Comprehensive waste gas treatment system for clean briquette production line
Through the combination of cyclone dust collector, bag dust collector and reactor, combined with high-speed rotating filter cartridge and chemical reactor, the problem of easy blockage of filter and bags in the waste gas treatment of clean coal production lines is solved, and efficient and thorough exhaust gas purification is achieved to ensure that emissions meet standards.
Patent Information
- Application Number
- CN202422986091.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-12-04
AI Technical Summary
In the waste gas treatment of clean coal production lines, the filter mesh and cloth bags are prone to clogging, the treatment efficiency is low, and the chemical reaction is insufficient, resulting in the waste gas still containing a large amount of harmful substances, affecting the environment.
The cyclone dust collector, bag dust collector and reactor combination is used to rotate the filter cartridge at high speed to separate the dust, combine the chemical reactor for multiple droplet mixing, increase the reaction time and contact area, use the filter between the cyclone dust collector and bag dust collector to prevent clogging, set up scrapers and brushes to clean the filter cartridge, and use a gas detector to ensure that emissions meet standards.
Effectively prevent the filter and bags from being blocked, improve treatment efficiency, significantly reduce dust content, thoroughly remove sulfur dioxide and nitrogen oxides, ensure that waste gas meets the standards for emissions, and reduce environmental pollution.
Smart Images
Figure CN223170608U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste gas treatment, and particularly relates to a comprehensive waste gas disposal system for a clean briquette production line. Background Art
[0002] In the production process of clean briquettes, generally qualified raw coal is purchased from a coal preparation plant. The raw coal is successively crushed, screened, and metered, and then stirred and kneaded with asphalt, tar, additives, etc. After kneading, it is heated and insulated. After heating and insulation, it is subjected to forming treatment to obtain semi-finished briquettes. The semi-finished briquettes enter a carbonization furnace for carbonization, and finally, after coke quenching treatment, finished briquettes are obtained. During the entire production process of briquettes, waste gas is generated during each process such as crushing, screening, stirring and kneading, and carbonization. These waste gases contain pollutants such as dust, particulate matter, sulfur dioxide, benzo[a]pyrene, benzene, phenols, hydrogen sulfide, ammonia, nitrogen oxides, and hydrogen cyanide. In order to meet the national emission standards and avoid environmental pollution, the waste gas must be treated before being discharged.
[0003] Currently, there are often the following problems in the process of treating the waste gas discharged from a clean briquette production line: First, since the waste gas contains a large amount of dust and particulate matter, filters and cloth bags are used to filter the dust, but the filters and cloth bags will be blocked by dust in a very short time, requiring staff to clean and replace them frequently. When cleaning and replacing, the treatment of waste gas needs to be stopped, affecting the normal treatment of waste gas and reducing the treatment efficiency of waste gas. Second, when using a spraying device for waste gas disposal, since these devices often have a single structure, and since it takes a certain amount of time for the waste gas to react with the solution, some harmful substances are discharged before they have time to react, resulting in a large amount of harmful substances still remaining in the discharged waste gas, and there is a problem that the waste gas treatment effect fails to meet the expectations, causing greater pollution to the environment. Therefore, it is objectively necessary to develop a comprehensive waste gas disposal system for a clean briquette production line that is not easily blocked, has high treatment efficiency, and good treatment effect. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a comprehensive waste gas disposal system for a clean briquette production line that is not easily blocked, has high treatment efficiency, and good treatment effect.
