Gas-liquid separator assembly of acid mist discharging system in pickling process section

Abstract

The invention relates to the field of metallurgical equipment, and provides a gas-liquid separator assembly of an acid mist discharge system in a pickling process section, which comprises a separator, a trap and a regenerated acid tank, the bent part of the water sinking bend is formed by connecting a u-shaped pipeline and an inverted u-shaped pipeline; the lower outlet of the separator is connected with one end close to the bent part of the submerged elbow; and the other end of the submerged elbow is connected to the top of the regenerated acid tank. The pipeline design is optimized, drainage facilities are added, the risk of pipeline blockage is reduced, the smoothness of the acid mist discharging system is ensured, and the situation that the circulation area of the system is reduced due to accumulation of condensed acid liquor in the pipeline of the acid mist discharging system, and consequently the exhaust efficiency is affected is avoided. And the condensed acid liquid can be recycled, so that the purposes of reducing cost and improving efficiency are achieved, the efficient operation of an exhaust system is ensured, and the requirements of safety and environmental protection are met.

Description

Technical Field

[0001] The present invention relates to the field of metallurgical equipment, and more particularly to a gas-liquid separator assembly for an acid mist exhaust system in a pickling process section. Background Art

[0002] Acid mist is prone to condensation inside the system pipes. This condensation phenomenon mainly occurs because the water vapor in the acid mist turns from a gaseous state to a liquid state when it encounters the relatively cold pipe wall, forming condensed acid liquid. These condensed acid liquids do not always drain smoothly from the system and often accumulate at the uphill sections of the system pipes.

[0003] Over time, the amount of acid liquid accumulating at the uphill sections gradually increases. When the acid mist exhaust system is operating, the inside of the pipe usually maintains a certain negative pressure state to effectively extract and remove the acid mist. However, under the action of this negative pressure, these accumulated acid liquids not only do not drain smoothly but are instead more tightly attached to the pipe wall due to the attraction of the negative pressure and may even form a thick acid liquid film. The presence of this acid liquid film seriously reduces the effective flow area of the pipe, greatly reducing the system's ability to extract and remove acid mist. Especially at the acid tank, due to the reduction of the pipe flow area, the negative pressure often fails to reach the design requirements, resulting in a serious shortage of negative pressure at the acid tank. This insufficient negative pressure makes it impossible to effectively extract and remove the acid mist, causing a large amount of acid mist to accumulate around the acid tank and ultimately resulting in the serious consequence of acid mist overflow at the site. Acid mist overflow not only seriously pollutes the production environment, affects the health of operators, but may also corrode and damage production equipment, reducing production efficiency and product quality. Summary of the Invention

[0004] Based on the above purposes, on the one hand, the present invention provides a gas-liquid separator assembly for an acid mist exhaust system in a pickling process section, comprising: a separator, a water seal bend, and a regenerated acid tank; the bent part of the water seal bend is connected by a U-shaped and an inverted U-shaped pipe; the lower outlet of the separator is connected to one end close to the bent part of the water seal bend; the other end of the water seal bend is connected to the top of the regenerated acid tank.

[0005] In some embodiments, it further includes an acid tank, a heat exchanger, a scrubber, a fan, and a chimney; the acid tank is connected to the inlet of the separator through a pipe; the upper outlet of the separator is connected to the heat exchanger; the outlet of the heat exchanger is connected to the inlet of the scrubber; the outlet of the scrubber is connected to the chimney through the fan.

[0006] In some embodiments, the trap is a corrosion-resistant polypropylene homopolymer pipe.

[0007] In some embodiments, the material of the separator is corrosion-resistant polypropylene homopolymer.

[0008] In some embodiments, the trap is filled with liquid, where the liquid includes water.

[0009] In some embodiments, the separator is divided into a cyclone separation zone, a gravity sedimentation zone, and a filtration zone for separating gas-liquid mixtures.

