Harmless recycling treatment device for waste incineration fly ash

Abstract

The utility model relates to the technical field of garbage treatment equipment, in particular to a harmless recycling treatment device for garbage incineration fly ash. Comprising an incineration tower which is provided with an air inlet for air inlet, a feeding pipe for feeding and a dust guide pipe for smoke exhaust and is used for garbage incineration; dust filtering liquid is injected into the settling tank, a blow-off pipe is arranged at the lower end of the settling tank, and a dust guiding pipe is inserted into the dust filtering liquid and used for smoke dust filtering; the dryer is used for drying smoke dust settled in the settling tank; the blow-off pipe is inserted into a cavity of the dryer; a heating pipe wound in the dryer is connected with a heat absorption pipe spirally wound in the incineration tower; the cake pressing machine is used for pressing the dried flying dust into cakes; and the heat recovery device is used for recycling incineration heat in the incineration tower. Flying dust is intercepted after smoke dust generated after waste incineration is filtered through the sedimentation tank; the intercepted flying dust is settled to form sludge, and the sludge is pressed into a mud cake after being dried, so that not only is subsequent problems caused by dust floating in the conveying process avoided, but also stacking, storage and conveying are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage disposal equipment technical field especially relates to a kind of harmless resourceful disposal device of garbage incineration fly ash. BACKGROUND

[0002] In the process of urbanization, garbage, as the product of city metabolism, was once the burden of city development, and some cities in the world have been surrounded by garbage. Garbage incineration is a garbage disposal method that has been practiced for many years. Through appropriate thermal decomposition, combustion, melting and other reactions, garbage is reduced in volume by oxidation at high temperature, becoming a process of residue or molten solid material. Compared with landfill method, it has smaller land occupation and higher efficiency, and the garbage incineration capacity increases year by year. However, a large amount of fly ash containing heavy metals and waste gas is generated after garbage incineration, forming new pollutants.

[0003] At present, the common treatment method for fly ash, a hazardous waste, is landfill. However, the harmful substances contained in fly ash far exceed the standard, and cannot be directly disposed of in hazardous waste landfill. Additional processes such as solidification are required to solidify the harmful components so that the fly ash meets the standard for entering the plant.

[0004] The fly ash after garbage incineration is in the form of dust, which is easy to scatter and disperse during transportation and disposal, not only causing the site to be dirty and messy, requiring additional cleaning labor, but also possibly causing harm to the health of personnel in the site.

[0005] Therefore, the utility model provides a kind of harmless resourceful disposal device of garbage incineration fly ash, which is agglomerated before garbage disposal for convenient transportation. UTILITY MODEL CONTENT

[0006] The utility model aims at solving the problems in the prior art and provides a kind of harmless resourceful disposal device of garbage incineration fly ash.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] A kind of harmless resourceful disposal device of garbage incineration fly ash, comprising:

[0009] The incineration tower is provided with an air inlet, a feeding pipe for feeding and a dust extraction pipe for smoke exhaust, and is used for garbage incineration.

[0010] The settling tank is internally injected with dust filtration liquid and is provided with a blowdown pipe at the lower end, and the dust extraction pipe is inserted into the dust filtration liquid, and is used for smoke dust filtration.

[0011] The dryer is used for drying the smoke dust settled in the settling tank, the blowdown pipe is inserted into the cavity of the dryer, and the heating pipe wound in the dryer is connected with the heat absorption pipe spirally wound in the incineration tower.

[0012] Cakes press, for fly ash after drying cakes; drying machine and cakes press through the belt connection;

[0013] Heat recovery device, for incineration tower incineration heat recycling.

[0014] Preferably, the incineration tower lower end is provided with air port, air port is connected with air blower, incineration tower side wall is provided with feed pipe, feed pipe and incineration tower connecting place is provided with baffle, net board is erected between air port and feed pipe in incineration tower, igniter is arranged below net board, incineration tower upper end is provided with dust pipe.

[0015] Preferably, the settling tank upper end is provided with cover, lower end is provided with blow-off pipe, blow-off pipe is provided with electric valve one, settling tank side wall is provided with feeding pipe, feeding pipe is provided with electric valve two, cover is provided with exhaust pipe, settling tank is provided with filter screen, dust pipe is inserted into settling tank and pipe opening is below filter screen, settling tank side wall below filter screen is provided with coagulation agent adding pipe, adding pipe is provided with electric valve three.

[0016] Preferably, the air port and air blower are provided with elbow pipe.

[0017] Preferably, the settling tank is provided with stirring paddle below filter screen.