[0005] The purpose of the present utility model is achieved as follows. It includes a cyclone dust collector, a bag dust collector, and a reactor. A filter is provided between the cyclone dust collector and the bag dust collector. A filter cartridge with a sealing structure at both the upper and lower ends is vertically arranged inside the filter. A driving mechanism for driving the filter cartridge to rotate is provided at the bottom of the filter. An air outlet pipe extending to the outside of the filter is provided at the top of the filter cartridge. The air inlet on the side wall of the filter cartridge is communicated with the air outlet of the cyclone dust collector. The internal space of the reactor is sequentially divided into a liquid inlet chamber, an air inlet chamber, and a reaction chamber from the outside to the inside by two concentrically arranged isolation cylinders. The air inlet chamber is communicated with the air outlet of the bag dust collector. A number of horizontal pipes communicating the liquid inlet chamber and the reaction chamber are evenly distributed in the air inlet chamber. A spiral guide plate is arranged inside the horizontal pipes. An air inlet hole is provided at the top of the horizontal pipe near the liquid inlet chamber. A vertical cylinder is arranged in the reaction chamber. The lower end of the vertical cylinder is suspended. An exhaust pipe is provided at the top of the reactor inside the vertical cylinder.
[0006] Further, a dehumidifier and an activated carbon filter layer are sequentially arranged in the vertical cylinder from bottom to top.
[0007] Further, a brush is provided on the side wall of the filter. The brush surface of the brush contacts the side wall of the filter cartridge.
[0008] Further, a scraper is provided at the bottom inside the filter. The lower side surface of the scraper contacts the bottom of the filter. The scraper is connected to the output shaft of the driving mechanism. A rectangular ash discharge pipe is provided at the bottom of the filter. A gate valve is provided on the rectangular ash discharge pipe.
[0009] Further, a gas detector and a reflux pipe are sequentially arranged on the exhaust pipe along the gas flow direction. The end of the reflux pipe is communicated with the air inlet chamber.
[0010] Further, the cross-sectional area inside the horizontal pipe gradually decreases in the direction from the liquid inlet chamber to the reaction chamber.
[0011] Further, a baffle cylinder is concentrically arranged in the reaction chamber outside the vertical cylinder. The lower end of the baffle cylinder is fixedly connected to the bottom of the reactor, and a flow passage is left between the upper end and the top of the reactor.
[0012] When the utility model operates, the waste gas generated by the clean coal production line first enters a cyclone dust collector to remove particulate impurities such as large particulate dust in the waste gas, and then enters a filter. After being filtered by the filter cartridge, it enters the interior of the filter cartridge. At the same time, the filter cartridge rotates at a high speed driven by a driving mechanism. The dust separated from the waste gas is thrown out by the filter cartridge under the action of centrifugal force and its own gravity. Subsequently, a bag dust collector further filters particulate impurities such as dust in the waste gas to obtain waste gas substantially free of particulate impurities such as dust. Then, the waste gas is introduced into the intake chamber of the reactor. At the same time, the prepared treatment liquid is introduced into the liquid inlet chamber. Under the action of pressure, the treatment liquid and the waste gas enter the horizontal pipe simultaneously. Under the action of the spiral guide plate, the treatment liquid and the waste gas form a swirl and are continuously mixed for a preliminary reaction. Subsequently, they are sprayed into the reaction chamber from the end of the horizontal pipe to form smaller droplets, which enter the vertical cylinder from the lower end of the vertical cylinder after a baffle flow. The treatment liquid and the waste gas further react to remove harmful pollutants such as sulfur dioxide and nitrogen oxides in the waste gas through a chemical reaction method. Finally, the waste gas meeting the emission requirements is discharged from the exhaust pipe. In the utility model, a filter is arranged between the cyclone dust collector and the bag dust collector. The filter cartridge in the filter is in a high-speed rotation state, and it is relatively convenient to throw out the dust separated from the waste gas. The filter cartridge is not easily blocked. At the same time, a filter is arranged in front of the bag dust collector, greatly reducing the content of particulate matter such as dust in the waste gas, thereby reducing the dust removal load of the bag dust collector. The bag is not easily blocked either, effectively extending the service life of the bag and no longer requiring frequent cleaning and replacement, thus avoiding the problem of stopping waste gas treatment due to maintenance and improving