[0010] In some embodiments, the cyclone separation zone is used to generate a rotating flow field, centrifugally throw the liquid phase in the gas-liquid mixture towards the wall of the separator, and the gas phase in the gas-liquid mixture gathers towards the top of the separator.

[0011] In some embodiments, the gravity sedimentation zone is used to sediment the liquid phase.

[0012] In some embodiments, the filtration zone is a multi-layer staggered filtration layer located in the gravity sedimentation zone.

[0013] In some embodiments, the material of the filtration layer is a porous glass fiber material.

[0014] The present invention has at least the following beneficial technical effects: The present invention provides a gas-liquid separator assembly for an acid mist exhaust system in a pickling process section, and the device includes: A separator, a trap, and a regenerated acid tank; the bent part of the trap is connected by a U-shaped and an inverted U-shaped pipe; the lower outlet of the separator is connected to one end close to the bent part of the trap; the other end of the trap is connected to the top of the regenerated acid tank.

[0015] The present invention optimizes the pipeline design and increases drainage facilities, reduces the risk of pipeline blockage, ensures the smoothness of the acid mist exhaust system, and avoids the reduction of the system flow area due to the accumulation of condensed acid liquid in the pipeline of the acid mist exhaust system, thereby affecting the exhaust efficiency. Moreover, the condensed acid liquid can be recycled and reused, so as to achieve the purpose of cost reduction and efficiency increase, and ensure the efficient operation of the exhaust system, meeting the requirements of safety and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present invention and form a part of the specification, and are used together with the following specific embodiments to explain the present invention, but do not constitute a limitation to the present invention. In the drawings: Figure 1 Shows a structural diagram of a gas-liquid separator assembly for an acid mist exhaust system in a pickling process section according to an embodiment of the present invention; Figure 2Shows the structural diagram of the prior art; Figure 3 Shows the structural diagram of the separator according to the present invention; Wherein, 1. Separator; 2. Siphon; 3. Regenerated acid tank; 4. Acid tank; 5. Heat exchanger; 6. Scrubber; 7. Fan; 8. Chimney. Detailed implementation manners

[0017] The following will describe in detail the specific implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for the purpose of illustration and explanation of the present disclosure, and are not used to limit the present disclosure.

[0018] In addition, the mention of "embodiment" in this article means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present invention. The phrase appears at various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0019] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the technical field to which this application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as in the embodiments of this application.

[0020] The present invention provides a gas-liquid separator assembly for an acid mist exhaust system in an acid pickling process section. Please refer to Figure 1 , including: Separator 1, siphon 2 and regenerated acid tank 3; The bent part of the siphon 2 is connected by a U-shaped and an inverted U-shaped pipe; The lower outlet of the separator 1 is connected to one end close to the bent part of the siphon 2; The other end of the siphon is connected to the top of the regenerated acid tank 3.

[0021] The present invention improves the acid mist exhaust system in the pickling process section. Before the improvement, acid mist would condense in the system pipeline, and the condensed acid liquid would accumulate at the climbing section of the system pipeline. The accumulated acid liquid would gather under the system negative pressure, reducing the pipeline flow area, resulting in insufficient negative pressure at the acid tank and causing acid mist to overflow at the site. The key point of the present invention is to add a gas-liquid separator assembly at the climbing section of the system pipeline. After the improvement, it can ensure the smoothness of the acid mist exhaust system, avoid the reduction of the system flow area caused by the accumulation of condensed acid liquid in the pipeline of the acid mist exhaust system, thereby affecting the exhaust efficiency. Moreover, the condensed acid liquid can be recycled, so as to achieve the purpose of cost reduction and efficiency increase, and ensure the efficient operation of the exhaust system, meeting the requirements of safety and environmental protection.

[0022] Manufacture the gas-liquid separator assembly according to the structure of the present invention, and install the separator 1 in place by using the shutdown and maintenance time of the unit; prepare the separator 1, the water trap 2 and pipe it to connect with the top of the regenerated acid tank 3 to achieve the purpose of recycling; fill the acid drainage water trap of the separator with liquid; put the system into normal use.

