Composite process and new filter for simultaneous treatment of dust and VOCs

Abstract

The present disclosure provides a new type of filter for simultaneously treating dust and VOCs. The new type of filter adopts a metal fiber filter material with a VOCs catalytic combustion function and also has a dust filtering function. On this basis, a new process with a composite function is provided. The process includes a flue gas collection device for collecting dust and VOCs gases emitted during the production process; a new type of filter connected downstream of the collection device for purifying dust and VOCs gases in the flue gas; a waste heat recovery device connected downstream of the new filter, the waste heat recovery device recycles the heat in the high-temperature flue gas purified by the new filter; the exhaust device is connected to the waste heat recovery device, and is used to discharge the flue gas treated by the waste heat recovery device. The composite treatment process disclosed in the present disclosure can remove dust and VOCs gases at the same time, and the treatment process is simple, the system is stable and reliable, there is no secondary pollution, and it is efficient and safe.

Description

Technical Field

[0001] The present disclosure relates to the field of environmental protection technology, and in particular to a composite process and a novel filter for simultaneously treating dust and VOCs. Background Art

[0002] Environmental protection and energy conservation and emission reduction are the key tasks at present and for a long time to come, and environmental protection and pollution control of industrial enterprises are the top priorities. In the process of industrial production and fuel combustion, dust particles and various volatile organic compounds (VOCs) are inevitably generated. For example, during high-temperature heating and cooling of organic solvents, a large amount of flue gas containing high-temperature dust particles and volatile organic compounds will be generated. If the high-temperature flue gas is not purified, it will cause serious pollution to the environment and even endanger human health.

[0003] Reference Figure 1 At present, the treatment system for high-temperature flue gas containing both dust and VOCs mainly includes: the high-temperature flue gas first passes through the primary heat exchanger for heat exchange, and then passes through the bag filter to remove the dust in the high-temperature flue gas; then passes through the secondary heat exchanger for heat exchange, and then passes through the activated carbon adsorption and desorption to remove the VOCs gas in the high-temperature flue gas. The entire treatment system treats dust and VOCs gas separately, uses a large number of equipment, and the treatment process is cumbersome, the process is long, and the failure rate is high. In addition, due to the large number of treatment equipment, the resistance of the treatment process is large, the energy consumption is high, and the cost of the enterprise increases. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In response to the above technical problems, the present disclosure provides a composite process and a new filter for simultaneously treating dust and VOCs.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the technical solutions disclosed in the present invention are as follows:

[0008] As one aspect of the present disclosure, a novel filter for simultaneously treating dust and VOCs is provided, comprising:

[0009] A smoke purification box, wherein a storage space is provided inside the smoke purification box;

[0010] A first partition plate is arranged in the storage space of the smoke purification box to divide the storage space into a clean area and a polluted area, and at least one through hole is arranged on the first partition plate;

[0011] An air intake duct is arranged outside the smoke purification box, connected to the side wall of the contaminated area and communicated with the contaminated area;

[0012] An air outlet duct is arranged outside the above-mentioned smoke purification box, connected to the side wall of the above-mentioned clean area and communicated with the above-mentioned clean area; and

[0013] At least one dust filter bag is disposed in the contaminated area, and an opening end of the dust filter bag is located in the through hole to be connected to the first partition plate;

[0014] Wherein, the dust removal filter bag comprises a metal fiber filter bag loaded with a catalyst.

[0015] According to an embodiment of the present disclosure, the catalyst includes a metal with catalytic activity or a metal oxide with catalytic activity.

[0016] According to an embodiment of the present disclosure, a plurality of the through holes are provided, the number of the dust filter bags is the same as the number of the through holes, and the dust filter bags correspond to the through holes one by one.

[0017] According to an embodiment of the present disclosure, it also includes:

[0018] At least one second partition plate is arranged in the above-mentioned accommodating space, one end of the above-mentioned second partition plate is connected to the top wall of the above-mentioned clean area, dividing the above-mentioned clean area into multiple sub-clean areas; the other end of the above-mentioned second partition plate extends to the above-mentioned contaminated area, dividing the multiple dust removal filter bags into multiple filter spaces.

[0019] According to an embodiment of the present disclosure, the above-mentioned air outlet duct is in communication with each of the above-mentioned sub-clean areas;

[0020] A pneumatic valve is arranged between each of the above-mentioned sub-clean areas and the above-mentioned air outlet pipeline.