the waste gas treatment efficiency. Secondly, a reactor is arranged to remove harmful pollutants such as sulfur dioxide and nitrogen oxides in the waste gas through a chemical reaction method. The waste gas and the treatment liquid are first preliminarily mixed and contacted in the horizontal pipe, and then form droplets when sprayed out from the horizontal pipe. The obtained droplets are smaller in volume, larger in quantity, and evenly distributed. Coupled with the arrangement of the vertical cylinder causing the droplets to have a baffle flow, generally speaking, the above structure increases the flow path of the droplets formed by the waste gas and the treatment liquid in the reaction chamber, extending the reaction time of the two. Coupled with the uniform distribution of the waste gas and the treatment liquid, it can better remove pollutants such as sulfur dioxide and nitrogen oxides in the waste gas, having a good treatment effect. The waste gas discharged after treatment meets the emission requirements, achieving the expected treatment effect and reducing the degree of environmental pollution. To sum up, the utility model has the advantages of not being easily blocked, high treatment efficiency, and good treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 is a schematic diagram of the structure of the reactor 3 in the utility model;
[0015] Figure 3This is a schematic structural diagram of the scraper 18 in the present utility model;
[0016] In the figure: 1 - cyclone dust collector, 2 - bag dust collector, 3 - reactor, 4 - filter, 5 - filter cartridge, 6 - drive mechanism, 7 - isolation cylinder, 8 - liquid inlet chamber, 9 - air inlet chamber, 10 - reaction chamber, 11 - horizontal pipe, 12 - spiral guide plate, 13 - vertical cylinder, 14 - exhaust pipe, 15 - dehumidifier, 16 - activated carbon filter layer, 17 - brush, 18 - scraper, 19 - rectangular ash discharge pipe, 20 - gas detector, 21 - reflux pipe, 22 - baffle cylinder. Specific embodiments
[0017] The present utility model will be further described below with reference to the accompanying drawings, but it is not limited to the present utility model in any way. Any change or improvement based on the present utility model falls within the protection scope of the present utility model.
[0018] As Figures 1 to 3As shown in the figure, the utility model includes a cyclone dust collector 1, a bag filter 2 and a reactor 3. A filter 4 is arranged between the cyclone dust collector 1 and the bag filter 2. A filter cartridge 5 with a plugging structure at both the upper and lower ends is vertically arranged in the filter 4. The filter cartridge 5 is provided with filter holes for filtering particulate impurities such as dust in the waste gas. A driving mechanism 6 for driving the rotation of the filter cartridge 5 is arranged at the bottom of the filter 4. The driving mechanism 6 can use a combined structure of a motor and a gearbox to drive the rotation of the filter cartridge 5. An air outlet pipe extending to the outside of the filter 4 is arranged at the top of the filter cartridge 5. In the utility model, in order to enable the air outlet pipe to rotate and prevent the waste gas from escaping from the gap between the air outlet pipe and the top of the filter 4, a sealed movable connection structure is adopted between the air outlet pipe and the top of the filter 4, and a sealed bearing can be used. The air inlet on the side wall of the filter cartridge 5 is communicated with the air outlet of the cyclone dust collector 1. The internal space of the reactor 3 is sequentially divided into a liquid inlet chamber 8, an air inlet chamber 9 and a reaction chamber 10 from the outside to the inside by two concentrically arranged isolation cylinders 7. The liquid inlet chamber 8 is used for filling the treatment liquid. The treatment liquid is a prior art and is prepared according to parameters such as the types and contents of pollutants such as sulfur dioxide and nitrogen oxides in the waste gas, so that the treatment liquid can fully react with various pollutants in the waste gas, and then the purpose of purifying the waste gas can be achieved. In the actual treatment process of the waste gas, multiple reactors 3 can be set. For different pollutants in each reactor 3, the treatment liquid is formulated with emphasis and pertinently to remove various pollutants respectively. Generally speaking, it is sufficient to fully remove various pollutants in the waste gas. The air inlet chamber 9 is communicated with the air outlet of the bag filter 2. A plurality of horizontal pipes 11 communicating the liquid inlet chamber 8 and the reaction chamber 10 are evenly distributed in the air inlet chamber 9. A spiral guide plate 12 is arranged in the horizontal pipe 11. An air inlet hole is arranged at the top of the horizontal pipe 11 near the liquid inlet chamber 8. The waste gas in the air inlet chamber 9 enters the horizontal pipe 11 through the air inlet hole. A vertical cylinder 13 with a suspended lower end is fixed at the top in the reaction chamber 10. An exhaust pipe 14 is arranged at the top of the reactor 3 in the vertical cylinder 13.
