A flue gas denitrification and dust removal device

Abstract

This utility model belongs to the technical field of denitrification devices, and particularly relates to a flue gas denitrification and dust removal device, comprising: a raw material storage device for storing liquid raw materials required for the denitrification reaction; a dust removal and denitrification reaction device with a containment space; and a conveying device for conveying the liquid raw materials. The dust removal and denitrification reaction device includes an installation component for mounting dust removal components, a denitrification reaction component, and a gas discharge device for discharging the gas after the reaction. The gas discharge device contains a heat exchanger. The raw material storage device is connected to the gas input end of the dust removal and denitrification reaction device via the conveying device. This utility model solves the space problem in current technologies for dust removal and denitrification through the integrated design of dust removal and denitrification functions, achieving compact installation. Simultaneously, by utilizing a heat exchanger to process the liquid raw materials, it reduces front-end temperature changes, improves catalyst activity efficiency, and achieves energy saving and environmental protection, eliminating wastewater generation and secondary treatment costs.

Description

Technical Field

[0001] This utility model belongs to the technical field of denitrification devices, and in particular relates to a flue gas denitrification and dust removal device. Background Technology

[0002] Flue gas emitted from thermal power plants, smelters, and industrial boilers contains large amounts of NOx, which is a major pollutant that contributes to acid rain in the atmosphere.

[0003] Selective reduction (SCR) denitrification technology, as a mature and cost-effective denitrification technology, has been promoted and applied in industries such as power, gas boilers, alumina, and steel in recent years. However, due to the failure to consider subsequent environmental protection equipment during the original kiln construction, and with increasingly stringent environmental requirements, there is no space to install the new equipment, resulting in emissions that fail to meet standards.

[0004] Existing environmental protection equipment is basically denitrification equipment connected to dust removal equipment, and multiple devices are installed, resulting in limited floor space and space. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a flue gas denitrification and dust removal device.

[0006] In view of this, the present invention provides a flue gas denitrification and dust removal device, comprising:

[0007] Raw material storage device for storing liquid raw materials required for denitrification reaction;

[0008] A dust removal and denitrification reaction device with a containment space;

[0009] A conveying device for conveying the liquid raw material;

[0010] The dust removal and denitrification reaction device is equipped with an installation component for installing dust removal components, a denitrification reaction component, and a gas discharge device for discharging the gas after the reaction. The gas discharge device is equipped with a heat exchanger. The raw material storage device is connected to the gas input end of the dust removal and denitrification reaction device through a conveying device.

[0011] Preferably, the top of the dust removal and denitrification reaction device is detachably equipped with a sealing component to enclose the containing space.

[0012] Preferably, the bottom of the dust removal and denitrification reaction device is provided with a material collection device for collecting the materials after the reaction, and the bottom of the material collection device is provided with a discharge control device for controlling the discharge of materials.

[0013] Preferably, the gas input end of the dust removal and denitrification reaction device is provided with a gas introduction device for introducing the gas to be treated. The gas introduction device is connected to the dust removal and denitrification reaction device, and a mixing device for mixing the liquid raw material with the gas to be treated is provided inside the gas introduction device.

[0014] Preferably, the mixing device includes a plurality of spraying components for spraying the liquid raw material.

[0015] Preferably, the heat exchanger includes a medium inlet pipe for inputting the heat exchange medium and a medium outlet pipe for outputting the heat exchange medium, and the input end of the spraying component is connected to the output end of the medium outlet pipe through the outlet pipe.

[0016] Preferably, a support device for supporting the dust removal and denitrification reaction device is provided below the dust removal and denitrification reaction device.

[0017] Preferably, the raw material storage device is an ammonia storage tank, and the conveying device is a conveying pump connected to the ammonia storage tank. The output end of the conveying pump is connected to the input end of the medium input pipe through an input pipe.

[0018] Preferably, the dust removal component is a filter bag, the gas discharge device is an outlet pipe, the mounting component is a tube sheet for mounting the filter bag, the tube sheet is installed above the inner cavity of the accommodating space, and the denitrification reaction component is a denitrification catalyst module, which is located at the output end of the tube sheet, and the output end of the denitrification catalyst module is connected to the outlet pipe.

[0019] Preferably, the material collection device is a silo, the gas introduction device is an inlet flue, the silo is connected to the bottom of the dust removal and denitrification reaction device and is connected to the output end of the gas introduction device, and the discharge control device is a discharge valve located at the bottom of the silo.

