Flue gas purification system and waste incineration treatment device

Abstract

The utility model provides a flue gas purification system and a waste incineration treatment device.The flue gas purification system comprises a storage box, a conveying part and a combustion device, the storage box is used for storing a denitration agent and communicates with the combustion device through the conveying part, and the conveying part is used for conveying the denitration agent into the combustion device; and the denitration agent is used for reducing the concentration of oxynitride in the flue gas in the combustion device. By arranging the conveying part, a denitration agent in the storage box can be conveyed into the combustion device, flue gas generated in the combustion process can be subjected to denitration treatment while sufficient combustion of the household garbage is guaranteed, the denitration efficiency is improved, and therefore the concentration of nitric oxide in the discharged flue gas is controlled to be within the preset range; the pollution of flue gas to the environment is reduced; and meanwhile, the flue gas purification system is few in equipment, small in occupied area and capable of being applied to county domestic garbage treatment work, and the application range of the flue gas purification system is widened.

Description

Technical Field

[0001] The present application belongs to the technical field of miniaturized domestic waste incinerators, and specifically relates to a flue gas purification system and a waste incineration treatment device. Background Art

[0002] Incineration power generation has become the main way to treat domestic waste in my country's cities, and a large amount of nitrogen oxides will be released during the process of waste incineration power generation. In order to prevent the large amount of nitrogen oxides produced after the combustion of garbage from polluting the environment, the flue gas should be denitrated. At the same time, with the development of domestic waste treatment in counties, the demand for furnace denitrification of small-scale domestic waste incinerators has also emerged.

[0003] At present, the furnace denitrification treatment method of small-scale domestic waste incinerators is pre-combustion denitrification, that is, reducing the concentration of nitrogen oxides in the exhaust flue gas by controlling the combustion temperature and reducing the oxygen content. Since the reduction of oxygen content during combustion will cause the domestic waste to not burn fully, resulting in an increase in the carbon monoxide content in the flue gas, in order to ensure that the domestic waste can be fully burned, it is necessary to increase the oxygen content during the combustion of the domestic waste. At this time, the concentration of nitrogen oxides in the exhaust flue gas is likely to exceed the preset range.

[0004] Therefore, there is an urgent need for a flue gas purification system that can be applied to the field of small-scale waste incineration, which can denitrify the flue gas generated by combustion while ensuring the full combustion of domestic waste, so as to control the concentration of nitrogen oxides in the exhaust flue gas within a preset range. Utility Model Content

[0005] Therefore, the technical problem to be solved by the present application is to provide a flue gas purification system and a waste incineration treatment device, wherein the flue gas purification system can be applied to the field of small-scale waste incineration, and while ensuring the full combustion of domestic waste, it can denitrify the flue gas generated by the combustion to control the concentration of nitrogen oxides in the exhaust flue gas within a preset range.

[0006] In order to solve the above problems, the present application provides a flue gas purification system on the one hand, including a storage box, a conveying part and a combustion device, the storage box is used to store denitrification agent, the storage box is connected with the combustion device through the conveying part, the conveying part is used to transport the denitrification agent to the combustion device, and the denitrification agent is used to reduce the concentration of nitrogen oxides in the flue gas in the combustion device.

[0007] Optionally, the conveying part includes a lifting device and a stirring device, the stirring device is connected to the storage box, the lifting device is arranged between the storage box and the stirring device, and the storage box, the lifting device and the stirring device are connected in sequence.

[0008] Optionally, the conveying part also includes a feeding pipeline, one end of which is connected to the stirring device, and the other end is connected to the combustion device. A control device is provided on the feeding pipeline, and the control device is used to adjust the delivery amount of the denitrification agent in the feeding pipeline.

[0009] Optionally, the conveying part further includes a driving device, and the driving device is connected to the feeding pipeline.

[0010] Optionally, the conveying part further includes a feeding device, and the feeding device is arranged between the stirring device and the control device, and the stirring device, the feeding device and the control device are connected in sequence.

[0011] Optionally, the conveying part further includes a first injection unit, which is disposed on the feeding pipeline, and the feeding pipeline is connected to the combustion device through the first injection unit.

[0012] Optionally, the conveying part further includes a second injection unit, the flue gas purification system further includes a horizontal flue, the second injection unit is arranged on the feeding pipeline, and the feeding pipeline is also connected to the horizontal flue through the second injection unit.

[0013] Optionally, the flue gas purification system further includes a dust removal device, which is connected to an end of the horizontal flue away from the combustion device.