[0021] According to an embodiment of the present disclosure, it further includes a dust cleaning device, which is arranged in the above-mentioned sub-clean area, and each of the above-mentioned sub-clean areas is provided with at least one group of the above-mentioned dust cleaning devices, and the above-mentioned dust cleaning devices are connected to the side walls of the above-mentioned sub-clean areas;

[0022] The pressure difference monitor is used to monitor the pressure difference in the purified smoke box; the above-mentioned cleaning device cleans the dust accumulated on the surface of the above-mentioned dust removal filter bag according to the above-mentioned pressure difference in the purified smoke box.

[0023] According to an embodiment of the present disclosure, the above-mentioned dust cleaning device includes:

[0024] A compressed air pipeline, the compressed air pipeline is connected to the side wall of the sub-clean area, and one end of the compressed air pipeline passes through the sub-clean area;

[0025] A solenoid valve is arranged at the end of the compressed air pipeline passing through the sub-clean area;

[0026] A compressed air nozzle is disposed at the opening of the dust filter bag, and the compressed air nozzle is connected to the compressed air pipeline.

[0027] According to an embodiment of the present disclosure, the above-mentioned cleaning device also includes: a compressed air collecting pipe, which is arranged outside the above-mentioned purified smoke box, and the above-mentioned compressed air collecting pipe is connected to each of the above-mentioned compressed air pipes.

[0028] According to an embodiment of the present disclosure, it also includes:

[0029] An ash collecting bin, the interior of which is hollow and connected to the bottom of the smoke purification box;

[0030] The baffle is arranged in the contaminated area at an inclined angle according to a preset angle and is connected to the inner wall of the contaminated area.

[0031] As another aspect of the present disclosure, there is provided a composite process for treating flue gas using the novel filter described above, comprising a collection device, a novel filter, a waste heat recovery device and an exhaust device connected in sequence;

[0032] The above-mentioned collection equipment is used to collect dust and VOCs gases emitted during the production process;

[0033] The novel filter is connected to the collection device through a pipeline, and the novel filter is used to remove dust and VOCs gas in the flue gas collected by the collection device;

[0034] The waste heat recovery device is connected to the novel filter through a pipeline to recover the heat of the flue gas treated by the novel filter;

[0035] The exhaust device is connected to the waste heat recovery device through a pipeline, and is used to discharge the flue gas treated by the waste heat recovery device.

[0036] According to an embodiment of the present disclosure, the exhaust equipment includes a variable frequency fan and an exhaust pipe;

[0037] The above process also includes:

[0038] A wind speed measuring device, arranged on the above-mentioned pipeline, for measuring the flow velocity of the smoke in the above-mentioned pipeline;

[0039] The exhaust gas monitoring device is arranged at the outlet end of the exhaust pipe and is used to monitor the content of dust and VOCs in the treated flue gas.

[0040] (III) Beneficial effects

[0041] According to the embodiments of the present disclosure, the high-temperature flue gas is collected by a collection device, and then filtered and cooled by a new filter and waste heat recovery equipment before being discharged directly. There is no need to use a heat exchanger to repeatedly exchange heat for the high-temperature flue gas, and there is no need for activated carbon adsorption and desorption purification, so that the dust and VOCs gas in the high-temperature flue gas can be removed. Therefore, the treatment system of the present disclosure has a simple process flow, a stable and reliable system, no secondary pollution, good pollutant selectivity, high efficiency and safety. In addition, the treatment system provided by the present disclosure reduces the number of equipment, facilitates maintenance, and thus reduces the treatment cost of pollutants in high-temperature flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0043] Figure 1 The flowchart of the flue gas treatment process in the related art is schematically shown.

[0044] Figure 2 A side view of a novel filter according to an embodiment of the present disclosure is schematically shown.

[0045] Figure 3 The figure schematically shows the filtering mechanism of the novel filter according to the embodiment of the present disclosure.

[0046] Figure 4 A cross-sectional view of a novel filter according to another embodiment of the present disclosure is schematically shown.

[0047] Figure 5 A cross-sectional view of a novel filter according to another embodiment of the present disclosure is schematically shown.

[0048] Figure 6 The flowchart of the composite process for simultaneously treating dust and VOCs according to an embodiment of the present disclosure is schematically shown.

