VOC tail gas purification device
By designing a VOC exhaust gas purification device divided into two purification zones, combined with the design that facilitates the replacement of adsorbents, the problem of VOC exhaust gas purification in the polypropylene production process is solved, and the effect of efficiently reducing VOC concentration and reducing environmental pollution is achieved.
Patent Information
- Application Number
- CN202421660756.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The VOC exhaust gas generated during the polypropylene production process is high, and direct emission into the atmosphere will cause pollution to the environment, and it is difficult to effectively purify the existing technology.
A VOC exhaust gas purification device is designed, and the device is divided into two independent purification areas through the partition plate inside the shell, which is initially and deeply purified, and the adsorbent is easy to replace and clean up through the storage box.
It improves purification efficiency, effectively reduces VOC concentration, reduces environmental pollution, and facilitates replacement of adsorbents to ensure long-term and stable operation of the device.
Smart Images
Figure CN222816549U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of organic synthesis reaction devices, in particular to a VOC tail gas purification device. Background Art
[0002] The World Health Organization (WHO) defines a large class of organic compounds with a boiling point range of 50 to 260°C, a saturated vapor pressure of more than 133.32 Pa at room temperature, and existing in the air in the form of vapor at room temperature as volatile organic compounds (VOCs). VOCs are mainly divided into eight categories based on their structure: aromatic hydrocarbons, aliphatic hydrocarbons, halogenated hydrocarbons, alcohols, aldehydes, ketones, polyol compounds, ethers, phenols, epoxy compounds, esters, acid compounds, amines, nitrile compounds and others. VOCs have many direct hazards to the human body, mainly including odor, sensory, mucosal irritation and other systemic toxicity-induced pathological conditions and genotoxicity and carcinogenicity. In addition, VOCs are also important precursors of O3 and PM 2.5, which can cause environmental problems such as photochemical smog, increased O3 concentration, and increased frequency of haze weather, indirectly affecting human health.
[0003] In the production of polypropylene, the white oil, vaseline and electron donor of the catalyst unit are generally purchased from merchants. Before use, nitrogen is used to remove moisture and impurities in these materials through a nitrogen distributor. The substances produced after impurity removal are collected in a sealed tank. Liquid substances including white oil and impurities will be retained in the sealed tank, and tail gas including nitrogen of hydrocarbons, halogenated hydrocarbons, oxygen hydrocarbons and nitrogen hydrocarbons will be discharged from the top of the sealed tank. According to testing, the VOC content in the tail gas can reach up to 100ppm, and direct discharge into the atmosphere will cause environmental pollution.
[0004] Therefore, how to provide a VOC tail gas purification device is a technical problem that urgently needs to be solved. Utility Model Content
[0005] In view of the shortcomings of the prior art, the utility model provides a VOC tail gas purification device with high purification efficiency and easy replacement of adsorbent. It is not only suitable for polypropylene production environment, but also can be applied to other production environments that need to purify VOC tail gas, and has broad application prospects.
[0006] The utility model provides a VOC tail gas purification device, comprising:
[0007] A shell, inside of which a vertical partition is installed, the partition divides the inside of the shell into a first purification zone and a second purification zone, both of which are provided with adsorbents; the first purification zone is provided with an air inlet, and the second purification zone is provided with an exhaust port; when working, VOC tail gas enters the first purification zone and the second purification zone in turn through the air inlet for purification, and the purified gas is discharged through the exhaust port;
[0008] The storage box is respectively arranged in the first purification area and the second purification area for accommodating the adsorbent; an opening is arranged on one side of the shell, the storage box extends into the shell through the opening and is sealed with the shell, a plurality of gaps are arranged on the bottom plate of the storage box, and the top of the storage box is open.
[0009] This technical solution divides the device into two independent purification areas through a partition plate inside the shell, for preliminary and deep purification respectively, which can improve purification efficiency, effectively reduce VOC concentration, and reduce pollution to the environment; the storage box extends into the shell through an opening on the side of the shell and is sealed with the shell, which is convenient for replacing and cleaning the adsorbent, thereby ensuring long-term and stable operation of the device.
