Integrated equipment for sintering flue gas multi-pollutant purification

Abstract

The utility model discloses a kind of sintering flue gas multi-pollutant purification integrated equipment, belong to industrial flue gas purification field.The sintering flue gas multi-pollutant purification integrated equipment includes: desulfurization device, dust removal device, heat exchange device, carbon monoxide removal device, heating device and denitration device sintering flue gas multi-pollutant purification integrated equipment, can realize the multi-process coupling of desulfurization process, carbon monoxide removal process and denitration process.And by arranging carbon monoxide removal device ground, the construction difficulty of carbon monoxide removal device can be reduced, and heat exchange device is connected with dust removal device and carbon monoxide removal device respectively using the mode of upper air inlet lower air outlet, can optimize pipeline layout, reduce the bending frequency of connecting pipeline;It can also increase the length of connecting pipeline between carbon monoxide removal device, heating device and denitration device, so that the flue gas in connecting pipeline forms stable speed distribution, so that the medium distribution of ammonia grid spray is uniform.

Description

Technical Field

[0001] This utility model relates to the field of industrial flue gas purification, and in particular to an integrated purification device for multiple pollutants in sintering 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. The sintering flue gas emitted during the steel sintering production process is complex in composition and large in volume, posing a significant environmental impact. This flue gas is characterized by high temperature, high dust levels, and the presence of multiple pollutants. The integrated multi-pollutant purification equipment for sintering flue gas combines carbon monoxide (CO) treatment technology with desulfurization and denitrification technologies. Because the catalyst in the carbon monoxide treatment process is easily affected by pollutants such as sulfur dioxide (SO2) and sulfur trioxide (SO3) in the sintering flue gas, the carbon monoxide treatment effect is unstable. Therefore, the integrated multi-pollutant purification equipment for sintering flue gas can not only remove carbon monoxide but also achieve the synergistic removal of other pollutants, thereby improving the purification effect of the sintering flue gas.

[0003] Currently, integrated multi-pollutant purification equipment for sintering flue gas can include desulfurization reactors, carbon monoxide removal reactors, hot blast stoves, and denitrification reactors. The desulfurization reactor removes acidic pollutants such as SO2 and SO3; the carbon monoxide removal reactor uses a catalytic method to remove carbon monoxide; the hot blast stove heats the flue gas entering the carbon monoxide removal reactor; and the denitrification reactor uses a catalyst and ammonia (NH3) to remove nitrogen oxides (NOx). X To restore.

[0004] However, the construction of the aforementioned integrated equipment for purifying multiple pollutants in sintering flue gas is quite difficult, and its energy utilization rate is low. Utility Model Content

[0005] This utility model embodiment provides an integrated purification device for multiple pollutants in sintering flue gas. The technical solution is as follows:

[0006] The integrated purification equipment for multiple pollutants in sintering flue gas includes:

[0007] The desulfurization device has an air inlet for introducing the flue gas to be treated;

[0008] A dust removal device, wherein the air inlet of the dust removal device is connected to the air outlet of the desulfurization device;

[0009] A heat exchange device having a raw flue gas inlet, a raw flue gas outlet, a clean flue gas inlet, and a clean flue gas outlet, wherein the raw flue gas inlet of the heat exchange device is connected to the outlet of the dust removal device, and the raw flue gas inlet is located on the side of the raw flue gas outlet away from the ground.

[0010] A carbon monoxide removal device is located on one side of the heat exchange device in the horizontal direction, and the inlet of the carbon monoxide removal device is connected to the original flue gas outlet of the heat exchange device.

[0011] A heating device, wherein the air inlet of the heating device is connected to the air outlet of the carbon monoxide removal device;

[0012] A denitrification device is located on the side of the heat exchange device away from the ground. The air inlet of the denitrification device is connected to the air outlet of the heating device, and the air outlet of the denitrification device is connected to the clean flue gas inlet of the heat exchange device.

[0013] Optionally, the sintering flue gas multi-pollutant purification integrated equipment further includes a first bypass flue;

[0014] The inlet of the first bypass flue is connected to the original flue gas outlet of the heat exchange device, and the outlet of the first bypass flue is connected to the inlet of the heating device.

