Industrial tail gas treatment system

Abstract

The utility model relates to an industrial tail gas treatment system. A first solid-gas separation device of the industrial tail gas treatment system is configured to filter impurities in tail gas; the cooling device is communicated with the first solid-gas separation device and is configured to cool the tail gas filtered by the first solid-gas separation device so as to remove organic matters in the tail gas; the third solid-gas separation device is communicated with the cooling device and is configured to filter impurities in the tail gas treated by the cooling device, and the mesh number of the impurities filtered by the first solid-gas separation device is smaller than that of the impurities filtered by the third solid-gas separation device; and the driving piece is configured to drive the tail gas to sequentially flow through the first solid-gas separation device, the cooling device and the third solid-gas separation device. The cooling device is used for removing organic matters in industrial tail gas, the number of impurities filtered before cooling is smaller than that of impurities filtered after cooling, the tail gas dust removal effect of materials containing organic matters (liquid wax, paraffin and the like) in industrial application is achieved, and the practical problems that mixed oil gas is difficult to separate and the oil gas is prone to blocking a filter screen are solved.

Description

Technical Field

[0001] The present disclosure relates to the field of tail gas technology, and in particular to an industrial tail gas treatment system. Background Art

[0002] At present, domestic and foreign kerosene plants, refineries, chemical coal and other industries will produce smoke, dust, oil gas and other harmful substances in the process of transportation, refining and purification. These substances will fall on platforms, equipment bottoms, corners and drift in the air. Especially in the field of coal chemical industry, large equipment needs to operate continuously day and night. The platform area is large and the pedestrian operation passage is narrow. The cleaning problems brought about by this are extremely complicated. Moreover, the long-term accumulation of dust in the gaps between equipment will greatly reduce the service life of the equipment. At present, most of the factory areas use manual cleaning methods, which not only increases personnel costs, but also generates certain risks and hazards caused by secondary dust.

[0003] Nowadays, under the advocacy of low-carbon environmental protection and sustainable energy development, exhaust dust removal and oil and gas separation are difficult problems that need to be solved urgently. At present, bag dust collectors are mostly used to filter exhaust gas in industrialization. However, after a period of use, a layer of dust will accumulate on the surface of the filter material due to screening, intermolecular effects, static electricity, etc. After a long period of accumulation, some fine particles will also pass through the filter to reduce the filtering effect. In addition, after long-term dust accumulation, the air volume resistance increases, and the dust removal effect will be significantly reduced. Utility Model Content

[0004] In order to solve the technical problem of filtering industrial tail gas containing organic matter by a bag filter, the present invention provides an industrial tail gas treatment system.

[0005] The industrial tail gas described in the present disclosure contains organic matter, and the industrial tail gas treatment system provided in the present disclosure includes:

[0006] a first solid-gas separation device, the first solid-gas separation device being configured to remove impurities from the industrial tail gas;

[0007] a cooling device, the cooling device being in communication with the first solid-gas separation device and configured to cool the industrial tail gas processed by the first solid-gas separation device to remove organic matter in the industrial tail gas;

[0008] a third solid-gas separation device, the third solid-gas separation device being in communication with the cooling device and configured to filter impurities in the industrial tail gas after being treated by the cooling device, wherein the mesh number of impurities filtered by the first solid-gas separation device is smaller than the mesh number of impurities filtered by the third solid-gas separation device;

[0009] A driving member is configured to drive the industrial tail gas to flow through the first solid-gas separation device, the cooling device and the third solid-gas separation device in sequence.

[0010] In one embodiment, the industrial tail gas treatment system of the present disclosure further includes:

[0011] a detection element configured to detect whether the industrial tail gas treated by the third solid-gas separation device meets the emission standards;

[0012] The incinerator is configured to treat the industrial exhaust gas that does not meet the emission standards at high temperature based on the detection result of the detection element until it meets the emission standards and then discharge it into the atmosphere.

[0013] In one embodiment, the driving member of the present disclosure is an induced draft fan, the induced draft fan is arranged on the downstream side of the third solid-gas separation device, and the detection element is arranged between the third solid-gas separation device and the induced draft fan.