[0049] Figure 7 A flow chart of a combined flue gas treatment process according to another embodiment of the present disclosure is schematically shown.

[0050] In the above drawings, the meanings of the reference numerals are as follows:

[0051] 1- Purify smoke box;

[0052] 1.1- Clean area;

[0053] 1.2-Contaminated areas;

[0054] 1.3-Divided into clean areas;

[0055] 1.4- Filter space;

[0056] 1.5-Pneumatic valve;

[0057] 1.6-Baffle;

[0058] 2- first partition plate;

[0059] 2.1-Through hole;

[0060] 3-Intake duct;

[0061] 4- outlet pipe;

[0062] 5-Dust filter bag;

[0063] 6- second partition plate;

[0064] 7-cleaning device;

[0065] 7.1- Compressed air pipeline;

[0066] 7.2-Solenoid valve;

[0067] 7.3- Compressed air nozzle;

[0068] 7.4- Compressed air manifold;

[0069] 8-ash bin;

[0070] 9-Ash discharge valve.

[0071] 10- a metal fiber filter material layer loaded with a catalyst;

[0072] 10.1-Surface dust layer;

[0073] 10.2-Flue gas dust;

[0074] 10.3-VOCs gas;

[0075] 10.4-Contaminated surface;

[0076] 10.5- Clean surface;

[0077] 11- Collection equipment;

[0078] 11.1-Gas hood;

[0079] 12-New filter;

[0080] 13- Waste heat recovery equipment;

[0081] 14- Exhaust equipment;

[0082] 14.1-Variable frequency fan;

[0083] 14.2-Exhaust pipe;

[0084] 15- Wind speed measuring device;

[0085] 16-Exhaust gas monitoring device. DETAILED DESCRIPTION

[0086] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0087] However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0088] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0089] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0090] In the case of using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.). In the case of using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, or C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0091] In the related technologies, the treatment of various types of pollutants is generally completed through a single facility system, so there are the following problems: 1. Each device is independently set up and operated separately, the overall equipment investment is large, and the enterprise cost is increased; 2. The various devices are arranged in series, occupying a large area; 3. The system resistance increases, the number of equipment is large, and the operation and maintenance costs of the whole set of equipment are high; 4. For the treatment of high-temperature flue gas, high-temperature filter bags must be used for dust collector filter bags. Traditional high-temperature filter materials such as polyimide fiber filter materials and polytetrafluoroethylene filter materials (maximum temperature resistance 260°C) need to take cooling measures, such as mixing air and heat exchanger cooling, which increases the system scale and energy consumption. In addition, the inlet temperature of the activated carbon adsorption device is generally lower than 40°C, and it must also be cooled before entering the activated carbon adsorption device, which makes the traditional process complicated and the investment large, which does not conform to the ecological development concept of energy conservation and emission reduction.

[0092] Based on the above situation, the present invention has developed a composite process and a new filter for simultaneously treating dust and VOCs.

[0093] It should be noted that the composite process and novel filter for simultaneously treating dust and VOCs provided by the present disclosure can be used in the coal industry, metallurgical industry, etc., and can also be used in any field other than the coal and metallurgical industries that needs to treat high-temperature dust and VOCs gases. Therefore, the application field of the composite process and novel filter for simultaneously treating dust and VOCs provided by the present disclosure is not limited.

[0094] The embodiments of the present disclosure also provide a novel composite filter for simultaneously treating dust and VOCs. Figure 2 A side view of a novel filter according to an embodiment of the present disclosure is schematically shown.

[0095] It should be noted that Figure 2 The examples shown are merely examples of new filters to which the embodiments of the present disclosure can be applied, in order to help those skilled in the art understand the technical content of the present disclosure, but it does not mean that the embodiments of the present disclosure only include the components shown in the figures.

[0096] like Figure 2 As shown, the novel filter may include: a smoke purification box 1 , a first partition plate 2 , an air inlet duct 3 , an air outlet duct 4 and at least one dust removal filter bag 5 .

[0097] The smoke purification box 1 has a storage space inside.

[0098] According to the embodiment of the present disclosure, the shape of the smoke purification box 1 is not limited. For example, the shape of the smoke purification box 1 can be a rectangular parallelepiped, a cube, or a cylinder.