[0015] Optionally, the integrated equipment for purifying multiple pollutants in sintering flue gas further includes an induced draft fan and a chimney, wherein the air inlet of the induced draft fan is connected to the clean flue gas outlet of the heat exchange device, and the air outlet of the induced draft fan is connected to the chimney.

[0016] Optionally, the integrated sintering flue gas multi-pollutant purification equipment further includes a second bypass flue.

[0017] The air inlet of the second bypass flue is connected to the air outlet of the dust removal device, and the air outlet of the second bypass flue is connected to the air inlet of the induced draft device.

[0018] Optionally, the integrated equipment for purifying multiple pollutants in sintering flue gas also includes a circulating flue.

[0019] The air inlet of the circulating flue is connected to the air outlet of the induced draft device, and the air outlet of the circulating flue is connected to the air inlet of the desulfurization device.

[0020] Optionally, both the circulating flue and the induced draft fan are located on the side of the dust removal device closest to the ground;

[0021] The chimney and the dust removal device are arranged adjacent to each other in the horizontal direction.

[0022] Optionally, the sintering flue gas multi-pollutant purification integrated equipment further includes a first mounting frame, on which both the heat exchange device and the denitrification device are mounted.

[0023] Optionally, the integrated equipment for purifying multiple pollutants in sintering flue gas also includes a power distribution device;

[0024] The power distribution device is located on the side of the dust removal device closest to the ground, and the power distribution device is electrically connected to the desulfurization device, the dust removal device, the heat exchange device, the carbon monoxide removal device, the heating device, the denitrification device, and the induced draft device.

[0025] Optionally, the sintering flue gas multi-pollutant purification integrated equipment further includes a second mounting bracket;

[0026] The dust removal device, the induced draft device, the power distribution device, and the circulating flue are all installed on the second mounting frame.

[0027] Optionally, the desulfurization device includes a desulfurization tower and an inlet flue. The outlet of the inlet flue is connected to the inlet of the desulfurization tower, and the inlet of the inlet flue is connected to the outlet of the circulating flue. The inlet of the inlet flue is located on the side of the dust removal device closest to the ground.

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

[0029] An integrated purification device for sintering flue gas containing multiple pollutants is provided, comprising a desulfurization unit, a dust removal unit, a heat exchange unit, a carbon monoxide removal unit, a heating unit, and a denitrification unit. This device allows for the pre-treatment of flue gas through desulfurization and dust removal before carbon monoxide removal, preventing acidic pollutants and other impurities in the flue gas from affecting the precious metal catalyst in the carbon monoxide removal unit. Furthermore, during flue gas treatment, the heat exchange unit enhances the utilization rate of heat released from carbon monoxide conversion and heat output from the desulfurization unit, achieving energy saving and efficiency improvement. This enables the coupling of multiple processes: desulfurization, carbon monoxide removal, and denitrification.

[0030] Furthermore, by arranging the carbon monoxide removal device close to the ground in this embodiment of the invention, the construction difficulty of the carbon monoxide removal device can be reduced. Moreover, the heat exchange device is connected to the dust removal device and the carbon monoxide removal device respectively by adopting the method of air inlet at the top and air outlet at the bottom, which can optimize the pipeline layout and reduce the number of bends in the connecting pipeline. It can also increase the length of the connecting pipeline between the carbon monoxide removal device, the heating device and the denitrification device, so that the flue gas in the connecting pipeline can form a stable velocity distribution after passing through a sufficiently long straight pipe section, thereby making the medium sprayed by the ammonia injection grid uniformly distributed. 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 an integrated purification device for multiple pollutants in sintering flue gas provided in an embodiment of this utility model;

[0033] Figure 2 This is a schematic diagram of the structure of an integrated purification device for multiple pollutants in sintering flue gas provided in an embodiment of this utility model;

[0034] Figure 3 yes Figure 2 A partial structural schematic diagram of an integrated equipment for purifying multiple pollutants in sintering flue gas is shown.

[0035] Figure 4 yes Figure 2 The diagram shows another perspective of the integrated purification equipment for sintering flue gas containing multiple pollutants.