[0020] The beneficial effects of this utility model are:

[0021] By setting up a raw material storage device, a dust removal and denitrification reaction device, and a conveying device, the raw material storage device stores the deammoniation liquid raw material, the conveying device transports the deammoniation raw material, and the dust removal and denitrification reaction device integrates dust removal components, denitrification reaction components, and a gas discharge device. The gas discharge device is equipped with a heat exchanger, realizing the integrated function of dust removal and denitrification. The raw material storage device is connected to the gas input end of the dust removal and denitrification reaction device to ensure that the liquid raw material can participate in the denitrification reaction. This utility model solves the space problem of dust removal and denitrification in the current technology through the integrated design of dust removal and denitrification functions, realizing compact installation. At the same time, the heat exchanger is used to process the liquid raw material, reducing the front-end temperature change, improving the catalyst activity efficiency, and also achieving energy saving and environmental protection, with no wastewater generation and secondary treatment costs. Attached Figure Description

[0022] Figure 1 This is the front view of this utility model;

[0023] Figure 2 This is a side view of the present invention;

[0024] The markings in the diagram are as follows:

[0025] 1. Ammonia storage tank; 2. Transfer pump; 3. Outlet pipe; 4. Heat exchanger; 5. Top cover; 6. Tube plate; 7. Denitrification catalyst module; 8. Filter bag; 9. Dust removal and denitrification reaction device; 10. Steel support; 11. Ash hopper; 12. Inlet flue; 13. Ammonia injection grid; 14. Output pipe; 15. Input pipe; 16. Discharge valve; 17. Connecting pipe. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0027] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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.

[0030] like Figure 1 and Figure 2 As shown, a flue gas denitrification and dust removal device includes:

[0031] Raw material storage device for storing liquid raw materials required for denitrification reaction;

[0032] A dust removal and denitrification reaction device 9 with a containment space;

[0033] A conveying device for conveying the liquid raw material;

[0034] The dust removal and denitrification reaction device 9 is equipped with an installation component for installing dust removal components, a denitrification reaction component, and a gas discharge device for discharging the gas after the reaction. The gas discharge device is equipped with a heat exchanger 4. The raw material storage device is connected to the gas input end of the dust removal and denitrification reaction device 9 through a conveying device.

[0035] In use, this device integrates a raw material storage device, a dust removal and denitrification reaction device 9, and a conveying device. The raw material storage device stores the ammonia removal liquid raw material, and the conveying device transports the ammonia removal raw material. The dust removal and denitrification reaction device 9 integrates dust removal components, denitrification reaction components, and a gas discharge device, and the gas discharge device is equipped with a heat exchanger 4, realizing the integrated function of dust removal and denitrification. The raw material storage device is connected to the gas input end of the dust removal and denitrification reaction device 9 to ensure that the liquid raw material can participate in the denitrification reaction. This utility model solves the space problem of dust removal and denitrification in the current technology through the integrated design of dust removal and denitrification functions, achieving compact installation. At the same time, the heat exchanger 4 is used to process the liquid raw material, reducing the front-end temperature change, improving the catalyst activity efficiency, and also achieving energy saving and environmental protection, with no wastewater generation and no secondary treatment costs.

[0036] As a preferred example of this application, the dust removal and denitrification reaction device 9 is detachably provided with a sealing component to close the containing space. The sealing component is a top cover 5, which is detachably installed on the top of the dust removal and denitrification reaction device 9 by bolts. Removing the top cover 5 allows the tube sheet 6 to be taken out from inside the dust removal and denitrification reaction device 9, which facilitates the replacement of the filter bag 8 and greatly improves the convenience of equipment maintenance.

[0037] As a preferred example of this application, the bottom of the dust removal and denitrification reaction device 9 is equipped with a material collection device for collecting materials after the reaction, and the bottom of the material collection device is equipped with a discharge control device for controlling the discharge of materials. The presence of both the material collection device and the discharge control device at the bottom of the dust removal and denitrification reaction device 9 enables timely collection of materials generated during the reaction process, such as dust, preventing material accumulation within the device and affecting normal equipment operation. The discharge control device allows for flexible control of material discharge, facilitating subsequent material processing, while maintaining cleanliness inside the device, ensuring stable dust removal and denitrification effects, and extending the equipment's service life.

[0038] As a preferred example of this application, the gas input end of the dust removal and denitrification reaction device 9 is provided with a gas introduction device for introducing the gas to be treated. The gas introduction device is connected to the dust removal and denitrification reaction device 9. The gas introduction device is provided with a mixing device for mixing the liquid raw material with the gas to be treated. The gas introduction device and the mixing device are provided at the gas input end of the dust removal and denitrification reaction device 9. The gas introduction device is used to introduce flue gas into the dust removal and denitrification reaction device 9. The mixing device can fully mix the liquid raw material with the gas to be treated, so that the denitrification reaction is more complete.