[0010] In some embodiments, the VOC tail gas purification device further includes a filter plate, which is disposed at the bottom of the storage box and separates a liquid collection area below the storage box, and the filter plate is used to filter the condensed liquid into the liquid collection area. The technical solution effectively separates and collects the condensed liquid through the arrangement of the filter plate, and prevents the liquid from accumulating in the adsorbent.
[0011] In some embodiments, a drain pipe for discharging condensed liquid is provided at the bottom of the first purification zone and the second purification zone, and both drain pipes are provided with a liquid drain valve, which is used to control the opening and closing of the drain pipe. The technical solution discharges the condensed liquid regularly through the arrangement of the drain pipe and the liquid drain valve to prevent liquid accumulation inside the device.
[0012] In some embodiments, the filter plate is fixedly connected to the housing. In the technical solution, the filter plate is fixedly connected to the housing, and the storage box is formed into a "drawer"-like structure and placed on the filter plate.
[0013] In some embodiments, the filter plate is fixedly connected to the storage box, and slide rails are provided on the inner wall of the housing and both sides of the partition plate; when replacing the adsorbent, the filter plate is pulled out of the housing together with the storage box and placed inside the housing through the slide rails. This technical solution fixes the filter plate and the storage box as one, and the storage box and the filter plate together form a "drawer"-like structure, and the slide rails are provided to facilitate the sliding of the storage box and the filter plate.
[0014] In some embodiments, the air inlet of the first purification zone is connected to a sealed tank for collecting VOC tail gas; the exhaust port of the second purification zone is directly connected to the atmosphere at one end and connected to a liquid collecting place for collecting condensed liquid at the other end. This technical solution can effectively introduce VOC tail gas into the purification device and collect condensed liquid before discharge, thereby reducing environmental pollution.
[0015] In some embodiments, there is space between the top of the storage box and the top of the shell, and the exhaust port is set at a height not higher than the storage box; when working, VOC tail gas enters the storage box of the first purification area, the space above the storage box, and the storage box of the second purification area in sequence through the air inlet for purification, and the purified gas is discharged through the exhaust port. This technical solution optimizes the gas flow path and improves the purification efficiency by setting the position of the storage box and the exhaust port.
[0016] In some embodiments, the adsorbent includes activated carbon. The technical solution can effectively remove harmful substances in VOC tail gas and improve the purification effect.
[0017] Based on the above scheme, the VOC tail gas purification device in the embodiment of the utility model divides the device into two independent purification areas through the partition plate inside the shell, and performs preliminary and deep purification respectively, which can improve the purification efficiency, effectively reduce the VOC concentration, and reduce pollution to the environment; the storage box extends into the shell through the opening on the side of the shell, and is sealed with the shell, which is convenient for replacing and cleaning the adsorbent, ensuring the long-term stable operation of the device. In summary, the utility model provides a VOC tail gas purification device with high purification efficiency and easy replacement of adsorbents. It is not only suitable for polypropylene production environments, but also can be applied to other production environments that need to purify VOC tail gas, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the VOC tail gas purification device of the utility model;
[0020] Figure 2 It is a schematic structural diagram of another embodiment of the VOC tail gas purification device of the utility model.
[0021] In the figure:
[0022] 1. Shell; 2. Partition plate; 3. Storage box; 4. Filter plate; 5. Liquid drain valve; 6. Sealing tank; 7. Exhaust port; 8. Liquid collecting area; 9. Slide rail. DETAILED DESCRIPTION
[0023] 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. 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.
[0024] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.