[0099] The first partition plate 2 is arranged in the accommodating space of the smoke purification box 1 to divide the accommodating space into a clean area 1.1 and a polluted area 1.2. The first partition plate 2 is provided with at least one through hole 2.1.

[0100] According to the embodiment of the present disclosure, the first partition plate 2 can be arranged horizontally, and the four sides of the first partition plate are connected to the inner wall of the purified smoke box 1, the top of the first partition plate 2 is the clean area 1.1, and the bottom is the contaminated area 1.2.

[0101] The air inlet duct 3 is arranged outside the smoke purification box 1, connected to the side wall of the contaminated area 1.2 and communicated with the contaminated area 1.2.

[0102] The air outlet duct 4 is arranged outside the smoke purification box 1, connected to the side wall of the clean area 1.1 and communicated with the clean area 1.1.

[0103] At least one dust filter bag 5 is disposed in the contaminated area 1 . 2 , and an open end of the dust filter bag 5 is located in the through hole 2 . 1 to be connected to the first partition plate 2 .

[0104] The dust removal filter bag 5 may include a metal fiber filter bag loaded with a catalyst.

[0105] According to an embodiment of the present disclosure, the smoke purification box 1 is divided into a clean area 1.1 and a polluted area 1.2 by using a first partition plate 2, and the open end of the dust filter bag 5 is located in the through hole 2.1 of the first partition plate 2, so as to connect the dust filter bag 5 to the first partition plate 2. At this time, the open end of the dust filter bag 5 is located in the clean area 1.1, and the dust filter bag 5 is located in the polluted area 1.2. When the device of the present disclosure is used for flue gas treatment, the flue gas enters the polluted area 1.2 through the air intake pipe 3, and then is filtered by the dust filter bag 5 to remove dust and VOCs, and then enters the clean area 1.1 through the open end of the dust filter bag 5, and then is discharged through the air outlet pipe 4. Therefore, the new filter provided by the present disclosure integrates multiple functions into one, realizes the simultaneous removal of dust and VOCs, has strong environmental protection benefits and economic benefits, and the equipment provided by the present disclosure has a simple structure, convenient operation, low cost, high efficiency and safety.

[0106] Figure 3 The schematic diagram of the filtering mechanism of the novel filter according to the embodiment of the present disclosure is schematically shown.

[0107] like Figure 3As shown, the metal fiber filter material formed by clustering and drawing with the corresponding load of the catalyst component and the corresponding metal material is used according to the different flue gas temperatures and components. When filtering the flue gas, the flue gas enters the clean surface 10.5 after passing through the metal fiber filter material layer 10 loaded with the catalyst from the polluted surface 10.4. The filtering mechanism of the metal fiber filter material layer 10 loaded with the catalyst is that when the flue gas dust 10.2 passes through the metal fiber filter material layer 10 loaded with the catalyst, the surface dust layer 10.1 is quickly formed by the fiber felt surface through screening, interception, collision, and electrostatic action; then the dust in the flue gas is efficiently filtered (surface filtration) through the surface dust layer 10.1. At the same time, under the action of high temperature, the catalyst loaded on the metal fiber filter material layer 10 loaded with the catalyst catalyzes the oxidation reaction of VOCs gas 10.3 to produce CO2 and H2O, thereby removing VOCs gas from the flue gas.

[0108] According to an embodiment of the present disclosure, the catalyst includes a metal having catalytic activity or a metal oxide having catalytic activity.

[0109] According to an embodiment of the present disclosure, the catalyst may be, for example, one or more of iridium oxide, palladium oxide, ruthenium oxide, rhodium oxide, iron oxide, cerium oxide, aluminum oxide, chromium oxide, barium oxide, zinc oxide, lanthanum cobalt oxide, and lanthanum manganese oxide.

[0110] Figure 4 A cross-sectional view of a novel filter according to another embodiment of the present disclosure is schematically shown.

[0111] According to the embodiments of the present disclosure, Figure 4 As shown, there are multiple through holes 2, the number of dust filter bags 5 is the same as the number of through holes 2.1, and the dust filter bags 5 correspond to the through holes 2.1 one by one.

[0112] In one embodiment of the present disclosure, forty-eight through holes 2.1 are provided on the first partition plate 2, and the forty-eight through holes 2.1 are divided into eight groups along the first direction, each group has six through holes, and the six through holes in each group are distributed along a direction perpendicular to the first direction.