[0023] At the climbing section of the system pipeline of the present invention, due to the action of gravity, the condensed acid liquid is likely to accumulate here. The added gas-liquid separator assembly can effectively capture these condensed acid liquids and prevent them from accumulating in the system pipeline. Ensure the smoothness of the acid mist exhaust system, avoid the reduction of the system flow area caused by the accumulation of condensed acid liquid, and thus affect the exhaust efficiency. Optimize the pipeline layout to make the fluid flow in the pipeline smoother and reduce unnecessary resistance and pressure loss.

[0024] The timely separation and recycling of the condensed acid liquid can ensure that the acid mist exhaust system always operates in the best state, thereby improving the exhaust efficiency. The presence of the gas-liquid separator assembly helps to maintain the stability of the internal pressure of the system and avoid pressure fluctuations caused by the accumulation of condensed acid liquid. The stable system pressure helps to improve the operation efficiency and service life of the equipment. The separated condensed acid liquid can be reused after treatment, which not only reduces resource waste but also reduces the risk of environmental pollution.

[0025] In some embodiments, please refer to Figure 2 , and it also includes an acid tank 4, a heat exchanger 5, a scrubber 6, a fan 7 and a chimney 8; The acid tank 4 is connected to the inlet of the separator 1 through a pipeline; The upper outlet of the separator 1 is connected to the heat exchanger 5; The outlet of the heat exchanger 5 is connected to the inlet of the scrubber 6; The outlet of the scrubber 6 is connected to the chimney 8 through the fan 7.

[0026] Acidic waste gas is corrosive to production equipment. The acid mist exhaust system effectively reduces the corrosion of the waste gas on the equipment, extends the service life of the equipment, and reduces the maintenance and replacement costs. By efficiently treating the waste gas, the acid mist exhaust system reduces the amount of wastewater generated, and reduces the wastewater treatment cost and environmental pollution.

[0027] In some embodiments, refer to Figure 1 , the sink bend 2 is a corrosion-resistant polypropylene homopolymer pipe.

[0028] Polypropylene homopolymer PPH, PPH pipes have excellent corrosion resistance and can resist a variety of chemicals, including corrosive media such as strong acids and strong alkalis. This enables PPH pipes to perform well in environments such as the sink bend 2 that need to withstand chemical corrosion, effectively preventing leakage and corrosion problems and extending the service life of the pipes. Compared with metal pipes, PPH pipes have a lower density, so they are lighter in weight and easier to install and transport. This not only reduces the construction cost but also improves the construction efficiency. At the same time, PPH pipes also have good mechanical properties and can withstand a certain amount of pressure and load to ensure the stability and safety of the sink bend.

[0029] In some embodiments, refer to Figure 1 , the material of the separator 1 is corrosion-resistant polypropylene homopolymer.

[0030] Using PPH material can ensure the long-term stable operation of the separator 1 and avoid leakage or damage caused by corrosion.

[0031] In some embodiments, the sink bend 2 is filled with liquid, and the liquid includes water.

[0032] Brine can also be used to increase the density of the liquid in the sink bend 2, the anti-corrosion agent solution neutralizes or slows down the erosion of corrosive substances, or the oil-based liquid isolates the gas.

[0033] Injecting liquid can significantly improve the sealing performance of the sink bend 2, prevent gas or water leakage, ensure the normal operation of the system and extend the service life, and enhance the resistance of the sink bend 2 to corrosive substances. Also, by injecting liquids with different densities, the overall density of the liquid in the sink bend 2 can be adjusted.

[0034] In some embodiments, refer to Figure 3 , the separator 1 is divided into a cyclone separation zone, a gravity sedimentation zone, and a filtration zone for separating gas-liquid mixtures.

[0035] Using the principle of cyclone, the liquid phase in the gas-liquid mixture is separated by centrifugal force. Cyclone separation is efficient and fast and can handle a large amount of gas-liquid mixture.

