthermore, one end of the cooler is connected to the outlet end of the cooling water circulator via a circulation inlet pipe, and the other end is connected to the inlet end of the cooling water circulator via a circulation outlet pipe.
[0008] This utility model has the following advantages compared with the prior art:
[0009] 1. This utility model connects the outlet end of the nitrile smoke compressor to the inlet end of the cyclone separator, enabling preliminary treatment of nitrile smoke exhaust gas and reducing the content of particulate matter and solid impurities. By setting up a cooler and forming a flue gas channel between the inner and outer spiral tubes, connecting the output end of the cyclone separator to the flue gas channel, and connecting the inner spiral pipe to the cooling water circulation system, the nitrile smoke exhaust gas can be cooled, avoiding the problem of poor absorption of nitrogen oxides due to high temperature.
[0010] 2. By connecting the two ends of the cooler to the inlet and outlet ends of the cooling water circulator respectively, this utility model can increase the flow channel of cooling water, realize the simultaneous internal and external cooling of the smog, and further improve the cooling efficiency of the smog. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model.
[0012] Figure 2 This is a view of the internal structure of the cooler.
[0013] In the diagram: 1. Smoke compressor, 2. Cyclone separator, 3. Cooler, 301. Outer spiral tube, 302. Inner spiral tube, 303. Circulation inlet pipe, 304. Circulation outlet pipe, 4. Cooling water circulator, 5. Air pump, 6. Multi-stage absorption tower. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings.
[0015] The production process of 3-nitro-o-xylene and 4-nitro-o-xylene generates a large amount of acidic nitrous oxide gas. Given the increasing environmental protection requirements, nitrous oxide absorption has become an important step in the production of 3-nitro-o-xylene and 4-nitro-o-xylene. Traditional nitrous oxide fume absorption typically involves drawing nitrous oxide exhaust gases from the workshop, intermediate tank area, nitric acid evaporation unit, nitric acid concentration unit, and sulfuric acid concentration unit into a nitrous oxide compressor. The nitrous oxide is then passed into a multi-stage absorption tower for direct contact with the absorbent liquid for spray absorption. However, because the nitrous oxide fume contains large particles and impurities, these impurities directly enter the multi-stage absorption tower. This not only reduces the throughput efficiency of the packing layer within the absorption tower but also increases equipment maintenance costs. Furthermore, the high temperature of the nitrous oxide entering the multi-stage absorption tower hinders the absorption of harmful components such as nitrogen oxides, significantly reducing the absorption effect. To address these operational problems, a nitrous oxide fume absorption device has been developed to pre-treat the nitrous oxide fume, removing most of the particulate matter and reducing its temperature, thereby improving absorption efficiency and effectiveness.
[0016] Example 1:
[0017] like Figure 1 The illustrated smoke absorption device includes a smoke compressor 1 and a multi-stage absorption tower 6. Two smoke compressors 1 are installed, one for standby and one for operation. The inlet of the smoke compressor 1 is connected to each smoke-generating unit via a pipe. The smoke compressor 1 is consistent with existing devices, and the specific pipe connection method is the same as the traditional method. The outlet of the smoke compressor 1 is connected to the inlet of a cyclone separator 2 via an air inlet pipe. The outlet of the cyclone separator 2 is connected to the inlet of a cooler 3 via an air outlet pipe. An outer spiral tube 301 is fixedly connected inside the cooler 3, and an inner spiral tube 302 is fixedly connected inside the outer spiral tube 301. The inner spiral tube 302 and the outer spiral tube 301 are supported and fixed by multiple spaced connecting rods. A connection is formed between the inner spiral tube 302 and the outer spiral tube 301. The flue gas passage is formed, with both ends of the inner spiral tube 302 connected to the cooling water circulation system. The outlet end of the cyclone separator 2 is connected to one end of the outer spiral tube 301 through the exhaust pipe, thus connecting it to the flue gas passage. The other end of the outer spiral tube 301 is connected to the multi-stage absorption tower 6 through a pipe. An air pump 5 for accelerating gas transport efficiency is connected to the pipe between the outer spiral tube 301 and the multi-stage absorption tower 6. The multi-stage absorption tower 6 is an existing nitrile smoke spray absorption tower structure, which includes multi-stage packing and spray structure. An absorbent liquid storage tank is set at the bottom. The spray structure and the absorbent liquid storage tank are connected through a liquid delivery pipe, and a liquid delivery pump is connected to the liquid delivery pipe. Its specific structure is no different from that of the existing multi-stage absorption tower, so it will not be described in more detail in this article.
