Sintering flue gas CO catalytic combustion heat energy utilization device

Abstract

The utility model relates to a sintering flue gas CO catalytic combustion heat energy utilization device which comprises a denitration reaction tower, a denitration flue gas inlet pipe, a heat exchanger, a denitration flue gas outlet pipe, waste heat equipment, a waste heat utilization flue gas inlet pipe, a waste heat utilization flue gas outlet pipe and a chimney. The bottom of the denitration reaction tower is communicated with one end of the denitration flue gas discharge pipe, and the other end of the denitration flue gas discharge pipe is communicated with a chimney; the denitration flue gas inlet pipe is communicated with a raw flue gas side of the heat exchanger, and the denitration flue gas outlet pipe is communicated with a purified flue gas side of the heat exchanger; one end of the waste heat utilization flue gas inlet pipe is communicated with the denitration flue gas discharge pipe, the other end of the waste heat utilization flue gas inlet pipe is communicated with a flue gas inlet of the waste heat equipment, and a flue gas outlet of the waste heat equipment is communicated with the chimney through the waste heat utilization flue gas discharge pipe.

Description

Technical Field

[0001] The utility model relates to a sintering machine flue gas heat energy utilization technology in the steel industry, in particular to a sintering flue gas CO catalytic combustion heat energy utilization device. Background Art

[0002] The sintering flue gas of the steel industry contains a large amount of combustible CO components. The catalytic combustion of CO can release a large amount of heat energy, and the heat generated can be used in the flue gas denitrification system. However, the use of about 60% of the heat energy of CO catalytic combustion can meet the use of the denitrification system. More CO catalytic combustion heat energy cannot be used, resulting in a waste of heat energy, which is not in line with my country's basic national policy of energy conservation. In order to achieve energy conservation and efficiency improvement, other methods of utilizing the heat energy of CO catalytic combustion need to be considered. Utility Model Content

[0003] In order to solve one or more technical problems existing in the prior art, the utility model provides a device for utilizing heat energy of sintering flue gas CO catalytic combustion.

[0004] The utility model solves the above-mentioned technical problems with a technical solution as follows: a sintering flue gas CO catalytic combustion heat energy utilization device, comprising a denitration reaction tower, a denitration flue gas inlet pipe, a heat exchanger, a denitration flue gas exhaust pipe, waste heat equipment, a waste heat utilization flue gas inlet pipe, a waste heat utilization flue gas exhaust pipe and a chimney, wherein one end of the denitration flue gas inlet pipe is connected to the top of the denitration reaction tower, the bottom of the denitration reaction tower is connected to one end of the denitration flue gas exhaust pipe, and the other end of the denitration flue gas exhaust pipe is connected to the chimney; the denitration flue gas inlet pipe is connected to the original flue gas side of the heat exchanger, and the denitration flue gas exhaust pipe is connected to the clean flue gas side of the heat exchanger; one end of the waste heat utilization flue gas inlet pipe is connected to the denitration flue gas exhaust pipe, the other end of the waste heat utilization flue gas inlet pipe is connected to the flue gas inlet of the waste heat equipment, and the flue gas outlet of the waste heat equipment is connected to the chimney through the waste heat utilization flue gas exhaust pipe.

[0005] The beneficial effects of the utility model are as follows: the sintering flue gas CO catalytic combustion heat energy utilization device of the utility model can utilize the heat energy generated by the CO catalytic combustion for multiple purposes, that is, the CO catalytic combustion heat energy can be used to heat the low-temperature flue gas after desulfurization through a heat exchanger, and the surplus heat energy can be recovered through waste heat equipment to produce hot water, steam, etc. for use in other production sections. The sintering flue gas CO catalytic combustion heat energy utilization device of the utility model reduces CO emissions, realizes the effective recycling of resources, saves gas and energy at the same time, and has both environmental and economic benefits.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, one end of the waste heat utilization flue gas exhaust pipe is connected to the flue gas outlet of the waste heat equipment, and the other end is connected to the denitrification flue gas exhaust pipe.

[0008] Furthermore, one end of the waste heat utilization flue gas inlet pipe is connected to the denitrification flue gas exhaust pipe upstream of the heat exchanger.

[0009] Furthermore, the other end of the waste heat utilization flue gas exhaust pipe is connected to the denitrification flue gas exhaust pipe downstream of the heat exchanger.

[0010] Furthermore, the heat exchanger is any one of a GGH heat exchanger, a plate heat exchanger and a tube heat exchanger.