[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] like Figure 1-Figure 2 As shown, in one embodiment of the VOC tail gas purification device of the utility model, the VOC tail gas purification device includes a shell 1 and a storage box 3; wherein a vertically arranged partition plate 2 is installed inside the shell 1, and the partition plate 2 divides the inside of the shell 1 into a first purification zone and a second purification zone, and the first purification zone and the second purification zone are both provided with adsorbents; the first purification zone is provided with an air inlet, and the second purification zone is provided with an exhaust port 7; when working, the VOC tail gas enters the first purification zone and the second purification zone in turn through the air inlet for purification, and the purified gas is discharged through the exhaust port 7; the storage boxes 3 are respectively arranged in the first purification zone and the second purification zone for accommodating the adsorbent; one of the side surfaces of the shell 1 is provided with an opening, and the storage box 3 extends into the shell 1 through the opening and is sealed with the shell 1, the bottom plate of the storage box 3 is provided with a plurality of gaps, and the top of the storage box 3 is open.
[0028] In the above-mentioned schematic embodiment, the device is divided into two independent purification areas by the partition plate 2 inside the shell 1, and preliminary and deep purification are performed respectively, which can improve the purification efficiency, effectively reduce the VOC concentration, and reduce the pollution to the environment; the storage box 3 extends into the shell 1 through the opening on the side of the shell 1, and is sealed with the shell 1, which is convenient for replacing and cleaning the adsorbent, and ensures the long-term stable operation of the device. In summary, the utility model provides a VOC tail gas purification device with high purification efficiency and convenient replacement of adsorbents. It is not only suitable for polypropylene production environments, but also can be applied to other production environments that need to purify VOC tail gas, and has broad application prospects.
[0029] In some embodiments, Figure 1 As shown, the VOC tail gas purification device further includes a filter plate 4, which is disposed at the bottom of the storage box 3 and separates a liquid collection area below the storage box 3. The filter plate 4 is used to filter the condensed liquid into the liquid collection area. Through the arrangement of the filter plate 4, the condensed liquid is effectively separated and collected to prevent the liquid from accumulating in the adsorbent, thereby improving the service life and purification efficiency of the adsorbent.
[0030] Furthermore, if Figure 1 As shown, the bottom of the first purification area and the second purification area are both provided with drain pipes for discharging condensed liquid, and both drain pipes are provided with liquid drain valves 5, which are used to control the opening and closing of the drain pipes. Through the arrangement of the drain pipes and the liquid drain valves 5, the condensed liquid is regularly discharged to prevent liquid accumulation inside the device and ensure the normal operation of the device.
[0031] In some embodiments, Figure 1 As shown, the filter plate 4 is fixedly connected to the housing 1. By fixing the filter plate 4 to the housing 1, the storage box 3 forms a "drawer"-like structure and is placed on the filter plate 4, making the replacement of the adsorbent more convenient and quick.
[0032] In some embodiments, Figure 2 As shown, the filter plate 4 is fixedly connected to the storage box 3, and slide rails 9 are provided on the inner wall of the housing 1 and both sides of the partition plate 2; when replacing the adsorbent, the filter plate 4 is pulled out of the housing 1 together with the storage box 3, and is placed inside the housing 1 through the slide rails 9. By fixing the filter plate 4 and the storage box 3 as one, the storage box 3 and the filter plate 4 together form a "drawer"-like structure, and the slide rails 9 are provided to facilitate the sliding of the storage box 3 and the filter plate 4, so that the adsorbent can be replaced more conveniently and quickly.
[0033] In some embodiments, Figure 1As shown, the air inlet of the first purification zone is connected to a sealed tank 6 for collecting VOC tail gas; the exhaust port 7 of the second purification zone is directly connected to the atmosphere at one end and is connected to a liquid collecting place 8 for collecting condensed liquid at the other end. This embodiment can effectively introduce VOC tail gas into the purification device and collect condensed liquid before discharge, thereby reducing environmental pollution.
[0034] In some embodiments, Figure 1 As shown, there is a space between the top of the storage box 3 and the top of the housing 1, and the exhaust port 7 is set at a height not higher than the storage box 3; when working, the VOC tail gas enters the storage box 3 in the first purification area, the space above the storage box 3, and the storage box 3 in the second purification area in sequence through the air inlet for purification, and the purified gas is discharged through the exhaust port 7. By setting the positions of the storage box 3 and the exhaust port 7, the gas flow path is optimized and the purification efficiency is improved.
