Device for dust removal of industrial furnace flue gas

Abstract

The application provides a device for dust removal of flue gas of an industrial furnace, which is used in the field of environmental protection technology.The system comprises a clean water system, a sewage system and a dust removal reaction kettle, wherein the dust removal reaction kettle comprises a plurality of dust removal devices; the clean water system provides spraying water for the dust removal reaction kettle; high-temperature flue gas flows into a first dust removal device under the action of spraying, and is cooled and dusted; the flue gas passing through the first dust removal device continues to flow to a second dust removal device, and is repeatedly cooled and dusted until the flue gas flows to the last dust removal device; the flue gas treated by the plurality of dust removal devices is discharged by a smoke exhaust device; and sewage passing through the dust removal reaction kettle is separated from water by the sewage system. The device can effectively reduce the temperature of high-temperature flue gas, dissolve the smoke dust and pollutants in the flue gas, and finally achieve the effect of purifying the smoke dust.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology, specifically to a device for dust removal from industrial furnace flue gas. Background Technology

[0002] Industrial furnaces are used for high-temperature heating, reaction, or sintering of various raw materials, and are widely used in production processes in industries such as metal smelting and petrochemicals. Because the flue gas temperature is too high, it can damage filter bags, affecting dust collection efficiency and service life, making it impossible to directly use traditional baghouse dust collectors for treatment.

[0003] With the increasing emphasis on environmental regulations and public awareness, the importance of industrial kiln flue gas dust removal technology is becoming more and more prominent. Equipment for industrial kiln flue gas dust removal can improve production safety and reduce the pollution of flue gas to the environment, playing an important role in improving air quality. Summary of the Invention

[0004] The present invention aims to provide a device for dust removal of flue gas from industrial furnaces and kilns, which solves the problem of dust collector bags burning at high temperatures, effectively reduces flue gas temperature, and improves dust removal efficiency.

[0005] According to one aspect of the present invention, an apparatus for dust removal from industrial furnace flue gas is provided, the system comprising a clean water system, a wastewater system, and a dust removal reaction vessel, wherein: The dust removal reactor includes multiple dust removal devices, which are arranged in the dust removal reactor from top to bottom. The flue gas that has passed through the previous dust removal device continues to flow to the next dust removal device to repeat the cooling and dust removal process until the flue gas flows to the last dust removal device. The water purification system provides spray water to the dust removal reactor, thereby cooling and removing dust from the incoming high-temperature flue gas through spraying. The wastewater system collects wastewater passing through the dust removal reactor and performs water-sludge separation.

[0006] According to some embodiments, the dust removal device includes: A cooling spray system, wherein the water sprayed by the cooling spray system mixes with the flue gas; Dust-removing umbrellas change the direction in which wastewater mixed with flue gas falls. The flue gas accelerator, after dust removal treatment, flows through the flue gas accelerator to the next layer of dust removal umbrella; A circular sewage tank is located below the dust removal umbrella to collect sewage falling from the umbrella.

[0007] According to some embodiments, the cooling spray system includes an annular nozzle.

[0008] According to some embodiments, the outlet of the annular nozzle is adjustable.

[0009] According to some embodiments, the clean water system includes a clean water supply pump and a dust suppression pipeline, wherein: A clean water supply pump supplies water to the cooling spray system through the dust suppression pipe.

[0010] According to some embodiments, the wastewater system includes wastewater pipes and a wastewater treatment tank, with the annular wastewater tank connected to the wastewater treatment tank via the wastewater pipes.

[0011] According to some embodiments, the flue gas accelerator is disposed below the central hole of the annular sewage tank.

[0012] According to some embodiments, the flue gas accelerator includes a trapezoidal barrel, wherein the flue gas inlet diameter of the trapezoidal barrel is larger than the flue gas outlet diameter of the trapezoidal barrel.

[0013] According to some embodiments, it also includes a smoke exhaust device and a flue gas duct, wherein the smoke exhaust device is connected to the dust removal reactor through the flue gas duct, thereby discharging the dust-removed flue gas.

[0014] According to some embodiments, the equipment for removing dust from industrial furnace flue gas also includes a sludge filter press for separating wastewater from sewage in the wastewater treatment pond, and the separated clean water is recycled.

[0015] The industrial furnace flue gas dust removal equipment according to an embodiment of the present invention uses a dust removal reactor to perform annular spray treatment on high-temperature flue gas, so that the dust dissolves in the water, achieving efficient dust removal while cooling down the flue gas.

