Dust removal device for slag pit of waste incineration plant

Abstract

The dust removal device comprises a dust removal tower and an air exhaust assembly, the dust removal tower comprises a tower body, a clear water tank and a clear water circulating pump, an air inlet is formed in one side of the lower portion of the tower body, an air outlet is formed in the top of the tower body, and the air outlet is connected with the air exhaust assembly; a first spraying chamber, a second spraying chamber, a third spraying chamber and an absorption chamber are sequentially arranged in the tower body in the flue gas conveying direction, spraying assemblies are arranged in the first spraying chamber, the second spraying chamber and the third spraying chamber, and the clean water tank is connected with a clean water circulating pump. The clean water circulating pump is respectively connected with the spraying assemblies in the first spraying chamber, the second spraying chamber and the third spraying chamber through water outlet pipelines, and a water collecting tank is arranged at the inner bottom of the tower body and is communicated with a clean water tank. According to the utility model, water mist and smoke dust in the slag pit can be effectively reduced, and a good environment is provided for the slag pit.

Description

Technical Field

[0001] This application relates to the field of waste incineration plant technology, and in particular to a dust removal device for the slag pit of a waste incineration plant. Background Technology

[0002] Waste-to-energy incineration is an environmentally friendly and low-carbon waste treatment method in the current waste management process. It is an important means of reducing, harmlessly treating and recycling household waste. During the incineration process, combustible organic matter accounts for about 75% of household waste, while the remaining 25% cannot be incinerated. After the waste enters the boiler and is dried, incinerated and burned out, about 25% of slag is still produced.

[0003] With the development of the industry, waste-to-energy incineration plants are gradually being built in remote areas, resulting in insufficient waste volume and calorific value. This leads to an actual slag production exceeding the design capacity. When the slag volume is excessive, large amounts of water mist and dust accumulate in the slag pit, significantly increasing the difficulty and workload of cleaning. Furthermore, because the water mist and dust contain acidic substances and other corrosive components, prolonged accumulation in the slag pit can corrode the pit walls, bottom, and related equipment such as scraper conveyors and slag hoists, shortening equipment lifespan, increasing maintenance costs, and requiring more frequent equipment replacements. In addition, dust accumulation in the slag pit may spread into the surrounding environment with air currents, causing air pollution and affecting the quality of life and ecological environment of nearby residents. Moreover, leakage of leachate containing harmful substances may pollute the soil and groundwater. Therefore, this utility model proposes a dust removal device for slag pits in waste incineration plants. Utility Model Content

[0004] This application provides a dust removal device for the slag pit of a waste incineration plant, which can effectively reduce water mist and smoke in the slag pit and provide a good environment for the slag pit.

[0005] In view of this, this application provides a dust removal device for a waste incineration plant slag pit, comprising: a dust removal tower and an air extraction assembly;

[0006] The dust removal tower includes a tower body, a clean water tank, and a clean water circulation pump;

[0007] An air inlet is provided on one side of the lower part of the tower body;

[0008] An air outlet is provided at the top of the tower body;

[0009] The air outlet is connected to the air extraction assembly;

[0010] The tower body is provided with a first spray chamber, a second spray chamber, a third spray chamber and an absorption chamber arranged sequentially along the flue gas conveying direction;

[0011] Spraying components are provided in the first spray chamber, the second spray chamber, and the third spray chamber;

[0012] The clean water tank is connected to the clean water circulation pump;

[0013] The clean water circulation pump is connected to the spray assembly in the first spray chamber, the second spray chamber, and the third spray chamber respectively through the water outlet pipe;

[0014] A water collection trough is provided at the bottom inner part of the tower body;

[0015] The water collection tank is connected to the clean water tank.

[0016] Optionally, the exhaust assembly includes a fan inlet pipe, a dust removal fan, and a fan outlet pipe;

[0017] One end of the fan inlet pipe is connected to the air outlet, and the other end is connected to the inlet of the dust removal fan;

[0018] The outlet of the dust removal fan is connected to the fan outlet pipe.

[0019] Optionally, the air inlet is connected to an air inlet pipe;

[0020] The end of the air intake pipe furthest from the air inlet is located in the slag pit.

