Coke oven flue gas co-management equipment

Abstract

This utility model discloses a co-processing device for coke oven flue gas, belonging to the field of industrial flue gas purification. The coke oven flue gas co-processing device includes: a raw flue, a desulfurization unit, a dust removal unit, a denitrification unit, and an exhaust unit. The desulfurization unit may include multiple desulfurization components and multiple first air valve components connected in a one-to-one correspondence; the dust removal unit may include multiple dust removal components and multiple second air valve components connected in a one-to-one correspondence; and the denitrification unit may include multiple denitrification components and multiple third air valve components connected in a one-to-one correspondence. Thus, it is possible to perform maintenance on at least one of the multiple desulfurization components, multiple dust removal components, and multiple denitrification components in the coke oven flue gas co-processing device while both the coke oven and the coke oven flue gas co-processing device are operating online. Furthermore, it can reduce the scope of downtime maintenance in the coke oven flue gas co-processing device and improve the flexibility of online maintenance.

Description

Technical Field

[0001] This utility model relates to the field of industrial flue gas purification, and in particular to a co-treatment device for coke oven flue gas. Background Technology

[0002] With the development of industrial technology, the requirements for the quality of industrial waste gas emissions are becoming increasingly stringent. Coke oven flue gas, emitted during the coal combustion process, is complex in composition and produced in large quantities, posing a significant environmental impact. Coke oven flue gas is a mixed waste gas generated during the high-temperature dry distillation of coal in the coking process, mainly containing pollutants such as residual tar, sulfides, nitrogen oxides, ammonia, and particulate matter. It is characterized by high temperature, high corrosiveness, and complex composition. Coke oven flue gas co-treatment equipment is an integrated environmental protection system capable of simultaneously removing multiple pollutants. For example, it can achieve synergistic purification of coke oven flue gas through desulfurization, dust removal, and denitrification.

[0003] Currently, co-treatment equipment for coke oven flue gas can include a desulfurization reactor, a dust removal device, and a denitrification reactor connected in series. The desulfurization reactor removes acidic pollutants such as SO2 and SO3, the dust removal device removes particulate pollutants, and the denitrification reactor uses a catalyst and ammonia (NH3) to remove nitrogen oxides (NOx). X To restore.

[0004] However, the aforementioned coke oven flue gas co-treatment equipment is connected in series with the coke oven body. When the coke oven flue gas co-treatment equipment is overhauled, the coke oven must be shut down simultaneously, resulting in the interruption of coking production and disruption of production continuity. Utility Model Content

[0005] This utility model embodiment provides a co-treatment device for coke oven flue gas. The technical solution is as follows:

[0006] The coke oven flue gas co-treatment equipment includes: the original flue, desulfurization device, dust removal device, denitrification device and exhaust device connected sequentially along the flue gas flow direction;

[0007] The desulfurization device includes multiple desulfurization components and multiple first air valve components. The multiple desulfurization components are connected to the multiple first air valve components one by one, and the first air valve components are used to shut off or open the flue gas in the corresponding desulfurization components.

[0008] The dust removal device includes multiple dust removal components and multiple second air valve components. The multiple dust removal components are connected to the multiple second air valve components one by one, and the second air valve components are used to shut off or open the flue gas in the corresponding dust removal components.

[0009] The denitrification device includes multiple denitrification components and multiple third air valve components. The multiple denitrification components are connected to the multiple third air valve components one-to-one, and the third air valve components are used to shut off or open the flue gas in the corresponding denitrification components.

[0010] Optionally, any one of the first air valve components includes two desulfurization flues and two desulfurization baffles. The two desulfurization flues are respectively connected to the air inlet and air outlet of the corresponding desulfurization component, and the two desulfurization baffles are respectively installed on the two desulfurization flues.

[0011] Each of the second air valve assemblies includes two dust removal flues and two dust removal baffles. The two dust removal flues are respectively connected to the air inlet and air outlet of the corresponding dust removal assembly, and the two dust removal baffles are respectively installed on the two dust removal flues.

