CN212039806U - Oxidation method denitration treatment device - Google Patents
Oxidation method denitration treatment device Download PDFInfo
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- CN212039806U CN212039806U CN202020194019.5U CN202020194019U CN212039806U CN 212039806 U CN212039806 U CN 212039806U CN 202020194019 U CN202020194019 U CN 202020194019U CN 212039806 U CN212039806 U CN 212039806U
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Abstract
The utility model discloses an oxidation process denitration treatment device, it includes wet flue gas desulfurization tower and along exhaust gas flow direction interval arrangement's first oxidation district, first absorption region, second oxidation region and second absorption region in proper order. The utility model discloses in through setting up first oxidation zone, first absorption zone, the mode in second oxidation zone and second absorption zone, utilize ozone and liquid catalyst's oxidation behavior promptly, with the easy absorptive form of high valence state of NO oxidation in the flue gas, the alkaline characteristic of recycle desulfurizer carries out the coprocessing method of desulfurization and denitration, realize the function of integration, and carry out the transformation of small range to original desulfurizing tower, can be fine use the desulfurization and denitration of sintering flue gas on, realize the requirement of ultralow emission, the degree of difficulty and the cost of operation of transformation have also been reduced.
Description
Technical Field
The utility model relates to an environmental protection equipment technical field is administered to the flue gas, especially relates to an oxidation method denitration treatment device.
Background
The smoke pollutants of the head of the sintering machine are important pollutant sources in metallurgical waste gas, in recent years, the nation pays particular attention to the pollutant treatment in the field of metallurgy, sulfur oxides, nitrogen oxides, particulate matters and the like are generated in the production process of the sintering machine, the environment of our life is seriously harmed, and the problems of acid rain, haze and the like are frequent. In order to deal with the environmental impact caused by the production of the sintering machine, the national environmental protection department issues a guide standard for the flue gas treatment of the head of the sintering machine, wherein the treatment requirement is further strict, the guide standard makes clear requirements on the emission concentration of pollutants in the flue gas of the head of the sintering machine, and ultralow emission limit values are implemented for an environment sensitive area, namely NOx in the flue gas is less than 50mg/m3, SO2 is less than 35mg/m3, and particulate matters are less than 10mg/m 3. Most sintering machines have all been disposed wet flue gas desulfurization at present, add denitrification facility on this basis, some directly reform transform original wet flue gas desulfurization into dry flue gas desulfurization, join in marriage the SCR denitration, but this kind of technology needs to carry out the heat transfer to the flue gas and heaies up, need consume a large amount of gas as the heat source of heating flue gas, and the running cost is high, and the maintenance degree of difficulty is big.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's defect and not enough, provide an utilize the oxidant series connection denitration of multiform, NOx in the coprocessing flue gas realizes the oxidation method denitration treatment device of SOx/NOx control integration.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides an oxidation process denitration treatment device, including wet flue gas desulfurization tower and along the first oxidation district, first absorption district, second oxidation district and the second absorption district of exhaust gas flow direction interval arrangement in proper order, the upper portion and the lower part of wet flue gas desulfurization tower are provided with exhaust outlet and waste gas import respectively, first oxidation district includes to passing through the waste gas of waste gas import carries out oxidation treatment's ozone generator, first absorption district is including the desulfurization liquid source, first desulfurization liquid delivery pump and the first desulfurization liquid shower that connect gradually, first desulfurization liquid shower is located in the wet flue gas desulfurization tower, the second oxidation district is including the liquid oxidant storage tank, oxidant feed pump and the oxidant shower that connect gradually, the oxidant shower is located in the wet flue gas desulfurization tower, the second absorption district is including connecting gradually the desulfurization liquid source, The second desulfurization liquid conveying pump and the second desulfurization liquid spray pipe are positioned in the wet desulfurization tower.
Preferably, the waste gas inlet is connected with a waste gas source through an air inlet pipeline, the ozone generator is communicated with the air inlet pipeline, and a gap is formed between the connection part and the waste gas inlet.