[0014] In one embodiment, the industrial tail gas treatment system further comprises a two-position three-way valve disposed on the downstream side of the induced draft fan, wherein a first valve port of the two-position three-way valve is connected to the induced draft fan, a second valve port is directly connected to the atmosphere, and a third valve port is connected to the incinerator;

[0015] The two-position three-way valve is configured to connect the first valve port and the second valve port and block the third valve port when the detection result of the detection element meets the atmospheric emission standard, and only connect the first valve port and the third valve port and block the second valve port when the detection result of the detection element does not meet the atmospheric emission standard.

[0016] In one embodiment, the industrial tail gas treatment system further comprises:

[0017] a second solid-gas separation device, which is disposed between the first solid-gas separation device and the cooling device and is configured to process the industrial tail gas processed by the first solid-gas separation device and transport it to the cooling device; and,

[0018] The mesh number of impurities filtered by the second solid-gas separation device is smaller than the mesh number of impurities filtered by the third solid-gas separation device, and larger than the mesh number of impurities filtered by the first solid-gas separation device.

[0019] In one embodiment, the first solid-gas separation device and / or the second solid-gas separation device is a cyclone separator.

[0020] In one embodiment, the third solid-gas separation device is a Y-type filter.

[0021] In one embodiment, the industrial tail gas is industrial tail gas generated by a furnace.

[0022] In one embodiment, the cooling temperature of the cooling device is minus 10°C.

[0023] In one embodiment, the second solid-gas separation device filters impurities with a mesh size smaller than 325 meshes and larger than 80 meshes.

[0024] One beneficial effect of the industrial tail gas treatment system disclosed in the present invention is that, compared with the traditional bag dust collector, the tail gas treatment system disclosed in the present invention removes organic matter in the industrial tail gas by using a cooling device, and performs dust removal treatment before and after the cooling device by means of two solid-gas separation devices, and the number of impurities filtered out before cooling is less than the number of impurities filtered out after cooling, forming at least two levels of filtering modes. Thus, the environmental pollution and personal harm caused by the direct discharge of harmful gases in industrialization are solved; at the same time, the phenomenon-level problems such as the bag dust collector widely used in the prior art can only process a single gas and the filter screen is easy to clog are solved, and then the tail gas dust removal effect containing organic matter (liquid wax, paraffin, etc.) materials in industrial applications is achieved, and the practical problems of the difficulty in separating mixed oil and gas and the easy clogging of the filter screen by oil and gas are avoided, and the tail gas treatment efficiency and good effect are achieved.

[0025] In addition, the industrial exhaust gas treatment disclosed in the present invention uses a detection element to detect whether the concentration of each component in the treated exhaust gas meets the emission standards prescribed by the state before discharging the treated exhaust gas into the atmosphere. Based on the detection results, the exhaust gas is selectively discharged directly into the atmosphere or treated at high temperature in an incinerator until it meets the emission standards before being discharged into the atmosphere, thereby further improving the exhaust gas treatment effect, minimizing the content of harmful substances in the exhaust gas, and reducing pollution to the environment.

[0026] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0028] Figure 1 is a structural block diagram of the industrial tail gas treatment system of the present disclosure provided in Example 1;

[0029] Figure 2 is a structural block diagram of the industrial tail gas treatment system of the present disclosure provided in Example 2;

[0030] Figure 3 is a structural block diagram of the industrial tail gas treatment system of the present disclosure provided in Example 3;

[0031] Figure 4 is a structural block diagram of the industrial tail gas treatment system of the present disclosure provided by Example 4;

[0032] Figure 5 This is a statistical chart of the working time of the induced draft fan of the industrial exhaust gas treatment system of the present disclosure provided in Example 3.

[0033] Figures 1 to 4 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0034] 1. The first solid-gas separation device; 2. The second solid-gas separation device; 3. The cooling device; 4. The third solid-gas separation device; 5. The induced draft fan; 6. The detection element; 7. The two-position three-way valve; 8. The incinerator. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0038] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0040] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0041] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0042] As described in the background technology, the existing bag filter has a poor dust removal effect when treating industrial exhaust gas containing organic matter. To this end, the present disclosure provides an exhaust gas treatment system. Figures 1 to 5 , the specific structure and working principle of the exhaust gas treatment system disclosed in the present invention are described in detail in combination with several embodiments.