[0113] According to the embodiment of the present disclosure, a plurality of through holes 2.1 are provided on the first partition plate 2, and the number of dust filter bags 5 and the through holes 2.1 are the same and correspond one to one, so that the open end of the dust filter bag 5 can be inserted into the through hole 2.1, which facilitates the fixing of the dust filter bag 5 and the first partition plate 2. In addition, the provision of a plurality of dust filter bags 5 helps to improve the efficiency of treating the flue gas.

[0114] According to an embodiment of the present disclosure, the open end of the dust filter bag 5 may be provided with a fixing member (not shown in the figure) for fixing the dust filter bag 5 to the first partition plate 2, for example, it may be a fixing ring.

[0115] Figure 5A cross-sectional view of a smoke filtering device according to another embodiment of the present disclosure is schematically shown.

[0116] According to the embodiments of the present disclosure, Figure 5 As shown, it also includes:

[0117] At least one second partition plate 6 is arranged in the accommodating space, one end of the second partition plate 6 is connected to the top wall of the clean area 1.1, dividing the clean area 1.1 into multiple sub-clean areas 103; the other end of the second partition plate 6 extends to the contaminated area 1.2, dividing multiple dust removal filter bags 5 into multiple filter spaces 1.4.

[0118] According to an embodiment of the present disclosure, the air outlet duct 4 is in communication with each sub-clean area 1.3.

[0119] According to an embodiment of the present disclosure, a pneumatic valve 1.5 is provided between each sub-clean area 1.3 and the air outlet pipe 4.

[0120] According to an embodiment of the present disclosure, the pneumatic valve 1.5 may be a pneumatic butterfly valve.

[0121] In one embodiment of the present disclosure, referring to Figure 4 There are three second partition plates 6, and the three second partition plates 6 are spaced apart along the first direction, that is, the three second partition plates 6 divide the eight groups of through holes 2.1 and the dust filter bag 5 in the first direction into four parts. At the same time, the clean area 1.1 is divided into four sub-clean areas 1.3, and the four sub-clean areas 1.3 are all connected to the outlet pipe 4, and there is a pneumatic valve 1.5 between each sub-clean area 1.3 and the outlet pipe 4.

[0122] According to the embodiment of the present disclosure, the second partition plate 6 separates the plurality of dust filter bags 5 into the plurality of filter spaces 1.4. In actual use, the operator can flexibly select the number of dust filter bags 5 according to the amount of smoke to be processed. For example, when the amount of smoke to be processed is small, the two pneumatic valves 1.5 are closed, and only half of the dust filter bags 5 participate in the smoke treatment work. When the amount of smoke to be processed is large, all the pneumatic valves 1.5 are opened, so that all the dust filter bags 5 participate in the work, so as to facilitate the treatment of smoke of various scales under various working conditions.

[0123] According to an embodiment of the present disclosure, the novel filter further includes:

[0124] The dust cleaning device 7 is arranged in the sub-clean area 1.3. Each sub-clean area 1.3 is provided with at least one group of dust cleaning devices 7. The dust cleaning device 7 is connected to the side wall of the sub-clean area 1.3.

[0125] In one embodiment of the present disclosure, two groups of dust cleaning devices 7 are provided in each sub-clean area 1.3, and six dust removal filter bags 5 in each group in the sub-clean area 1.3 share one group of dust cleaning devices 7.

[0126] According to an embodiment of the present disclosure, the novel filter further includes a pressure difference monitor for monitoring the pressure difference in the purified smoke box, and a dust cleaning device cleans the dust accumulated on the surface of the dust filter bag according to the pressure difference in the purified smoke box.

[0127] According to an embodiment of the present disclosure, based on the pressure difference in the purified smoke box detected by the pressure difference detector, the cleaning device can clean the dust accumulated on the surface of the dust filter bag according to the pressure difference setting value or the time setting value, thereby realizing automatic cleaning.

[0128] According to the embodiment of the present disclosure, the cleaning device 7 removes the dust adhered to the dust filter bag 5 to avoid excessive dust adhering to the surface of the dust filter bag 5, thereby ensuring the efficiency of flue gas treatment; at the same time, the dust on the surface of the dust filter bag 5 is removed in time to avoid the catalyst on the dust filter bag 5 being covered by dust, thereby ensuring the catalytic effect of the catalyst on VOC.