[0019] When the utility model operates, the waste gas generated by the clean-type coal production line first enters the cyclone dust collector 1 to remove particulate impurities such as large particulate dust in the waste gas, and then enters the filter 4. After being filtered through the filter holes of the filter cartridge 5, it enters the interior of the filter cartridge 5. At the same time, the filter cartridge 5 rotates at a high speed driven by the driving mechanism 6. The dust separated from the waste gas is thrown out by the filter cartridge 5 under the action of centrifugal force and its own gravity. Subsequently, the bag dust collector 2 further filters the particulate impurities such as dust in the waste gas to obtain waste gas basically free of particulate impurities such as dust. Then, the waste gas is introduced into the intake chamber 9 of the reactor 3. At the same time, the prepared treatment liquid is introduced into the liquid inlet chamber 8. Under the action of pressure, the treatment liquid and the waste gas enter the horizontal pipe 11 at the same time. Under the action of the spiral guide plate 12, the treatment liquid and the waste gas form a swirling flow and are continuously mixed for a preliminary reaction. Subsequently, it is sprayed into the reaction chamber 10 from the end of the horizontal pipe 11 to form smaller droplets, which enter the vertical cylinder 13 from the lower end of the vertical cylinder 13 after a baffle flow. The treatment liquid and the waste gas further react to remove harmful pollutants such as sulfur dioxide and nitrogen oxides in the waste gas through a chemical reaction method. Finally, the waste gas meeting the emission requirements is discharged from the exhaust pipe. In the utility model, a filter 4 is arranged between the cyclone dust collector 1 and the bag dust collector 2. The filter cartridge 5 in the filter 4 is in a high-speed rotation state, and the dust separated from the waste gas can be conveniently thrown out. The filter cartridge 5 is not easily blocked. At the same time, a filter 4 is arranged in front of the bag dust collector 2, which greatly reduces the content of particulate matters such as dust in the waste gas, thereby reducing the dust removal load of the bag dust collector 2. The bag is not easily blocked, and the service life of the bag can be effectively extended. It is no longer necessary to clean and replace it frequently, thus avoiding the problem of stopping waste gas treatment due to maintenance and improving the waste gas treatment efficiency. Secondly, a reactor 3 is arranged to remove harmful pollutants such as sulfur dioxide and nitrogen oxides in the waste gas through a chemical reaction method. The waste gas and the treatment liquid are first preliminarily mixed and contacted in the horizontal pipe 11, and then sprayed out from the horizontal pipe 11 to form droplets. The obtained droplets are small in volume, large in number, and evenly distributed. Coupled with the arrangement of the vertical cylinder 13, the droplets are baffled. Generally speaking, the above structure increases the flow path of the droplets formed by the waste gas and the treatment liquid in the reaction chamber 10, extends the reaction time of the two, and the waste gas and the treatment liquid are evenly distributed, which can better remove pollutants such as sulfur dioxide and nitrogen oxides in the waste gas, has a good treatment effect, the waste gas discharged after treatment meets the emission requirements, can achieve the expected treatment effect, and reduces the degree of environmental pollution.