[0043] It should be noted that the tail gas treatment system disclosed in the present invention can be promoted to scientific research institutions, enterprise R&D centers, coal chemical industry, petrochemical industry and other industries containing organic industrial tail gas treatment units according to user requirements and uses. In particular, it is suitable for treating tail gas containing organic substances such as liquid wax and paraffin discharged from furnaces.

[0044] In addition, it should be noted that Figures 1 to 4 The "straight line with arrows" in the figure represents the flow direction of the exhaust gas. In addition, the directional words "upstream, downstream" are used to describe the relative positional relationship of each component below. The directional words are set based on the flow direction of the exhaust gas. For the same part of the exhaust gas, the area that it flows through first is the upstream, and the area that it flows through later is the downstream.

[0045] Embodiment 1

[0046] See also Figure 1 In this embodiment, the exhaust gas treatment system disclosed in the present invention includes a first solid-gas separation device 1, a cooling device 3, a third solid-gas separation device 4 and a driving member.

[0047] Among them, the first solid-gas separation device 1 is configured to filter impurities in the exhaust gas; the cooling device 3 is connected to the first solid-gas separation device 1, and is configured to cool the exhaust gas filtered by the first solid-gas separation device 1 to remove organic matter in the exhaust gas; the third solid-gas separation device 4 is connected to the cooling device 3, and is configured to filter impurities in the exhaust gas treated by the cooling device 3, and the mesh number of impurities filtered by the first solid-gas separation device 1 is smaller than the mesh number of impurities filtered by the third solid-gas separation device 4; the driving member is configured to drive the exhaust gas to flow through the first solid-gas separation device 1, the cooling device 3 and the third solid-gas separation device 4 in sequence.

[0048] The working process of the above-mentioned exhaust gas treatment system is as follows: the exhaust gas containing organic matter generated by the furnace and other equipment under the driving action of the driving part flows through the first solid-gas separation device 1, the cooling device 3 and the third solid-gas separation device 4 in sequence. In this process, the first solid-gas separation device 1 filters impurities in the exhaust gas, and the solid particles (dust) settle at the bottom of the first solid-gas separation device 1 under their own gravity and the action of the first solid-gas separation device 1. After the oil-gas mixture enters the cooling device 3, the water vapor and part of the organic matter are naturally condensed into liquid in the cooling device 3 and settle at the bottom (part of the dust mixed in the liquid is also cooled down), and the remaining non-condensable steam enters the third solid-gas separation device 4; the non-condensable steam enters the third solid-gas separation device 4 and continues to be separated under the action of the third solid-gas separation device 4, and the dust is blocked in the device, and the treated clean exhaust gas is discharged into the atmosphere.

[0049] Obviously, compared with the traditional bag dust collector, the exhaust gas treatment system disclosed in the present invention utilizes the cooling device 3 to remove organic matter in the industrial exhaust gas, and performs dust removal treatment before and after the cooling device 3 by means of two solid-gas separation devices, and the number of impurities filtered out before cooling is less than the number of impurities filtered out after cooling, forming at least two levels of filtering modes. Thus, the environmental pollution and personal harm caused by the direct discharge of harmful gases in industrialization are solved; at the same time, the phenomenon-level problems such as the bag dust collector widely used in the prior art can only process a single gas and the filter screen is easy to clog are solved, and then the exhaust dust removal effect of materials containing organic matter (liquid wax, paraffin, etc.) in industrial applications is achieved, and the practical problems of the difficulty in separating the mixed oil and gas and the easy clogging of the filter screen by the oil and gas are avoided, and the exhaust gas treatment efficiency and good effect are achieved.