[0036] Explanation of reference numerals in the attached figures:

[0037] Integrated equipment for multi-pollutant purification of sintering flue gas 10; desulfurization device 101, desulfurization tower 1011, inlet flue 1012; dust removal device 102, dust removal outlet flue L1; heat exchange device 103; carbon monoxide removal device 104; heating device 105; denitrification device 106, SCR reactor 1061, ammonia injection grid 1062; first bypass flue 107; induced draft device 108, induced draft fan outlet flue L2; chimney 109; second bypass flue 110; circulating flue 111; power distribution device 112; second mounting bracket 113; first mounting bracket 114; integrated dust removal area device 21; integrated denitrification area device 22. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a connection diagram of an integrated sintering flue gas multi-pollutant purification device 10 provided in an embodiment of this utility model. Figure 2 This is a schematic diagram of the structure of an integrated sintering flue gas purification device 10 provided in this embodiment of the present invention. Figure 3 yes Figure 2 The diagram shows a partial structural schematic of the integrated multi-pollutant purification equipment 10 for sintering flue gas, in which... Figure 2 This is a top view schematic diagram of the integrated multi-pollutant purification equipment 10 for sintering flue gas. Figure 3 yes Figure 2 The diagram shown is a partial structural schematic diagram of the front view of the integrated sintering flue gas purification device 10. The integrated sintering flue gas purification device 10 may include: a desulfurization device 101, a dust removal device 102, a heat exchange device 103, a carbon monoxide removal device 104, a heating device 105, and a denitrification device 106.

[0043] The desulfurization unit 101 may include a circulating fluidized bed absorber. In the desulfurization unit 101, acidic pollutants such as SO2 and SO3 can react with added dry slaked lime powder at an appropriate temperature to remove SO2, SO3, and other acidic pollutants. The dust removal unit 102 may include a bag filter, and the heat exchange unit 103 may include a gas heat exchanger (GGH). The carbon monoxide removal unit 104 may include a CO catalytic oxidation reactor, and the catalyst in the carbon monoxide removal unit 104 is a precious metal catalyst. The heating unit 105 includes a direct-fired furnace with a built-in flue. The denitrification unit 106 includes an SCR reactor 1061 (Selective Catalytic Reduction Reactor), which uses a catalyst and NH3 to remove NO. X Perform the restoration.

[0044] The desulfurization unit 101, dust removal unit 102, and heat exchange unit 103 can be sequentially connected by pipes along the flue gas flow direction. The inlet of the desulfurization unit 101 is used to introduce the flue gas to be treated; the inlet of the dust removal unit 102 is connected to the outlet of the desulfurization unit 101. Through the desulfurization unit 101 and the dust removal unit 102, pollutants such as SO2, SO3, hydrogen chloride (HCl), hydrogen fluoride (HF), heavy metal mercury, and fine dust in the flue gas to be treated can be removed, reducing the impact of flue gas pollutants on the precious metal catalyst in the carbon monoxide removal unit 104 and extending the service life of the precious metal catalyst.

[0045] The heat exchange device 103 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 103 is connected to the outlet of the dust removal device 102, and the raw flue gas inlet is located on the side of the raw flue gas outlet away from the ground.

[0046] The carbon monoxide removal device 104 is located on one side of the heat exchange device 103 in the horizontal direction, and the inlet of the carbon monoxide removal device 104 is connected to the raw flue gas outlet of the heat exchange device 103. The carbon monoxide removal device 104 can be installed close to the ground, that is, the carbon monoxide removal device 104 does not need to be raised by a mounting bracket. The heat exchange device 103 is connected to the outlet of the dust removal device 102 through the raw flue gas inlet located above, and is connected to the inlet of the carbon monoxide removal device 104 through the raw flue gas outlet located below.

[0047] The dust removal device 102 may also include a dust removal outlet flue L1. Thus, the flue gas discharged from the outlet of the dust removal device 102 can be introduced into the heat exchange device 103 via the dust removal outlet flue L1, and the flue gas after heat exchange in the heat exchange device 103 can be introduced into the ground-mounted carbon monoxide removal device 104 via the bottom outlet direction. Compared to related technologies where the carbon monoxide removal device 104 is positioned above the heat exchange device 103, and the heat exchange device 103 is connected to the dust removal device 102 and the carbon monoxide removal device 104 respectively via bottom inlet and top outlet, in this embodiment of the invention, by arranging the carbon monoxide removal device 104 on the ground, the construction difficulty of the carbon monoxide removal device 104 can be reduced. Furthermore, the top inlet and bottom outlet direction of the heat exchange device 103, which is connected to the dust removal device 102 and the carbon monoxide removal device 104 respectively, optimizes the pipeline layout and reduces the number of bends in the connecting pipelines.