[0036] With the action of gravity, the liquid phase in the gas-liquid mixture gradually deposits in the settling zone. The gravity settling zone can further remove the remaining tiny liquid phase after cyclone separation, improving the separation efficiency.

[0037] The gas-liquid mixture is finely filtered through the filter layer to remove solid particles and tiny liquid phase therein. The filtration zone can ensure that the purity of the finally discharged gas meets the requirements.

[0038] The separator can simultaneously achieve three functions: cyclone separation, gravity settling, and filtration, thus meeting various gas-liquid separation requirements. Different separation zones can be adjusted and optimized according to actual needs to adapt to different characteristics of gas-liquid mixtures and separation requirements. Integrating the cyclone separation zone, gravity settling zone, and filtration zone in one separator makes the whole equipment structure compact and occupies a small area, which is beneficial to reducing equipment costs, saving space, and facilitating the installation and maintenance of the equipment.

[0039] In some embodiments, refer to Figure 3 , the cyclone separation zone is used to generate a rotating flow field, centrifugally throw the liquid phase in the gas-liquid mixture towards the wall of the separator 1, and the gas phase in the gas-liquid mixture gathers towards the top of the separator 1.

[0040] The cyclone separation zone utilizes the principle of centrifugal force to throw the liquid phase in the gas-liquid mixture towards the wall, thereby achieving effective separation of the liquid phase and the gas phase. The rotating flow field makes the gas-liquid mixture form a vortex-like flow in the separator, enhancing the separation effect. The vortex-like flow not only helps to throw the liquid phase towards the wall but also enables the gas phase to form an upward air flow in the central region, making it easier to discharge from the top. Whether it is a gas-liquid mixture containing large particle liquid phase or a gas-liquid mixture containing tiny liquid phase, the cyclone separation zone can achieve effective separation.

[0041] Multiple cyclones can also be used in series to form a multi-stage separation system. Each stage of cyclone can remove a part of the liquid phase or bubbles in the gas-liquid mixture, thereby improving the overall separation efficiency.

[0042] In some embodiments, the gravity settling zone is used to settle the liquid phase.

[0043] The gravity settling zone utilizes the action of gravity to gradually deposit the liquid phase in the gas-liquid mixture in the settling zone, thereby achieving effective separation of the liquid phase and the gas phase. This separation method is efficient and can achieve a relatively high separation efficiency in a relatively short time, especially suitable for treating gas-liquid mixtures containing larger liquid phases. The structural design of the gravity settling zone is relatively simple and does not require complex mechanical devices or control systems. This reduces the manufacturing cost and maintenance cost of the equipment, while improving the reliability and stability of the equipment.

[0044] The gravity settling zone achieves gas-liquid separation through physical means without additional energy consumption. This helps reduce production costs, meet environmental protection requirements, and reduce environmental pollution. Since no chemical agents or other harmful substances are used during the settling process, the problem of secondary pollution is also avoided.

[0045] It is also possible to combine electric or magnetic field separation technologies to enhance the effect of gravity separation In some embodiments, refer to Figure 3 , the filtering zone is a multi-layer staggered filtering layer located in the gravity settling zone.

[0046] The staggered filtering layers are stacked layer by layer with filtering media of different pore sizes, materials or structures to form a multi-level filtering system. Each layer of filtering media can intercept a certain size of liquid phase, while the smaller liquid phase can penetrate the current layer and be intercepted by the finer filtering media in the next layer. This enables the liquid phase in the mixture to be gradually separated and removed after passing through multiple layers of filtration. Through multi-level filtration, the liquid phase in the mixture can be removed more thoroughly, improving the separation efficiency. Each layer of filtering media can intercept liquid phases of specific sizes, thereby achieving precise separation of liquid phases of different sizes. Due to the synergistic effect of the multi-layer filtering media, the load borne by each layer of filtering media is relatively small, thus extending the service life of the filtering media. It is possible to select appropriate filtering media and the number of layers according to the properties of the mixture and separation requirements to meet different application needs.