[0050] It should be noted that the mesh size of impurities filtered by the first solid-gas separation device 1 of the present invention is smaller than the mesh size of impurities filtered by the third solid-gas separation device 4, so as to form different levels of filtration capacity before and after exhaust gas cooling, thereby further improving the dust removal capacity of the exhaust gas treatment system. The mesh size of impurities filtered by both depends on the specific components and content of the exhaust gas. People in this field set specific values ​​or value ranges based on actual application scenarios, and this article does not limit it here.

[0051] In detail, in this embodiment, the driving member of the present disclosure is an induced draft fan 5, and the air inlet of the induced draft fan 5 is connected to the air outlet of the third solid-gas separation device 4. That is to say, the induced draft fan 5 is arranged on the downstream side of the third solid-gas separation device 4, and generates negative pressure through the rotation of the impeller, thereby extracting the exhaust gas generated by the industrial equipment such as the furnace on the upstream side of the exhaust gas treatment system.

[0052] In addition, in this embodiment, the first solid-gas separation device 1 of the present disclosure uses a cyclone separator, which is a device used for separation of gas-solid system or liquid-solid system. Its working principle is to rely on the rotational motion caused by the tangential introduction of airflow to make solid particles or liquid droplets with large inertial centrifugal force be thrown to the outer wall and separated. Compared with the traditional bag dust collector, the cyclone separator has the characteristics of good dust removal effect and high efficiency.

[0053] In this embodiment, the third solid-gas separation device 4 of the present disclosure uses a Y-type filter, which has the characteristics of advanced structure, small resistance, convenient sewage discharge, etc. The Y-type filter is applicable to water, oil, and gas.

[0054] In this embodiment, the cooling temperature of the cooling device 3 is preferably minus 10° C., so as to better remove organic matter such as liquid wax and paraffin in the industrial tail gas.

[0055] Embodiment 2

[0056] See also Figure 2In this embodiment, the exhaust gas treatment system disclosed in the present invention includes a first solid-gas separation device 1, a second solid-gas separation device 2, a cooling device 3, a third solid-gas separation device 4 and a driving member.

[0057] Among them, the first solid-gas separation device 1 is configured to filter impurities in the exhaust gas; the second solid-gas separation device 2 is arranged between the first solid-gas separation device 1 and the cooling device 3, and is configured to process the exhaust gas treated by the first solid-gas separation device 1 and transport it to the cooling device 3, the cooling device 3 is configured to cool the exhaust gas filtered by the first solid-gas separation device 1 and the second solid-gas separation device 2 to remove organic matter in the exhaust gas; the third solid-gas separation device 4 is connected to the cooling device 3, and is configured to filter impurities in the exhaust gas treated by the cooling device 3, and the mesh number of impurities filtered by the second solid-gas separation device 2 is smaller than the mesh number of impurities filtered by the third solid-gas separation device 4, and greater than the mesh number of impurities filtered by the first solid-gas separation device 1; the driving member is configured to drive the exhaust gas to flow through the first solid-gas separation device 1, the second solid-gas separation device 2, the cooling device 3 and the third solid-gas separation device 4 in sequence.

[0058] The working process of the exhaust gas treatment system is as follows: the exhaust gas containing organic matter generated by the furnace and other equipment under the driving action of the driving member flows through the first solid-gas separation device 1, the second solid-gas separation device 2, the cooling device 3 and the third solid-gas separation device 4 in sequence. In this process, the first solid-gas separation device 1 filters the impurities in the exhaust gas, that is, the solid particles (dust) smaller than the first preset mesh number settle at the bottom of the first solid-gas separation device 1 under their own gravity and the action of the first solid-gas separation device 1, and the particles (dust) larger than the first preset mesh number and smaller than the second preset mesh number are separated by gas and solid under the second solid-gas separation device 2, and the solid matter settles at the bottom thereof. After the oil-gas mixture enters the cooling device 3, the water vapor and part of the organic matter are naturally condensed into liquid in the cooling device 3 and settle at the bottom (part of the dust mixed in the liquid is also cooled down), and the rest of the non-condensable steam enters the third solid-gas separation device 4; the non-condensable steam enters the third solid-gas separation device 4 and continues to be separated under the action of the third solid-gas separation device 4, and the dust is blocked in the device, and the clean exhaust gas after treatment is discharged into the atmosphere.