[0012] Each of the third air valve components includes two denitrification flues and two denitrification air baffles. The two denitrification flues are respectively connected to the air inlet and air outlet of the corresponding denitrification component, and the two denitrification air baffles are respectively installed on the two denitrification flues.

[0013] Optionally, the plurality of desulfurization components include a circulating fluidized bed absorber and a dry desulfurization reactor.

[0014] Optionally, the denitrification assembly includes a heater, an ammonia injection grid, and a denitrification reactor connected sequentially along the flue gas flow direction.

[0015] Optionally, the coke oven flue gas co-treatment equipment further includes a heat exchange device, which has a raw flue gas inlet, a raw flue gas outlet, a clean flue gas inlet, and a clean flue gas outlet;

[0016] The raw flue gas inlet of the heat exchange device is connected to the dust removal device, the raw flue gas outlet and the clean flue gas inlet of the heat exchange device are respectively connected to the two ends of the denitrification device, and the clean flue gas outlet of the heat exchange device is connected to the exhaust device.

[0017] Optionally, the smoke exhaust device includes multiple induced draft components, multiple fourth air valve components, and a chimney;

[0018] The plurality of induced draft components are connected one-to-one with the plurality of fourth air valve components, and the fourth air valve components are used to shut off or open the flue gas in the corresponding induced draft components.

[0019] All of the plurality of fourth air valve assemblies are connected to the chimney.

[0020] Optionally, any one of the fourth air valve components includes two air outlet flues and two air outlet baffles. The two air outlet flues are respectively connected to the air inlet and air outlet of the corresponding air intake component, and the two air outlet baffles are respectively installed on the two air outlet flues.

[0021] Optionally, the coke oven flue gas co-treatment equipment further includes a desulfurization by-product discharge channel and a material circulation channel;

[0022] One end of the desulfurization by-product discharge channel is connected to the dust removal device, and the other end is connected to the outside.

[0023] One end of the material circulation channel is connected to the dust removal device, and the other end is connected to the circulating fluidized bed absorption tower.

[0024] Optionally, the coke oven flue gas co-treatment equipment further includes a circulating flue;

[0025] The air inlet of the circulating flue is connected to the exhaust device, and the air outlet of the circulating flue is connected to the desulfurization device.

[0026] Optionally, the coke oven flue gas co-treatment equipment also includes an adjustable windshield;

[0027] The adjustable damper is installed on the circulating flue and is used to adjust the flow rate of flue gas in the circulating flue.

[0028] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0029] This utility model provides a co-processing device for coke oven flue gas, comprising a primary flue, a desulfurization device, a dust removal device, a denitrification device, and an exhaust device connected sequentially along the flue gas flow direction. The desulfurization device may include multiple desulfurization components and multiple first air valve components connected in a one-to-one correspondence; the dust removal device may include multiple dust removal components and multiple second air valve components connected in a one-to-one correspondence; and the denitrification device may include multiple denitrification components and multiple third air valve components connected in a one-to-one correspondence. Because the coke oven flue gas co-processing device has multiple desulfurization components, multiple dust removal components, and multiple denitrification components connected in parallel, and these components are all independently configured, maintenance of at least one of the multiple desulfurization components, multiple dust removal components, and multiple denitrification components in the coke oven flue gas co-processing device can be achieved even when both the coke oven and the coke oven flue gas co-processing device are operating online.

