Efficient control device for discharging dust removal

Abstract

The utility model relates to the technical field of drying equipment, in particular to an efficient discharging dust removal control device which comprises a drying furnace body, the bottom of the drying furnace body is connected with the air outlet end of a fluidized bed furnace through an air inlet pipe, and an air outlet pipe is arranged at the upper end of the drying furnace body. The air inlet pipe is connected with the spraying end of the spraying assembly and the air outlet end of the air supply assembly, and a detection assembly is installed on the air outlet pipe. According to the utility model, tail gas entering the furnace body can be accurately controlled, dust entering the furnace body can be reduced, and long-period safe and stable operation of equipment can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and in particular to a high-efficiency dust removal control device for furnace discharge. Background Technology

[0002] Vertical drying ovens are a common type of mechanical equipment used for drying materials, and are widely used due to their high efficiency and energy saving.

[0003] In recent years, with the development of materials science and technology, the technical level of vertical drying furnaces has been continuously improved. Currently, vertical drying furnaces not only possess excellent drying efficiency and durability, but can also be customized for different application scenarios. Vertical drying furnaces are suitable for drying briquettes in the coal industry and briquette production, such as briquettes, coke powder pellets, and non-ferrous metal ore powder pellets. They also show outstanding effects in drying gasified briquettes in the chemical industry, drying after pelletizing and briquetting metallurgical auxiliary materials, and direct smelting. Common vertical drying furnaces mainly use high-temperature gas generated by a fluidized bed furnace to dry the materials inside the furnace. Since the fluidized bed furnace is primarily used to heat other materials, the exhaust gas generated is used to dry the materials inside the furnace. The fluidized bed furnace prioritizes heating other materials, leading to unstable exhaust gas entering the vertical drying furnace. This results in excessively high local temperatures within the furnace, or safety hazards during the conveying process. Furthermore, the exhaust gas contains a large amount of impurities or dust, which can contaminate the materials inside the furnace and reduce the quality of the dried items.

[0004] Therefore, those skilled in the art are dedicated to developing a high-efficiency dust removal control device for furnace exit, which is conducive to accurately controlling the exhaust gas entering the furnace and reducing the dust entering the furnace, thereby ensuring the long-term safe and stable operation of the equipment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a high-efficiency dust removal control device for furnace discharge, which is conducive to precise control of the exhaust gas entering the furnace body and ensures the long-term safe and stable operation of the equipment.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A high-efficiency dust control device for furnace exit, comprising:

[0008] The drying oven body has an air inlet pipe at its bottom connected to the air outlet of the fluidized bed furnace, and an air outlet pipe at its upper end.

[0009] The air inlet pipe is connected to the spray end of the spray assembly and the air outlet end of the air supply assembly, and a detection component is installed on the air outlet pipe.

[0010] The beneficial effects of adopting the above scheme are: the air inlet pipe connects the spray assembly and the air supply assembly. The spray assembly is used to spray cooling water or agents into the air inlet pipe, and the air supply assembly is used to introduce inert gas into the air inlet pipe, so as to stabilize the temperature of the exhaust gas entering the drying oven body and reduce the safety hazards caused by excessive temperature.

[0011] When the spray pipe sprays the agent into the air inlet pipe, it is used to remove impurities (such as nitrogen oxides and corrosive impurities) in the drying exhaust gas, and at the same time remove impurities and dust mixed in the exhaust gas, so as to avoid impurities and dust affecting the quality of the items in the drying oven. The detection component on the exhaust pipe monitors the exhaust gas temperature, composition and other parameters in real time, which is conducive to the automatic adjustment of the control device.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the spray assembly includes a spray box installed on the air inlet pipe, the lower side of the spray box is connected to the collection box, and the upper side of the spray box is connected to a spray pump and a spray water tank in sequence through a water inlet pipe.