[0059] Obviously, compared with Example 1, this embodiment adds a second solid-gas separation device 2 before cooling, forms a two-stage dust removal mode before cooling the exhaust gas, and performs a third-stage dust removal after cooling the exhaust gas, thereby enhancing the overall dust removal capacity of the exhaust gas dust removal system.

[0060] Of course, the second embodiment has all the technical effects of the first embodiment, and those skilled in the art can fully implement and connect them based on the description of the first embodiment, which will not be described in detail herein.

[0061] It should be noted that the first preset number and the second preset number used in this article are introduced to provide different levels of dust removal capabilities in the three-stage dust removal mode. The specific values ​​or value ranges are set by technical personnel in this field based on the needs of actual application scenarios, and are not specifically limited in this article.

[0062] In addition, in this embodiment, the second solid-gas separation device 2 of the present disclosure uses a cyclone separator, which is a device used for separation of gas-solid system or liquid-solid system. Its working principle is to rely on the rotational motion caused by the tangential introduction of airflow to make solid particles or liquid droplets with large inertial centrifugal force be thrown to the outer wall and separated. Compared with the traditional bag dust collector, the cyclone separator has the characteristics of good dust removal effect and high efficiency.

[0063] In this embodiment, the second solid-gas separation device 2 of the present disclosure filters impurities at a mesh size less than 325 meshes and greater than 80 meshes.

[0064] Embodiment 3

[0065] See also Figure 3 In this embodiment, the exhaust gas treatment system disclosed herein includes a first solid-gas separation device 1, a second solid-gas separation device 2, a cooling device 3, a third solid-gas separation device 4, a driving member, a detection element 6 and an incinerator 8.

[0066] The first solid-gas separation device 1 is configured to filter impurities in the tail gas; the second solid-gas separation device 2 is arranged between the first solid-gas separation device 1 and the cooling device 3, and is configured to process the tail gas processed by the first solid-gas separation device 1 and transport it to the cooling device 3, and the cooling device 3 is configured to cool the tail gas filtered by the first solid-gas separation device 1 and the second solid-gas separation device 2 to remove organic matter in the tail gas; the third solid-gas separation device 4 is connected to the cooling device 3, and is configured to filter impurities in the tail gas processed by the cooling device 3, and the second solid-gas separation device 2 filters impurities. The mesh number of the solid-gas separation device is smaller than the mesh number of the impurities filtered by the third solid-gas separation device 4, and larger than the mesh number of the impurities filtered by the first solid-gas separation device 1; the detection element 6 is configured to detect whether the exhaust gas treated by the third solid-gas separation device 4 meets the emission standards; the incinerator 8 is configured to treat the exhaust gas that does not meet the emission standards at high temperature based on the detection result of the detection element 6 to meet the emission standards and then discharge it into the atmosphere; the driving component is configured to drive the exhaust gas to flow through the first solid-gas separation device 1, the second solid-gas separation device 2, the cooling device 3, the third solid-gas separation device 4, the detection element 6 and the incinerator 8 in sequence.

[0067] The working process of the exhaust gas treatment system is as follows: the exhaust gas containing organic matter generated by the furnace and other equipment under the driving action of the driving member flows through the first solid-gas separation device 1, the second solid-gas separation device 2, the cooling device 3 and the third solid-gas separation device 4 in sequence. In this process, the first solid-gas separation device 1 filters the impurities in the exhaust gas, and the solid particles (dust) smaller than the first preset mesh number settle at the bottom of the first solid-gas separation device 1 under the action of its own gravity and the first solid-gas separation device 1. The particles (dust) larger than the first preset mesh number and smaller than the second preset mesh number are separated by gas and solid under the second solid-gas separation device 2, and the solid matter settles at the bottom thereof. After the oil-gas mixture enters the cooling device 3, the water vapor and part of the organic matter are naturally condensed into liquid in the cooling device 3 and settle at the bottom (part of the dust mixed in the liquid is also cooled down), and the rest of the non-condensable steam enters the third solid-gas separation device 4; the non-condensable steam enters the third solid-gas separation device 4 and continues to be separated under the action of the third solid-gas separation device 4, and the dust is blocked in the device.