[0030] Furthermore, it can reduce the scope of downtime maintenance in co-treatment equipment for coke oven flue gas, eliminating the need to shut down components that are not under maintenance, thereby reducing the impact of online maintenance on normal operation and improving the flexibility of online maintenance for co-treatment equipment for coke oven flue gas. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a connection diagram of a co-treatment device for coke oven flue gas provided in an embodiment of this utility model;

[0033] Figure 2 This is a schematic diagram of the structure of a co-processing device for coke oven flue gas provided in an embodiment of this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 11. Original flue gas duct; 12. Desulfurization unit, 121. Desulfurization component, 1211. Circulating fluidized bed absorber tower, 1212. Dry desulfurization reactor, 1212. First air valve assembly, 1221. Desulfurization flue gas duct, 1222. Desulfurization windbreak, 1222. First absorbent chamber, 1213. Second absorbent chamber, 1214. Dust removal unit, 13. Dust removal component, 131. Second air valve assembly, 132. Dust removal flue gas duct, 1321. Dust removal windbreak, 1322. Denitrification unit, 14. Denitrification component, 141. Heater, 141. 1. Ammonia injection grid 1412, denitrification reactor 1413, third air valve assembly 142, denitrification flue 1421, denitrification wind baffle 1422; flue gas exhaust device 15, induced draft assembly 151, fourth air valve assembly 152, exhaust flue 1521, exhaust wind baffle 1522, chimney 153; first merging flue 16, second merging flue 17, third merging flue 18; heat exchange device 19; desulfurization by-product discharge channel 21, material circulation channel 22, circulation flue 23. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0037] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0038] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0039] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0040] As a crucial energy conversion device in the iron and steel metallurgical production process, the continuous and stable operation of the coke oven is directly related to the energy and quality balance and process safety of the entire iron and steel metallurgical production chain. During production, the coke oven converts coal into metallurgical coke through high-temperature dry distillation, simultaneously generating high-calorific-value coke oven gas. This process is characterized by strong continuity, high linkage with parameter changes in connected production equipment, and inextricable decoupling of responses. Specifically, on the one hand, the refractory lining in the coke oven forms a steady-state thermal stress field under long-term high temperatures, and sudden cooling or heating can easily cause cracking of the lining; on the other hand, coke quality is deeply tied to the blast furnace smelting cycle, and unplanned shutdowns will lead to reduced blast furnace iron production.

[0041] Due to the characteristics of high-temperature continuous process, thermodynamic sensitivity of refractory materials, and deep coupling of the production chain, the continuous and stable operation of coke ovens is particularly important. As an environmental protection device, the co-treatment equipment for coke oven flue gas needs to achieve dynamic coordinated operation with the coke oven.

[0042] However, the coking oven flue gas co-treatment equipment in the relevant technology is connected in series with the coking oven body. When the coking oven flue gas co-treatment equipment is overhauled, the coking oven needs to be shut down simultaneously, which leads to the interruption of coking production and damages the continuity of production.

[0043] This utility model provides a co-treatment device for coke oven flue gas, which can solve some or all of the technical problems in the above-mentioned related technologies.

[0044] Please refer to Figure 1 and Figure 2 , Figure 1 This is a connection diagram of a co-treatment device for coke oven flue gas provided in an embodiment of this utility model. Figure 2This is a schematic diagram of the structure of a coke oven flue gas co-treatment device provided in an embodiment of the present invention. The coke oven flue gas co-treatment device may include: a primary flue 11, a desulfurization device 12, a dust removal device 13, a denitrification device 14, and a flue gas exhaust device 15, which are connected sequentially along the flue gas flow direction. The primary flue 11 can be connected to the coke oven pipeline and is used to introduce the flue gas to be treated.

[0045] The desulfurization device 12 may include multiple desulfurization components 121 and multiple first air valve assemblies 122. Each desulfurization component 121 is connected to a corresponding first air valve assembly 122, and each first air valve assembly 122 is used to shut off or open the flue gas in its corresponding desulfurization component 121. The multiple desulfurization components 121 are connected in parallel and operate independently. Each first air valve assembly 122 can independently control the shut-off or opening of the flue gas in each of the multiple desulfurization components 121.

[0046] The dust removal device 13 may include multiple dust removal components 131 and multiple second damper assemblies 132. Each dust removal component 131 is connected to a corresponding second damper assembly 132, and each second damper assembly 132 is used to shut off or open the corresponding dust removal component 131. The multiple dust removal components 131 are connected in parallel and operate independently. The multiple second damper assemblies 132 can independently control the shut-off or opening of the flue gas in each of the multiple dust removal components 131.