Preferably, the desulfurization solution source comprises an external desulfurization solution source and/or an internal desulfurization solution source, and when the desulfurization solution source is only the external desulfurization solution source, the first desulfurization solution delivery pump and the second desulfurization solution delivery pump are respectively communicated with the external desulfurization solution source; when the desulfurization solution source is only an inner desulfurization solution source, the inner desulfurization solution source is arranged at the bottom of an inner cavity of the wet desulfurization tower, and the first desulfurization solution delivery pump and the second desulfurization solution delivery pump are respectively communicated with the inner desulfurization solution source; when an external desulfurization liquid source and an internal desulfurization liquid source exist simultaneously, the first desulfurization liquid delivery pump and the second desulfurization liquid delivery pump are respectively communicated with the internal desulfurization liquid source, the external desulfurization liquid source is communicated with the internal desulfurization liquid source, or the first desulfurization liquid delivery pump and the second desulfurization liquid delivery pump are respectively communicated with the external desulfurization liquid source and the internal desulfurization liquid source, the external desulfurization liquid source is communicated with the internal desulfurization liquid source, or the first desulfurization liquid delivery pump and the second desulfurization liquid delivery pump are respectively communicated with the internal desulfurization liquid source and the external desulfurization liquid source, and the external desulfurization liquid source is communicated with the internal desulfurization liquid source.
Preferably, the spray ports of the first desulfurization solution spray pipe, the oxidant spray pipe and the second desulfurization solution spray pipe are all arranged downwards; the spraying areas of the first desulfurization solution spraying pipe, the oxidant spraying pipe and the second desulfurization solution spraying pipe cover the flowing area of the waste gas in the wet desulfurization tower.
Preferably, the second oxidation area further comprises an oxidant liquid accumulating tank, the oxidant liquid accumulating tank is arranged opposite to the spraying port of the oxidant spraying pipe, the opening area of the oxidant liquid accumulating tank is not smaller than the spraying area of the oxidant spraying pipe, a gap for waste gas to flow is formed between the oxidant liquid accumulating tank and the inner wall of the wet desulphurization tower, and the oxidant liquid accumulating tank is communicated with the liquid oxidant storage tank.
Preferably, an oxidant guide plate is arranged on the inner wall of the wet desulphurization tower, the oxidant guide plate is positioned above the oxidant liquid collecting tank, and a gap for waste gas to circulate is formed between the oxidant guide plate and the oxidant liquid collecting tank.
Preferably, the oxidant guide plate comprises an oxidant lower inclined plate and an oxidant upper inclined plate which are connected at an angle less than 180 °, the oxidant lower inclined plate and the oxidant upper inclined plate are both connected with the inner wall of the wet desulphurization tower, and a gap for waste gas to flow through is formed between the oxidant upper inclined plate and the oxidant liquid collecting tank.
Preferably, the second absorption area further comprises a desulfurization solution accumulation tank, the desulfurization solution accumulation tank is arranged opposite to the spray opening of the desulfurizer spray pipe, the opening area of the desulfurization solution accumulation tank is not smaller than the spray area of the desulfurizer spray pipe, a gap for waste gas to flow through is formed between the desulfurization solution accumulation tank and the inner wall of the wet desulfurization tower, and the desulfurization solution accumulation tank is communicated with the desulfurization solution source.
Preferably, a desulfurizer guide plate is arranged on the inner wall of the wet desulphurization tower, the desulfurizer guide plate is positioned above the desulphurization solution liquid accumulation tank, and a gap for waste gas circulation is formed between the desulfurizer guide plate and the desulphurization solution liquid accumulation tank.
Preferably, the desulfurizer guide plate comprises a lower desulfurizer inclined plate and an upper desulfurizer inclined plate which are connected at an angle smaller than 180 degrees, the lower desulfurizer inclined plate and the upper desulfurizer inclined plate are both connected with the inner wall of the wet desulfurization tower, and a gap for waste gas circulation is formed between the upper desulfurizer inclined plate and the desulfurizer liquid accumulation tank.