[0016] According to an embodiment of the present invention, an industrial furnace flue gas dust removal device can cool and remove high-temperature flue gas through multiple stages to meet environmental emission requirements. Simultaneously, the wastewater separated by the dust collector is collected in a bottom wastewater treatment pond for mud-water separation, further improving water resource utilization.

[0017] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 A flowchart illustrating the operation of an industrial furnace flue gas dust removal device according to an example embodiment is shown.

[0020] Figure 2 A structural diagram of an industrial furnace flue gas dust removal device according to an example embodiment is shown.

[0021] Figure 3A schematic diagram of a dust removal device for an industrial furnace flue gas dust removal system according to an example embodiment is shown.

[0022] Figure 4 A top view schematic diagram of a dust removal device for an industrial furnace flue gas dust removal equipment according to an example embodiment is shown.

[0023] Figure 5 A schematic diagram of a flue gas accelerator for an industrial furnace flue gas dust removal device according to an example embodiment is shown.

[0024] Figure 6 A schematic diagram of the structure of an industrial furnace flue gas dust removal device according to an example embodiment is shown.

[0025] Figure 7 A plan view of an industrial furnace flue gas dust removal device according to an example embodiment is shown. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0027] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the invention.

[0028] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0029] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0030] It should be understood that although the terms first, second, third, etc., may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Therefore, the first component discussed below may be referred to as the second component without departing from the teachings of the present invention. As used herein, the term "and / or" includes all combinations of any one and more of the associated listed items.

[0031] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this invention are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0032] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments, and the modules or processes in the drawings are not necessarily essential for implementing the present invention, and therefore cannot be used to limit the scope of protection of the present invention.

[0033] In the field of flue gas dust removal technology, baghouse dust collectors are a common method for separating particulate matter from flue gas. However, under high-temperature flue gas conditions, the filter bag material is easily damaged or aged, affecting the dust removal efficiency. Furthermore, filter bags are prone to combustion at high temperatures, posing a safety hazard. To reduce flue gas temperature, many companies add flue gas coolers before the baghouse dust collection stage. However, adding flue gas coolers during the dust removal process increases system resistance and fan power, leading to increased production and operating costs.

[0034] Therefore, this invention proposes a dust removal device for industrial furnace flue gas, solving the problem of dust removal for high-temperature flue gas. It is particularly suitable for industries such as steel mills, cement plants, refractory material plants, and lime kilns where baghouse dust collectors cannot be used. According to the example embodiment, a clean water system sprays the high-temperature flue gas to achieve a cooling effect while dissolving the dust in the flue gas in the water. The flue gas and wastewater are then separated by a dust removal device. Through repeated dust removal and cooling by multiple layers of dust removal devices, the final emitted flue gas meets environmental protection requirements.

[0035] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention.

[0036] Figure 1 A flowchart illustrating the operation of an industrial furnace flue gas dust removal device according to an example embodiment is shown.

[0037] See Figure 1The high-temperature flue gas generated during the production process needs to go through a water cooling and dust removal system, a dust removal and filtration device, and a wastewater separation system before the treated flue gas is discharged by the exhaust device.

[0038] The high-temperature flue gas first enters the clean water system for preliminary cooling and dust removal. The high-temperature flue gas mixes with the sprayed water mist, causing the dust particles in the flue gas to condense upon contact with the moist water droplets, forming larger particles, which is beneficial for the subsequent dust removal process. At the same time, the evaporation of water also helps to absorb heat from the flue gas and reduce its temperature.

[0039] In S101, high-temperature flue gas flows into the dust removal device.

[0040] According to the example embodiment, the dust removal device plays a major role in dust removal and filtration in the industrial furnace flue gas dust removal equipment. High-temperature flue gas flows into the dust removal device for flue gas dust removal treatment. By bringing the high-temperature flue gas into contact with the water sprayed by the dust removal device, dust particles are dissolved in the liquid droplets or captured by the liquid film, thus achieving the dust removal effect.

[0041] In S103, the clean water system provides spray water for the dust removal device.

[0042] In industrial furnace flue gas dust removal equipment, the clean water system provides spray water for the dust removal device. The sprayed water can not only effectively reduce the temperature of the high-temperature flue gas, but also dissolve the dust in the flue gas into the water, thus achieving the effect of dust removal and cooling.