[0047] The denitrification device 14 may include multiple denitrification components 141 and multiple third air valve assemblies 142. Each denitrification component 141 is connected to a corresponding third air valve assembly 142, and each third air valve assembly 142 is used to shut off or open the corresponding denitrification component 141. The multiple denitrification components 141 are connected in parallel and operate independently. The multiple third air valve assemblies 142 can independently control the shut-off or opening of the flue gas in each of the multiple denitrification components 141.

[0048] It is understood that the shut-off and turn-on in this embodiment of the present invention refer to shutting off and turning on the flue gas flowing through multiple mechanisms (such as desulfurization component 121, dust removal component 131, and denitrification component 141). The coke oven flue gas co-treatment equipment may also include a control component or a switching component for controlling the start-up or shutdown of multiple mechanisms in the coke oven flue gas co-treatment equipment.

[0049] In one exemplary implementation, such as Figure 1 and Figure 2As shown in the figure, the arrows indicate the direction of flue gas flow. The flue gas to be treated passes through multiple desulfurization components 121 connected in parallel in the desulfurization device 12 for desulfurization treatment, then enters multiple dust removal components 131 connected in parallel in the dust removal device 13 for particulate matter removal treatment, and then passes through multiple denitrification components 141 connected in parallel in the denitrification device 14 for denitrification treatment, before being discharged from the coke oven flue gas co-treatment equipment via the exhaust device 15 or flowing to a designated institution.

[0050] Because the coke oven flue gas co-treatment equipment in this embodiment of the utility model has multiple desulfurization components 121 connected in parallel, multiple dust removal components 131 connected in parallel, and multiple denitrification components 141 connected in parallel, and each component is independently configured, when any one of the multiple desulfurization components 121 malfunctions or needs maintenance, the flue gas can be desulfurized by operating the other desulfurization components 121; when any one of the multiple dust removal components 131 malfunctions or needs maintenance, the flue gas can be dusted by operating the other dust removal components 131; when any one of the multiple denitrification components 141 malfunctions or needs maintenance, the flue gas can be denitrified by operating the other denitrification components 141. In this way, it is possible to perform maintenance on at least one of the multiple desulfurization components 121, multiple dust removal components 131, and multiple denitrification components 141 in the coke oven flue gas co-treatment equipment while both the coke oven and the coke oven flue gas co-treatment equipment are operating online.

[0051] Compared to related technologies that use two identical sets of coke oven flue gas co-treatment equipment for online maintenance, this utility model embodiment integrates the desulfurization device 12, dust removal device 13, and denitrification device 14 in a modular and separate manner. Multiple components are connected in parallel to achieve independent start-up, shutdown, and online maintenance for each component. Furthermore, in this utility model embodiment, the start-up and shutdown of multiple components in the desulfurization device 12, dust removal device 13, and denitrification device 14 do not affect each other. For example, online maintenance can be performed on any desulfurization component 121, any dust removal component 131, or any denitrification component 141 according to maintenance needs. This reduces the scope of downtime maintenance in the coke oven flue gas co-treatment equipment, eliminating the need to shut down components that are not under maintenance, thereby reducing the impact of online maintenance on normal operation.

[0052] Alternatively, any one of the desulfurization components 121 and any one of the dust removal components 131 can be inspected online simultaneously, or any one of the desulfurization components 121, any one of the dust removal components 131 and any one of the denitrification components 141 can be inspected online simultaneously, which can improve the flexibility of online maintenance of the co-treatment equipment for co-processing co-treatment of coke oven flue gas.

