Denitration system capable of reducing ammonia consumption

Abstract

The utility model relates to the technical field of denitration treatment, in particular to a denitration system capable of reducing ammonia consumption. A denitration system capable of reducing ammonia consumption comprises an incinerator, the incinerator comprises a first channel, a second channel and an ammonia water conveying pipeline, and the ammonia water conveying pipeline is divided into two paths which extend into the first channel and the second channel respectively; ammonia guns are arranged on the ammonia water conveying pipelines in the two channels; according to the scheme, the ammonia water conveying pipeline is adopted to convey the ammonia water into the two channels of the incinerator, so that denitration reaction is carried out in the most suitable environment, the consumption of the ammonia water is reduced, and meanwhile, the emission concentration of NOx is controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration treatment, in particular to a denitration system for reducing ammonia consumption. Background Art

[0002] In industries such as combustion power generation and waste treatment, for environmental protection, the flue gas generated by combustion often needs to be denitrified.

[0003] Currently, the denitration technology adopted in each system is mainly the SNCR denitration technology. The SNCR denitration technology sprays reducing agents such as NH3 and urea into the boiler furnace for selective reaction with NOx. When ammonia is used as a raw material, the ammonia guns in the prior art are generally arranged on the front wall and side wall of the first pass, resulting in a large consumption of ammonia water required during the operation of the denitration system in the prior art, and the emission concentration of NOx is not easy to control. Summary of the Utility Model

[0004] In view of this, an embodiment of the utility model discloses a denitration system for reducing ammonia consumption, which is used to solve the problems that the denitration system in the prior art requires a large consumption of ammonia water during operation and the emission concentration of NOx is not easy to control.

[0005] An embodiment of the utility model provides a denitration system for reducing ammonia consumption, including: an incinerator,

[0006] The incinerator includes: a first pass, a second pass and an ammonia water conveying pipeline;

[0007] The ammonia water conveying pipeline extends into the first pass and the second pass respectively in two paths;

[0008] Ammonia guns are provided on the ammonia water conveying pipelines in both passes.

[0009] Preferably, the ammonia water conveying pipeline includes: a first input end, a first output end and a second output end;

[0010] The ammonia water conveying pipeline is communicated with the ammonia water conveying system through the first input end and extends into the two passes in two paths;

[0011] The first output end is located on the ammonia water conveying pipeline extending into the first pass;

[0012] The second output end is located on the ammonia water conveying pipeline extending into the second pass;

[0013] Ammonia guns are installed on both the first output end and the second output end.

[0014] Preferably, the ammonia water conveying system includes: an ammonia water tank and a first ammonia water output pipeline;

[0015] One end of the first ammonia water output pipeline is connected to the first outlet of the ammonia water tank, and the other end of the first ammonia water output pipeline is connected to the first input end;

[0016] A filter is installed in the first ammonia water output pipeline;

[0017] An ammonia water pump, a pressure gauge, and a check valve are installed on the first ammonia water output pipeline.

[0018] Preferably, the ammonia water delivery system includes: a second ammonia water output pipeline;

[0019] One end of the second ammonia water output pipeline is connected to the second outlet of the ammonia water tank, and the other end of the second ammonia water output pipeline is connected to the first input end;

[0020] A filter is installed in the second ammonia water output pipeline;

[0021] An ammonia water pump, a pressure gauge, and a check valve are installed on the second ammonia water output pipeline.

[0022] Preferably, it further includes: a PNCR agent delivery system;

[0023] The PNCR agent delivery system includes: a PNCR agent tank and a first PNCR agent output pipeline;

[0024] One end of the first PNCR agent output pipeline is connected to the first outlet of the PNCR agent tank, and the other end of the first PNCR agent output pipeline is connected to the incinerator;

[0025] A filter is installed in the first PNCR agent output pipeline;

[0026] A PNCR agent water pump, a pressure gauge, and a check valve are installed on the first PNCR agent output pipeline.

[0027] Preferably, the PNCR agent delivery system further includes:

[0028] A second PNCR agent output pipeline;

[0029] The first end of the second PNCR agent output pipeline is connected to the second outlet of the PNCR agent tank, and the second end of the second PNCR agent output pipeline is connected to the incinerator;

[0030] A filter is installed in the second PNCR agent output pipeline;

[0031] A PNCR agent water pump, a pressure gauge, and a check valve are installed on the second PNCR agent output pipeline.

[0032] Preferably, the second end of the second PNCR agent output pipeline passes through the first channel and extends into the second channel.

[0033] Preferably, the second end of the second PNCR agent output pipeline is provided with four holes.