The utility model discloses following beneficial effect has been gained for prior art:
the utility model provides an among the oxidation process denitration treatment device through setting up first oxidation district, first absorption district, the mode in second oxidation district and second absorption district, utilize ozone and liquid catalyst's oxidation property promptly, with the easy absorptive form of high valence state of NO oxidation in the flue gas, the alkaline characteristic of recycle desulfurizer carries out the coprocessing of desulfurization and denitration, realize the function of integration, and carry out the transformation of small range to original desulfurizing tower, can be fine use on the SOx/NOx control of sintering flue gas, realize the requirement of ultralow emission, the degree of difficulty of reforming transform and the cost of operation have also been reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a process flow diagram of the oxidation denitration treatment device of the utility model;
wherein, 1, an ozone generator; 2. a wet desulfurization tower; 3. a first desulfurization liquid delivery pump; 4. a liquid oxidant storage tank; 5. an oxidant supply pump; 6. an oxidant liquid accumulating tank; 7. a desulfurizing liquid collecting tank; 8. a second desulfurization liquid delivery pump; 9. a first desulfurization liquid spray pipe; 10. an oxidant spray pipe; 11. a second desulfurization solution spray pipe; 12. an oxidant deflector; 13. a desulfurizer flow guide plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
An object of the utility model is to prior art's defect and not enough, provide an utilize the oxidant series connection denitration of multiform, NOx in the coprocessing flue gas realizes the oxidation method denitration treatment device of SOx/NOx control integration.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the utility model provides an oxidation process denitration treatment device, including wet flue gas desulfurization tower 2 and along the first oxidation district of waste gas flow direction interval arrangement in proper order, first absorption district, second oxidation district and second absorption district, the upper portion and the lower part of wet flue gas desulfurization tower 2 are provided with exhaust outlet and waste gas import respectively, first oxidation district includes the ozone generator 1 that carries out oxidation treatment to the waste gas through the waste gas import, first absorption district is including the desulfurization liquid source that connects gradually, first desulfurization liquid delivery pump 3 and first desulfurization liquid shower 9, first desulfurization liquid shower 9 is located wet flue gas desulfurization tower 2, the second oxidation district is including the liquid oxidant storage tank 4 that connects gradually, oxidant feed pump 5 and oxidant shower 10, oxidant shower 10 is located wet flue gas desulfurization tower 2, the second absorption district is including the desulfurization liquid source that connects gradually, A second desulfurization liquid delivery pump 8 and a second desulfurization liquid spray pipe 11, wherein the second desulfurization liquid spray pipe 11 is positioned in the wet desulfurization tower 2.
The utility model discloses well waste gas import is connected with the waste gas source through air inlet pipeline, and ozone generator 1 is linked together with air inlet pipeline, and has the interval between junction and the waste gas import to improve the mixed degree of ozone and waste gas, reinforcing oxidation effect.
The utility model discloses middle desulfurization liquid source includes outer desulfurization liquid source and/or interior desulfurization liquid source, when only outer desulfurization liquid source, first desulfurization liquid delivery pump 3 and second desulfurization liquid delivery pump 8 are linked together with outer desulfurization liquid source respectively; when the desulfurization solution source is only the inner desulfurization solution source, the inner desulfurization solution source is arranged at the bottom of the inner cavity of the wet desulfurization tower 2, and the first desulfurization solution delivery pump 3 and the second desulfurization solution delivery pump 8 are respectively communicated with the inner desulfurization solution source; when an external desulfurization liquid source and an internal desulfurization liquid source exist simultaneously, the first desulfurization liquid delivery pump 3 and the second desulfurization liquid delivery pump 8 are respectively communicated with the internal desulfurization liquid source, the external desulfurization liquid source is communicated with the internal desulfurization liquid source, or the first desulfurization liquid delivery pump 3 and the second desulfurization liquid delivery pump 8 are respectively communicated with the external desulfurization liquid source and the internal desulfurization liquid source, the external desulfurization liquid source is communicated with the internal desulfurization liquid source, or the first desulfurization liquid delivery pump 3 and the second desulfurization liquid delivery pump 8 are respectively communicated with the internal desulfurization liquid source and the external desulfurization liquid source, and the external desulfurization liquid source is communicated with the internal desulfurization liquid source. When the inner desulfurization liquid source is arranged, the position of the waste gas inlet is higher than the liquid level of the inner desulfurization liquid source.