[0048] The air inlet of the heating device 105 is connected to the air outlet of the carbon monoxide removal device 104; the heating device 105 is used to heat the flue gas entering the denitrification device 106.

[0049] The denitrification device 106 is located on the side of the heat exchange device 103 away from the ground. The air inlet of the denitrification device 106 is connected to the air outlet of the heating device 105, and the air outlet of the denitrification device 106 is connected to the clean flue gas inlet of the heat exchange device 103. The denitrification device 106 may include an SCR reactor 1061 and an ammonia injection grid 1062. The SCR reactor 1061 is located above the heat exchange device 103, and the ammonia injection grid 1062 is installed in the connecting pipe between the SCR reactor 1061 and the heating device 105.

[0050] Since the carbon monoxide removal device 104 needs to convert CO using a catalytic method at a certain temperature and can release heat during the conversion process, the carbon monoxide removal device 104 is placed between the heat exchange device 103 and the denitrification device 106 along the flue gas flow direction. The flue gas flowing from the outlet of the denitrification device 106 into the clean flue gas inlet of the heat exchange device 103 can exchange heat in the heat exchange device 103, transferring the heat to the flue gas about to enter the carbon monoxide removal device 104. In this way, the heat exchange device 103 can raise the temperature of the flue gas output from the dust removal device 102 to the preset temperature to meet the temperature requirements of the catalytic CO conversion. The heat released during the CO conversion process can heat the flue gas, thereby reducing the load on the heating device 105 located at the front end of the denitrification device 106.

[0051] Furthermore, in related technologies, the carbon monoxide removal device 104, heating device 105, and denitrification device 106 are all arranged above the heat exchange device 103. This results in a relatively short connecting pipe between the carbon monoxide removal device 104, heating device 105, and denitrification device 106, making it difficult to form a sufficiently developed flow field. Consequently, the medium sprayed from the ammonia injection grid 1062 in the denitrification device 106 is unevenly distributed. In this embodiment of the present invention, by placing the carbon monoxide removal device 104 close to the ground, placing the heating device 105 above the carbon monoxide removal device 104, and arranging the denitrification device 106 above the heat exchange device 103, the length of the connecting pipe between the carbon monoxide removal device 104, heating device 105, and denitrification device 106 can be increased. This allows the flue gas in the connecting pipe to form a stable velocity distribution after passing through a sufficiently long straight pipe section, thereby ensuring a uniform distribution of the medium sprayed from the ammonia injection grid 1062.

[0052] In one exemplary implementation, such as Figure 1As shown in the diagram, the arrows indicate the direction of flue gas flow. After passing through the desulfurization unit 101, the flue gas enters the dust removal unit 102. The flue gas output from the outlet of the dust removal unit 102 flows downward through the heat exchange unit 103 for primary heat exchange, then passes through the carbon monoxide removal unit 104 for reaction, and then through the heating unit 105 for heating and the ammonia injection treatment by the ammonia injection grid 1062. After that, the flue gas enters the SCR reactor 1061 for reaction, and then returns to the heat exchange unit 103 for secondary heat exchange before exiting the heat exchange unit 103.

[0053] In summary, this utility model embodiment provides an integrated multi-pollutant purification device 10 for sintering flue gas, comprising a desulfurization device 101, a dust removal device 102, a heat exchange device 103, a carbon monoxide removal device 104, a heating device 105, and a denitrification device 106. It allows for the desulfurization and dust removal of the flue gas before carbon monoxide removal, preventing acidic pollutants and other impurities in the flue gas from affecting the precious metal catalyst in the carbon monoxide removal device 104. Furthermore, during flue gas treatment, the heat exchange device 103 enhances the utilization rate of the heat released from carbon monoxide conversion and the heat output from the desulfurization device 101, achieving energy saving and efficiency improvement. This enables the coupling of multiple processes, including desulfurization, carbon monoxide removal, and denitrification.