[0068] The detection element 6 detects whether the exhaust gas treated by the third solid-gas separation device 4 meets the emission standards. If it meets the standards, the exhaust gas is directly discharged into the atmosphere only by the driving component. If it does not meet the standards, the exhaust gas is treated at high temperature by the incinerator 8 so that it meets the emission standards before being discharged into the atmosphere.

[0069] Specifically, the exhaust gas treatment system of the present disclosure further includes a two-position three-way valve 7 arranged on the downstream side of the induced draft fan 5, wherein the first valve port of the two-position three-way valve 7 is connected to the induced draft fan 5, the second valve port is directly connected to the atmosphere, and the third valve port is connected to the incinerator 8.

[0070] The two-position three-way valve 7 is configured to connect the first valve port and the second valve port and block the third valve port when the detection result of the detection element 6 meets the atmospheric emission standard; and to connect the first valve port and the third valve port and block the second valve port when the detection result of the detection element 6 does not meet the atmospheric emission standard.

[0071] Obviously, compared with the second embodiment, this embodiment uses the detection element 6 to detect whether the concentration of each component in the treated exhaust gas meets the emission standards prescribed by the state before discharging the treated exhaust gas into the atmosphere, and then selectively discharges the exhaust gas directly into the atmosphere or treats it at high temperature in the incinerator 8 until it meets the emission standards before discharging it into the atmosphere according to the detection results, thereby further improving the exhaust gas treatment effect, minimizing the content of harmful substances in the exhaust gas to the greatest extent, and reducing pollution to the environment.

[0072] Of course, embodiment 3 has all the technical effects of embodiments 1 and 2, and those skilled in the art can fully implement and connect them based on the description of embodiments 1 and 2, which will not be elaborated herein.

[0073] It should be noted that the specific detection function of the detection element 6 disclosed in the present invention depends on the content and composition of the exhaust gas to be treated, such as a carbon dioxide detector, etc., which is selected by those skilled in the art based on actual needs and is not limited herein.

[0074] Embodiment 4

[0075] See also Figure 4 In this embodiment, the exhaust gas treatment system disclosed in the present invention includes a first solid-gas separation device 1, a cooling device 3, a third solid-gas separation device 4, a driving member, a detection element 6 and an incinerator 8.

[0076] Among them, the first solid-gas separation device 1 is configured to filter impurities in the exhaust gas; the cooling device 3 is configured to cool the exhaust gas filtered by the first solid-gas separation device 1 to remove organic matter in the exhaust gas; the third solid-gas separation device 4 is connected to the cooling device 3, and is configured to filter impurities with a mesh size greater than the mesh size of the impurities filtered by the first solid-gas separation device 1; the detection element 6 is configured to detect whether the exhaust gas treated by the third solid-gas separation device 4 meets the emission standards; the incinerator 8 is configured to treat the exhaust gas that does not meet the emission standards at high temperature based on the detection result of the detection element 6 to meet the emission standards and then discharge it into the atmosphere; the driving member is configured to drive the exhaust gas to flow through the first solid-gas separation device 1, the cooling device 3, the third solid-gas separation device 4, the detection element 6 and the incinerator 8 in sequence.

[0077] The working process of the above-mentioned exhaust gas treatment system is as follows: the exhaust gas containing organic matter generated by the furnace and other equipment under the driving action of the driving member flows through the first solid-gas separation device 1, the cooling device 3 and the third solid-gas separation device 4 in sequence. In this process, the first solid-gas separation device 1 filters impurities in the exhaust gas, and the solid particles (dust) settle at the bottom of the first solid-gas separation device 1 under their own gravity and the action of the first solid-gas separation device 1. After the oil-gas mixture enters the cooling device 3, the water vapor and part of the organic matter are naturally condensed into liquid in the cooling device 3 and settle at the bottom (part of the dust mixed in the liquid is also cooled down), and the remaining non-condensable steam enters the third solid-gas separation device 4; the non-condensable steam enters the third solid-gas separation device 4 and continues to be separated under the action of the third solid-gas separation device 4, and the dust is blocked in the device.