In the utility model, the spray ports of the first desulfurization liquid spray pipe 9, the oxidant spray pipe 10 and the second desulfurization liquid spray pipe 11 are all arranged downwards; the spraying areas of the first desulfurization solution spraying pipe 9, the oxidant spraying pipe 10 and the second desulfurization solution spraying pipe 11 cover the flow area of the exhaust gas in the wet desulfurization tower 2.
The utility model discloses well second oxidation zone still includes oxidant long-pending cistern 6, oxidant long-pending cistern 6 is fixed in wet flue gas desulfurization tower 2 (can directly be connected with the inner wall, also can be through other connected mode fixed connection, do not specifically prescribe a limit to), oxidant long-pending cistern 6 sets up with the spraying mouth of oxidant shower 10 relatively, the open area of oxidant long-pending cistern 6 is not less than the area that sprays of oxidant shower 10, and there is the clearance that supplies the exhaust gas circulation between the inner wall of oxidant long-pending cistern 6 and wet flue gas desulfurization tower 2, oxidant long-pending cistern 6 is linked together with liquid oxidant storage tank 4.
The utility model discloses be provided with oxidant guide plate 12 on the inner wall of well wet flue gas desulfurization tower 2 (oxidant guide plate 12 can with oxidant long-pending cistern 6 integrated into one piece, form the structure as shown in the figure to set up the hole that supplies the exhaust gas circulation between oxidant guide plate 12 and oxidant long-pending cistern 6), oxidant guide plate 12 is located the top of oxidant long-pending cistern 6, and has the clearance that supplies the exhaust gas circulation between oxidant guide plate 12 and the oxidant long-pending cistern 6.
The utility model discloses well oxidant guide plate 12 is including being less than 180 degrees oxidant that the angle is connected down hang plate and oxidant upper slope plate (go up the hang plate and play the effect to middle part water conservancy diversion waste gas), and the hang plate all is connected with wet flue gas desulfurization tower 2's inner wall on hang plate and the oxidant under the oxidant, and there is the clearance that supplies the exhaust gas circulation on the oxidant between hang plate and the oxidant collecting tank 6.
The utility model discloses well second absorption zone still includes doctor solution ponding groove 7, doctor solution ponding groove 7 is fixed in wet flue gas desulfurization tower 2 (can directly be connected with the inner wall, also can be through other connected mode fixed connection, do not specifically prescribe a limit to), doctor solution ponding groove 7 sets up with the spraying mouth of desulfurizer shower relatively, doctor solution ponding groove 7's open area is not less than the area that sprays of desulfurizer shower, and there is the clearance that supplies the waste gas circulation between doctor solution ponding groove 7 and wet flue gas desulfurization tower 2's the inner wall, doctor solution ponding groove 7 is linked together with the doctor solution source.
The utility model discloses be provided with desulfurizer guide plate 13 on the inner wall of well wet flue gas desulfurization tower 2 (desulfurizer guide plate 13 can with doctor solution ponding groove 7 integrated into one piece, form the structure as shown in the figure to set up the hole that supplies the waste gas circulation between desulfurizer guide plate 13 and doctor solution ponding groove 7), desulfurizer guide plate 13 is located doctor solution ponding groove 7's top, and has the clearance that supplies the waste gas circulation between desulfurizer guide plate 13 and the doctor solution ponding groove 7.
The utility model discloses well desulfurizer guide plate 13 is including being less than 180 degrees desulfurizer that the angle is connected down hang plate and desulfurizer go up the hang plate (go up the hang plate and play the effect to middle part water conservancy diversion waste gas), and hang plate and desulfurizer go up the hang plate and all be connected with wet flue gas desulfurization tower 2's inner wall under the desulfurizer, and there is the clearance that supplies the waste gas circulation between hang plate and the desulfurizer ponding groove on the desulfurizer.