[0020] A dehumidifier 15 and an activated carbon filter layer 16 are sequentially arranged in the vertical cylinder 13 from bottom to top. The dehumidifier 15 and the activated carbon filter layer 16 are both prior arts. The dehumidifier 15 therein is used to remove the moisture in the waste gas and reduce the humidity of the waste gas, and the activated carbon filter layer 16 is used to adsorb the odor, organic pollutants, etc. in the waste gas to further purify the waste gas and improve the purification effect of the waste gas.
[0021] A brush 17 is provided on the side wall of the filter 4, and the brushing surface of the brush 17 contacts the side wall of the filter cartridge 5. Considering that with the extension of the service time, there will always be a part of the particles that stubbornly adhere to the surface of the filter cartridge 5, are difficult to be shaken off, and will accumulate more and more, reducing the effective filtration area of the filter cartridge 5, and further reducing the waste gas treatment efficiency. To solve this problem, the brush 17 is provided to brush off the stubborn dust and particles to ensure that the filter cartridge 5 can maintain a high filtration efficiency for a long time.
[0022] The waste gas enters the filter 4, is filtered by the filter cartridge 5 and then discharged. The dust and other particulate impurities separated by the filter cartridge 5 will fall to the bottom of the filter 4 and accumulate continuously. To avoid the accumulation of dust and discharge the accumulated ash in time, a scraper 18 is provided at the bottom inside the filter 4. The lower side of the scraper 18 contacts the bottom of the filter 4. The scraper 18 is connected to the output shaft of the driving mechanism 6. A rectangular ash discharge pipe 19 is arranged along the radial direction of the bottom of the filter 4, and a gate valve is provided on the rectangular ash discharge pipe 19. During operation, the scraper 18 rotates driven by the driving mechanism 6, and pushes the accumulated ash to move during the rotation process. When it rotates to the position of the rectangular ash discharge pipe 19, the accumulated ash falls into the rectangular ash discharge pipe 19 and is discharged from the filter 4. In the actual use process, the length of the rectangular ash discharge pipe 19 can be appropriately increased to expand the internal space of the rectangular ash discharge pipe 19 as a container for temporarily storing the accumulated ash. When the accumulated ash in the rectangular ash discharge pipe 19 reaches a certain level, the gate valve is opened to discharge it completely.
[0023] A gas detector 20 and a reflux pipe 21 are sequentially arranged on the exhaust pipe 14 along the gas flow direction. The end of the reflux pipe 21 communicates with the intake cavity 9. The gas detector 20 is an existing instrument and is used to detect the content of pollutants such as sulfur dioxide and nitrogen oxides in the waste gas. When the detection result is qualified and meets the emission requirements, the waste gas is discharged for treatment. On the contrary, when the detection result is unqualified and the content of pollutants such as sulfur dioxide and nitrogen oxides in the waste gas still exceeds the standard, the waste gas is returned to the reactor 3 through the reflux pipe 21 to continue the secondary reaction to further remove the pollutants such as sulfur dioxide and nitrogen oxides in the waste gas until the waste gas meets the emission requirements.
[0024] The cross-sectional area inside the horizontal pipe 11 gradually becomes smaller along the direction from the liquid inlet cavity 8 to the reaction cavity 10. The treatment liquid and the waste gas flow in the horizontal pipe 11. As the cross-sectional area of the horizontal pipe 11 gradually becomes smaller, its flow rate gradually increases. Therefore, when spraying out from the end of the horizontal pipe 11, it has a greater impact force, and the treatment liquid can be dispersed into smaller and more droplets, thereby increasing the contact area between the treatment liquid and the waste gas to improve the reaction efficiency of pollutants such as sulfur dioxide and nitrogen oxides in the waste gas.