[0078] The detection element 6 detects whether the exhaust gas treated by the third solid-gas separation device 4 meets the emission standards. If it meets the standards, the exhaust gas is directly discharged into the atmosphere only by the driving component. If it does not meet the standards, the exhaust gas is treated at high temperature by the incinerator 8 so that it meets the emission standards before being discharged into the atmosphere.

[0079] Obviously, compared with the first embodiment, before the treated exhaust gas is discharged into the atmosphere, the present embodiment uses the detection element 6 to detect whether the concentration of each component therein meets the emission standards prescribed by the state, and then selectively discharges the exhaust gas directly into the atmosphere or treats it at high temperature in the incinerator 8 until the emission standards are met before being discharged into the atmosphere according to the detection results, thereby further improving the exhaust gas treatment effect, minimizing the content of harmful substances in the exhaust gas to the greatest extent, and reducing pollution to the environment.

[0080] Of course, the fourth embodiment has all the technical effects of the first embodiment, and those skilled in the art can fully implement and connect them based on the description of the first and third embodiments, which will not be described in detail herein.

[0081] For better understanding, the following takes the treatment of industrial exhaust gas generated by a furnace as an example, and describes the effect of treating industrial exhaust gas by the exhaust gas treatment system of Example 2 in combination with actual application scenarios.

[0082] It should be noted that Table 1 shows the sample mass recovered using each component of the exhaust gas treatment system disclosed herein, Table 2 shows GB9078-1996 "Industrial Furnace Air Pollutant Emission Standards", and Table 3 shows a comparison of exhaust gas parameters before and after treatment by the exhaust gas treatment system disclosed herein.

[0083] Table 1

[0084] Serial number equipment Sample 1 (unit: g) Sample 2 (unit: g) Sample 3 (unit: g) 1 The first solid-gas separation device 7.1 13.4 34.2 2 The second solid-gas separation device 15.5 26.7 48.1 3 Cooling device 423.7 486.2 567.4 4 The third solid-gas separation device 0.3 1.1 1.6

[0085] The above data were tested using three different samples, all of which weighed 1500g. A recovery storage tank was set at the tail of the kiln for the remaining solids, and the unrecovered materials entered the tail gas treatment system of the present invention through the tail gas pipeline. It can be clearly seen from the data in Table 1 that a large amount of organic matter and water vapor will be condensed during the cooling stage, while there is almost no dust and organic matter at the end of the third solid-gas separation device.

[0086] Table 2

[0087]

[0088]

[0089] Table 3

[0090]

[0091] It can be seen from the statistical results of Tables 2 and 3 that the gas detection content at the tail of the kiln before treatment by the tail gas treatment system of the present invention seriously exceeds the standard and does not meet the national tail gas emission standard (GB9078-1996) in Table 2. After the tail gas treatment system of the present invention performs graded filtration and removes organic matter by cooling, tail gas detection is also carried out at the tail of the last stage (the third solid-gas separation device). The tail gas concentration value is significantly reduced and is all below 5 mg / m3, reaching the national emission standard and also meeting the tail gas emission standards in some factory areas.

[0092] In addition, by Figure 5 It can be seen that when the induced draft fan 5 is directly connected to the tail of the kiln (without the exhaust gas treatment system disclosed in the present invention), the induced draft fan works for only 0.5 hours, the internal filter is seriously blocked, and the gas meter value does not change.

[0093] When the first solid-gas separation device, the second solid-gas separation device, the cooling device and the third solid-gas separation device of the exhaust gas treatment system disclosed in the present invention are connected between the induced draft fan and the rear part of the furnace, the induced draft fan works for 7 hours and the gas meter value only drops slightly. Then the third solid-gas separation device 4 can be unscrewed and the filter replaced to continue normal operation. The replacement process only takes 15 seconds.