The technological process integrating the technical scheme disclosed above is as follows: the ozone generator 1 is used for providing ozone with oxidizing property to oxidize NO in the original flue gas into NO2、N2O3And N2O5And in other forms, the flue gas is absorbed by a desulfurizer sprayed by the first desulfurization liquid spray pipe 9 after entering the wet desulfurization tower 2, so that the first desulfurization and denitrification process is realized, and the flue gas is a first reaction zone of the device. The flue gas after desulfurization and denitrification passes through the oxidant and oxidant liquid accumulating tank 6, the residual NOx is further oxidized into a high-valence state form through the oxidation of the liquid oxidant again, the liquid oxidant is sprayed down through the spraying layer and performs gas-liquid oxidation reaction with the flue gas to realize secondary oxidation, and the falling liquid oxidant returns to the oxidant storage tank through the oxidant liquid accumulating tank 6 for recycling. The oxidized flue gas passes through the desulfurization liquid accumulation tank to be subjected to desulfurization and denitrification reaction with the desulfurizer sprayed by the second desulfurization liquid spraying pipe 11 again, so that secondary removal of nitrogen oxide and sulfur dioxide is realized, and finally the ultralow emission requirement of NOx is met. Whole device has 2 oxidation zones and 2 absorption zones, the absorbent is alkaline desulfurizer, the denitration oxidant is ozone and liquid oxidant respectively, whole engineering transformation need not carry out large-scale change to former equipment, only need rise original desulfurizing tower, arrange liquid oxidant oxide layer and new desulfurization and spray the layer, it is less to reform transform, disposable input is lower, the form of wet flue gas desulfurization denitration simultaneously, need not additionally to heat the flue gas, reduce the consumption of gas, the cost of reduction operation that can be fine, equipment is less, the complexity of maintenance has been reduced. The method is very suitable for the existing treatment of desulfurization and denitrification of the sintering flue gas, and has good applicability.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. An oxidation denitration treatment device is characterized in that: the device comprises a wet desulphurization tower, and a first oxidation area, a first absorption area, a second oxidation area and a second absorption area which are sequentially arranged at intervals along the flowing direction of waste gas, wherein the upper part and the lower part of the wet desulphurization tower are respectively provided with a waste gas outlet and a waste gas inlet, the first oxidation area comprises an ozone generator for carrying out oxidation treatment on the waste gas passing through the waste gas inlet, the first absorption area comprises a desulphurization liquid source, a first desulphurization liquid delivery pump and a first desulphurization liquid spray pipe which are sequentially connected, the first desulphurization liquid spray pipe is positioned in the wet desulphurization tower, the second oxidation area comprises a liquid oxidant storage tank, an oxidant supply pump and an oxidant spray pipe which are sequentially connected, the oxidant spray pipe is positioned in the wet desulphurization tower, and the second absorption area comprises the desulphurization liquid source, the second desulphurization liquid delivery pump and the second desulphurization liquid spray pipe which are sequentially connected, and the second desulfurization liquid spray pipe is positioned in the wet desulfurization tower.
2. The oxidation-denitration treatment apparatus according to claim 1, characterized in that: the waste gas inlet is connected with a waste gas source through an air inlet pipeline, the ozone generator is communicated with the air inlet pipeline, and an interval is reserved between the connection part and the waste gas inlet.
3. The oxidation-denitration treatment apparatus according to claim 1, characterized in that: the desulfurization liquid source comprises an outer desulfurization liquid source and/or an inner desulfurization liquid source, and when the desulfurization liquid source is only the outer desulfurization liquid source, the first desulfurization liquid delivery pump and the second desulfurization liquid delivery pump are respectively communicated with the outer desulfurization liquid source; when the desulfurization solution source is only an inner desulfurization solution source, the inner desulfurization solution source is arranged at the bottom of an inner cavity of the wet desulfurization tower, and the first desulfurization solution delivery pump and the second desulfurization solution delivery pump are respectively communicated with the inner desulfurization solution source; when an external desulfurization liquid source and an internal desulfurization liquid source exist simultaneously, the first desulfurization liquid delivery pump and the second desulfurization liquid delivery pump are respectively communicated with the internal desulfurization liquid source, the external desulfurization liquid source is communicated with the internal desulfurization liquid source, or the first desulfurization liquid delivery pump and the second desulfurization liquid delivery pump are respectively communicated with the external desulfurization liquid source and the internal desulfurization liquid source, the external desulfurization liquid source is communicated with the internal desulfurization liquid source, or the first desulfurization liquid delivery pump and the second desulfurization liquid delivery pump are respectively communicated with the internal desulfurization liquid source and the external desulfurization liquid source, and the external desulfurization liquid source is communicated with the internal desulfurization liquid source.