[0021] Optionally, the water outlet pipe includes a main water outlet pipe, a first branch pipe, a second branch pipe, and a third branch pipe;

[0022] The outlet header is connected to the outlet of the clean water circulation pump;

[0023] One end of the first branch pipe is connected to the spray assembly in the first spray chamber, and the other end is connected to the outlet main pipe;

[0024] One end of the second branch pipe is connected to the spray assembly in the second spray chamber, and the other end is connected to the outlet main pipe;

[0025] One end of the third branch pipe is connected to the spray assembly in the third spray chamber, and the other end is connected to the outlet main pipe.

[0026] Optionally, the spray assembly includes a spray pipe and a spray disc disposed on the spray pipe.

[0027] Optionally, the number of spray discs is multiple;

[0028] Multiple spray discs are evenly distributed on the spray pipe.

[0029] Optionally, a packing layer is provided in the first spray chamber, the second spray chamber, and the third spray chamber.

[0030] Optionally, the absorption chamber is provided with a packing layer.

[0031] Optionally, the packing layer is a Raschig ring.

[0032] Optionally, a drain outlet is provided at the bottom of the tower body.

[0033] As can be seen from the above technical solutions, the embodiments of this application have the following advantages: The dust removal device for the slag pit of the waste incineration plant includes a dust removal tower and an extraction component. The dust removal tower includes a tower body, a clean water tank and a clean water circulation pump. An air inlet is provided on one side of the lower part of the tower body, and an air outlet is provided on the top of the tower body. The air outlet is connected to the extraction component. A first spray chamber, a second spray chamber, a third spray chamber and an absorption chamber are arranged sequentially along the flue gas conveying direction inside the tower body. Spray components are provided in the first spray chamber, the second spray chamber and the third spray chamber. The clean water tank is connected to the clean water circulation pump. The clean water circulation pump is connected to the spray components in the first spray chamber, the second spray chamber and the third spray chamber respectively through the water outlet pipe. A water collection tank is provided at the bottom of the tower body. The water collection tank is connected to the clean water tank. During operation, the exhaust system draws flue gas (water vapor and dust) from the slag pit into the tower body through the air inlet. The flue gas rises from bottom to top, sequentially entering the first spray chamber, the second spray chamber, the third spray chamber, and the absorption chamber. At this time, the clean water circulation pump is activated, and the clean water in the clean water tank enters the spray system through the clean water circulation pump and the outlet pipe to achieve the spraying function. During this process, the clean water flows from top to bottom, creating a cross-flow with the flue gas rising from bottom to top. This clean water washes away the water vapor and dust in the flue gas, which then flows into the water collection tank at the bottom of the tower body and back into the clean water tank, forming a clean water circulation. The treated flue gas is finally discharged from the air outlet at the top of the tower body, effectively reducing water mist and dust in the slag pit and providing a good environment for the slag pit. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the dust removal device used in the slag pit of a waste incineration plant in an embodiment of this application;

[0035] Figure 2 This is a schematic diagram of the spray disc structure in an embodiment of this application;

[0036] The attached figures are labeled as follows:

[0037] 1-Tower body, 2-Dust removal fan, 3-Clean water tank, 4-Clean water circulation pump, 5-Fan inlet pipe, 6-Fan outlet pipe, 7-Air inlet pipe, 8-First spray chamber, 9-Second spray chamber, 10-Third spray chamber, 11-Absorption chamber, 12-Water collection tank, 13-Spray assembly, 14-Raschig ring, 15-Water outlet header, 16-First branch pipe, 17-Second branch pipe, 18-Third branch pipe, 19-Spray plate. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0039] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] This application provides an embodiment of a dust removal device for a waste incineration plant slag pit; please refer to the following for details. Figure 1 .

[0042] The dust removal device for the slag pit of a waste incineration plant in this embodiment includes a dust removal tower and an extraction assembly. The dust removal tower includes a tower body 1, a clean water tank 3, and a clean water circulation pump 4. An air inlet is provided on one side of the lower part of the tower body 1, and an air outlet is provided on the top of the tower body 1. The air outlet is connected to the extraction assembly. A first spray chamber 8, a second spray chamber 9, a third spray chamber 10, and an absorption chamber 11 are arranged sequentially inside the tower body 1 along the flue gas conveying direction. Spray assemblies 13 are provided in the first spray chamber 8, the second spray chamber 9, and the third spray chamber 10. The clean water tank 3 is connected to the clean water circulation pump 4. The clean water circulation pump 4 is connected to the spray assemblies 13 in the first spray chamber 8, the second spray chamber 9, and the third spray chamber 10 through water outlet pipes. A water collection tank 12 is provided at the bottom of the tower body 1, and the water collection tank 12 is connected to the clean water tank 3.