[0034] Preferably, a collection pool is provided on the first ammonia water output pipeline, and the collection pool is used to collect ammonia water when the pipeline leaks.

[0035] Preferably, a flow meter is installed on the first ammonia water output pipeline.

[0036] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

[0037] The embodiment of the present invention provides a denitration system for reducing ammonia consumption, including: an incinerator, the incinerator includes: a first channel, a second channel, and an ammonia water delivery pipeline; the ammonia water delivery pipeline is divided into two paths and extends into the first channel and the second channel respectively; ammonia guns are provided on the ammonia water delivery pipelines in the two channels. The above solution uses the ammonia water delivery pipeline to deliver ammonia water into the two channels of the incinerator, so that the denitration reaction is carried out in the most suitable environment, thereby reducing the consumption of ammonia water and controlling the emission concentration of NOx at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 It is a schematic structural diagram of a denitration system for reducing ammonia consumption provided in the embodiment of the present invention.

[0040] In the figure, incinerator A, first channel A1, second channel A2, ammonia water tank B, PNCR agent tank C, first ammonia water output pipeline 1, filter 2, ammonia water pump 3, pressure gauge 4, check valve 5, second ammonia water output pipeline 6, first PNCR agent output pipeline 7, PNCR agent water pump 8, second PNCR agent output pipeline 9, collection pool 10, flow meter 11, ammonia gun

[12] , spray gun 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0042] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "upper", "lower", "both ends", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. Relative terms such as "first", "second", etc. are only used to distinguish one entity from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities.

[0043] Unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", "setting" 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, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0044] For the convenience of understanding, please refer to Figure 1 , Figure 1 a denitration system for reducing ammonia consumption of the present utility model, including: incinerator A,

[0045] Incinerator A includes: a first channel A1, a second channel A2, and an ammonia water delivery pipeline;

[0046] The ammonia water delivery pipeline extends in two branches to the first channel A1 and the second channel A2 respectively;

[0047] Ammonia guns 12 are provided on the ammonia water delivery pipelines in the two channels.

[0048] It can be understood that in this embodiment, the ammonia water delivery pipeline is used to deliver ammonia water into the two channels of the incinerator, so that the denitration reaction is carried out in the most suitable environment, thereby reducing the consumption of ammonia water and controlling the emission concentration of NOx at the same time.

[0049] See Figure 1, during actual implementation, the ammonia water conveying pipeline enters the two channels from outside the incinerator, that is, the ammonia water conveying pipeline is divided into two paths outside the incinerator. One ammonia water conveying pipeline enters the first channel, and the other ammonia water conveying pipeline enters the second channel.

[0050] Specifically, the specific positions of the ammonia gun holes are as follows: the elevation is 33 m on the left and right sides of the second channel, and the horizontal position is at the midline between the front wall of the second channel and the tip of the deflecting flame angle. The arrangement angle of the ammonia gun is: perpendicular to the side wall and the muzzle of the ammonia gun is inclined downward by 5°.

[0051] In some embodiments, the ammonia water conveying pipeline includes: a first input end, a first output end, and a second output end;

[0052] The ammonia water conveying pipeline is connected to the ammonia water conveying system through the first input end, and then extends into the two channels in two paths;

[0053] The first output end is located on the ammonia water conveying pipeline extending into the first channel A1;

[0054] The second output end is located on the ammonia water conveying pipeline extending into the second channel A2;

[0055] Both the first output end and the second output end are equipped with ammonia guns 12.

[0056] It can be understood that by arranging ammonia guns in the first channel and the second channel respectively, the reaction area between ammonia water and flue gas can be enlarged, and the reaction efficiency of ammonia water can be improved.

[0057] In a more optimal implementation scheme, multiple ammonia guns are respectively provided at the first output end and the second output end. The specific pipeline layout is as follows: a manual valve is newly added to each of the ammonia water main pipe and the compressed air main pipe at the outlet of the mixing control cabinet. The ammonia water pipe uses a Φ25*3mm stainless steel pipe, and the compressed air pipe uses a Φ32*3mm carbon steel pipe. After leading to the 33 m platform, it is divided into two paths to the vicinity of the newly added ammonia gun holes on the left and right sides. A manual valve is installed at each end of the pipeline, and it is connected to the ammonia gun and the ammonia gun sleeve through a hose. A pressure gauge with a range of 0-0.6 MPa is installed on each of the newly added ammonia water pipe and the compressed air pipeline.