[0014] Optionally, the temperature in the combustion device is T, 830℃≤T≤1000℃.

[0015] Another aspect of the present application provides a waste incineration treatment device, comprising the flue gas purification system described above.

[0016] Beneficial Effects

[0017] The embodiments of the utility model provide a flue gas purification system and a waste incineration treatment device, wherein the flue gas purification system can transport the denitrification agent in the storage box to the combustion device by setting a conveying part, so as to achieve denitrification of the flue gas generated in the combustion process while ensuring the full combustion of domestic waste, thereby improving the denitrification efficiency, thereby controlling the concentration of nitrogen oxides in the exhaust flue gas within a preset range, and reducing the pollution of the flue gas to the environment; at the same time, the flue gas purification system in the present application has few equipment and occupies a small area, and can be applied to domestic waste treatment in counties, thereby increasing the scope of application of the flue gas purification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the flue gas purification system according to an embodiment of the present application.

[0019] The reference numerals are:

[0020] 1. Storage box; 2. Lifting device; 3. Stirring device; 4. Feeding device; 5. Control device; 6. Driving device; 7. Feeding pipeline; 8. First injection unit; 9. Second injection unit; 10. Combustion device; 11. Horizontal flue; 12. Dust removal device. DETAILED DESCRIPTION

[0021] In the description of the present application, 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" 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.

[0022] 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In this application, 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0025] See also Figure 1 As shown, according to one aspect of an embodiment of the present application, a flue gas purification system is provided, including a storage box 1, a conveying part and a combustion device 10, the storage box 1 is used to store denitrification agent, the storage box 1 is connected to the combustion device 10 through the conveying part, the conveying part is used to transport the denitrification agent to the combustion device 10, and the denitrification agent is used to reduce the concentration of nitrogen oxides in the flue gas in the combustion device 10.

[0026] The flue gas purification system provided in the embodiment of the utility model can transport the denitrification agent in the storage box 1 to the combustion device 10 mainly by setting a conveying part, so as to achieve denitrification of the flue gas generated in the combustion process while ensuring the full combustion of domestic waste, thereby improving the denitrification efficiency, thereby controlling the concentration of nitrogen oxides in the exhaust flue gas within a preset range, and reducing the pollution of the flue gas to the environment; at the same time, the flue gas purification system in the present application has few equipment and occupies a small area, and can be applied to domestic waste treatment in counties, thereby increasing the scope of application of the flue gas purification system.

[0027] Among them, the flue gas purification system is used to denitrify the flue gas generated by the incineration of domestic waste.

[0028] Among them, the flue gas purification system includes a storage box 1, and the storage box 1 can be cylindrical or rectangular, etc., and this application does not make further limitations.

[0029] Wherein, a denitrifying agent is arranged in the storage box 1 .

[0030] Among them, the denitrification agent can decompose and release highly active amino free radicals under high temperature conditions, which react with nitrogen oxides in the flue gas through the amino groups to reduce the nitrogen oxides to nitrogen.

[0031] Specifically, the denitrification agent uses a polymer material as a carrier, and the amino component is polymerized and loaded on the polymer material to form a mixture of solid powder and granules.

[0032] The flue gas purification system further includes a conveying unit, which can transport the denitrification agent to the chamber where the flue gas is located.

[0033] The flue gas purification system further includes a combustion device 10, which may be a waste heat boiler, etc. Domestic waste may be incinerated in the waste heat boiler.

[0034] Specifically, the storage box 1 is connected to the combustion device 10 through a conveying part, and the conveying part is used to transport the denitrification agent in the storage box 1 to the furnace of the combustion device 10, so that the denitrification agent can chemically react with the flue gas under high temperature conditions to reduce the concentration of nitrogen oxides in the flue gas, thereby preventing the discharged flue gas from polluting the environment.

[0035] Among them, the flue gas purification system is used to denitrate the flue gas after combustion, which can further reduce the content of nitrogen oxides in the flue gas compared with the denitrification treatment before combustion in the related art. In the embodiment of the present application, the flue gas purification system can reduce the concentration of nitrogen oxides in the flue gas to 250mg / Nm3, thereby improving the denitrification efficiency.

[0036] In the above embodiment, the conveying part includes a lifting device 2 and a stirring device 3, the stirring device 3 is connected to the storage box 1, the lifting device 2 is arranged between the storage box 1 and the stirring device 3, and the storage box 1, the lifting device 2 and the stirring device 3 are connected in sequence.