[0129] According to the embodiment of the present disclosure, each sub-clean area 1.3 is separately provided with a cleaning device 7, so as to facilitate the cleaning of the dust filter bag 5 with a single sub-clean area 1.3 as a unit, and realize the dust removal operation while cleaning, thereby improving the dust removal efficiency and the energy saving effect.

[0130] According to the embodiments of the present disclosure, Figure 2 and Figure 5 , the dust cleaning device 7 comprises:

[0131] A compressed air pipeline 7.1, the compressed air pipeline 7.1 is connected to the side wall of the sub-clean area 1.3, and one end of the compressed air pipeline 7.1 passes through the sub-clean area 1.3;

[0132] The solenoid valve 7.2 is arranged at the end of the compressed air pipeline 7.1 passing through the sub-clean area 1.3;

[0133] The compressed air nozzle 7.3 is arranged at the opening of the dust filter bag 5, and the compressed air nozzle 7.3 is connected to the compressed air pipeline 7.1.

[0134] According to an embodiment of the present disclosure, the solenoid valve 7.2 may be a pulse solenoid valve.

[0135] According to an embodiment of the present disclosure, a solenoid valve 7.2 is provided on each compressed air pipeline 7.1 to facilitate control of a single compressed air pipeline 7.1.

[0136] According to an embodiment of the present disclosure, each group of cleaning devices 7 may be provided with six compressed air nozzles 7 . 3 , and the six compressed air nozzles 7 . 3 of each group correspond one-to-one to the six dust removal filter bags 5 corresponding to the group of cleaning devices 7 .

[0137] According to an embodiment of the present disclosure, the dust cleaning device 7 further comprises: a compressed air collecting pipe 7.1, which is arranged outside the purified smoke box 1, and the compressed air collecting pipe is connected to each compressed air pipe 7.1.

[0138] According to an embodiment of the present disclosure, it also includes:

[0139] The ash collecting bin 8 is hollow inside and connected to the bottom of the smoke purification box 1 .

[0140] According to an embodiment of the present disclosure, the inclination angle of the inner wall of the ash collecting bin 8 is greater than 55°.

[0141] According to the embodiment of the present disclosure, after the flue gas enters the contaminated area 1.2 through the air intake duct 3, the flow rate of the flue gas entering the contaminated area 1.2 is reduced because the space of the contaminated area 1.2 is larger than the opening of the air intake duct 3, so that the dust in the flue gas is initially settled in the ash collecting bin 8.

[0142] In one embodiment of the present disclosure, the bottom of the ash collecting bin 8 also includes an ash discharge valve 9, which is always in operation and has a reliable anti-air leakage design to ensure that no ash accumulates in the system.

[0143] According to an embodiment of the present disclosure, it also includes:

[0144] The baffle 1.6 is tilted in the contaminated area 1.2 at a preset angle and connected to the inner wall of the contaminated area 1.2. In the disclosed embodiment, the tilt angle of the baffle can be set to 55-75°. The setting angle of the baffle 1.6 is greater than the sliding angle of the dust in the flue gas. The sliding angle of the dust refers to the angle between the plate and the horizontal plane when the dust is placed on a smooth flat plate and the plate is tilted until the dust begins to slide.

[0145] According to an embodiment of the present disclosure, the baffle 1.6 can be arranged at the connection between the air intake duct 3 and the purified smoke box 1 in the contaminated area 1.2, so that the flue gas entering the contaminated area 1.2 through the air intake duct 3 flows downward under the guidance of the baffle 1.6 and then flows upward for filtration, so as to improve the deposition effect of dust in the flue gas.

[0146] According to an embodiment of the present disclosure, the outer wall of the smoke purification box 1 is covered with a heat-insulating layer.

[0147] According to an embodiment of the present disclosure, the thermal insulation layer may be thermal insulation cotton or fiber felt.

[0148] According to an embodiment of the present disclosure, a protective layer is coated on the outer side of the thermal insulation layer.

[0149] According to an embodiment of the present disclosure, the protective layer may be a protective layer formed of an aluminum plate or a galvanized iron plate.

[0150] According to an embodiment of the present disclosure, the device is used to process high-temperature flue gas and is in a high-temperature state, and a thermal insulation layer is provided thereon to prevent the generation of condensed water.