[0043] It should be noted that during use, the flue gas (water vapor and dust) in the slag pit can be drawn into the tower body 1 through the air inlet using the air extraction component. The flue gas rises from bottom to top and enters the first spray chamber 8, the second spray chamber 9, the third spray chamber 10, and the absorption chamber 11 in sequence. At this time, the clean water circulation pump 4 is started, and the clean water in the clean water tank 3 will enter the spray component 13 through the clean water circulation pump 4 and the water outlet pipe to achieve the spraying function. During this process, the clean water runs from top to bottom and flows in a cross-flow state with the flue gas that rises from bottom to top. This can wash away the water vapor and dust in the flue gas with clean water and flow into the water collection tank 12 at the bottom of the tower body 1, and then into the clean water tank 3 to form a clean water circulation. The treated flue gas is finally discharged from the air outlet at the top of the tower body 1, which can effectively reduce water mist and dust in the slag pit and provide a good environment for the slag pit.

[0044] The above is Embodiment 1 of a dust removal device for a waste incineration plant slag pit provided in this application. The following is Embodiment 2 of a dust removal device for a waste incineration plant slag pit provided in this application. Please refer to the following for details. Figure 1 and Figure 2 .

[0045] The dust removal device for the slag pit of a waste incineration plant in this embodiment includes a dust removal tower and an extraction assembly. The dust removal tower includes a tower body 1, a clean water tank 3, and a clean water circulation pump 4. An air inlet is provided on one side of the lower part of the tower body 1, and an air outlet is provided on the top of the tower body 1. The air outlet is connected to the extraction assembly. A first spray chamber 8, a second spray chamber 9, a third spray chamber 10, and an absorption chamber 11 are arranged sequentially along the flue gas conveying direction inside the tower body 1. The function of the absorption chamber 11 is to prevent water mist from being carried in the flue gas, which would affect the dust removal effect. Spray assemblies 13 are provided in the first spray chamber 8, the second spray chamber 9, and the third spray chamber 10. The clean water tank 3 is connected to the clean water circulation pump 4. The clean water circulation pump 4 is connected to the spray assemblies 13 in the first spray chamber 8, the second spray chamber 9, and the third spray chamber 10 through water outlet pipes. A water collection tank 12 is provided at the bottom of the tower body 1. The water collection tank 12 is connected to the clean water tank 3 to realize water circulation.

[0046] Specifically, the exhaust assembly includes a fan inlet pipe 5, a dust removal fan 2, and a fan outlet pipe 6. One end of the fan inlet pipe 5 is connected to the air outlet, and the other end is connected to the inlet of the dust removal fan 2. The outlet of the dust removal fan 2 is connected to the fan outlet pipe 6.

[0047] The air inlet is connected to an air inlet pipe 7, and the end of the air inlet pipe 7 away from the air inlet is located in the slag pit.

[0048] The water outlet pipe includes a main outlet pipe 15, a first branch pipe 16, a second branch pipe 17, and a third branch pipe 18. The main outlet pipe 15 is connected to the outlet of the clean water circulation pump 4. One end of the first branch pipe 16 is connected to the spray assembly 13 in the first spray chamber 8, and the other end is connected to the main outlet pipe 15. One end of the second branch pipe 17 is connected to the spray assembly 13 in the second spray chamber 9, and the other end is connected to the main outlet pipe 15. One end of the third branch pipe 18 is connected to the spray assembly 13 in the third spray chamber 10, and the other end is connected to the main outlet pipe 15.

[0049] The spray assembly 13 includes a spray pipe and spray discs 19 disposed on the spray pipe. Specifically, there can be multiple spray discs 19, which are evenly distributed on the spray pipe.

[0050] The first spray chamber 8, the second spray chamber 9, and the third spray chamber 10 are all equipped with a packing layer, which is arranged below the spray assembly 13; the absorption chamber 11 is also equipped with a packing layer. Specifically, the packing layer can be Raschig rings 14.

[0051] A drain outlet is provided at the bottom of tower body 1.