[0047] The staggered filtering layers can form a more complex filtering path, increasing the residence time and contact area of the fluid in the filtering zone. This helps the particles and liquid phase in the fluid to come into contact with the filtering layer more fully, improving the filtering effect. At the same time, the multi-layer filtering layers can also play a progressive role, and each layer can further capture the particles that were not intercepted by the previous layer, ensuring the thoroughness of filtration.

[0048] In some embodiments, the material of the filtering layer is porous glass fiber material.

[0049] The material can also be selected from ceramic membranes, metal meshes, and activated carbon.

[0050] The porous glass fiber material has an extremely high specific surface area and a rich pore structure, which enables it to effectively capture and intercept tiny particles and liquid phases in the gas-liquid mixture. Its high-efficiency filtering performance ensures the purity of the finally discharged gas. The glass fiber material itself has excellent corrosion resistance and heat resistance, can withstand the erosion of various chemical substances and the influence of high-temperature environments, and can still maintain good filtering effects and stability under harsh working conditions, extending the service life of the equipment.

[0051] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0052] In addition, it should be noted that, in the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination manners.

[0053] Furthermore, any combination can be made among various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A gas-liquid separator assembly for an acid mist exhaust system in a pickling process section, characterized in that: include, A separator (1), a sinker (2) and a regenerated acid tank (3); The curved portion of the submerged bend (2) is formed by connecting a U-shaped pipe and an inverted U-shaped pipe; The lower outlet of the separator (1) is connected to one end of the curved portion close to the sinking bend (2); The other end of the sinking bend is connected to the top of the regeneration acid tank (3).

2. The gas-liquid separator assembly of the acid mist exhaust system in the pickling process section according to claim 1 is characterized in that: It also includes an acid tank (4), a heat exchanger (5), a washing tower (6), a fan (7) and a chimney (8); The acid tank (4) is connected to the inlet of the separator (1) through a pipeline; The upper outlet of the separator (1) is connected to the heat exchanger (5); The outlet of the heat exchanger (5) is connected to the inlet of the washing tower (6); The outlet of the washing tower (6) is connected to the chimney (8) via the fan (7).

3. The gas-liquid separator assembly of the acid mist exhaust system in the pickling process section according to claim 1 is characterized in that: The sinker bend (2) is a corrosion-resistant polypropylene homopolymer pipe.

4. The gas-liquid separator assembly of the acid mist exhaust system in the pickling process section according to claim 1 is characterized in that: The material of the separator (1) is corrosion-resistant polypropylene homopolymer.

5. The gas-liquid separator assembly of the acid mist exhaust system in the pickling process section according to claim 1 is characterized in that: The sinking bend (2) is filled with liquid, wherein the liquid comprises water.

6. The gas-liquid separator assembly of the acid mist exhaust system in the pickling process section according to claim 1 is characterized in that: The separator (1) is divided into a cyclone separation zone, a gravity sedimentation zone and a filtration zone, and is used to separate a gas-liquid mixture.

7. The gas-liquid separator assembly of the acid mist exhaust system in the pickling process section according to claim 6 is characterized in that: The cyclone separation zone is used to generate a rotating flow field, centrifugally flinging the liquid phase in the gas-liquid mixture toward the wall of the separator (1), and the gas phase in the gas-liquid mixture gathers toward the top of the separator (1).

8. The gas-liquid separator assembly of the acid mist exhaust system in the pickling process section according to claim 6 is characterized in that: The gravity settling zone is used to settle the liquid phase.

9. The gas-liquid separator assembly of the acid mist exhaust system in the pickling process section according to claim 6, characterized in that: The filtration area is a plurality of staggered filtration layers, which are located in the gravity sedimentation area.

10. The gas-liquid separator assembly of the acid mist exhaust system in the pickling process section according to claim 9, characterized in that: The filter layer is made of porous glass fiber material.

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