[0014] The beneficial effects of adopting the above-mentioned further solution are: by spraying the exhaust gas through the spray assembly, the temperature of the exhaust gas can be quickly reduced by utilizing the principle of heat absorption by water evaporation, so that it reaches a temperature range suitable for entering the drying oven body, thus avoiding damage to the equipment and materials caused by the direct entry of high-temperature exhaust gas. At the same time, the spray water also serves to adsorb dust and impurities and remove harmful gases.

[0015] The spray tank is connected to the collection tank, which collects the sprayed water. After proper treatment, the water can be reused for spraying, achieving water resource recycling and reducing production costs. When spraying chemicals, it facilitates the rapid adsorption and transport of impurities in the gas to the collection tank for further processing.

[0016] Furthermore, a spray pipe is also installed inside the spray box, the spray pipe is connected to the water inlet pipe and multiple spray heads are installed on the spray pipe.

[0017] The beneficial effects of adopting the above-mentioned further solution are: the spray pipe and multiple spray heads enable the spray water to be distributed more evenly in the air intake pipe, so as to carry out comprehensive and uniform spray treatment on the exhaust gas, improve the spray effect and efficiency, and reduce the content of impurities and dust in the exhaust gas.

[0018] Furthermore, the spray head has a bottom surface and multiple side surfaces, and spray nozzles are provided on both the bottom surface and the side surfaces.

[0019] The beneficial effects of adopting the above-mentioned further solution are: spray nozzles are provided on the bottom and sides of the spray head, which can make the spray water sprayed out at multiple angles and in all directions, increasing the coverage area of ​​the spray water, ensuring that the exhaust gas and the spray water are in full contact, and further improving the spray treatment effect.

[0020] Furthermore, the gas supply assembly includes an intake branch pipe communicating with the intake pipe, and the other end of the intake branch pipe is sequentially connected to a control valve and an inert gas tank.

[0021] The beneficial effects of adopting the above-mentioned further solution are: the gas supply component, by connecting to an inert gas tank, can introduce inert gas, such as nitrogen, into the inlet pipe when needed, which can effectively prevent dangerous situations such as combustion or explosion of exhaust gas during transportation and improve the safety of the entire device.

[0022] At the same time, the low-temperature inert gas and the high-temperature exhaust gas are mixed to reduce the temperature of the gas entering the drying oven, so that it reaches a temperature range suitable for entering the drying oven body.

[0023] Furthermore, an injection pump is installed inside the air inlet pipe. The air inlet end of the injection pump is connected to the air outlet end of the fluidized bed furnace, the air outlet end of the injection pump is connected to the bottom of the drying furnace body, and the suction end of the injection pump is connected to the air inlet branch pipe.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the jet pump enables the high-temperature exhaust gas and the low-temperature inert gas to be mixed quickly and evenly.

[0025] Furthermore, the detection components include an exhaust gas concentration detection component and a water vapor concentration detection component, both of which are electrically connected to the control device.

[0026] The beneficial effects of adopting the above-mentioned further solution are: the exhaust gas concentration detection component and the water vapor concentration detection component can monitor the exhaust gas concentration and water vapor concentration in the exhaust gas discharged during the drying process in real time, providing accurate monitoring data for the control device so as to understand the drying effect and exhaust gas emission status in a timely manner.

[0027] Furthermore, multiple temperature sensors are installed inside the drying oven body, and the temperature sensors are electrically connected to the control device.

[0028] The beneficial effects of adopting the above-mentioned further solution are: multiple temperature sensors are installed inside the drying oven body, which can monitor the temperature at different locations inside the oven in real time, comprehensively and accurately grasp the temperature distribution inside the oven, and provide reliable data support for precise control of drying temperature.

[0029] Furthermore, a gas flow control valve is installed at the end of the air inlet pipe and on the side near the gas outlet of the fluidized bed furnace, and the gas flow control valve is electrically connected to the control device.