[0054] Furthermore, by arranging the carbon monoxide removal device 104 close to the ground in this embodiment of the invention, the construction difficulty of the carbon monoxide removal device 104 can be reduced. Moreover, the heat exchange device 103 is connected to the dust removal device 102 and the carbon monoxide removal device 104 respectively by adopting an air inlet at the top and air outlet at the bottom, which can optimize the pipeline layout and reduce the number of bends in the connecting pipeline. It can also increase the length of the connecting pipeline between the carbon monoxide removal device 104, the heating device 105 and the denitrification device 106, so that the flue gas in the connecting pipeline can form a stable velocity distribution after passing through a sufficiently long straight pipe section, thereby making the medium sprayed by the ammonia injection grid 1062 evenly distributed.

[0055] Please refer to Figure 1 , Figure 2 and Figure 3 In an optional embodiment, the integrated multi-pollutant purification device 10 for sintering flue gas may further include a first bypass flue 107. The inlet of the first bypass flue 107 is connected to the original flue gas outlet of the heat exchange device 103, and the outlet of the first bypass flue 107 is connected to the inlet of the heating device 105. The first bypass flue 107 may be connected in parallel with the carbon monoxide removal device 104. Since the concentration of carbon monoxide in the flue gas to be treated is affected by the upstream sintering host process, the flue gas after desulfurization and dust removal can directly enter the denitrification device 106 through the first bypass flue 107, which can reduce equipment energy consumption, depending on the changes in flue gas operating conditions. When the original concentration of carbon monoxide in the flue gas to be treated is low and meets the emission requirements, the flue gas can directly enter the denitrification device 106 through the first bypass flue 107.

[0056] Please refer to Figure 1 , Figure 2 and Figure 4 , Figure 4 yes Figure 2 The diagram shown is a structural schematic from another perspective of the integrated multi-pollutant purification device 10 for sintering flue gas. Figure 4 for Figure 2 The right view of the integrated multi-pollutant purification device 10 for sintering flue gas shown illustrates an optional embodiment where the device may further include an induced draft fan 108 and a chimney 109. The inlet of the induced draft fan 108 is connected to the clean flue gas outlet of the heat exchange device 103, and the outlet of the induced draft fan 108 is connected to the chimney 109. The induced draft fan 108 may include an induced draft fan. The treated flue gas discharged from the clean flue gas outlet of the heat exchange device 103 can enter the chimney 109 under the drive of the induced draft fan 108.

[0057] In an optional embodiment, the integrated multi-pollutant purification device 10 for sintering flue gas may further include a second bypass flue 110; the inlet of the second bypass flue 110 is connected to the outlet of the dust removal device 102, and the outlet of the second bypass flue 110 is connected to the inlet of the induced draft device 108. Depending on the flue gas operating conditions, when the initial concentrations of carbon monoxide and nitrogen oxides in the flue gas to be treated are low and meet emission requirements, the flue gas after desulfurization and dust removal can be directly discharged through the second bypass flue 110. This reduces system operating resistance and operating costs.

[0058] Please refer to Figure 1 and Figure 4 In an optional embodiment, the integrated multi-pollutant purification device 10 for sintering flue gas may further include a circulating flue 111; the inlet of the circulating flue 111 is connected to the outlet of the induced draft fan 108, and the outlet of the circulating flue 111 is connected to the inlet of the desulfurization device 101. The circulating flue 111 can transport at least a portion of the flue gas output from the induced draft fan 108 to the desulfurization device 101.

[0059] Please refer to Figure 1 , Figure 2 and Figure 4 In one alternative embodiment, the circulating flue 111 and the induced draft device 108 are both located on the side of the dust removal device 102 closest to the ground; the chimney 109 and the dust removal device 102 are arranged adjacent to each other in the horizontal direction.

[0060] Optionally, the sintering flue gas multi-pollutant purification integrated equipment 10 also includes a power distribution device 112; the power distribution device 112 is located on the side of the dust removal device 102 near the ground, and the power distribution device 112 is electrically connected to the desulfurization device 101, the dust removal device 102, the heat exchange device 103, the carbon monoxide removal device 104, the heating device 105, the denitrification device 106 and the induced draft device 108.