[0035] In some embodiments, Figure 1 As shown, the adsorbent includes activated carbon. Activated carbon has a strong adsorption capacity and can effectively remove harmful substances in VOC tail gas and improve the purification effect.
[0036] Through the description of multiple embodiments of the VOC tail gas purification device of the utility model, it can be seen that the VOC tail gas purification device of the utility model has at least one or more of the following advantages:
[0037] 1. The VOC tail gas purification device provided by the utility model divides the device into two independent purification areas through the partition plate 2 inside the shell 1, and performs preliminary and deep purification respectively, which can improve the purification efficiency, effectively reduce the VOC concentration, and reduce the pollution to the environment;
[0038] 2. In the VOC tail gas purification device provided by the utility model, the storage box 3 extends into the interior of the shell 1 through the opening on the side of the shell 1 and is sealed with the shell 1, which is convenient for replacing and cleaning the adsorbent and ensuring the long-term stable operation of the device;
[0039] 3. The VOC tail gas purification device provided by the utility model has high purification efficiency and is easy to replace the adsorbent. It is not only suitable for polypropylene production environments, but can also be applied to other production environments that need to purify VOC tail gas, and has broad application prospects.
[0040] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0041] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.
Claims
1. A VOC tail gas purification device, characterized in that: include: A shell, wherein a vertically arranged partition plate is installed inside the shell, wherein the partition plate divides the inside of the shell into a first purification zone and a second purification zone, wherein the first purification zone and the second purification zone are both provided with an adsorbent; the first purification zone is provided with an air inlet, and the second purification zone is provided with an exhaust port; during operation, VOC tail gas enters the first purification zone and the second purification zone in turn through the air inlet for purification, and the purified gas is discharged through the exhaust port; A storage box is respectively arranged in the first purification area and the second purification area, and is used to accommodate the adsorbent; one of the side surfaces of the shell is provided with an opening, and the storage box extends into the shell through the opening and is sealed with the shell, a bottom plate of the storage box is provided with a plurality of gaps, and the top of the storage box is open.
2. The VOC tail gas purification device according to claim 1, characterized in that: It also includes a filter plate, which is arranged at the bottom of the storage box and separates a liquid collection area below the storage box. The filter plate is used to filter the liquid formed by condensation into the liquid collection area.
3. The VOC tail gas purification device according to claim 2, characterized in that: The bottoms of the first purification area and the second purification area are both provided with drain pipes for discharging condensed liquid. Both drain pipes are provided with liquid drain valves, and the liquid drain valves are used to control the opening and closing of the drain pipes.
4. The VOC tail gas purification device according to claim 2, characterized in that: The filter plate is fixedly connected to the shell.
5. The VOC tail gas purification device according to claim 2, characterized in that: The filter plate is fixedly connected to the storage box, and slide rails are provided on the inner wall of the shell and both sides of the partition plate; when replacing the adsorbent, the filter plate is pulled out of the shell together with the storage box and is placed inside the shell through the slide rails.
6. The VOC tail gas purification device according to claim 1, characterized in that: The air inlet of the first purification zone is connected to a sealed tank for collecting VOC tail gas; the exhaust port of the second purification zone is directly connected to the atmosphere at one end and connected to a liquid collecting area for collecting condensed liquid at the other end.
7. The VOC tail gas purification device according to claim 1, characterized in that: A space is left between the top of the storage box and the top of the shell, and the exhaust port is set at a height not higher than the storage box; during operation, VOC tail gas enters the storage box in the first purification area, the space above the storage box, and the storage box in the second purification area in sequence through the air inlet for purification, and the purified gas is discharged through the exhaust port.
8. The VOC tail gas purification device according to claim 1 or 5, characterized in that: The adsorbent includes activated carbon.