[0053] In summary, this utility model embodiment provides a co-processing device for coke oven flue gas, comprising a primary flue duct 11, a desulfurization device 12, a dust removal device 13, a denitrification device 14, and an exhaust device 15 connected sequentially along the flue gas flow direction. The desulfurization device 12 may include multiple desulfurization components 121 and multiple first air valve components 122 connected in a one-to-one correspondence. The dust removal device 13 may include multiple dust removal components 131 and multiple second air valve components 132 connected in a one-to-one correspondence. The denitrification device 14 may include multiple denitrification components 141 and multiple third air valve components 142 connected in a one-to-one correspondence. Since the coke oven flue gas co-treatment equipment has multiple desulfurization components 121, multiple dust removal components 131, and multiple denitrification components 141 connected in parallel, and each component is set independently, it is possible to perform maintenance on at least one of the multiple desulfurization components 121, multiple dust removal components 131, and multiple denitrification components 141 in the coke oven flue gas co-treatment equipment while both the coke oven and the coke oven flue gas co-treatment equipment are running online.

[0054] Furthermore, it can reduce the scope of downtime maintenance in co-treatment equipment for coke oven flue gas, eliminating the need to shut down components that are not under maintenance, thereby reducing the impact of online maintenance on normal operation and improving the flexibility of online maintenance for co-treatment equipment for coke oven flue gas.

[0055] like Figure 1 and Figure 2 As shown, in an optional embodiment, any one of the first damper assemblies 122 may include two desulfurization flues 1221 and two desulfurization dampers 1222. The two desulfurization flues 1221 are respectively connected to the air inlet and air outlet of the corresponding desulfurization assembly 121, and the two desulfurization dampers 1222 are respectively installed on the two desulfurization flues 1221. The desulfurization dampers 1222 can shut off the desulfurization flues 1221 during maintenance or start-up / shutdown to physically isolate the desulfurization assembly 121. Any one of the second damper assemblies 132 may include two dust removal flues 1321 and two dust removal dampers 1322. The two dust removal flues 1321 are respectively connected to the air inlet and air outlet of the corresponding dust removal assembly 131, and the two dust removal dampers 1322 are respectively installed on the two dust removal flues 1321. The dust collector damper 1322 can shut off the dust collector flue 1321 during maintenance or start-up / shutdown to physically isolate the dust collector assembly 131. Any third damper assembly 142 may include two denitrification flues 1421 and two denitrification dampers 1422. The two denitrification flues 1421 are respectively connected to the air inlet and outlet of the corresponding denitrification assembly 141, and the two denitrification dampers 1422 are respectively installed on the two denitrification flues 1421. The denitrification dampers 1422 can shut off the denitrification flues 1421 during maintenance or start-up / shutdown to physically isolate the denitrification assembly 141.

[0056] The coke oven flue gas co-treatment equipment may also include a first merging flue 16, a second merging flue 17, and a third merging flue 18.

[0057] The air inlets of multiple desulfurization components 121 are connected to the original flue 11 through multiple desulfurization flues 1221, and the air outlets of multiple desulfurization components 121 are connected to the first converging flue 16 through multiple desulfurization flues 1221. The air inlets of multiple dust removal components 131 are connected to the first converging flue 16 through multiple dust removal flues 1321, and the air outlets of multiple dust removal components 131 are connected to the second converging flue 17 through multiple dust removal flues 1321. The air inlets of multiple denitrification components 141 are connected to the second converging flue 17 through multiple denitrification flues 1421, and the air outlets of multiple denitrification components 141 are connected to the third converging flue 18 through multiple denitrification flues 1421. The third converging flue 18 is also connected to the exhaust device 15.

[0058] Please refer to Figure 1 and Figure 2 In one optional embodiment, the multiple desulfurization components 121 may include a circulating fluidized bed absorber 1211 and a dry desulfurization reactor 1212. In the circulating fluidized bed absorber 1211, acidic pollutants such as SO2 and SO3 can react with added dry slaked lime powder at an appropriate temperature to remove acidic pollutants such as SO2 and SO3.