[0018] Preferably, the heat recovery device includes water tank, water tank is connected with steam pipe through water pump, steam pipe is coiled on incineration tower and dust pipe, steam pipe is connected with steam turbine, steam turbine is connected with generator.

[0019] Compared with the prior art, the harmless resourceful treatment device for fly ash of waste incineration has the following beneficial effects:

[0020] 1. After the smoke dust of waste incineration is filtered through the settling tank, the fly ash is intercepted; the intercepted fly ash is settled to form sludge, the sludge is dried and pressed to form mud cakes, and the mud cakes are in a clumped state, which not only avoids the subsequent problems caused by dust floating in the conveying process, but also facilitates stacking, storage and conveying.

[0021] 2. The fly ash in the sludge state is dried by using the heat generated in the incineration process of the incineration tower, resources are reasonably utilized, and the loss and demand of additional energy are reduced.

[0022] Other advantages, objects and features of the present application will be described in the subsequent description; and to some extent, it will be obvious to those skilled in the art based on the study of the following; or it can be taught from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1The utility model discloses a garbage incineration fly ash agglomeration system schematic diagram.

[0024] Figure 2 The utility model discloses a garbage incineration heat recovery system schematic diagram.

[0025] Figure 3 The utility model discloses a garbage incineration heat recovery system schematic diagram.

[0026] Figure 4 The utility model discloses a garbage incineration heat recovery system schematic diagram.

[0027] In the figure: 1, incinerator tower, 2, sedimentation tank, 3, dryer, 4, cake press, 5, feed pipe, 6, isolation cover, 7, wind shield, 8, screen, 9, igniter, 10, elbow, 11, dust pipe, 12, filter screen, 13, feeding pipe, 14, adding pipe, 15, exhaust pipe, 16, stirring paddle, 17, heating pipe, 18, heat absorption pipe, 19, water sump, 20, steam pipe, 21, steam turbine, 22, blowdown pipe. DETAILED DESCRIPTION

[0028] Below will combine the utility model embodiment in the attached Figures 1-4 The technical scheme in the utility model embodiment is clearly and completely described, and obviously, the described embodiment only is a part of the utility model embodiment, but not all the embodiment.

[0029] Embodiment 1, to solve the problems in the prior art, the embodiment provides a kind of harmless resourceful disposal device of garbage incineration fly ash, including:

[0030] Incinerator tower 1 is equipped with the air inlet of air inlet, the feed pipe 5 of feeding, the dust pipe 11 of smoke exhaust, is used for garbage incineration.Feed pipe 5 port is equipped with the matching isolation cover 6.Incinerator tower 1 and the outer wall of matching facility are all wrapped with temperature insulation material, prevent scald.Dust pipe 11 is equipped with smoke extractor, is used to incinerator tower 1 inside flue gas to outwardly exhaust.Air inlet is connected with air blower, is used to garbage incineration after dust floatation and supply the air required for combustion.

[0031] Sedimentation tank 2 is injected into filter dust liquid inside, is equipped with blowdown pipe 22 in lower end, dust pipe 11 is inserted into filter dust liquid, is used for flue gas filter dust.The most economical filter dust liquid is water.

[0032] The dryer 3 is used to dry the smoke dust settled in the settling tank 2. The dryer 3 comprises a body, a drying tank is arranged in the body, a pollution discharge pipe 22 is inserted into the upper end of the drying tank, a discharging pipe is arranged at the lower end of the drying tank, an electric valve 4 is arranged on the discharging pipe, a heating pipe 17 is spirally wound around the outer wall of the drying tank in the body, the outlet of the heating pipe 17 is connected with a heat absorbing pipe 18 spirally wound in the incineration tower 1 through a circulating pump, and the other end of the heat absorbing pipe 18 is connected with the inlet of the heating tank. The heating pipe 17 and the heat absorbing pipe 18 circulate with liquid heating medium, such as heat conducting oil. The pipes connected with the heating pipe 17 and the heat absorbing pipe 18 and arranged outside the dryer 3 and the incineration tower 1 are coated with heat insulation material to prevent heat loss. The heat absorbing pipe 18 in the incineration tower 1 and the heating pipe 17 in the dryer 3 are bare pipes or pipes coated with heat conducting material, which does not affect heat absorption or heat release.

[0033] The briquetting machine 4 is used to briquette the dried fly ash. The dryer 3 and the briquetting machine 4 are connected through a belt. The briquetting machine 4 is a reciprocating press. The press is provided with an inclined guide hopper at the side of the mold cavity of the press. The guide hopper is arranged below the end of the belt.