[0011] Furthermore, a first opening adjustment mechanism is provided on the denitrification flue gas exhaust pipe, which is located on the denitrification flue gas exhaust pipe upstream of the heat exchanger, and the connection between the waste heat utilization flue gas inlet pipe and the denitrification flue gas exhaust pipe is located upstream of the first opening adjustment mechanism.

[0012] The beneficial effect of adopting the above further solution is that the emission of flue gas after denitrification can be adjusted by setting the first opening adjustment mechanism.

[0013] Furthermore, a second opening adjustment mechanism is provided on the waste heat utilization flue gas inlet pipe.

[0014] Furthermore, a third opening adjustment mechanism is provided on the waste heat utilization flue gas exhaust pipe.

[0015] Furthermore, the denitration reaction tower is provided with multiple layers of denitration catalyst packing layers and a layer of CO catalyst packing layer.

[0016] Furthermore, the CO catalyst packing layer is located below the multi-layer denitration catalyst packing layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model of the sintering flue gas CO catalytic combustion heat energy utilization device.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Denitration reaction tower; 2. Denitration flue gas inlet pipe; 3. Heat exchanger; 4. Denitration flue gas exhaust pipe; 5. Waste heat equipment; 6. Waste heat utilization flue gas inlet pipe; 7. Waste heat utilization flue gas exhaust pipe; 8. Chimney; 9. First opening adjustment mechanism; 10. Second opening adjustment mechanism; 11. Third opening adjustment mechanism; 12. Denitration catalyst packing layer; 13. CO catalyst packing layer. DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0021] like Figure 1 As shown, a sintering flue gas CO catalytic combustion heat energy utilization device of the present embodiment includes a denitration reaction tower 1, a denitration flue gas inlet pipe 2, a heat exchanger 3, a denitration flue gas exhaust pipe 4, a waste heat equipment 5, a waste heat utilization flue gas inlet pipe 6, a waste heat utilization flue gas exhaust pipe 7 and a chimney 8, wherein one end of the denitration flue gas inlet pipe 2 is connected to the top of the denitration reaction tower 1, the bottom of the denitration reaction tower 1 is connected to one end of the denitration flue gas exhaust pipe 4, and the other end of the denitration flue gas exhaust pipe 4 is connected to the chimney 8; the denitration flue gas inlet pipe 2 is connected to the original flue gas side of the heat exchanger 3, and the denitration flue gas exhaust pipe 4 is connected to the clean flue gas side of the heat exchanger 3; one end of the waste heat utilization flue gas inlet pipe 6 is connected to the denitration flue gas exhaust pipe 4, and the other end of the waste heat utilization flue gas inlet pipe 6 is connected to the flue gas inlet of the waste heat equipment 5, and the flue gas outlet of the waste heat equipment 5 is connected to the chimney 8 through the waste heat utilization flue gas exhaust pipe 7.

[0022] like Figure 1 As shown, one end of the waste heat utilization flue gas exhaust pipe 7 of this embodiment is connected to the flue gas outlet of the waste heat equipment 5, and the other end is connected to the denitrification flue gas exhaust pipe 4.

[0023] like Figure 1 As shown, one end of the waste heat utilization flue gas inlet pipe 6 of this embodiment is connected to the denitrification flue gas exhaust pipe 4 upstream of the heat exchanger 3 .

[0024] like Figure 1 As shown, the other end of the waste heat utilization flue gas exhaust pipe 7 of this embodiment is connected to the denitrification flue gas exhaust pipe 4 downstream of the heat exchanger 3.

[0025] Preferably, the heat exchanger 3 is any one of a GGH heat exchanger, a plate heat exchanger and a tube heat exchanger.

[0026] like Figure 1 As shown, the denitrification flue gas exhaust pipe 4 of this embodiment is provided with a first opening adjustment mechanism 9, which is located on the denitrification flue gas exhaust pipe 4 upstream of the heat exchanger 3, and the connection between the waste heat utilization flue gas inlet pipe 6 and the denitrification flue gas exhaust pipe 4 is located upstream of the first opening adjustment mechanism 9. By setting the first opening adjustment mechanism, the emission of flue gas after denitrification can be adjusted. By adjusting the opening of the first opening adjustment mechanism, the amount of flue gas entering the heat exchanger is adjusted, the heat exchange efficiency of the heat exchanger is controlled, and then the flue gas temperature at the hot end outlet of the original flue gas side of the GGH heat exchanger is controlled. The first opening adjustment mechanism cannot be completely sealed, that is, flue gas enters the original flue gas side of the heat exchanger at all times.