[0059] The dry desulfurization reactor 1212 includes a swirl unit and a desulfurizing agent injection unit. The swirl unit is used to form a rotating airflow, and the desulfurizing agent injection unit is located at the rear end of the swirl unit to inject desulfurizing agent to remove acidic pollutants such as SO2 and SO3.

[0060] The desulfurization assembly 121 also includes a first absorbent chamber 1213 and a second absorbent chamber 1214. The first absorbent chamber 1213 is connected to the circulating fluidized bed absorption tower 1211, and the second absorbent chamber 1214 is connected to the dry desulfurization reactor 1212.

[0061] The dust collection assembly 131 may include a bag filter for capturing particulate matter, tar droplets, heavy metals and some aerosol pollutants in flue gas.

[0062] In one optional embodiment, the denitrification assembly 141 may include a heater 1411, an ammonia injection grid 1412, and a denitrification reactor 1413 connected sequentially along the flue gas flow direction. The denitrification reactor 1413 includes an SCR reactor (Selective Catalytic Reduction Reactor), and the denitrification unit 14 utilizes a catalyst and NH3 to remove NO. XThe reduction process is carried out. Heater 1411 includes a direct-fired furnace with a built-in flue. Ammonia injection grid 1412 is installed in the connecting pipe between the SCR reactor and heater 1411.

[0063] In an optional embodiment, the coke oven flue gas co-treatment equipment may further include a heat exchange device 19, which has a raw flue gas inlet, a raw flue gas outlet, a clean flue gas inlet, and a clean flue gas outlet; the heat exchange device 19 may include a gas heat exchanger (GGH). The raw flue gas inlet of the heat exchange device 19 is connected to the dust removal device 13, the raw flue gas outlet and the clean flue gas inlet of the heat exchange device 19 are respectively connected to both ends of the denitrification device 14, and the clean flue gas outlet of the heat exchange device 19 is connected to the exhaust device 15.

[0064] In one optional embodiment, the smoke exhaust device 15 may include a plurality of induced draft assemblies 151, a plurality of fourth damper assemblies 152, and a chimney 153. The plurality of induced draft assemblies 151 are connected one-to-one with the plurality of fourth damper assemblies 152, and the fourth damper assemblies 152 are used to shut off or open the flue gas in the corresponding induced draft assembly 151; the plurality of fourth damper assemblies 152 are all connected to the chimney 153.

[0065] The induced draft assembly 151 may include an induced draft fan. Multiple induced draft assemblies 151 are connected in parallel and operate independently. Multiple fourth air valve assemblies 152 can independently control the shut-off or opening of the flue gas in the multiple induced draft assemblies 151.

[0066] In an optional embodiment, any fourth air valve assembly 152 includes two exhaust ducts 1521 and two exhaust baffles 1522. The two exhaust ducts 1521 are respectively connected to the air inlet and air outlet of the corresponding induced draft assembly 151, and the two exhaust baffles 1522 are respectively installed on the two exhaust ducts 1521. By providing exhaust baffles 1522 at the air inlet and air outlet of each induced draft fan, the dust removal assembly 131 can be physically isolated.

[0067] In this embodiment of the present invention, the number of desulfurization components 121, the number of dust removal components 131, the number of denitrification components 141, and the number of induced draft components 151 can all be 2, 3, 4, 5, or more, and this embodiment of the present invention does not limit the number of such components.

[0068] In one exemplary embodiment, the number of desulfurization components 121 is 2, the number of dust removal components 131 is 4, the number of denitrification components 141 is 3, and the number of induced draft components 151 is 2. It can be understood that, when designing the coke oven flue gas co-treatment equipment, the number of desulfurization components 121, dust removal components 131, denitrification components 141, and induced draft components 151 can be redundantly designed according to the online maintenance function of the coke oven flue gas co-treatment equipment. In this way, when any one or more components are maintained, there is no need to reduce the load of the coke oven, which can reduce the impact of online maintenance on normal production.