[0030] The beneficial effects of adopting the above-mentioned further solution are: the gas flow electronic control valve is installed at the end of the inlet pipe near the gas outlet of the fluidized bed furnace, which can directly and accurately control the flow rate of the exhaust gas entering the inlet pipe from the fluidized bed furnace, ensuring that the amount of exhaust gas entering the drying furnace body meets the production requirements, and avoiding the impact of excessive or insufficient exhaust gas flow on the drying effect and equipment operation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a high-efficiency dust removal control device for furnace exit according to a specific embodiment of this utility model;

[0032] Figure 2 This is a schematic diagram of the planar structure of a high-efficiency dust removal control device for furnace exit according to a specific embodiment of this utility model;

[0033] Figure 3 This is a schematic diagram of the vertical spray assembly and air supply assembly according to a specific embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of a spray head structure according to a specific embodiment of the present invention.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Drying oven body; 2. Air inlet pipe; 3. Fluidized bed oven; 4. Spray assembly; 5. Air supply assembly; 6. Spray box; 7. Collection box; 8. Water inlet pipe; 9. Spray pump; 10. Spray water tank; 11. Spray pipe; 12. Spray head; 13. Bottom surface; 14. Side surface; 15. Spray nozzle; 16. Air inlet branch pipe; 17. Control valve; 18. Inert gas tank; 19. Jet pump; 20. Waste gas concentration detection assembly; 21. Water vapor concentration detection assembly; 22. Temperature sensor; 23. Gas flow control valve; 24. Air outlet pipe. Detailed Implementation

[0037] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0038] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a high-efficiency dust removal control device for furnace discharge includes a drying furnace body 1. The drying furnace body 1 includes a vertically arranged cylindrical structure with a large internal space for accommodating materials to be dried. The upper part of the drying furnace body 1 is connected to a feeding device via a feeding pipe. The drying furnace body 1 is equipped with a perforated material dispersing cone or a reciprocating inclined mesh plate. The material falls layer by layer under the action of gravity. At the same time, a vibration device (such as a vibrating plate or a motor) prevents the material from accumulating or bridging. During the material falling process, the drying gas flows from bottom to top and forms convection with the falling material, carrying away the moisture on the surface and inside of the material.

[0042] The bottom of the drying furnace body 1 is connected to the outlet of the fluidized bed furnace 3 via an air inlet pipe 2. The exhaust gas generated by the fluidized bed furnace 3 serves as a heat source, and its high-temperature exhaust gas is transported into the drying furnace body 1 through the air inlet pipe 2 to provide the necessary heat for drying the material. The upper end of the drying furnace body 1 has an exhaust pipe 24 for discharging the waste gas and water vapor generated during the drying process, maintaining good ventilation inside the furnace and ensuring the smooth progress of the drying process.

[0043] The air inlet pipe 2 is connected to the spray end of the spray assembly 4 and the air outlet end of the air supply assembly 5. A detection component is installed on the air outlet pipe 24.

[0044] In this invention, the air inlet pipe 2 is connected to the spray assembly 4 and the air supply assembly 5. The spray assembly 4 is used to spray cooling water or chemicals into the air inlet pipe 2, and the air supply assembly 5 is used to introduce inert gas into the air inlet pipe 2 to stabilize the temperature of the exhaust gas entering the drying oven body 1 and reduce the safety hazards caused by excessive temperature. At the same time, the sprayed chemicals are used to adsorb or react the impurities in the exhaust gas to generate non-harmful impurities, thereby reducing the adverse effects of harmful impurities on the items inside the drying oven body 1.