[0039] As a preferred example of this application, the mixing device includes multiple spraying components for spraying the liquid raw materials. In this embodiment, an ammonia spraying grid 13 is used, which can spray the liquid raw materials into the gas to be treated in a more uniform and dispersed state. Compared with a single spraying method, it can significantly increase the contact area between the liquid raw materials and the gas, promote the full mixing of the two, make the denitrification reaction more rapid and complete, further improve the denitrification efficiency, reduce nitrogen oxide residue, and enhance the equipment's ability and adaptability to flue gas under different operating conditions.

[0040] As a preferred example of this application, the heat exchanger 4 includes a medium input pipe 15 for inputting the heat exchange medium and a medium output pipe 14 for outputting the heat exchange medium. The input end of the spraying component is connected to the output end of the medium output pipe 14 through the output pipe 14, so that the transported liquid raw material can fully exchange heat with the heat exchange medium in the heat exchanger 4 to achieve vaporization. The vaporized raw material is evenly sprayed into the gas to be treated through the spraying component. On the one hand, the heat energy of the tail outlet pipe 3 (i.e., the flue from which the flue gas is discharged) is used to vaporize the ammonia water, reducing the temperature change at the front end and ensuring the stable progress of the denitrification reaction. On the other hand, the vaporized raw material can be more fully mixed with the flue gas, improving the efficiency of the denitrification reaction and ensuring that nitrogen oxides are effectively removed. At the same time, this rational use of heat energy also meets the requirements of energy conservation and environmental protection, reducing energy consumption and operating costs.

[0041] As a preferred example of this application, a support device for supporting the dust removal and denitrification reaction device 9 is provided below the dust removal and denitrification reaction device 9. In this embodiment, the support device is a steel bracket 10, which is installed outside the shell of the dust removal and denitrification reaction device 9 to provide stable support for the entire device and enhance the structural stability of the equipment.

[0042] As a preferred example of this application, the raw material storage device is an ammonia storage tank 1, and the conveying device is a conveying pump 2 connected to the ammonia storage tank 1. The output end of the conveying pump 2 is connected to the input end of the medium input pipe 15 through the input pipe 15.

[0043] As a preferred example of this application, the dust removal component is a filter bag 8, the gas discharge device is an outlet pipe 3, the mounting component is a tube sheet 6 for mounting the filter bag 8, the tube sheet 6 is installed above the inner cavity of the accommodating space, the denitrification reaction component is a denitrification catalyst module 7, which is set at the output end of the tube sheet 6 (the output pipe 14 of the tube sheet 6 is connected to the housing containing the denitrification catalyst module 7 through a connecting pipe 17, while the outlet pipe 3 is connected to the bottom of the housing, which is installed at the rear of the dust removal and denitrification reaction device 9), the output end of the denitrification catalyst module 7 is connected to the outlet pipe 3, the filter bag 8 is installed on the tube sheet 6, which can effectively intercept dust in the flue gas and achieve efficient dust removal; the denitrification catalyst module 7 is set at the output end of the tube sheet 6, and the flue gas after dust removal is in full contact with it, so that nitrogen oxides react with ammonia under the action of the catalyst to generate pollution-free nitrogen and water, thus completing the denitrification process; the outlet pipe 3 is connected to the denitrification catalyst module 7 to ensure that the treated clean flue gas is discharged smoothly. This structural design achieves integrated dust removal and denitrification, optimizes the flue gas treatment process, improves the space utilization of the equipment, solves the space problem of dust removal and denitrification, and ensures the dust removal and denitrification effect. In this embodiment, the denitrification catalyst module 7 can be arranged in a W-shape. The W-shaped structure extends the flow path of flue gas in the catalyst area through the bending design, allowing the flue gas to have more sufficient contact with the catalyst surface and improve the efficiency of nitrogen oxide (NOx) removal. x The reaction efficiency of ammonia (NH3) with the catalyst is improved, thereby enhancing the denitrification effect. At the same time, the W-shaped structure increases the effective arrangement area of ​​the catalyst in the limited equipment space, achieving a more compact design. It is especially suitable for integrated dust removal and denitrification equipment with high space requirements, helping to solve the problem of equipment space constraints.

[0044] As a preferred example of this application, the material collection device is a silo, the gas introduction device is an inlet flue 12, the silo is connected to the bottom of the dust removal and denitrification reaction device 9 and is connected to the output end of the gas introduction device, the discharge control device is a discharge valve 16 located at the bottom of the silo, the inlet flue 12 introduces the flue gas to be treated into the dust removal and denitrification reaction device 9, and the dust and other materials generated during the reaction fall into the silo for collection, and the discharge valve 16 at the bottom of the silo can flexibly control the discharge of materials for convenient subsequent processing.