[0069] In an optional embodiment, the coke oven flue gas co-treatment equipment may further include a desulfurization by-product discharge channel 21 and a material circulation channel 22; one end of the desulfurization by-product discharge channel 21 is connected to the dust removal device 13, and the other end is connected to the outside; one end of the material circulation channel 22 is connected to the dust removal device 13, and the other end is connected to the circulating fluidized bed absorption tower 1211.

[0070] In an optional embodiment, the coke oven flue gas co-treatment device further includes a circulating flue 23; the inlet of the circulating flue 23 is connected to the exhaust device 15, and the outlet of the circulating flue 23 is connected to the desulfurization device 12. The inlet of the circulating flue 23 is connected to the outlet of the induced draft assembly 151, and the outlet of the circulating flue 23 is connected to the inlet of the desulfurization device 12. The circulating flue 23 can transport at least a portion of the flue gas output from the induced draft assembly 151 to the desulfurization device 12.

[0071] In one alternative embodiment, the coke oven flue gas co-treatment device may further include an adjusting damper; the adjusting damper is installed on the circulating flue duct 23 and is used to adjust the flue gas flow rate in the circulating flue duct 23.

[0072] In one exemplary implementation, please refer to Figure 1 and Figure 2 The coke oven flue gas co-treatment equipment in this embodiment of the present invention can include the following steps in treating coke oven flue gas:

[0073] (1) Coke oven flue gas enters desulfurization component 121 (circulating fluidized bed absorption tower 1211 or dry desulfurization reactor 1212) through desulfurization damper 1222. During this process, the desulfurization damper 1222 at the outlet of the desulfurization component 121 that needs to be operated can be opened, and the desulfurization damper 1222 at the outlet of the desulfurization component 121 that is in hot standby state can be closed. During this period, only one desulfurization component 121 is operated, and the other desulfurization component 121 is in hot standby or maintenance state.

[0074] (2) The flue gas after desulfurization enters the dust removal device 13. The multiple dust removal components 131 in the dust removal device 13 are independent of each other. In this process, if any dust removal component 131 fails, the dust removal windshield 1322 at the air inlet and air outlet of the dust removal component 131 will be closed to perform maintenance on the dust removal component 131.

[0075] (3) The flue gas passing through the dust removal device 13 enters the cold end of the heat exchange device 19 for heat exchange.

[0076] (4) The flue gas after heat exchange enters the denitrification device 14. The multiple denitrification components 141 in the denitrification device 14 are independent of each other. After the flue gas is heated by the heating furnace and the denitrification agent is added by the ammonia injection grid 1412, it enters the SCR reactor to carry out the denitrification reaction. During this process, if a denitrification component 141 malfunctions or needs to replace the catalyst, the denitrification wind deflector 1422 at the air inlet and air outlet of the denitrification component 141 is closed to repair the denitrification component 141.

[0077] (5) After the purified flue gas is reheated at the hot end of the heat exchange device 19, it is transported to the chimney 153 through the induced draft assembly 151. The two induced draft assemblies 151 are used and standby respectively. The hot standby of the induced draft assembly 151 is achieved by shutting off the air inlet and outlet of the induced draft assembly 151 and the air outlet baffle 1522.

[0078] It should be noted that the dimensions of the areas may have been exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element is referred to as "on top of" another element, it can be directly on the other element, or there may be intermediate elements. Additionally, it is understood that when an element is referred to as "below" another element, it can be directly below the other element, or there may be more than one intermediate element. Furthermore, it is also understood that when an element is referred to as "between" two elements, it can be the only layer between the two elements, or there may be more than one intermediate element. Similar reference numerals throughout indicate similar elements.