[0045] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the spray assembly 4 includes a spray box 6 installed on the air inlet pipe 2. The lower side of the spray box 6 is connected to a collection box 7, which is used to collect the water after spraying. The water in the collection box 7 can be recycled after appropriate treatment. A spray pump 9 and a spray water tank 10 are connected in sequence to the upper side of the spray box 6 through a water inlet pipe 8. A spray pipe 11 is also installed inside the spray box 6. The spray pipe 11 is connected to the water inlet pipe 8 and has multiple spray heads 12. Specifically, the spray head 12 has a bottom surface 13 and multiple side surfaces 14. Spray nozzles 15 are provided on the bottom surface 13 and the side surfaces 14. The multi-angle spray nozzles 15 make the spray water evenly distributed across the entire cross-section of the air inlet pipe 2, so as to carry out comprehensive and thorough spraying treatment on the exhaust gas, effectively reduce the exhaust gas temperature and remove impurities.

[0046] Dust and impurities (especially combustible dust) in the drying gas can easily cause an explosion when they reach a certain concentration. The spray assembly 4 uses water mist to adsorb dust, reducing the dust concentration in the gas to below the lower explosive limit. The spray assembly 4 also removes harmful substances (such as volatile organic compounds and acidic gases) from the drying gas, ensuring that exhaust emissions meet environmental standards. Furthermore, the spray system can serve as a rapid fire extinguishing method for initial fires. Although the spray device 4 will introduce some saturated water vapor into the drying gas, for non-hygroscopic materials such as briquettes and mineral powder, the moisture mainly exists in a free state. The difference between the surface water vapor pressure and the water vapor partial pressure of the drying medium is the main driving force for drying. If the humidity of the gas after spraying does not exceed the vapor pressure of the material surface (i.e., a dynamic equilibrium has not been reached), the water vapor can actually accelerate the diffusion of internal moisture outwards by enhancing the mass transfer gradient. Even though water vapor may affect drying efficiency, the benefits of the spray's explosion-proof function (such as reducing dust concentration to below the lower explosive limit) and equipment protection (such as reducing pipe blockage) far outweigh the process adjustment costs.

[0047] like Figure 1 , Figure 2 and Figure 3 As shown, the gas supply assembly 5 includes an inlet branch pipe 16 connected to the inlet pipe 2. The other end of the inlet branch pipe 16 is connected to a control valve 17 and an inert gas tank 18 in sequence. The control valve 17 can be an electrically controlled valve and is electrically connected to a control device (not shown in the figure). The flow rate and pressure of the inert gas can be precisely adjusted through the control valve 17. According to actual production needs, inert gas, such as nitrogen, is introduced into the inlet pipe 2 in a timely manner to prevent dangerous situations such as combustion or explosion of the tail gas during transportation, thereby improving the safety of the entire device. At the same time, the high-temperature tail gas is mixed with low-temperature inert gas, thereby reducing the temperature of the drying gas introduced into the drying furnace body 1 and avoiding irreversible damage to the material caused by excessively high-temperature drying gas.

[0048] like Figure 3As shown in the embodiment, in order to ensure uniform mixing of high-temperature exhaust gas and low-temperature inert gas, an injection pump 19 is installed in the intake pipe 2. Specifically, the intake end of the injection pump 19 is connected to the outlet end of the fluidized bed furnace 3, the outlet end of the injection pump 19 is connected to the bottom of the drying furnace body 1, and the suction end of the injection pump 19 is connected to the intake branch pipe 16.

[0049] In other embodiments, the jet pump 19 can effectively control the delivery process of exhaust gas from the outlet of the fluidized bed furnace 3 to the bottom of the drying oven body 1. By adjusting the operating parameters of the jet pump 19, the flow rate and pressure of the exhaust gas can be precisely controlled to ensure that the exhaust gas enters the drying oven body 1 stably and evenly, thereby further improving the stability of the drying effect.

[0050] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the detection components include an exhaust gas concentration detection component 20 and a water vapor concentration detection component 21. Both the exhaust gas concentration detection component 20 and the water vapor concentration detection component 21 are electrically connected to the control device. The exhaust gas concentration detection component 20 can monitor the concentration of exhaust gas (such as nitrogen oxides, sulfur compounds, carbon dioxide, etc.) in the exhaust gas discharged during the drying process in real time, while the water vapor concentration detection component 21 is used to detect the water vapor concentration in the exhaust gas. These monitoring data will be transmitted to the control device in a timely manner to provide accurate feedback information for the control device, so as to automatically control and optimize the drying process.