[0037] By arranging the storage box 1, the lifting device 2 and the stirring device 3 to be connected in sequence, the lifting device 2 can transport the denitrification agent in the storage box 1 to the stirring device 3, and the denitrification agent is stirred by the stirring device 3 so that the denitrification agent can be evenly mixed, thereby improving the denitrification efficiency.

[0038] Among them, the conveying part includes a lifting device 2, and the lifting device 2 can be a suction motor or a feeding unit, etc., and this application does not make further limitations.

[0039] Specifically, the lifting device 2 is connected to the storage box 1, and the lifting device 2 is used to transport the denitrification agent in the storage box 1 to the combustion device 10 or other process flows.

[0040] The conveying part further comprises a stirring device 3, and the stirring device 3 can be a cylindrical or rectangular container.

[0041] Among them, the lifting device 2 is arranged between the storage box 1 and the stirring device 3, one end of the lifting device 2 is connected to the storage box 1, and the other end is connected to the stirring device 3, so that the denitrification agent in the storage box 1 can be transported to the stirring device 3 through the lifting device 2.

[0042] Specifically, the stirring device 3 has a stirring tool and a stirring motor, and the stirring motor is connected to the stirring tool. The stirring motor can drive the stirring tool to rotate in the stirring device 3, so that the denitrification agent can be evenly mixed in the stirring device 3, thereby improving the denitrification efficiency of the denitrification agent.

[0043] In the above embodiment, the conveying part also includes a feeding pipeline 7, one end of the feeding pipeline 7 is connected to the stirring device 3, and the other end is connected to the combustion device 10. A control device 5 is arranged on the feeding pipeline 7, and the control device 5 is used to adjust the delivery amount of the denitrification agent in the feeding pipeline 7.

[0044] By providing a feeding pipeline 7 and a control device 5 on the feeding pipeline 7, the delivery amount of the denitrification agent in the feeding pipeline 7 can be adjusted, and the amount of the denitrification agent used can be determined according to the amount of garbage incineration, thereby avoiding waste of the denitrification agent and improving economic benefits.

[0045] The conveying part further includes a feeding pipeline 7, and the feeding pipeline 7 can be made of materials such as stainless steel or carbon steel.

[0046] Specifically, one end of the feeding pipeline 7 is connected to the stirring device 3 , and the other end is connected to the combustion device 10 , and the evenly mixed denitrification agent can be transported to the combustion device 10 through the feeding pipeline 7 .

[0047] The conveying part further comprises a control device 5 , and the control device 5 may be a frequency conversion controlled feeding module.

[0048] Specifically, the control device 5 is arranged on the feeding pipeline 7. The control device 5 can adjust the opening of the feeding pipeline 7 to adjust the delivery amount of the denitrification agent, so that the staff can determine the usage amount of the denitrification agent according to the amount of garbage incineration, thereby avoiding the waste of the denitrification agent and improving the economic benefits.

[0049] In the above embodiment, the conveying part further includes a driving device 6 , and the driving device 6 is connected to the feeding pipeline 7 .

[0050] By providing a driving device 6 and connecting the driving device 6 with the feeding pipeline 7, air flow pressure can be provided to the feeding pipeline 7 to convert the flow pressure of the air flow in the feeding pipeline 7 into power for conveying the denitrifying agent, thereby realizing the conveying of the denitrifying agent.

[0051] The driving device 6 may be a Roots blower or a pneumatic conveying device, etc., and this application does not make any further limitation.

[0052] Specifically, the driving device 6 is connected to the control device 5. In the embodiment of the present application, in order to reduce the floor space of the flue gas purification system, the stirring device 3 is arranged at a position higher than the control device 5. At this time, the denitrification agent in the stirring device 3 can continuously fall into the control device 5. By arranging the driving device 6 to be connected to the control device 5, a conveying power can be provided to the falling denitrification agent, so that the denitrification agent can be conveyed in the feeding pipeline 7.

[0053] Among them, a plurality of driving devices 6 can be provided. In the embodiment of the present application, two driving devices 6 are provided, and the two driving devices 6 are arranged in parallel.

[0054] In a specific application, the conveying part further includes a feeding device 4, which is arranged between the stirring device 3 and the control device 5, and the stirring device 3, the feeding device 4 and the control device 5 are connected in sequence.

[0055] By arranging a feeding device 4 between the stirring device 3 and the control device 5, and making the two ends of the feeding device 4 connected to the stirring device 3 and the control device 5 respectively, the denitrification agent evenly mixed in the stirring device 3 can be stably transported to the control device 5, thereby improving the stability of the denitrification agent transportation.