[0043] The clean water system uses a clean water pump to draw clean water from a clean water tank or reservoir and pressurize it before sending it into the clean water pipeline. The flow rate and pressure of the clean water pump can be adjusted according to actual needs to meet the different requirements of the sprinkler system. The clean water system includes a clean water tank to store sufficient clean water, which can come from tap water, groundwater, and / or recycled wastewater.

[0044] Clean water is delivered to an annular nozzle through a clean water pipe, and then sprayed out as a mist or spray pattern. The design and number of nozzles affect the spraying effect, such as the degree of atomization and the coverage area. For example, the annular nozzle disclosed in Chinese Patent Application 202221890150.0 can be used, but the solution in this application is not limited to this.

[0045] In S105, the high-temperature flue gas undergoes the first stage of dust removal and cooling under the action of spraying.

[0046] According to the example embodiment, the high-temperature flue gas first enters the clean water system for preliminary cooling and dust removal. The flue gas mixes with the water mist sprayed from the annular nozzle, causing the dust particles in the flue gas to condense upon contact with the moist water droplets, forming larger particles, which is beneficial for the subsequent dust removal process. At the same time, the evaporation of water also helps to absorb heat from the flue gas, reducing its temperature.

[0047] Because industrial furnace flue gas dust removal equipment includes multiple dust removal devices, arranged sequentially from top to bottom as the first dust removal device, the second dust removal device, and so on, high-temperature flue gas first flows into the first dust removal device in the industrial furnace flue gas dust removal equipment, where it undergoes the first stage of cooling and dust removal under the action of spraying. The dust removal umbrellas are arranged in a multi-layered manner in the dust removal reactor, with a certain distance between each layer. The high-temperature flue gas enters from the top inlet and passes through each layer of dust removal umbrellas sequentially from top to bottom. When the high-temperature flue gas enters the first dust removal device, it first comes into contact with the water film above the dust removal umbrellas, utilizing the heat absorption of water evaporation to lower the flue gas temperature. Simultaneously, dust particles adhere to the water film, achieving the first stage of dust removal and cooling.

[0048] In S107, the flue gas that has undergone the first stage of cooling and dust removal continues to undergo the second stage of cooling and dust removal, repeating the cooling and dust removal process until the flue gas flows through the final stage of cooling and dust removal.

[0049] In industrial furnace flue gas dust removal equipment, after the flue gas has undergone the first stage of cooling and dust removal, it passes through a flue gas accelerator below the first layer of dust collectors. This accelerator alters the flow pattern of the flue gas, increasing the contact area and time between the flue gas and the dust collectors, thus improving the cooling and dust removal effect. The flue gas then flows downwards through the second dust removal device for further cooling and dust removal. Similarly, the flue gas passes through the third, fourth, and so on, until the final dust removal device, repeatedly undergoing cooling and dust removal.

[0050] The flue gas flowing from the first dust removal device enters the second dust removal device. After the first stage of cooling and dust removal, the flue gas continues to undergo the second stage of cooling and dust removal. The flue gas flowing from the second dust removal device continues to flow into the next layer of dust removal devices, where the cooling and dust removal operation is repeated under the action of spray and dust removal devices until the flue gas flows to the last layer of dust removal devices. After the final stage of cooling and dust removal operation, the dust removal process of the entire system is completed. Step S111 is performed to discharge the treated flue gas. After multiple cooling and dust removal processes, the flue gas has been cooled to a suitable emission temperature, and most of the dust has been removed. The gas discharged from the exhaust device is purified flue gas.

[0051] In S109, the wastewater that has passed through the dust removal device undergoes water-sewage separation through the wastewater system.

[0052] Each stage of cooling and dust removal generates wastewater, which flows out of the dust removal device and flows into the wastewater treatment tank through wastewater pipes. Wastewater generated after each dust removal stage flows into the annular wastewater tank in each layer of the dust removal device, and then flows into the wastewater treatment tank through wastewater pipes.

[0053] The wastewater treatment tank is located at the very bottom of the entire system and is used to store wastewater. The wastewater system also includes a sludge filter press, which separates the wastewater from the wastewater in the wastewater treatment tank through compression.