[0094] Obviously, the above practical application scenarios can once again prove that compared with the existing exhaust gas treatment method that only uses bag dust collectors, the exhaust gas treatment system disclosed in the present invention has high dust removal efficiency and good dust removal effect. The dust and liquid wax oil removal rate can reach more than 95%. In addition, the single operation time of the exhaust gas treatment system is extended, the number of frequent filter changes in the dust removal system is reduced, and the labor cost is reduced.

[0095] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the marketplace, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. An industrial tail gas treatment system, characterized in that: The industrial tail gas contains organic matter, and the industrial tail gas treatment system includes: A first solid-gas separation device (1), wherein the first solid-gas separation device (1) is configured to remove impurities from the industrial tail gas; a cooling device (3), the cooling device (3) being in communication with the first solid-gas separation device (1) and being configured to cool the industrial tail gas treated by the first solid-gas separation device (1) so as to remove organic matter in the industrial tail gas; a third solid-gas separation device (4), the third solid-gas separation device (4) being in communication with the cooling device (3) and configured to filter impurities in the industrial tail gas after being treated by the cooling device (3), the mesh number of impurities filtered by the first solid-gas separation device (1) being smaller than the mesh number of impurities filtered by the third solid-gas separation device (4); A driving member, wherein the driving member is configured to drive the industrial tail gas to flow through the first solid-gas separation device (1), the cooling device (3) and the third solid-gas separation device (4) in sequence.

2. The industrial tail gas treatment system according to claim 1, characterized in that: The industrial tail gas treatment system also includes: A detection element (6) configured to detect whether the industrial tail gas treated by the third solid-gas separation device (4) meets the emission standards; An incinerator (8) is configured to treat industrial tail gas that does not meet the emission standards at high temperature based on the detection result of the detection element (6) until it meets the emission standards and then discharge it into the atmosphere.

3. The industrial tail gas treatment system according to claim 2, characterized in that: The driving member is an induced draft fan (5), the induced draft fan (5) is arranged on the downstream side of the third solid-gas separation device (4), and the detection element (6) is arranged between the third solid-gas separation device (4) and the induced draft fan (5).

4. The industrial tail gas treatment system according to claim 3, characterized in that: The industrial tail gas treatment system further comprises a two-position three-way valve (7) arranged at the downstream side of the induced draft fan (5), wherein a first valve port of the two-position three-way valve is connected to the induced draft fan (5), a second valve port is directly connected to the atmosphere, and a third valve port is connected to the incinerator (8); The two-position three-way valve (7) is configured to connect the first valve port and the second valve port and block the third valve port when the detection result of the detection element (6) meets the atmospheric emission standard, and only connect the first valve port and the third valve port and block the second valve port when the detection result of the detection element (6) does not meet the atmospheric emission standard.

5. The industrial tail gas treatment system according to any one of claims 1 to 4, characterized in that: The industrial tail gas treatment system also includes: a second solid-gas separation device (2), the second solid-gas separation device (2) being arranged between the first solid-gas separation device (1) and the cooling device (3), and being configured to process the industrial tail gas processed by the first solid-gas separation device (1) and transport the industrial tail gas to the cooling device (3); and, The mesh number of impurities filtered by the second solid-gas separation device (2) is smaller than the mesh number of impurities filtered by the third solid-gas separation device (4), and larger than the mesh number of impurities filtered by the first solid-gas separation device (1).

6. The industrial tail gas treatment system according to claim 5, characterized in that: The first solid-gas separation device (1) and / or the second solid-gas separation device (2) is a cyclone separator.

7. The industrial tail gas treatment system according to claim 5, characterized in that: The third solid-gas separation device (4) is a Y-type filter.

8. The industrial tail gas treatment system according to claim 5, characterized in that: The industrial tail gas is the industrial tail gas generated by furnaces.

9. The industrial tail gas treatment system according to claim 1, characterized in that: The cooling temperature of the cooling device (3) is minus 10°C.

10. The industrial tail gas treatment system according to claim 5, characterized in that: The second solid-gas separation device (2) filters impurities with a mesh size smaller than 325 meshes and larger than 80 meshes.

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