[0058] In some embodiments, the ammonia water conveying system includes: an ammonia water tank B and a first ammonia water output pipeline 1;

[0059] One end of the first ammonia water output pipeline 1 is connected to the first outlet of the ammonia water tank B, and the other end of the first ammonia water output pipeline 1 is connected to the first input end;

[0060] A filter 2 is installed in the first ammonia water output pipeline;

[0061] An ammonia water pump 3, a pressure gauge 4, and a check valve 5 are installed on the first ammonia water output pipeline.

[0062] Among them, the ammonia water pump is used to transport ammonia water to the ammonia gun, the filter is used to filter impurities in the ammonia water, the pressure gauge is used to monitor whether the water flow and water pressure of the ammonia water are normal, and the check valve is convenient for maintenance to prevent the ammonia water from flowing back into the pipeline during maintenance. In this embodiment, the ammonia water is transported to the ammonia gun through the ammonia water transportation system, which can monitor whether the water flow and water pressure of the ammonia water are normal and can also prevent the ammonia water from flowing back.

[0063] In some embodiments, the ammonia water transportation system includes: a second ammonia water output pipeline 6;

[0064] One end of the second ammonia water output pipeline is connected to the second outlet of the ammonia water tank, and the other end of the second ammonia water output pipeline is connected to the first input end;

[0065] A filter 2 is installed inside the second ammonia water output pipeline;

[0066] An ammonia water pump 3, a pressure gauge 4, and a check valve 5 are installed on the second ammonia water output pipeline.

[0067] It can be understood that a bypass is provided in the ammonia water output pipeline, that is, two ammonia water output pipelines are provided. If a failure occurs in the main pipeline, it can be switched at any time to avoid the entire process from stopping due to pipeline damage and improve the denitration process efficiency.

[0068] In some embodiments, it further includes: a PNCR reagent transportation system;

[0069] In this embodiment, PNCR (Post-Combustion NOx Reduction) denitration is a technology for direct denitration in a waste incinerator. The PNCR reagent is a chemical reagent for denitration, which is a polymer selective denitration reagent in this embodiment. Those skilled in the art can purchase it from different manufacturers according to needs and test it in the system. This solution improves the transportation system, and the specific use of the reagent is not specifically limited herein.

[0070] The PNCR reagent transportation system includes: a PNCR reagent tank C and a first PNCR reagent output pipeline 7;

[0071] One end of the first PNCR reagent output pipeline 7 is connected to the first outlet of the PNCR reagent tank C, and the other end of the first PNCR reagent output pipeline 7 is connected to the incinerator A;

[0072] A filter is installed inside the first PNCR reagent output pipeline;

[0073] A PNCR reagent water pump 8, a pressure gauge, and a check valve are installed on the first PNCR reagent output pipeline.

[0074] Since the PNCR agent has a higher denitrification efficiency than the ammonia water agent, in this embodiment, by jointly adopting the SNCR+PNCR denitrification method, the NOx emission concentration can be further reduced.

[0075] Among them, the PNCR agent water pump 8 is used to transport the PNCR agent into the incinerator. The filter is used to filter impurities in the PNCR agent. The pressure gauge is used to monitor whether the flow rate and pressure of the PNCR agent are normal. The check valve is convenient for maintenance and prevents the PNCR agent from flowing back into the pipeline during maintenance. In this embodiment, the PNCR agent is transported into the incinerator through the PNCR agent delivery system, which can monitor whether the flow rate and pressure of the PNCR agent are normal and can also prevent the PNCR agent from flowing back.

[0076] In some embodiments, the PNCR agent delivery system further includes:

[0077] The second PNCR agent output pipeline 9;

[0078] The first end of the second PNCR agent output pipeline 9 is connected to the second outlet of the PNCR agent tank, and the second end of the second PNCR agent output pipeline 9 is connected to the incinerator;

[0079] A filter is installed in the second PNCR agent output pipeline 9;

[0080] A PNCR agent water pump, a pressure gauge, and a check valve are installed on the second PNCR agent output pipeline 9.

[0081] It can be understood that a bypass is provided in the PNCR agent output pipeline, that is, two PNCR agent output pipelines are provided. If a failure occurs in the main pipeline, it can be switched at any time to avoid the situation where the entire process stops due to pipeline damage and improve the denitrification process efficiency.

[0082] In some embodiments, the second end of the second PNCR agent output pipeline passes through a channel A1 and extends into a second channel A2, so that the PNCR agent can carry out denitrification reaction in the most suitable environment and improve the denitrification efficiency.

[0083] In some embodiments, the second end of the second PNCR agent output pipeline directly extends into the second channel A2, which is more convenient for pipeline installation.

[0084] In some embodiments, the second end of the second PNCR agent output pipeline is provided with four holes.

[0085] It can be understood that spray guns 13 are respectively installed in the four holes at the second end of the second PNCR agent output pipeline, so that the PNCR agent is evenly output into the second channel and the denitrification rate is accelerated.