[0054] A sludge filter press is a device used to treat sediment in wastewater treatment ponds. According to some embodiments, when the wastewater in the treatment pond accumulates to a certain level, the sludge filter press is started. Pressing the pressing button on the sludge filter press causes the hydraulic cylinder to advance. Once the pressure gauge reaches the set working value, it automatically stops, and the sludge filter press is ready. During operation, the wastewater is first fed into the feed chamber inside the machine and pressed by the hydraulic cylinder. The cylinder pushes the rollers downwards, squeezing out the water and solidifying the sediment into lumps. After pressing, the drain valve is opened, and the pressing pump is turned off. The entire pressing process is complete, and the discharged water can be recycled.

[0055] In this example embodiment, the main function of the sludge filter press is to separate the wastewater generated during the dust removal stage of the industrial furnace flue gas dust removal equipment from the bottom wastewater treatment tank, making wastewater treatment more efficient, environmentally friendly, and water-saving.

[0056] Figure 2 A structural diagram of an industrial furnace flue gas dust removal device according to an example embodiment is shown.

[0057] According to the example embodiment, industrial furnaces and kilns mainly need to process high-temperature flue gas, and inventions are specifically designed and invented for processing high-temperature flue gas. Figure 2 The industrial furnace flue gas dust removal equipment shown is shown.

[0058] See Figure 2 The industrial furnace flue gas dust removal equipment includes a dust removal reactor 101, a clean water system 201, and a wastewater system 301. The high-temperature flue gas generated by the industrial furnace is cooled and dusted by the dust removal reactor 101, and the finally treated flue gas is discharged by the exhaust device 401.

[0059] According to the example embodiment, the dust removal reactor 101 includes a multi-layer dust removal device. This article takes a five-layer dust removal device as an example, with a first dust removal device 111, a second dust removal device 112, and a fifth dust removal device 115 arranged from top to bottom.

[0060] According to an example embodiment, the clean water system 201 includes a clean water supply pump 222 and six dust suppression pipes 211-216. The clean water supply pump 222 supplies water to the multi-layer dust removal device in the dust removal reactor 101 through the dust suppression pipes 211-216. The clean water supply pump 222 is made of acid and alkali resistant material. The clean water supply pump 222 also supplies water to the six dust suppression pipes 211-216 because industrial furnace flue gas dust removal equipment needs to handle various liquids that may contain acidic or alkaline substances. The six dust suppression pipes 211-216 are also made of acid and alkali resistant material.

[0061] An electronic flow valve is installed at the outlet of each dust suppression duct, and the water flow rate is adjusted by the electronic flow valve. One clean water supply pump 222 can supply water to multiple dust suppression ducts simultaneously, reducing the number of equipment and the floor space required, and improving work efficiency. By installing an electronic flow valve at the outlet of each duct, the water flow rate of each cleaning duct can be precisely adjusted according to actual needs, ensuring cleaning effectiveness while avoiding water waste. The electronic flow valve has good stability and reliability, and can maintain stable performance under long-term continuous operation, extending the service life of the equipment. By precisely controlling the flow rate, unnecessary energy consumption can be reduced, which helps to reduce operating costs and environmental emissions.

[0062] According to an example embodiment, the sewage system 301 includes a sewage pipe 321, a sewage flow valve 322, a bottom sewage treatment tank 323, and five annular sewage tanks 311-315. The annular sewage tanks 311-315 are connected to the bottom sewage treatment tank 323 via the sewage pipe 321.

[0063] Taking the first stage of cooling and dust removal as an example, high-temperature flue gas enters the dust removal reactor 101 and first flows through the first dust removal device 111. The clean water sprayed from the dust removal pipe 211 mixes with the high-temperature flue gas, which not only cools the gas but also dissolves the dust in the flue gas in the water. The mixture of flue gas and water is processed by the first dust removal device 111, and the wastewater flows out from the annular wastewater tank 311 and into the wastewater treatment tank 323 through the wastewater pipe 321. The flue gas after being processed by the first dust removal device 111 flows into the second dust removal device 112, and the clean water sprayed from the dust removal pipe 213... The flue gas, after being treated by the first dust removal device 111, is mixed with the remaining dust in the water. The mixture of flue gas and water is then treated by the second dust removal device 112. The wastewater from the second stage of cooling and dust removal flows out from the annular wastewater tank 313 and into the wastewater treatment tank 323 via the wastewater pipe 321. The lower layers of dust removal devices in the dust removal reactor have the same structure as the first dust removal device 111 and the second dust removal device 112. The flue gas undergoes repeated cooling and dust removal treatment. Finally, the flue gas flowing out through the fifth dust removal device 115 is discharged through the exhaust device 401. See the schematic diagram of the industrial furnace flue gas dust removal equipment. Figure 6 .