[0045] Working Principle: In actual use, flue gas enters the desulfurization and denitrification reactor from the inlet flue 12. The flue gas first passes through the filter bag 8, where dust is blocked and falls into the ash hopper 11. After the dust is removed, the flue gas passes through the denitrification catalyst. The nitrogen oxides in the flue gas and the ammonia water storage tank 1 are pressurized by the transfer pump 2 and enter the heat exchanger 4 for heat exchange and vaporization. The ammonia gas is then injected into the inlet flue 12 through the ammonia injection grid 13 and mixed. It is then separated into pollution-free nitrogen gas and water by the denitrification catalyst. The clean flue gas enters the next process through the outlet pipe 3. At the same time, when the filter bag 8 is replaced, it is only necessary to open the top cover 5 and install and replace it through the top of the desulfurization and denitrification reactor. This process technology is simple, energy-saving and environmentally friendly. It solves the space problem of dust removal and denitrification and realizes the integrated installation design. By using the heat energy of the flue gas at the tail outlet pipe 3 to vaporize the ammonia water and inject it into the front inlet flue 12, the temperature change at the front end is reduced and the activity efficiency of the catalyst is improved. The whole process generates no wastewater and has no secondary treatment costs.

[0046] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A flue gas denitrification and dust removal device, characterized in that: include: Raw material storage device for storing liquid raw materials required for denitrification reaction; A dust removal and denitrification reaction device with a containment space (9); A conveying device for conveying the liquid raw material; The dust removal and denitrification reaction device (9) is equipped with an installation component for installing dust removal components, a denitrification reaction component, and a gas discharge device for discharging the gas after the reaction. The gas discharge device is equipped with a heat exchanger (4). The raw material storage device is connected to the gas input end of the dust removal and denitrification reaction device (9) through a conveying device.

2. The flue gas denitrification and dust removal device according to claim 1, characterized in that: The dust removal and denitrification reaction device (9) has a detachable sealing component on top to enclose the containment space.

3. The flue gas denitrification and dust removal device according to claim 2, characterized in that: The bottom of the dust removal and denitrification reaction device (9) is equipped with a material collection device for collecting the reaction material, and the bottom of the material collection device is equipped with a discharge control device for controlling the discharge of material.

4. The flue gas denitrification and dust removal device according to claim 3, characterized in that: The gas input end of the dust removal and denitrification reaction device (9) is provided with a gas introduction device for introducing the gas to be treated. The gas introduction device is connected to the dust removal and denitrification reaction device (9). The gas introduction device is provided with a mixing device for mixing the liquid raw material with the gas to be treated.

5. The flue gas denitrification and dust removal device according to claim 4, characterized in that: The mixing device includes multiple spraying components for spraying the liquid raw materials.

6. The flue gas denitrification and dust removal device according to claim 5, characterized in that: The heat exchanger (4) includes a medium input pipe (15) for inputting the heat exchange medium and a medium output pipe (14) for outputting the heat exchange medium. The input end of the spraying component is connected to the output end of the medium output pipe (14) through the output pipe (14).

7. The flue gas denitrification and dust removal device according to claim 6, characterized in that: A support device for supporting the dust removal and denitrification reaction device (9) is provided below the dust removal and denitrification reaction device (9).

8. The flue gas denitrification and dust removal device according to claim 7, characterized in that: The raw material storage device is an ammonia water storage tank (1), and the conveying device is a conveying pump (2) connected to the ammonia water storage tank (1). The output end of the conveying pump (2) is connected to the input end of the medium input pipe (15) through the input pipe (15).

9. The flue gas denitrification and dust removal device according to claim 8, characterized in that: The dust removal component is a filter bag (8), the gas discharge device is an outlet pipe (3), the installation component is a tube sheet (6) for installing the filter bag (8), the tube sheet (6) is installed above the inner cavity of the accommodating space, the denitrification reaction component is a denitrification catalyst module (7), which is set at the output end of the tube sheet (6), and the output end of the denitrification catalyst module (7) is connected to the outlet pipe (3).

10. A flue gas denitrification and dust removal device according to claim 9, characterized in that: The material collection device is a silo, the gas introduction device is an inlet flue (12), the silo is connected to the bottom of the dust removal and denitrification reaction device (9) and is connected to the output end of the gas introduction device, and the discharge control device is a discharge valve (16) located at the bottom of the silo.

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