A white mud treatment device
By designing a white mud treatment device, the problems of high treatment costs and environmental pollution of sludge and white mud waste were solved, realizing the effective utilization of resources and low-cost treatment, reducing magnesium oxide consumption and improving combustion efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINE DRAGONS PAPER SHENYANG CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-07-03
AI Technical Summary
In existing technologies, when papermaking sludge and white mud waste are treated separately, boiler sludge has a high water content, low carbon content, and unstable calorific value, requiring additional fuel for separate incineration, resulting in high treatment costs; white mud is rich in alkaline substances such as CaCO3 and Ca(OH)2, and traditional landfill or stockpiling occupies land and pollutes the environment; wet desulfurization processes require large amounts of externally purchased magnesium oxide, resulting in high operating costs.
Design a white mud treatment device, including a crushing box, a feeding hopper and an incineration boiler. The amount of feed is observed through a borosilicate glass window on the feeding hopper to ensure that sludge and white mud are mixed in a specific ratio. The alkaline components of the white mud react with the acidic pollutants in the sludge to reduce the amount of fuel and desulfurizing agent used. The CaO generated from the decomposition of white mud reacts with SO2 in the flue gas to reduce the load on subsequent desulfurization processes. The ash residue after combustion is used for building materials.
It reduced waste disposal costs, decreased environmental pollution, achieved efficient resource utilization, reduced magnesium oxide consumption, and improved combustion efficiency and resource utilization.
Smart Images
Figure CN224454623U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of waste treatment technology, specifically relating to a white mud treatment device. Background Technology
[0002] Paper manufacturing enterprises generate some waste during the papermaking process. In order to actively respond to the national call for energy conservation, emission reduction and emission reduction, and to place energy conservation and environmental protection work in a more prominent position, it is necessary to carry out unified treatment and utilization of waste such as sludge and white mud generated by papermaking.
[0003] When existing waste materials such as sludge and white mud are treated separately, boiler sludge has a high water content, low carbon content, and unstable calorific value. Separate incineration requires additional fuel, resulting in high treatment costs.
[0004] The white mud, a product of papermaking alkali recovery, is rich in alkaline substances such as CaCO3 and Ca(OH)2. Traditional landfilling or dumping of this material occupies land and pollutes the environment.
[0005] Wet desulfurization processes require large amounts of magnesium oxide, which relies on external purchases and results in high operating costs. To address this, we propose a white mud treatment device. Utility Model Content
[0006] To address the issues raised in the background technology, existing waste materials such as sludge and white mud, when treated separately, have high water content, low carbon content, and unstable calorific value in boiler sludge, requiring additional fuel for separate incineration, resulting in high treatment costs.
[0007] The white mud, a product of papermaking alkali recovery, is rich in alkaline substances such as CaCO3 and Ca(OH)2. Traditional landfilling or dumping of this material occupies land and pollutes the environment.
[0008] Wet desulfurization processes require large amounts of magnesium oxide, relying on externally purchased magnesium oxide, resulting in high operating costs. This invention provides a white mud treatment device.
[0009] To achieve the above objectives, this utility model provides the following technical solution: a white mud treatment device, including a crushing box, a feeding hopper and an incineration boiler, wherein a crushing box is fixedly installed on one side above the base, a feeding hopper is fixedly connected above the crushing box, a tilting plate is movably installed inside the feeding hopper, and a tilting motor is fixedly connected to one end of the tilting plate through an output shaft;
[0010] A feeding pipe is fixed to the bottom of the crushing box, and an incineration boiler is fixed to one side of the feeding pipe. The incineration boiler has a furnace chamber inside, and a flue is fixedly connected to one side of the incineration boiler. A filter bucket is fixedly connected above one side of the flue, and a filter plate is fixed above the filter plate of the filter bucket.
[0011] As a preferred embodiment of the white mud treatment device of this utility model, the front end of the feed hopper is provided with a borosilicate glass window, and the inner surface of the window is laser-etched with double scale lines.
[0012] In a preferred embodiment of the white mud treatment device of this utility model, the flipping motor and the flipping plate form a rotating structure, and the cross-sectional dimensions of the flipping plate are matched with those of the feed hopper.
[0013] As a preferred embodiment of the white mud treatment device of this utility model, a linkage shaft is movably installed inside the crushing box, the linkage shaft is fixedly connected to the crushing motor through the output end, and several crushing blades are welded to the outer wall of the linkage shaft.
[0014] As a preferred embodiment of the white mud treatment device of this utility model, a filter screen plate is detachably installed at the bottom of the crushing box, and the sieve hole diameter of the filter screen plate is ≤3mm.
[0015] In a preferred embodiment of the white mud treatment device of this utility model, the crushing box is connected to the furnace cavity through the feeding pipe, the furnace cavity is a circulating fluidized bed structure, and a slag outlet is fixed at the bottom of the furnace cavity.