[0151] According to an embodiment of the present disclosure, the temperature of the high-temperature flue gas may be 260°C, 270°C, 300°C, 400°C, and so on.

[0152] According to the embodiment of the present disclosure, both the air inlet duct 3 and the air outlet duct 4 are provided with a pressure differential gauge (not shown in the figure) to control the pressure difference within a reasonable range to avoid clogging the dust filter bag 5.

[0153] According to an embodiment of the present disclosure, a flue gas treatment process for simultaneously treating dust and VOCs is also provided.

[0154] Figure 6 The flowchart of the composite process for simultaneously treating dust and VOCs according to an embodiment of the present disclosure is schematically shown.

[0155] like Figure 6 As shown, the composite process includes a collecting device 11, a novel filter 12, a waste heat recovery device 13 and an exhaust device 14 which are connected in sequence.

[0156] The collecting device 11 is used to collect dust and VOCs gas emitted during the production process;

[0157] The novel filter 12 is connected to the collecting device 11 through a pipeline, and the novel filter 12 is used to remove dust and VOCs gas in the flue gas collected by the collecting device 11;

[0158] The waste heat recovery device 13 is connected to the novel filter 12 through a pipeline, and is used to recover the heat of the flue gas treated by the novel filter 12;

[0159] The exhaust device 14 is connected to the novel filter 12 through a pipeline, and is used to discharge the smoke processed by the novel filter 12.

[0160] According to the embodiment of the present disclosure, the high-temperature flue gas is collected by the collection device 11, and then directly discharged after being filtered and cooled by the new filter 12 and the waste heat recovery device 13. There is no need to use a heat exchanger to heat the high-temperature flue gas, and there is no need for activated carbon adsorption, so that the dust and VOCs gas in the high-temperature flue gas can be removed. Therefore, the treatment system of the present disclosure has a simple process flow, a stable and reliable system, no secondary pollution, good pollutant selectivity, high efficiency and safety. In addition, the treatment process provided by the present disclosure reduces the number of equipment, facilitates maintenance, and thus reduces the treatment cost of pollutants in high-temperature flue gas.

[0161] According to the embodiments of the present disclosure, the collection equipment can be arranged at different positions according to production needs, and multiple collection equipment at different positions are connected to the novel filter through pipelines. An automatically controllable pipeline valve is arranged on each pipeline, so as to open the pipeline valve of the corresponding collection equipment according to the smoke generation point.

[0162] Figure 7 A composite process flow chart for flue gas treatment according to another embodiment of the present disclosure is schematically shown.

[0163] Reference Figure 7 According to an embodiment of the present disclosure, the collecting device 11 may be, for example, an air collecting hood 11.1.

[0164] According to an embodiment of the present disclosure, the exhaust device 14 includes a variable frequency fan 14.1 and an exhaust chimney 14.2.

[0165] According to an embodiment of the present disclosure, the process further includes:

[0166] The wind speed measuring device 15 is arranged on the pipeline and is used to measure the flow velocity of the smoke in the pipeline;

[0167] The exhaust gas monitoring device 16 is arranged at the outlet end of the exhaust pipe 14.2 and is used to monitor the content of dust and VOCs in the treated flue gas.

[0168] Reference Figure 7 When treating the flue gas, first, after collecting the untreated flue gas through the dust hood 11.1, the flue gas is treated by the new filter 12 to remove the dust and VOCs gas in the flue gas, and then the heat in the flue gas is recovered by the waste heat recovery device 13, and finally the treated flue gas is discharged through the variable frequency fan 14.1 and the exhaust pipe 14.2. During the treatment process, the wind speed measuring device 15, the exhaust gas monitoring device 16 and the variable frequency fan 14.1 cooperate to control the treatment amount of the flue gas, that is, when the exhaust gas monitoring device 16 detects that the dust and VOCs content in the treated flue gas is high, the variable frequency fan 14.1 automatically adjusts the flow rate of the flue gas, thereby increasing the treatment time of the flue gas in the new filter 12 and improving the removal effect of the dust and VOCs in the flue gas.

[0169] According to the embodiments of the present disclosure, an insulation layer is provided on the outer walls of the exhaust equipment, the novel filter, the waste heat recovery device, the exhaust equipment and the pipeline.

[0170] According to an embodiment of the present disclosure, the thermal insulation layer may be thermal insulation cotton or fiber felt.