[0079] In this invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0080] The above description is only an optional 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 co-treatment device for coke oven flue gas, characterized in that, include: The original flue, desulfurization unit, dust removal unit, denitrification unit, and exhaust unit are connected sequentially along the flue gas flow direction; The desulfurization device includes multiple desulfurization components and multiple first air valve components. The multiple desulfurization components are connected to the multiple first air valve components one by one, and the first air valve components are used to shut off or open the flue gas in the corresponding desulfurization components. The dust removal device includes multiple dust removal components and multiple second air valve components. The multiple dust removal components are connected to the multiple second air valve components one by one, and the second air valve components are used to shut off or open the flue gas in the corresponding dust removal components. The denitrification device includes multiple denitrification components and multiple third air valve components. The multiple denitrification components are connected to the multiple third air valve components one-to-one, and the third air valve components are used to shut off or open the flue gas in the corresponding denitrification components.

2. The coke oven flue gas coordinated management equipment according to claim 1, characterized in that, Each of the first air valve components includes two desulfurization flues and two desulfurization baffles. The two desulfurization flues are respectively connected to the air inlet and air outlet of the corresponding desulfurization component, and the two desulfurization baffles are respectively installed on the two desulfurization flues. Each of the second air valve assemblies includes two dust removal flues and two dust removal baffles. The two dust removal flues are respectively connected to the air inlet and air outlet of the corresponding dust removal assembly, and the two dust removal baffles are respectively installed on the two dust removal flues. Each of the third air valve components includes two denitrification flues and two denitrification air baffles. The two denitrification flues are respectively connected to the air inlet and air outlet of the corresponding denitrification component, and the two denitrification air baffles are respectively installed on the two denitrification flues.

3. The coke oven flue gas coordinated management equipment according to claim 1, characterized in that, The multiple desulfurization components include a circulating fluidized bed absorber and a dry desulfurization reactor.

4. The coke oven flue gas coordinated management equipment according to claim 1, characterized in that, The denitrification assembly includes a heater, an ammonia injection grid, and a denitrification reactor connected sequentially along the flue gas flow direction.

5. The coke oven flue gas co-treatment equipment according to claim 1, characterized in that, The coke oven flue gas co-treatment equipment also includes a heat exchange device, which has a raw flue gas inlet, a raw flue gas outlet, a clean flue gas inlet, and a clean flue gas outlet. The raw flue gas inlet of the heat exchange device is connected to the dust removal device, the raw flue gas outlet and the clean flue gas inlet of the heat exchange device are respectively connected to the two ends of the denitrification device, and the clean flue gas outlet of the heat exchange device is connected to the exhaust device.

6. The coke oven flue gas co-treatment equipment according to claim 1, characterized in that, The smoke exhaust device includes multiple air intake components, multiple fourth air valve components, and a chimney; The plurality of induced draft components are connected one-to-one with the plurality of fourth air valve components, and the fourth air valve components are used to shut off or open the flue gas in the corresponding induced draft components. All of the multiple fourth air valve assemblies are connected to the chimney.

7. The coke oven flue gas co-treatment equipment according to claim 6, characterized in that, Each of the fourth air valve components includes two air outlet flues and two air outlet baffles. The two air outlet flues are respectively connected to the air inlet and air outlet of the corresponding air intake component, and the two air outlet baffles are respectively installed on the two air outlet flues.

8. The coke oven flue gas co-treatment equipment according to claim 3, characterized in that, The coke oven flue gas co-treatment equipment also includes a desulfurization by-product discharge channel and a material circulation channel; One end of the desulfurization by-product discharge channel is connected to the dust removal device, and the other end is connected to the outside. One end of the material circulation channel is connected to the dust removal device, and the other end is connected to the circulating fluidized bed absorption tower.

9. The coke oven flue gas co-treatment equipment according to claim 1, characterized in that, The coke oven flue gas co-treatment equipment also includes a circulating flue; The air inlet of the circulating flue is connected to the exhaust device, and the air outlet of the circulating flue is connected to the desulfurization device.

10. The coke oven flue gas co-treatment equipment according to claim 9, characterized in that, The coke oven flue gas co-treatment equipment also includes an adjustable windshield; The adjustable damper is installed on the circulating flue and is used to adjust the flow rate of flue gas in the circulating flue.

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