[0016] As a preferred embodiment of the white mud treatment device of this utility model, the filter bucket is detachably equipped with a filter plate, which is composed of a lower filter screen and an upper filler filter plate stacked together.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: In this application, by laser-etching a double scale on the borosilicate glass viewing window frame on the feed hopper, the operator can directly observe the amount of sludge and white mud added, and the ratio is strictly locked. The sludge and white mud are mixed in a specific ratio. The alkaline components of white mud, CaCO3 and Ca(OH)2, react with the acidic pollutants in the sludge, such as sulfur and nitrogen compounds, during the combustion process. The sludge provides the calorific value of organic matter combustion, and the white mud provides an alkaline adsorbent, reducing the amount of fuel and desulfurizing agent used. During the combustion process, the CaO generated by the decomposition of white mud directly reacts with SO2 and NOx in the flue gas, reducing the load on the subsequent desulfurization process. The CaO, SiO2 and other components in the ash after combustion can be directly used in building materials, preventing the problems of high treatment costs and environmental pollution when sludge, white mud and other wastes are treated separately. Attached Figure Description
[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the internal structure of the present invention;
[0021] Figure 3 This is a schematic diagram of the structure of the filter bucket and filter plate of this utility model;
[0022] Figure 4 This is a schematic diagram of the crushing box in this utility model.
[0023] In the diagram: 1. Base; 2. Crushing box; 3. Feed hopper; 4. Tilting plate; 5. Tilting motor; 6. Linkage shaft; 7. Crushing blade; 8. Crushing motor; 9. Filter screen plate; 10. Feeding pipe; 11. Incineration boiler; 12. Furnace cavity; 13. Slag outlet; 14. Smoke pipe; 15. Filter hopper; 16. Filter plate. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Embodiment 1
[0025] like Figures 1-4 As shown;
[0026] A white mud treatment device includes a crushing box 2, a feeding hopper 3, and an incineration boiler 11. The crushing box 2 is fixedly installed on one side above the base 1. The feeding hopper 3 is fixedly connected to the top of the crushing box 2. A tilting plate 4 is movably installed inside the feeding hopper 3. One end of the tilting plate 4 is fixedly connected to a tilting motor 5 through an output shaft. A feeding pipe 10 is fixed to the bottom of the crushing box 2. The incineration boiler 11 is fixed to one side of the feeding pipe 10. A furnace chamber 12 is opened inside the incineration boiler 11. A flue pipe 14 is fixedly connected to one side of the incineration boiler 11. A filter bucket 15 is fixedly connected above one side of the flue pipe 14. A filter plate 16 is fixed above the filter plate 16 of the filter bucket 15.
[0027] In this implementation plan: By laser-etching a double scale on the borosilicate glass viewing window frame on the feed hopper 3, the operator can directly observe the amount of sludge and white mud added, and strictly lock the addition ratio. The sludge and white mud are mixed in a specific ratio. The alkaline components of white mud, CaCO3 and Ca(OH)2, react with the acidic pollutants in the sludge, such as sulfur and nitrogen compounds, during the combustion process. The sludge provides the calorific value of organic matter, and the white mud provides an alkaline adsorbent, reducing the amount of fuel and desulfurizing agent used. During the combustion process, the CaO generated by the decomposition of white mud directly reacts with SO2 and NOx in the flue gas, reducing the load on the subsequent desulfurization process. The CaO, SiO2 and other components in the ash after combustion can be directly used in building materials.
[0028] In an optional embodiment, the feed hopper 3 is provided with a borosilicate glass window at the front end, and the inner surface of the window is laser-etched with double scale lines.
[0029] In this implementation plan, the operator can add materials by relying on the scale in the viewing window, and can observe the material accumulation height by comparing the scale lines to ensure that the materials are mixed in proportion.
[0030] In an optional embodiment, the tilting motor 5 and the tilting plate 4 form a rotating structure, and the tilting plate 4 matches the cross-sectional dimensions of the feed hopper 3.
[0031] In this implementation scheme: the flipping motor 5 drives the flipping plate 4 to flip, so that the mixed materials can be poured into the crushing box 2.
[0032] In an optional embodiment, a linkage shaft 6 is movably installed inside the crushing box 2. The linkage shaft 6 is fixedly connected to the crushing motor 8 through its output end, and several crushing blades 7 are welded to the outer wall of the linkage shaft 6.
[0033] In this implementation plan: the crushing motor 8 drives the linkage shaft 6 to rotate, which drives the crushing blade 7 to crush the material. A drying device is installed in the crushing box 2 to dry the mixture to a moisture content of ≤15% and improve combustion efficiency.
[0034] In an optional embodiment, a filter screen plate 9 is detachably installed at the bottom of the crushing chamber 2, and the filter screen plate 9 has a screen hole diameter of ≤3mm.
[0035] In this implementation plan: the filter screen plate 9 can classify the crushed material and improve combustion efficiency.
[0036] In an optional embodiment, the crushing box 2 is connected to the furnace cavity 12 via the feeding pipe 10. The furnace cavity 12 is a circulating fluidized bed structure, and a slag outlet 13 is fixed at the bottom of the furnace cavity 12.