[0064] In this example embodiment, the dust and other pollutants in the flue gas have been dissolved in water and separated into a wastewater treatment tank by a multi-layer dust removal device. The flue gas discharged by the exhaust device is flue gas that has undergone multiple cooling and dust removal processes. In addition, during the production process of industrial furnaces and kilns, flue gas containing harmful gases such as chlorine, sulfur, mercury, and lead can be treated by adding alkaline solutions (such as lime milk, sodium carbonate solution, etc.) to absorb chlorine-containing gases during the cooling and dust removal process in the dust removal reactor, neutralizing sulfur-containing gases by spraying desulfurization and dust removal liquid, and capturing mercury vapor and lead vapor in the flue gas using chemical absorption or adsorption methods by injecting adsorbents such as activated carbon powder or metal oxides.

[0065] A flue gas emission data detection probe is installed at the flue gas outlet. This probe is connected to an environmental protection platform computer to ensure that the emitted flue gas meets environmental protection requirements. The probe is specifically designed to measure flue gas composition and parameters, directly contacting the flue gas to quickly and accurately acquire real-time data. It can monitor the concentration of various harmful substances in the flue gas, such as sulfur oxides, nitrogen oxides, and particulate matter, in real time. The probe wirelessly transmits the collected data to the environmental protection platform computer. Through the flue gas emission data detection probe and the environmental protection platform computer, enterprises can monitor their flue gas emissions in real time to ensure compliance with environmental regulations. Simultaneously, environmental protection departments can also remotely monitor the enterprise's flue gas emissions by accessing the enterprise's environmental protection platform, thereby achieving more effective supervision.

[0066] Figure 3 A schematic diagram of a dust removal device for an industrial furnace flue gas dust removal system according to an example embodiment is shown.

[0067] As mentioned above, Figure 2 The dust removal reactor 101 in the industrial furnace flue gas dust removal equipment shown includes five layers of dust removal devices. The dust removal devices 111-115 have the same structure, only their locations differ. Taking the first dust removal device 111 as an example, see... Figure 3 This shows the various structural components of the dust removal device.

[0068] According to an example embodiment, the first dust removal device 111 includes a dust collection duct 211, an annular nozzle 213, a dust collection umbrella 121, a flue gas accelerator 123, and an annular wastewater tank 311. The annular nozzle 213 is positioned above the dust collection umbrella 121, the annular wastewater tank 311 is vertically positioned below the dust collection umbrella 121, and the flue gas accelerator 123 is located at the center of the annular wastewater tank 311. A top view of the first dust removal device 111 is shown below. Figure 4 .

[0069] The dust collection pipe 211 and the annular nozzle 213 form a cooling spray system. One end of the cooling spray system is connected to a clean water system, and the water source for the cooling spray system is provided by a clean water supply pump 222. The other end of the cooling spray system is the annular nozzle 213, which sprays water onto the flue gas. The outlet of the annular nozzle is adjustable. The high-temperature flue gas flowing into the first dust removal device first mixes with the water sprayed by the annular nozzle 213, and some of the dust dissolves in the water before flowing towards the dust removal umbrella 121. The dust removal umbrella 121 is fixed in the entire dust removal device by a steel frame. The annular nozzle 213 is positioned directly above the dust removal umbrella 121, and the distance between the dust removal umbrella 121 and the annular nozzle 213 is 100-300mm.

[0070] According to the example embodiment, the tilt angle of the umbrella surface of the dust removal umbrella 121 is designed to be 30°~45°. This angled umbrella surface ensures that the mixture is evenly distributed and flows smoothly on the umbrella surface. The umbrella surface of the dust removal umbrella 121 is made of 316L stainless steel, an acid and alkali resistant material with excellent corrosion resistance. When treating flue gas mixtures containing various chemical substances, the use of 316L stainless steel ensures the long-term stable operation of the dust removal device. The dust removal umbrella 121 is used to treat smoke and pollutants in water-air mixtures, allowing the water-air mixture to form a uniformly distributed water film on the umbrella surface, thereby more effectively capturing smoke and pollutants.