[0056] The feeding device 4 may be a screw feeder.

[0057] Specifically, one end of the spiral feeder is connected to the stirring device 3, and the other end is connected to the control device 5. By setting up the spiral feeder, the denitrification agent evenly mixed in the stirring device 3 can be transported to the control device 5. The spiral feeder can further stir the denitrification agent during the transportation process, thereby improving the uniformity of the denitrification agent; at the same time, the transportation speed of the denitrification agent in the spiral feeder is constant, thereby improving the stability of the denitrification agent transportation.

[0058] In the above embodiment, the conveying part further includes a first injection unit 8 , which is disposed on the feeding pipeline 7 , and the feeding pipeline 7 is connected to the combustion device 10 through the first injection unit 8 .

[0059] By providing the first injection unit 8 and connecting the feeding pipeline 7 to the combustion device 10 through the first injection unit 8, the denitrification agent can fully contact with the flue gas in the combustion device 10, thereby improving the denitrification efficiency.

[0060] The first spraying unit 8 may be a dual-fluid nozzle or the like.

[0061] Specifically, the smoke generated by the incineration of domestic waste is concentrated on the top of the combustion device 10 , and the first injection unit 8 is arranged on the feeding pipeline 7 and is connected to the top of the combustion device 10 .

[0062] Among them, by providing the first injection unit 8, the denitrification agent can enter the combustion device 10 in the form of dust after passing through the first injection unit 8, thereby increasing the contact area between the denitrification agent and the flue gas, which is beneficial to the reaction between the denitrification agent and the flue gas, thereby reducing the nitrogen oxide content in the flue gas and improving the denitrification efficiency.

[0063] In the above embodiment, the conveying part further includes a second injection unit 9 , the flue gas purification system further includes a horizontal flue 11 , the second injection unit 9 is arranged on the feeding pipeline 7 , and the feeding pipeline 7 is also connected to the horizontal flue 11 through the second injection unit 9 .

[0064] By arranging a second injection unit 9 on the feeding pipeline 7 and connecting the second injection unit 9 with the horizontal flue 11, it is possible to transport the denitrification agent to the horizontal flue 11 to achieve secondary denitrification, thereby further reducing the concentration of nitrogen oxides in the flue gas and further improving the denitrification efficiency.

[0065] The flue gas purification system further includes a horizontal flue 11 , and the horizontal flue 11 can be made of the same material as the feeding pipeline 7 .

[0066] Specifically, the horizontal flue 11 is connected to the combustion device 10 , and the horizontal flue 11 is arranged on the downstream side of the combustion device 10 along the flue gas flow direction. The flue gas after denitrification treatment in the combustion device 10 can enter the atmosphere through the horizontal flue 11 .

[0067] The conveying part further includes a second injection unit 9, which may be a dual-fluid nozzle or the like.

[0068] Specifically, the second injection unit 9 is arranged in parallel with the first injection unit 8, and the second injection unit 9 is arranged on the feeding pipeline 7 and is connected to the horizontal flue 11, so that the denitrification agent can be injected into the horizontal flue 11, so that the flue gas after denitrification by the combustion device 10 can be subjected to secondary denitrification treatment with the denitrification agent in the horizontal flue 11, thereby further reducing the content of nitrogen oxides in the flue gas and improving the denitrification efficiency. In the embodiment of the present application, the denitrification efficiency of the flue gas purification system can be guaranteed to be above 60%.

[0069] In the above embodiment, the flue gas purification system further includes a dust removal device 12 , and the dust removal device 12 is connected to an end of the horizontal flue 11 away from the combustion device 10 .

[0070] By providing a dust removal device 12 and connecting the dust removal device 12 to the end of the horizontal flue 11 away from the combustion device 10, dust removal can be performed on the flue gas before discharge, and acidic gases in the flue gas can be further removed to avoid environmental pollution after the flue gas is discharged into the atmosphere.

[0071] The dust removal device 12 may be a bag dust collector, etc., and this application does not make any further limitations.

[0072] Specifically, the dust removal device 12 is connected to the horizontal flue 11, and the dust removal device 12 is arranged on the downstream side of the horizontal flue 11 along the flow direction, so that the flue gas can be dusted on the surface of the dust removal device 12 before being discharged, and further remove the acidic gas to avoid polluting the environment after the flue gas is discharged into the atmosphere.