[0086] In some embodiments, a collection pool 10 is provided on the first ammonia water output pipeline, and the collection pool is used to collect ammonia water when there is a leak in the pipeline.

[0087] It can be understood that when there are multiple ammonia water output pipelines, collection pools can be respectively provided on each pipeline, or a large collection pool can be provided, and the area of the large collection pool covers the lower part of the ammonia water output pipeline. When a PNCR reagent output system is set up, a collection pool is also provided on the PNCR reagent output pipeline to collect the leaked PNCR reagent.

[0088] In some embodiments, a flow meter 11 is installed on the first ammonia water output pipeline to more accurately monitor the flow rate of ammonia water. It can be understood that when there are multiple ammonia water output pipelines, flow meters can be respectively provided on each pipeline, or when multiple ammonia water output pipelines converge into the same main pipeline, a flow meter is provided on the main pipeline. When a PNCR reagent output system is set up, a flow meter is also provided on the PNCR reagent output pipeline, and the setting method is the same as that of the ammonia water pipeline.

[0089] The above has introduced in detail a denitration system for reducing ammonia consumption provided by the present utility model. For those of ordinary skill in the art, according to the idea of the embodiments of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A denitration system for reducing ammonia consumption, comprising: Incinerator, characterized in that the incinerator comprises: a first channel, a second channel and an ammonia water conveying pipeline; The ammonia water conveying pipeline extends into the first channel and the second channel respectively in two branches; Ammonia guns are provided on the ammonia water conveying pipelines in both channels.

2. The denitration system for reducing ammonia consumption according to claim 1, wherein The ammonia water conveying pipeline comprises: a first input end, a first output end and a second output end; The ammonia water conveying pipeline is communicated with the ammonia water conveying system through the first input end and extends into the two channels in two branches; The first output end is located on the ammonia water conveying pipeline extending into the first channel; The second output end is located on the ammonia water conveying pipeline extending into the second channel; Ammonia guns are installed at both the first output end and the second output end.

3. The denitration system for reducing ammonia consumption according to claim 2, characterized in that, The ammonia water conveying system comprises: an ammonia water tank and a first ammonia water output pipeline; One end of the first ammonia water output pipeline is connected to the first outlet of the ammonia water tank, and the other end of the first ammonia water output pipeline is connected to the first input end; A filter is installed in the first ammonia water output pipeline; An ammonia water pump, a pressure gauge and a check valve are installed on the first ammonia water output pipeline.

4. The denitration system for reducing ammonia consumption according to claim 3, wherein, The ammonia water conveying system further comprises: a second ammonia water output pipeline; One end of the second ammonia water output pipeline is connected to the second outlet of the ammonia water tank, and the other end of the second ammonia water output pipeline is connected to the first input end; A filter is installed in the second ammonia water output pipeline; An ammonia water pump, a pressure gauge and a check valve are installed on the second ammonia water output pipeline.

5. The denitration system for reducing ammonia consumption according to claim 1, wherein It further comprises: PNCR agent conveying system; The PNCR agent conveying system comprises: a PNCR agent tank and a first PNCR agent output pipeline; One end of the first PNCR agent output pipeline is connected to the first outlet of the PNCR agent tank, and the other end of the first PNCR agent output pipeline is connected to the incinerator; A filter is installed in the first PNCR agent output pipeline; A PNCR agent water pump, a pressure gauge and a check valve are installed on the first PNCR agent output pipeline.

6. The denitration system for reducing ammonia consumption according to claim 5, characterized in that, The PNCR agent conveying system further comprises: A second PNCR agent output pipeline; The first end of the second PNCR agent output pipeline is connected to the second outlet of the PNCR agent tank, and the second end of the second PNCR agent output pipeline is connected to the incinerator; A filter is installed in the second PNCR agent output pipeline; A PNCR agent water pump, a pressure gauge and a check valve are installed on the second PNCR agent output pipeline.

7. The denitration system for reducing ammonia consumption according to claim 6, wherein The second end of the second PNCR agent output pipeline passes through the first channel and extends into the second channel; 8. The denitration system for reducing ammonia consumption according to claim 7, wherein, Four holes are provided at the second end of the second PNCR agent output pipeline; 9. The denitrification system for reducing ammonia consumption according to claim 3, characterized in that, A collection pool is provided on the first ammonia water output pipeline, and the collection pool is used for collecting ammonia water when there is a leakage in the pipeline.

10. The denitration system for reducing ammonia consumption according to claim 3, wherein A flow meter is installed on the first ammonia water output pipeline.

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