[0071] When the mixture of high-temperature flue gas and water flows toward the dust removal umbrella 121, it is intercepted by the umbrella surface. The gas containing dust flows from the center of the umbrella to the surrounding areas, which increases the contact area between the flue gas and the water droplets, helping the dust particles to adhere to the water droplets. Due to the design of the inclined umbrella surface, the sewage flows down the slope of the umbrella surface and flows into the annular sewage pool 311 below the dust removal umbrella. The design of the dust removal umbrella 121 can ensure smooth water flow, reduce blockage, and facilitate subsequent sewage treatment.

[0072] The gas containing soot flows through the flue gas accelerator 123 to the second dust removal device. The flue gas accelerator 123 is designed to increase the flow rate of the soot, allowing the gas to pass through the flue gas channel more effectively. The flue gas accelerator can be designed with the flue area adjusted according to the flue gas flow rate, thereby improving the flue gas velocity to achieve the purpose of purifying the soot. The flue gas accelerator 123 accelerates the flue gas. A schematic diagram of the flue gas accelerator is shown below. Figure 5 As shown, the flue gas accelerator changes the diameter of the flue gas duct from 2D to D. Since the resistance to gas flow is inversely proportional to the cross-sectional area of ​​the duct, the reduction in the flue gas diameter leads to an increase in the flue gas velocity. As the flue gas passes through the flue gas accelerator, the flue gas velocity is significantly improved, which helps to improve the contact efficiency of the mixture of dust and water mist, thereby improving the dust removal efficiency of the entire system.

[0073] The annular wastewater tank 311 stores the wastewater separated by the dust collector umbrella 121. The annular wastewater tank 311 is connected to the wastewater pipe 321 in the wastewater system. After the first stage of cooling and dust removal treatment, the wastewater flows through the annular wastewater tank 311 and the wastewater pipe 321, ultimately flowing into the bottom wastewater treatment tank 323, thus ensuring continuous and stable treatment of dust. Wastewater often contains various acidic and alkaline substances, so the sewage pipes must be acid and alkali resistant. The sewage system can be made of materials such as fiberglass, which has good corrosion resistance and impact resistance, and will not be damaged by acidic or alkaline liquids, ensuring the service life of the dust removal equipment.

[0074] In this example embodiment, the installation of a flue gas accelerator in the structure of the dust removal device can make the flue area more uniform, thereby increasing the flue gas velocity, avoiding local blockage, and allowing the flue gas to be discharged more quickly, thus improving the working efficiency of the entire industrial furnace flue gas dust removal equipment.

[0075] Figure 6 A schematic diagram of the structure of an industrial furnace flue gas dust removal device according to an example embodiment is shown.

[0076] See Figure 6 The industrial furnace flue gas dust removal equipment mainly consists of the following parts as shown in the diagram: dust removal reactor 101, clean water system 201, wastewater system 301, and exhaust device 401. A plan view of the industrial furnace flue gas dust removal equipment is shown below. Figure 7 There is a flue gas pipe 131 between the dust removal reactor 101 and the smoke exhaust device 401. The smoke exhaust device 401 includes a flue gas diffuser and a demisting umbrella 411.

[0077] The dust removal reactor 101 includes five dust removal devices: a first dust removal device 111, a second dust removal device 112, a third dust removal device 113, a fourth dust removal device 114, and a fifth dust removal device 115. These five dust removal devices 111-115 are arranged from top to bottom within the dust removal reactor 101. The clean water system 201 provides spray water to the dust removal reactor 101. Under the spraying action, the high-temperature flue gas flows into the first dust removal device 111 for cooling and dust removal. The flue gas passing through the first dust removal device 111 continues to flow to the second dust removal device 112, where the cooling and dust removal are repeated until the flue gas flows to the last dust removal device, the fifth dust removal device 115. After multiple dust removal processes, the flue gas flows through the flue gas pipe 131 to the exhaust device 401. The wastewater from the dust removal reactor 101 undergoes water-sludge separation through the wastewater system 301.