[0171] According to an embodiment of the present disclosure, the outer side of the thermal insulation layer may be coated with a protective layer.

[0172] According to an embodiment of the present disclosure, the protective layer may be, for example, a protective layer formed of an aluminum plate or a galvanized iron plate.

[0173] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above description is only a specific embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A new composite filter for simultaneously treating dust and VOCs, comprising: A smoke purification box, wherein a storage space is provided inside the smoke purification box; A first partition plate is arranged in the storage space of the smoke purification box to divide the storage space into a clean area and a polluted area, and at least one through hole is arranged on the first partition plate; An air intake duct is arranged outside the smoke purification box, connected to the side wall of the contaminated area and communicated with the contaminated area; An air outlet duct is arranged outside the smoke purification box, connected to the side wall of the clean area and communicated with the clean area; as well as At least one dust filter bag is disposed in the contaminated area, the open end of the dust filter bag is located in the through hole to be connected to the first partition plate; wherein the dust filter bag is a metal fiber filter bag loaded with a catalyst; At least one second partition plate is arranged in the accommodating space, one end of the second partition plate is connected to the top wall of the clean area, and the clean area is divided into a plurality of sub-clean areas; the other end of the second partition plate extends to the contaminated area, and the plurality of dust filter bags are separated into a plurality of filter spaces; The air outlet duct is in communication with each of the sub-clean areas; A pneumatic valve is arranged between each sub-clean area and the air outlet pipe; A baffle is arranged in the contaminated area at an inclined angle according to a preset angle and connected to the inner wall of the contaminated area, wherein the preset angle includes 55° to 75°; Wherein, the baffle is arranged at the connection between the air inlet duct and the smoke purification box in the contaminated area; The air inlet duct is located below the dust removal filter bag.

2. According to the novel composite filter of claim 1, the catalyst comprises a metal with catalytic activity or a metal oxide with catalytic activity.

3. According to the composite novel filter as described in claim 1, there are a plurality of through holes, the number of the dust removal filter bags is the same as the number of the through holes, and the dust removal filter bags correspond to the through holes one by one.

4. The novel composite filter according to claim 1 further comprises: A dust cleaning device is arranged in the sub-clean area, each of the sub-clean areas is provided with at least one group of the dust cleaning device, and the dust cleaning device is connected to the side wall of the sub-clean area; The pressure difference monitor is used to monitor the pressure difference in the purified smoke box; the dust cleaning device cleans the dust accumulated on the surface of the dust filter bag according to the pressure difference in the purified smoke box.

5. According to the novel composite filter of claim 4, the dust cleaning device comprises: A compressed air pipeline, wherein the compressed air pipeline is connected to the side wall of the separate clean area, and one end of the compressed air pipeline passes through the separate clean area; A solenoid valve is arranged at the end of the compressed air pipeline passing through the sub-clean area; A compressed air nozzle is arranged at the opening of the dust filter bag, and the compressed air nozzle is connected to the compressed air pipeline.

6. According to the novel composite filter of claim 5, the cleaning device further comprises: A compressed air collecting pipe is arranged outside the smoke purification box, and the compressed air collecting pipe is connected to each of the compressed air pipes.

7. The novel composite filter according to claim 1 further comprises: The ash collecting bin is hollow inside and connected to the bottom of the smoke purification box.

8. A composite process for treating flue gas using the novel filter as claimed in any one of claims 1 to 7, comprising a collection device, a novel filter, a waste heat recovery device and an exhaust device connected in sequence; The collection equipment is used to collect dust and VOCs gas emitted during the production process; The novel filter is connected to the collection device through a pipeline, and the novel filter is used to remove dust and VOCs gas in the flue gas collected by the collection device; The waste heat recovery device is connected to the novel filter through a pipeline, and is used to recover the heat of the flue gas treated by the novel filter; The exhaust device is connected to the waste heat recovery device through a pipeline, and is used to discharge the flue gas processed by the waste heat recovery device.

9. The process according to claim 8, wherein The exhaust equipment includes a variable frequency fan and an exhaust pipe; The process also includes: A wind speed measuring device, arranged on the pipeline, for measuring the flow velocity of the smoke in the pipeline; The exhaust gas monitoring device is arranged at the outlet end of the exhaust pipe and is used to monitor the content of dust and VOCs in the treated flue gas.

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