[0018] The cooling water circulation system can directly adopt the existing cooling water circulation system in the workshop, or a small cooling water circulator 4 can be used. The two ends of the inner spiral tube 302 are connected to the circulation inlet and circulation outlet of the cooling water circulator 4, respectively. To ensure cooling efficiency and effect, the flow direction of the cooling water is opposite to the flow direction of the nitrous smoke, so as to achieve the effect of counter-current cooling.
[0019] The working principle of this embodiment is as follows:
[0020] The generated gunpowder smoke exhaust gas is drawn into the gunpowder smoke compressor 1. The gunpowder smoke exhaust gas is pressurized to 0.15MPa by the gunpowder smoke compressor 1 and enters the cyclone separator 2. After the particulate matter and solid impurities in the gunpowder smoke exhaust gas are separated by the cyclone separator 2, it enters the flue gas channel formed between the inner spiral tube 302 and the outer spiral tube 301. At the same time, the cooling water circulator 4 is started and runs. Cooling water enters the inner spiral tube 302 to cool the gunpowder smoke exhaust gas in the flue gas channel. The cooled gunpowder smoke exhaust gas enters the multi-stage absorption tower 6 and comes into full contact with the absorption liquid to achieve gunpowder smoke absorption.
[0021] Example 2:
[0022] like Figure 1-2 The smoke absorption device shown in this embodiment differs from Embodiment 1 in that a cooling water flow channel is added to achieve simultaneous internal and external cooling of the smoke, further improving the cooling efficiency of the smoke. The end of the cooler 3 aligned with the cooling water inlet of the inner spiral tube 302 is connected to the outlet of the cooling water circulator 4 via a circulation inlet pipe 303, and the end of the cooler 3 aligned with the cooling water outlet of the inner spiral tube 302 is connected to the inlet of the cooling water circulator 4 via a circulation outlet pipe 304. This enables simultaneous internal and external cooling of the smoke, significantly improving the cooling efficiency and effect.
[0023] The difference between the working principle of this embodiment and that of Embodiment 1 is as follows:
[0024] In this embodiment, cooling water simultaneously enters the cooler 3 to achieve simultaneous internal and external cooling of the nitrile exhaust gas in the flue gas duct, thereby improving the cooling effect and efficiency of the nitrile exhaust gas.
Claims
1. A smoke absorption device, comprising a smoke compressor (1) and a multi-stage absorption tower (6), wherein the inlet end of the smoke compressor (1) is connected to each smoke-generating unit via a pipe, characterized in that: The outlet end of the nitrate compressor (1) is connected to the inlet end of the cyclone separator (2) through the air inlet pipe. The outlet end of the cyclone separator (2) is connected to the inlet end of the cooler (3) through the air outlet pipe. An outer spiral tube (301) is fixedly connected inside the cooler (3). An inner spiral tube (302) is fixedly connected inside the outer spiral tube (301). A flue gas channel is formed between the inner spiral tube (302) and the outer spiral tube (301). Both ends of the inner spiral tube (302) are connected to the cooling water circulation system. The air outlet pipe is connected to one end of the outer spiral tube (301). The other end of the outer spiral tube (301) is connected to the multi-stage absorption tower (6) through a pipe.
2. The nitrous oxide absorption device according to claim 1, characterized in that: The cooling water circulation system adopts a cooling water circulator (4), and the two ends of the inner spiral tube (302) are respectively connected to the circulation inlet and circulation outlet of the cooling water circulator (4).
3. The smoke absorbing device of claim 1, wherein: An air pump (5) is connected to the pipeline between the outer spiral tube (301) and the multi-stage absorption tower (6).
4. The smoke absorbing device of claim 2, wherein: One end of the cooler (3) is connected to the outlet end of the cooling water circulator (4) through the circulation inlet pipe (303), and the other end is connected to the inlet end of the cooling water circulator (4) through the circulation outlet pipe (304).