4. The oxidation-denitration treatment apparatus according to claim 1, characterized in that: the spray ports of the first desulfurization liquid spray pipe, the oxidant spray pipe and the second desulfurization liquid spray pipe are all arranged downwards; the spraying areas of the first desulfurization solution spraying pipe, the oxidant spraying pipe and the second desulfurization solution spraying pipe cover the flowing area of the waste gas in the wet desulfurization tower.
5. The oxidation-denitration treatment apparatus according to claim 1, characterized in that: the second oxidation area further comprises an oxidant liquid accumulation tank, the oxidant liquid accumulation tank and a spraying opening of the oxidant spraying pipe are arranged oppositely, the opening area of the oxidant liquid accumulation tank is not smaller than the spraying area of the oxidant spraying pipe, a gap for waste gas to flow is formed between the oxidant liquid accumulation tank and the inner wall of the wet desulphurization tower, and the oxidant liquid accumulation tank is communicated with the liquid oxidant storage tank.
6. The oxidation-denitration treatment apparatus according to claim 5, characterized in that: and an oxidant guide plate is arranged on the inner wall of the wet desulphurization tower, the oxidant guide plate is positioned above the oxidant liquid accumulation tank, and a gap for the circulation of waste gas is formed between the oxidant guide plate and the oxidant liquid accumulation tank.
7. The oxidation-denitration treatment apparatus according to claim 6, characterized in that: the oxidant guide plate comprises an oxidant lower inclined plate and an oxidant upper inclined plate which are connected at an angle smaller than 180 degrees, the oxidant lower inclined plate and the oxidant upper inclined plate are both connected with the inner wall of the wet desulphurization tower, and a gap for waste gas to flow is formed between the oxidant upper inclined plate and the oxidant liquid collecting tank.
8. The oxidation-denitration treatment apparatus according to claim 1 or 7, characterized in that: the second absorption area further comprises a desulfurization solution accumulation tank, the desulfurization solution accumulation tank is opposite to the spraying opening of the desulfurizer spraying pipe, the opening area of the desulfurization solution accumulation tank is not smaller than the spraying area of the desulfurizer spraying pipe, a gap for waste gas to flow is formed between the desulfurization solution accumulation tank and the inner wall of the wet desulfurization tower, and the desulfurization solution accumulation tank is communicated with the desulfurization solution source.
9. The oxidation-denitration treatment apparatus according to claim 8, characterized in that: and a desulfurizer guide plate is arranged on the inner wall of the wet desulfurization tower and positioned above the desulfurization solution accumulation tank, and a gap for waste gas circulation is formed between the desulfurizer guide plate and the desulfurization solution accumulation tank.
10. The oxidation-denitration treatment apparatus according to claim 9, characterized in that: the desulfurizer guide plate comprises a lower desulfurizer inclined plate and an upper desulfurizer inclined plate which are connected at an angle smaller than 180 degrees, the lower desulfurizer inclined plate and the upper desulfurizer inclined plate are both connected with the inner wall of the wet desulfurization tower, and a gap for waste gas circulation is formed between the upper desulfurizer inclined plate and the desulfurizer liquid accumulation tank.
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| CN202020194019.5U CN212039806U (en) | 2020-02-21 | 2020-02-21 | Oxidation method denitration treatment device |
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| CN202020194019.5U CN212039806U (en) | 2020-02-21 | 2020-02-21 | Oxidation method denitration treatment device |
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