[0052] In practice, the end of the air inlet pipe 7 furthest from the air inlet is placed in the slag pit. The dust removal fan 2 is started, and under the action of the dust removal fan 2, the flue gas (water vapor and dust) in the slag pit will enter the tower body 1 through the air inlet pipe 7. The flue gas rises from bottom to top and enters the first spray chamber 8, the second spray chamber 9, the third spray chamber 10, and the absorption chamber 11 in sequence. At this time, the clean water circulation pump 4 is started, and the clean water in the clean water tank 3 will enter the spray assembly 13 through the clean water circulation pump 4 and the water outlet pipe. To achieve the spraying function, the clean water flows from top to bottom, creating a cross-flow with the flue gas flowing from bottom to top. The Raschig ring 14 expands the contact area, flushing away the water vapor and dust in the flue gas with clean water. The water flows into the water collection tank 12 at the bottom of the tower body 1 and then re-enters the clean water tank 3, forming a clean water cycle. The treated flue gas finally enters the fan inlet pipe 5, and after being processed by the dust removal fan 2, the dust-suppressed flue gas is discharged from the fan outlet pipe 6.

[0053] Understandably, in actual use, the water in the clean water tank 3 needs to be replaced regularly to ensure the dust removal effect.

[0054] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A dust removal device for a slag pit of a waste incineration plant, characterized by, The utility model relates to a dust removal tower and air extraction assembly. The dust removal tower comprises a tower body, a clean water tank and a clean water circulating pump. The tower body is provided with an air inlet on one side of the lower part. The tower body is provided with an air outlet on the top. The air outlet is connected with the air extraction assembly. The tower body is provided with a first spray chamber, a second spray chamber, a third spray chamber and an absorption chamber in sequence along the direction of flue gas transportation. The first spray chamber, the second spray chamber and the third spray chamber are provided with spray assemblies. The clean water tank is connected with the clean water circulating pump. The clean water circulating pump is connected with the spray assemblies in the first spray chamber, the second spray chamber and the third spray chamber through water outlet pipelines. The tower body is provided with a water collecting tank on the inner bottom. The water collecting tank is connected with the clean water tank. The air extraction assembly comprises a fan inlet pipe, a dust removal fan and a fan outlet pipe.

2. The dedusting device for a slag pit of a waste incineration plant according to claim 1, characterized in that, One end of the fan inlet pipe is connected with the air outlet, and the other end is connected with the inlet of the dust removal fan. The outlet of the dust removal fan is connected with the fan outlet pipe. The air inlet pipe is connected with an air inlet pipe.

3. The dust removal device for a residue pit of a waste incineration plant according to claim 1, characterized by, The end of the air inlet pipe away from the air inlet is arranged in a slag pit. The water outlet pipeline comprises a water outlet main pipe, a first branch pipe, a second branch pipe and a third branch pipe.

4. The dust removal device for a residue pit of a waste incineration plant according to claim 1, characterized by, The water outlet main pipe is connected with the outlet of the clean water circulating pump. One end of the first branch pipe is connected with the spray assembly in the first spray chamber, and the other end is connected with the water outlet main pipe. One end of the second branch pipe is connected with the spray assembly in the second spray chamber, and the other end is connected with the water outlet main pipe. One end of the third branch pipe is connected with the spray assembly in the third spray chamber, and the other end is connected with the water outlet main pipe. The spray assembly comprises a spray pipeline and a spray disc arranged on the spray pipeline.

5. The dedusting device for a slag pit of a waste incineration plant according to claim 1 or 4, characterized in that, The number of the spray discs is multiple.

6. The dust removal device for a residue pit of a waste incineration plant according to claim 5, characterized by, The multiple spray discs are uniformly distributed on the spray pipeline. The first spray chamber, the second spray chamber and the third spray chamber are provided with a filler layer.

7. The dust removal device for a residue pit of a waste incineration plant according to claim 1, characterized by, The absorption chamber is provided with a filler layer.

8. The dust removal device for a residue pit of a waste incineration plant according to claim 1, characterized by, The filler layer is a Rasching ring.

9. The dedusting device for a slag pit of a waste incineration plant according to claim 7 or 8, characterized in that The tower body is provided with a blowdown port on the bottom.

10. The dust removal device for a residue pit of a waste incineration plant according to claim 1, characterized by, ​

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