[0078] According to the example embodiment, the diffuser and demister 411 in the flue gas exhaust device 401 are of great significance for improving the quality of flue gas emissions and protecting the environment. The main function of the flue gas diffuser is to evenly disperse the flue gas discharged from the chimney outlet into the atmosphere. By increasing the contact area between the flue gas and the atmosphere, it can accelerate the cooling and dilution of the flue gas, reduce its temperature and concentration, and minimize its impact on the surrounding environment. The demister is installed inside the flue gas exhaust device 401, and its main purpose is to remove droplets such as water mist and acid mist from the flue gas. When the flue gas passes through the demister, the droplets adhere to the surface of the demister due to gravity and inertia, then flow down the surface and are collected, preventing direct discharge into the atmosphere and causing pollution. The flue gas diffuser and demister play an important auxiliary treatment role in industrial furnace flue gas dust removal equipment.

[0079] In this example embodiment, the high-temperature flue gas flows into the dust removal device and first passes through the cooling spray system. The sprayed water vapor can reduce the temperature of the high-temperature flue gas and dissolve some of the dust and pollutants in the high-temperature flue gas. After the first stage of cooling and dust removal, the flue gas flows to the second dust removal device through the flue gas accelerator. After repeated cooling and dust removal processes, the purpose of purifying the dust is finally achieved.

[0080] In this example embodiment, the annular sewage tank vertically arranged below the dust removal umbrella ensures that all sewage separated from the umbrella surface flows into the annular sewage tank. Multiple annular sewage tanks in the industrial furnace flue gas dust removal equipment are connected to sewage pipes, ultimately converging the sewage into the bottom sewage treatment tank. The sewage treatment tank uses a sludge filter press to separate water and sewage, dewatering the sewage. The separated sludge is then cleaned and treated, while the separated clean water can be recycled. Using a sludge filter press to treat sewage can reduce the system's water consumption, completing sewage collection, discharge, and water recycling in a fixed space, improving system efficiency and saving costs.

[0081] Those skilled in the art will clearly understand that the technical solutions of the present invention can be implemented using software and / or hardware. In this specification, "unit" and "module" refer to software and / or hardware capable of independently performing or cooperating with other components to perform a specific function.

[0082] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0083] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0084] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some service interface; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0085] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0086] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0087] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0088] Exemplary embodiments of the present invention have been specifically shown and described above. It should be understood that the present invention is not limited to the detailed structures, arrangements, or implementations described herein; rather, the present invention is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended provisions.

Claims

1. A device for dust removal from flue gas in industrial furnaces and kilns, characterized in that, The equipment includes a clean water system, a wastewater system, and a dust removal reactor, wherein: The dust removal reactor includes multiple dust removal devices, which are arranged in the dust removal reactor from top to bottom. The flue gas that has passed through the previous dust removal device continues to flow to the next dust removal device to repeat the cooling and dust removal process until the flue gas flows to the last dust removal device. Each of the dust removal devices includes: A cooling spray system, wherein the water sprayed by the cooling spray system mixes with the flue gas; Dust-removing umbrellas change the direction in which wastewater mixed with flue gas falls. A circular sewage tank is located below the dust removal umbrella to collect sewage falling from the dust removal umbrella; The flue gas accelerator is used to precipitate the flue gas after dust removal. The flue gas flows to the next layer of dust removal umbrella through the flue gas accelerator. The flue gas accelerator is located below the central hole of the annular sewage tank. The flue gas accelerator includes a trapezoidal barrel. The flue gas inlet diameter of the trapezoidal barrel is larger than the flue gas outlet diameter of the trapezoidal barrel. The water purification system provides spray water to the dust removal reactor, thereby cooling and removing dust from the incoming high-temperature flue gas through spraying. The wastewater system collects wastewater passing through the dust removal reactor and performs water-sludge separation.

2. The device according to claim 1, characterized in that, The cooling spray system includes annular nozzles.

3. The device according to claim 2, characterized in that, The outlet of the annular nozzle is adjustable.

4. The device according to claim 1, characterized in that, The clean water system includes a clean water supply pump and a dust suppression pipeline. The clean water supply pump supplies water to the cooling spray system through the dust suppression pipeline.

5. The device according to claim 1, characterized in that, The wastewater system includes wastewater pipes and a wastewater treatment tank, and the annular wastewater tank is connected to the wastewater treatment tank through the wastewater pipes.

6. The device according to claim 1, characterized in that, It also includes a smoke exhaust device and a flue gas duct. The smoke exhaust device is connected to the dust removal reactor through the flue gas duct, thereby discharging the dust-removed flue gas.

7. The device according to claim 5, characterized in that, Also includes: A sludge filter press is used to separate wastewater from sewage in the wastewater treatment pond, and the separated clean water is recycled.

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