[0061] Optionally, the sintering flue gas multi-pollutant purification integrated equipment 10 also includes a second mounting frame 113; the dust removal device 102, the induced draft device 108, the power distribution device 112 and the circulating flue 111 are all installed on the second mounting frame 113.

[0062] The dust removal device 102, the circulating flue 111, and the induced draft fan 108 can all be located below the dust removal device 102. By mounting the dust removal device 102, the induced draft fan 108, the power distribution device 112, and the circulating flue 111 on the second mounting frame 113, a dust removal area integrated device 21 can be formed. The induced draft fan 108 may also include an induced draft fan lifting mechanism, which can also be mounted on the second mounting frame 113, reducing the volume and cost of related civil engineering foundations and steel frames. By arranging the chimney 109 close to the dust removal device 102, the length of the connecting pipe between the air outlet of the induced draft fan 108 and the chimney 109 can be shortened. At the same time, the stairs on the second mounting frame 113 can be shared by the dust removal device 102 and the chimney 109, further simplifying the structure of the sintering flue gas multi-pollutant purification integrated equipment 10.

[0063] Please refer to Figure 1 , Figure 2 and Figure 4 In an optional embodiment, the desulfurization device 101 may include a desulfurization tower 1011 and an inlet flue 1012. The outlet of the inlet flue 1012 is connected to the inlet of the desulfurization tower 1011, and the inlet of the inlet flue 1012 is connected to the outlet of the circulating flue 111. The inlet of the inlet flue 1012 is located on the side of the dust removal device 102 closest to the ground. The induced draft fan 108 can be connected to the chimney 109 through the induced draft fan outlet flue L2. The induced draft fan outlet flue L2 can also be located on the side of the dust removal device 102 closest to the ground. This reduces the length of the circulating flue 111, and the circulating flue 111 can share the second mounting frame 113 with the dust removal device 102, simplifying the structure of the integrated multi-pollutant purification equipment 10 for sintering flue gas. The second mounting frame 113 may include a steel structure frame, and the inlet of the inlet flue 1012 can also be used to introduce the flue gas to be treated.

[0064] Please refer to Figure 1 and Figure 3The sintering flue gas multi-pollutant purification integrated equipment 10 may also include a first mounting frame 114, on which the heat exchange device 103 and the denitrification device 106 are both mounted.

[0065] The first mounting frame 114 may include a steel structure frame, which can integrate the heat exchange device 103, the carbon monoxide removal device 104 and the denitrification device 106, the connecting pipes between the three and the first bypass flue 107 to form a denitrification zone integrated device 22, which can reduce the floor space of the sintering flue gas multi-pollutant purification integrated equipment 10 and reduce the arrangement height of the carbon monoxide removal device 104 and the denitrification device 106.

[0066] Furthermore, by sharing a steel frame, the maintenance and repair channels of each structure can be interconnected, which can improve the convenience of maintenance.

[0067] It is understood that in this embodiment of the utility model, multiple valves may be included, and multiple valves may be installed on multiple connecting pipes to realize the opening and closing of different connecting pipes according to the flue gas conditions.

[0068] In one exemplary implementation, please refer to Figure 1 The sintering flue gas multi-pollutant purification integrated equipment 10 in this embodiment of the present invention can treat sintering flue gas in the following steps:

[0069] (1) The flue gas to be treated enters the desulfurization device 101 through the inlet of the desulfurization device 101. The desulfurization device 101 performs desulfurization treatment on the flue gas to remove SO2, SO3 and other substances from the flue gas.

[0070] (2) The flue gas after desulfurization enters the dust removal device 102 to remove dust.

[0071] (3) The flue gas passing through the dust removal device 102 enters the heat exchange device 103 for heat exchange through the top air intake;

[0072] (4) The flue gas after heat exchange enters the carbon monoxide removal device 104 for CO removal treatment;

[0073] (5) After CO removal, the flue gas is heated in a heating furnace and a denitrification agent is added to the ammonia injection grid 1062 before entering the SCR reactor 1061 to carry out the denitrification reaction and generate purified flue gas.

[0074] (6) After the purified flue gas is reheated by the heat exchanger 103, it is transported to the chimney 109 by the induced draft device 108.

[0075] Understandably, depending on the content of pollutants in the flue gas to be treated, some or all of the above steps can be selectively performed.