[0051] In this embodiment, multiple temperature sensors 22 are installed inside the drying oven body 1, and the temperature sensors 22 are electrically connected to the control device. The multiple temperature sensors 22 are evenly distributed at different locations within the drying oven body 1, enabling real-time monitoring of temperature changes throughout the oven and timely transmission of temperature data to the control device. Based on the received temperature information, the control device can precisely control the temperature during the drying process.

[0052] A gas flow control valve 23 is also installed at the end of the inlet pipe 2, near the outlet of the fluidized bed furnace 3. The gas flow control valve 23 is electrically connected to the control device. Through commands from the control device, the gas flow control valve 23 can automatically adjust its opening, thereby precisely controlling the flow rate of the exhaust gas entering the inlet pipe 2 from the fluidized bed furnace 3. This ensures that the flow rate of the exhaust gas entering the drying furnace body 1 meets production requirements, further improving the automation control level and operational stability of the entire device.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency dust removal control device for furnace discharge, characterized in that: include The drying furnace body (1) has an air inlet pipe (2) at the bottom connected to the air outlet of the boiling furnace (3) at the bottom, and an air outlet pipe (24) at the upper end of the drying furnace body (1). The air inlet pipe (2) is connected to the spray end of the spray assembly (4) and the air outlet end of the air supply assembly (5), and a detection component is installed on the air outlet pipe (24).

2. The high-efficiency dust removal control device for furnace discharge according to claim 1, characterized in that: The spray assembly (4) includes a spray box (6) installed on the air inlet pipe (2). The lower side of the spray box (6) is connected to the collection box (7). The upper side of the spray box (6) is connected to a spray pump (9) and a spray water tank (10) in sequence through a water inlet pipe (8).

3. The high-efficiency dust removal control device for furnace discharge according to claim 2, characterized in that: The spray box (6) is also equipped with a spray pipe (11), which is connected to the water inlet pipe (8) and has multiple spray heads (12) installed on it.

4. The high-efficiency dust removal control device for furnace exit according to claim 3, characterized in that: The spray head (12) has a bottom surface (13) and multiple side surfaces (14), and spray nozzles (15) are provided on the bottom surface (13) and the side surfaces (14).

5. The high-efficiency dust removal control device for furnace exit according to claim 1, characterized in that: The gas supply assembly (5) includes an intake branch pipe (16) that communicates with the intake pipe (2), and the other end of the intake branch pipe (16) is connected to a control valve (17) and an inert gas tank (18).

6. The high-efficiency dust removal control device for furnace exit according to claim 5, characterized in that: An injection pump (19) is installed inside the air inlet pipe (2). The air inlet end of the injection pump (19) is connected to the air outlet end of the boiling furnace (3). The air outlet end of the injection pump (19) is connected to the bottom of the drying furnace body (1). The suction end of the injection pump (19) is connected to the air inlet branch pipe (16).

7. The high-efficiency dust removal control device for furnace discharge according to claim 1, characterized in that: The detection components include an exhaust gas concentration detection component (20) and a water vapor concentration detection component (21), both of which are electrically connected to the control device.

8. The high-efficiency dust removal control device for furnace exit according to claim 7, characterized in that: Multiple temperature sensors (22) are installed inside the drying oven body (1), and the temperature sensors (22) are electrically connected to the control device.

9. The high-efficiency dust removal control device for furnace exit according to claim 7, characterized in that: A gas flow control valve (23) is also installed at the end of the air inlet pipe (2) and on the side near the gas outlet of the boiling furnace (3). The gas flow control valve (23) is electrically connected to the control device.

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