[0027] like Figure 1 As shown, the waste heat utilization flue gas inlet pipe 6 of this embodiment is provided with a second opening adjustment mechanism 10. Figure 1 As shown, the waste heat utilization flue gas discharge pipe 7 of this embodiment is provided with a third opening adjustment mechanism 11. If the heat energy of CO catalytic combustion is insufficient, the second opening adjustment mechanism and the third opening adjustment mechanism are controlled to be fully closed, and the waste heat equipment can be separated, and the heat energy of CO catalytic combustion is all used for heating the denitrification flue gas. When the heat energy of CO catalytic combustion is sufficient, the second opening adjustment mechanism and the third opening adjustment mechanism are opened, and the opening is adjusted to control the amount of flue gas entering the waste heat equipment.

[0028] The first opening adjustment mechanism 9 , the second opening adjustment mechanism 10 and the third opening adjustment mechanism 11 may all adopt automatic baffle doors or automatic valves to adjust the opening or connect or close the channels.

[0029] like Figure 1 As shown, the denitration reaction tower 1 of this embodiment is provided with a plurality of denitration catalyst packing layers 12 and a CO catalyst packing layer 13 .

[0030] like Figure 1 As shown, the CO catalyst packing layer 13 of this embodiment is located below the multi-layer denitration catalyst packing layer 12 .

[0031] The waste heat equipment of this embodiment can be used to produce hot water, steam, etc. for use in other production processes, and the hot water can also drive non-electric air conditioning for refrigeration.

[0032] The sintering flue gas CO catalytic combustion heat energy utilization device of this embodiment can use the heat energy generated by the CO catalytic combustion for multiple purposes, that is, the CO catalytic combustion heat energy can be used to heat the low-temperature flue gas after desulfurization through a heat exchanger, and the surplus heat energy can be recovered through waste heat equipment to produce hot water, steam, etc. for use in other production sections. The utility model of a sintering flue gas CO catalytic combustion heat energy utilization device reduces CO emissions and realizes the effective recycling of resources, while saving gas and energy, and has both environmental and economic benefits.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for utilizing heat energy from catalytic combustion of sintering flue gas CO, characterized in that: It includes a denitration reaction tower, a denitration flue gas inlet pipe, a heat exchanger, a denitration flue gas outlet pipe, a waste heat device, a waste heat utilization flue gas inlet pipe, a waste heat utilization flue gas outlet pipe and a chimney, wherein one end of the denitration flue gas inlet pipe is connected to the top of the denitration reaction tower, the bottom of the denitration reaction tower is connected to one end of the denitration flue gas outlet pipe, and the other end of the denitration flue gas outlet pipe is connected to the chimney; the denitration flue gas inlet pipe is connected to the raw flue gas side of the heat exchanger, and the denitration flue gas outlet pipe is connected to the clean flue gas side of the heat exchanger; one end of the waste heat utilization flue gas inlet pipe is connected to the denitration flue gas outlet pipe, the other end of the waste heat utilization flue gas inlet pipe is connected to the flue gas inlet of the waste heat device, and the flue gas outlet of the waste heat device is connected to the chimney through the waste heat utilization flue gas outlet pipe; One end of the waste heat utilization flue gas exhaust pipe is connected to the flue gas outlet of the waste heat equipment, and the other end is connected to the denitrification flue gas exhaust pipe; one end of the waste heat utilization flue gas inlet pipe is connected to the denitrification flue gas exhaust pipe upstream of the heat exchanger; the other end of the waste heat utilization flue gas exhaust pipe is connected to the denitrification flue gas exhaust pipe downstream of the heat exchanger; The denitrification flue gas exhaust pipe is provided with a first opening adjustment mechanism, and the first opening adjustment mechanism is located on the denitrification flue gas exhaust pipe upstream of the heat exchanger, and the connection between the waste heat utilization flue gas inlet pipe and the denitrification flue gas exhaust pipe is located upstream of the first opening adjustment mechanism; the waste heat utilization flue gas inlet pipe is provided with a second opening adjustment mechanism; and the waste heat utilization flue gas exhaust pipe is provided with a third opening adjustment mechanism.

2. The device for utilizing heat energy from catalytic combustion of sintering flue gas CO according to claim 1, characterized in that: The heat exchanger is any one of a GGH heat exchanger, a plate heat exchanger and a tube heat exchanger.

3. The device for utilizing heat energy from catalytic combustion of sintering flue gas CO according to claim 1, characterized in that: The denitration reaction tower is provided with multiple denitration catalyst packing layers and a CO catalyst packing layer.

4. The device for utilizing heat energy from catalytic combustion of sintering flue gas CO according to claim 3, characterized in that: The CO catalyst packing layer is located below the multi-layer denitration catalyst packing layer.

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