[0076] 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.

[0077] In this invention, the terms "first" and "second" 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.

[0078] 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. An integrated purification device for multiple pollutants in sintering flue gas, characterized in that, include: The desulfurization device has an air inlet for introducing the flue gas to be treated; A dust removal device, wherein the air inlet of the dust removal device is connected to the air outlet of the desulfurization device; A heat exchange device having a raw flue gas inlet, a raw flue gas outlet, a clean flue gas inlet, and a clean flue gas outlet, wherein the raw flue gas inlet of the heat exchange device is connected to the outlet of the dust removal device, and the raw flue gas inlet is located on the side of the raw flue gas outlet away from the ground. A carbon monoxide removal device is located on one side of the heat exchange device in the horizontal direction, and the inlet of the carbon monoxide removal device is connected to the original flue gas outlet of the heat exchange device. A heating device, wherein the air inlet of the heating device is connected to the air outlet of the carbon monoxide removal device; A denitrification device is located on the side of the heat exchange device away from the ground. The air inlet of the denitrification device is connected to the air outlet of the heating device, and the air outlet of the denitrification device is connected to the clean flue gas inlet of the heat exchange device.

2. The integrated purification equipment for multiple pollutants in sintering flue gas according to claim 1, characterized in that, The integrated equipment for purifying multiple pollutants in sintering flue gas also includes a first bypass flue. The inlet of the first bypass flue is connected to the original flue gas outlet of the heat exchange device, and the outlet of the first bypass flue is connected to the inlet of the heating device.

3. The integrated purification equipment for multiple pollutants in sintering flue gas according to claim 2, characterized in that, The integrated equipment for purifying multiple pollutants in sintering flue gas also includes an induced draft fan and a chimney. The air inlet of the induced draft fan is connected to the clean flue gas outlet of the heat exchange device, and the air outlet of the induced draft fan is connected to the chimney.

4. The integrated purification equipment for sintering flue gas with multiple pollutants according to claim 3, characterized in that, The integrated equipment for purifying multiple pollutants in sintering flue gas also includes a second bypass flue. The air inlet of the second bypass flue is connected to the air outlet of the dust removal device, and the air outlet of the second bypass flue is connected to the air inlet of the induced draft device.

5. The integrated purification equipment for multiple pollutants in sintering flue gas according to claim 3, characterized in that, The integrated equipment for purifying multiple pollutants in sintering flue gas also includes a circulating flue. The air inlet of the circulating flue is connected to the air outlet of the induced draft device, and the air outlet of the circulating flue is connected to the air inlet of the desulfurization device.

6. The integrated purification equipment for multiple pollutants in sintering flue gas according to claim 5, characterized in that, Both the circulating flue and the induced draft device are located on the side of the dust removal device closest to the ground; The chimney and the dust removal device are arranged adjacent to each other in the horizontal direction.

7. The integrated purification equipment for multiple pollutants in sintering flue gas according to claim 5, characterized in that, The integrated equipment for purifying multiple pollutants in sintering flue gas also includes a first mounting frame, on which both the heat exchange device and the denitrification device are mounted.

8. The integrated purification equipment for sintering flue gas with multiple pollutants according to claim 5, characterized in that, The integrated equipment for purifying multiple pollutants in sintering flue gas also includes a power distribution device. The power distribution device is located on the side of the dust removal device closest to the ground, and the power distribution device is electrically connected to the desulfurization device, the dust removal device, the heat exchange device, the carbon monoxide removal device, the heating device, the denitrification device, and the induced draft device.

9. The integrated purification equipment for sintering flue gas with multiple pollutants according to claim 8, characterized in that, The integrated equipment for purifying multiple pollutants in sintering flue gas also includes a second mounting frame; The dust removal device, the induced draft device, the power distribution device, and the circulating flue are all installed on the second mounting frame.

10. The integrated purification equipment for multiple pollutants in sintering flue gas according to claim 5, characterized in that, The desulfurization device includes a desulfurization tower and an inlet flue. The outlet of the inlet flue is connected to the inlet of the desulfurization tower, and the inlet of the inlet flue is connected to the outlet of the circulating flue. The inlet of the inlet flue is located on the side of the dust removal device closest to the ground.

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