[0037] In this implementation plan: In a circulating fluidized bed boiler at 850-950℃, the organic matter of sludge is burned for heating, and the white mud decomposes to generate CaO, which reacts with SO2 in the flue gas: CaO + SO2 + ½O2 → CaSO4, reducing magnesium oxide consumption by 60%.
[0038] In an optional embodiment, the filter hopper 15 is detachably fitted with a filter plate 16, which is composed of a lower filter screen and an upper filler filter plate stacked together.
[0039] In this implementation scheme: the lower part of the filter plate 16 is a filter screen, which can block particulate ash in the flue gas, and the upper part is a filter plate filled with modified alumina balls. Acidic gases and PM2.5 that penetrate the filter screen enter the filter plate. SO2 is adsorbed by the γ-Al2O3 micropores and reacts with CaO to solidify. NOx is catalytically reduced to N2 by the hydroxyl-OH on the surface of alumina.
[0040] Working principle: First, sludge and white mud are separately fed into the feed hopper 3. A transparent viewing window at one end of the feed hopper 3 allows for easy observation of the amount of material inside. The viewing window is equipped with scale lines. The operator feeds the material according to the scale lines and can observe the material accumulation height by comparing with the scale lines to ensure that the mixture is mixed in the correct ratio. The ratio of sludge to white mud is 1:0.5. Therefore, when the sludge reaches the second scale line, the white mud is then added to the third scale line. The tilting motor 5 is started, which drives the tilting plate 4 to tilt, pouring the mixture into the crushing box 2. Next, the crushing motor 8 is started, which drives the linkage shaft 6 to rotate, driving the crushing blades 7 to crush the material to a particle size ≤3mm. After crushing, the material is graded by the filter screen plate 9. The qualified particles are fed into the furnace chamber 12 of the incineration boiler 11 through the feeding pipe 10. The crushing box 2 is equipped with a drying device to dry the mixture to a certain moisture content. The sludge organic matter is burned to provide heat in a circulating fluidized bed boiler at 850-950℃. The white mud decomposes to generate CaO, which reacts with SO2 in the flue gas: CaO + SO2 + ½O2 → CaSO4, reducing magnesium oxide consumption by 60%. Finally, the flue gas enters the filter hopper 15 through the flue pipe 14 and is then purified by the filter plate 16 before being discharged. The filter plate 16 has a filter screen below it, which can block particulate ash in the flue gas. The filter plate above it is filled with modified alumina balls. Acidic gases and PM2.5 that penetrate the filter screen enter the filter plate. SO2 is adsorbed by the γ-Al2O3 micropores and reacts with CaO to solidify. NOx is catalytically reduced to N2 by the hydroxyl-OH on the surface of alumina. The ash slag containing CaSO4, CaO, etc. is discharged from the ash outlet 13 and can be directly used as a cement retarder or roadbed material, achieving zero landfill.
[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A white mud treatment device, comprising a crushing box (2), a feeding hopper (3), and an incineration boiler (11), characterized in that: A crushing box (2) is fixedly installed on one side above the base (1). A feeding hopper (3) is fixedly connected above the crushing box (2). A tilting plate (4) is movably installed inside the feeding hopper (3). A tilting motor (5) is fixedly connected to one end of the tilting plate (4) through an output shaft. The bottom of the crushing box (2) is fixed with a feeding pipe (10), and a combustion boiler (11) is fixed on one side of the feeding pipe (10). The combustion boiler (11) has a furnace chamber (12) inside. A flue pipe (14) is fixedly connected to one side of the combustion boiler (11). A filter bucket (15) is fixedly connected above one side of the flue pipe (14). A filter plate (16) is fixed above the filter plate (16) of the filter bucket (15).
2. The white mud treatment apparatus of claim 1, wherein: The feed hopper (3) has a borosilicate glass window at the front end, and the inner surface of the window is laser-etched with double scale lines.
3. The white mud treatment apparatus of claim 1, wherein: The rotating structure is formed between the rotating motor (5) and the rotating plate (4), and the cross-sectional dimensions of the rotating plate (4) are matched with those of the feed hopper (3).
4. The white mud treatment apparatus of claim 1, wherein: A linkage shaft (6) is movably installed inside the crushing box (2). The linkage shaft (6) is fixedly connected to the crushing motor (8) through the output end. Several crushing blades (7) are welded to the outer wall of the linkage shaft (6).
5. The white mud treatment apparatus of claim 1, wherein: A filter screen plate (9) is detachably installed at the bottom of the crushing box (2), and the filter screen plate (9) has a sieve hole diameter of ≤3mm.
6. The white mud treatment apparatus of claim 1, wherein: The crushing box (2) is connected to the furnace cavity (12) through the feeding pipe (10). The furnace cavity (12) is a circulating fluidized bed structure, and a slag outlet (13) is fixed at the bottom of the furnace cavity (12).
7. The white mud treatment apparatus of claim 1, wherein: The filter bucket (15) is detachably equipped with a filter plate (16), which is composed of a lower filter screen and an upper filler filter plate stacked together.