[0025] A baffle cylinder 22 is concentrically arranged in the reaction chamber 10 outside the vertical cylinder 13. The lower end of the baffle cylinder 22 is fixedly connected to the bottom of the reactor 3, and there is a flow-through channel between the upper end and the top of the reactor 3. When the air flow is ejected from the horizontal pipe 11, it is blocked by the baffle cylinder 22, and the air flow flows upward, then flows into the annular space between the baffle cylinder 22 and the vertical cylinder 13 through the flow-through channel, turns back again after reaching the bottom and enters the interior of the vertical cylinder 13, continuously rises and finally is discharged from the exhaust pipe 14. During the above process, the air flow will turn back multiple times, which not only prolongs the contact time between the waste gas and the droplets, but also increases the flow path length of the air flow, thereby enabling pollutants such as sulfur dioxide and nitrogen oxides in the waste gas to fully react with the treatment liquid, improving the treatment efficiency and treatment effect of the waste gas.
Claims
1. A comprehensive waste gas treatment system for a clean coal production line, comprising a cyclone dust collector (1), a bag filter (2) and a reactor (3), characterized in that : A filter (4) is arranged between the cyclone dust collector (1) and the bag filter (2). A filter cartridge (5) with a sealing structure at both the upper and lower ends is vertically arranged inside the filter (4). A driving mechanism (6) for driving the filter cartridge (5) to rotate is arranged at the bottom of the filter (4). An air outlet pipe extending to the outside of the filter (4) is arranged at the top of the filter cartridge (5). The air inlet on the side wall of the filter cartridge (5) is communicated with the air outlet of the cyclone dust collector (1). The internal space of the reactor (3) is sequentially divided into a liquid inlet chamber (8), an air inlet chamber (9), and a reaction chamber (10) from outside to inside by two concentrically arranged isolation cylinders (7). The air inlet chamber (9) is communicated with the air outlet of the bag filter (2). A plurality of horizontal pipes (11) connecting the liquid inlet chamber (8) and the reaction chamber (10) are evenly distributed in the air inlet chamber (9). A spiral guide plate (12) is arranged inside the horizontal pipe (11). An air inlet hole is arranged at the top of the horizontal pipe (11) close to the liquid inlet chamber (8). A vertical cylinder (13) with a suspended lower end is fixed at the top inside the reaction chamber (10). An exhaust pipe (14) is arranged at the top of the reactor (3) inside the vertical cylinder (13).
2. The integrated waste gas treatment system for a clean coal production line according to claim 1, characterized in that : A dehumidifier (15) and an activated carbon filter layer (16) are sequentially arranged in the vertical cylinder (13) from bottom to top.
3. The integrated waste gas treatment system for a clean coal production line according to claim 1, wherein : A brush (17) is arranged on the side wall of the filter (4), and the brushing surface of the brush (17) contacts the side wall of the filter cartridge (5).
4. The integrated waste gas treatment system for a clean coal production line according to claim 1, wherein : A scraper (18) is arranged at the bottom inside the filter (4). The lower side surface of the scraper (18) contacts the bottom of the filter (4). The scraper (18) is connected to the output shaft of the driving mechanism (6). A rectangular ash discharge pipe (19) is arranged along the radial direction of the bottom of the filter (4), and a gate valve is arranged on the rectangular ash discharge pipe (19).
5. The comprehensive waste gas treatment system for a clean-type coal production line according to claim 1, characterized in that : A gas detector (20) and a reflux pipe (21) are sequentially arranged on the exhaust pipe (14) along the gas flow direction. The end of the reflux pipe (21) is communicated with the air inlet chamber (9).
6. The integrated waste gas treatment system for a clean coal production line according to claim 1, wherein : The cross-sectional area inside the horizontal pipe (11) gradually decreases from the liquid inlet chamber (8) to the reaction chamber (10).
7. The integrated waste gas treatment system for a clean coal production line according to claim 1, characterized in that : A baffle cylinder (22) is concentrically arranged in the reaction chamber (10) outside the vertical cylinder (13). The lower end of the baffle cylinder (22) is fixedly connected to the bottom of the reactor (3), and there is a flow passage between the upper end and the top of the reactor (3).