[0073] The flue gas at the outlet of the dust removal device 12 is sent to the chimney through the induced draft fan and discharged into the atmosphere.

[0074] In a specific application, the temperature in the combustion device 10 is T, 830°C≤T≤1000°C.

[0075] By setting the temperature range in the combustion device 10 to 830°C-1000°C, within this temperature range, the powdered polymer denitrification agent can decompose and release highly active amino free radicals, so that the amino groups can react with nitrogen oxides in the flue gas to convert them into nitrogen.

[0076] The temperature in the combustion device 10 is T, 830°C≤T≤1000°C.

[0077] Specifically, the temperature inside the combustion device 10 can be 830°C or 840°C or 850°C or 860°C or 870°C or 880°C or 890°C or 900°C or 910°C or 920°C or 930°C or 940°C or 950°C or 960°C or 970°C or 980°C or 990°C or 1000°C. In the embodiment of the present application, the temperature inside the combustion device 10 is preferably 910°C, at which time the denitrification efficiency of the denitrification agent is the highest.

[0078] Another aspect of an embodiment of the present application provides a waste incineration treatment device, comprising the above-mentioned flue gas purification system.

[0079] The embodiment of the utility model provides a flue gas purification system and a waste incineration treatment device, wherein the flue gas purification system is capable of transporting the denitrification agent in the storage box 1 to the combustion device 10 by setting a conveying part, so as to achieve denitrification of the flue gas generated in the combustion process while ensuring the full combustion of domestic waste, thereby improving the denitrification efficiency, thereby controlling the concentration of nitrogen oxides in the exhaust flue gas within a preset range, and reducing the pollution of the flue gas to the environment; at the same time, the flue gas purification system in the present application has less equipment and occupies a small area, and can be applied to domestic waste treatment in counties, thereby increasing the scope of application of the flue gas purification system.

[0080] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0081] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A flue gas purification system, characterized in that: The invention comprises a storage box (1), a conveying part and a combustion device (10), wherein the storage box (1) is used to store a denitrifying agent, the storage box (1) is connected to the combustion device (10) via the conveying part, the conveying part is used to transport the denitrifying agent into the combustion device (10), and the denitrifying agent is used to reduce the concentration of nitrogen oxides in the flue gas in the combustion device (10).

2. The flue gas purification system according to claim 1, characterized in that: The conveying section comprises a lifting device (2) and a stirring device (3); the stirring device (3) is connected to the material storage box (1); the lifting device (2) is arranged between the material storage box (1) and the stirring device (3); the material storage box (1), the lifting device (2) and the stirring device (3) are connected in sequence.

3. The flue gas purification system according to claim 2, characterized in that: The conveying section further comprises a feeding pipeline (7), one end of the feeding pipeline (7) being connected to the stirring device (3), and the other end of the feeding pipeline (7) being connected to the combustion device (10), and a control device (5) being arranged on the feeding pipeline (7), and the control device (5) being used to adjust the delivery amount of the denitrifying agent in the feeding pipeline (7).

4. The flue gas purification system according to claim 3, characterized in that: The conveying section further comprises a driving device (6), wherein the driving device (6) is connected to the feeding pipeline (7).

5. The flue gas purification system according to claim 3, characterized in that: The conveying section further comprises a feeding device (4), wherein the feeding device (4) is arranged between the stirring device (3) and the control device (5), and the stirring device (3), the feeding device (4) and the control device (5) are sequentially connected.

6. The flue gas purification system according to claim 3, characterized in that: The conveying section further comprises a first injection unit (8), wherein the first injection unit (8) is arranged on the feeding pipeline (7), and the feeding pipeline (7) is connected to the combustion device (10) via the first injection unit (8).

7. The flue gas purification system according to claim 3, characterized in that: The conveying section further comprises a second injection unit (9), and the flue gas purification system further comprises a horizontal flue (11). The second injection unit (9) is arranged on the feeding pipeline (7), and the feeding pipeline (7) is also connected to the horizontal flue (11) through the second injection unit (9).

8. The flue gas purification system according to claim 7, characterized in that: The flue gas purification system further comprises a dust removal device (12), wherein the dust removal device (12) is connected to an end of the horizontal flue (11) away from the combustion device (10).

9. The flue gas purification system according to claim 1, characterized in that: The temperature in the combustion device (10) is T, 830°C≤T≤1000°C.

10. A garbage incineration treatment device, characterized in that: A flue gas purification system comprising any one of claims 1 to 9.

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