[0034] The heat recovery device is used to recover and utilize the heat generated by the incineration in the incineration tower 1.

[0035] According to the above technical scheme:

[0036] In use, the isolation cover 6 is opened, the garbage is put into the incineration tower 1, and then the isolation cover 6 is closed for incineration. The air blower continuously injects air into the incineration tower 1 to provide oxygen required for combustion. At the same time, under the action of the air blowing of the air blower, the smoke dust formed after the garbage is burned floats up and is sucked into the air blower to be discharged into the settling tank 2 along the dust guide pipe 11. The air force of the air blower can be adjusted. With the increase of the air force of the air blower, the garbage is blown, thereby accelerating the floating of the smoke dust. The blowing of the garbage can also make the garbage contact with air more fully, thereby accelerating the combustion.

[0037] After the smoke dust is immersed in the filter dust liquid in the settling tank 2, the fly ash in the smoke dust is adsorbed by the filter dust liquid, and part of the harmful gas is dissolved in the filter dust liquid, thereby realizing the separation of the fly ash and the smoke gas. The separated fly ash is settled in the filter dust liquid to form sludge.

[0038] The fly ash in the sludge state is injected into the drying tank in a spaced and quantitative manner for drying treatment. The heat conducting oil in the heating pipe 17 and the heat absorbing pipe 18 flows slowly and uniformly under the action of the circulating pump. The circulating heat conducting oil absorbs the heat generated by the garbage burning in the incineration tower 1 in the heat absorbing pipe 18 to be heated, and the heated heat conducting pipe is transferred to the heating pipe 17, thereby performing drying treatment on the fly ash in the sludge state in the drying tank.

[0039] The dried fly ash falls on the belt and is transported to the guide hopper along with the belt, and finally falls into the mold cavity of the cake press 4, and is extruded and formed by the hydraulic pressure of the cake press 4, forming a solid and solid mud cake.

[0040] In summary, after the smoke dust of waste incineration is filtered by the settling tank 2, the fly ash is intercepted; the intercepted fly ash is settled to form sludge, and the sludge is dried and pressed to form a mud cake, which is in a group state, which not only avoids the subsequent problems caused by the floating dust in the conveying process, but also facilitates stacking, storage and transportation.

[0041] In this embodiment, the upper end of the incineration tower 1 is fixed with a cover plate by a fastener, and the lower end of the incineration tower 1 is detachable for subsequent maintenance. A mesh plate 8 is arranged between the air inlet and the feed pipe 5 in the incineration tower 1, which separates the garbage by the mesh plate 8, and provides sufficient air diffusion space above the air inlet, so that the stacked garbage can be completely incinerated. The lower part of the mesh plate 8 is provided with an igniter 9 to realize the ignition treatment of garbage in a closed environment (preferably, a combustion-supporting agent can be added to promote garbage incineration). The feed pipe 5 of the incineration tower 1 is provided with a wind shield 7 at the connection part of the incineration tower 1, which is made of high-temperature-resistant metal material, such as solid 316 stainless steel plate. Referring to the drawings, when the garbage is put in, the garbage falls along the feed pipe 5, the wind shield 7 is pushed open by the garbage, and the garbage falls on the mesh plate 8. After stopping putting garbage, cover the isolation cover 6, and the wind shield 7 is pressed against the outlet of the feed pipe 5 under its own weight to close the feed pipe 5. To reduce the amount of smoke dust penetrating into the feed pipe 5 and reduce the amount of fly ash adhering to the inner wall of the feed pipe 5. If the garbage that has not fallen into the incineration tower 1 can be pushed by tools to ensure that the garbage falls completely, the wind shield 7 is prevented from being jammed by the garbage. Figure 3

[0042] In this embodiment, the upper end of the settling tank 2 is provided with a cover, so that the settling tank 2 can be opened for maintenance and internal cleaning. The blowdown pipe 22 is provided with an electric valve one for controlling the opening and closing of the blowdown pipe 22 to discharge the slurry. The side wall of the settling tank 2 is provided with a feeding pipe 13, and the feeding pipe 13 is provided with an electric valve two. The feeding pipe 13 is used to supplement the loss of the settling liquid in the settling tank 2. The induced draft pipe penetrates the cover and is inserted into the settling liquid in the settling tank 2 to realize dust filtration. The cover is provided with an exhaust pipe 15 for smoke exhaust (preferably, the exhaust pipe 15 is also connected with a spray tower for smoke purification treatment). The settling tank 2 is provided with a filter screen 12, and the dust extraction pipe 11 is inserted into the settling tank 2 and the pipe opening is located below the filter screen 12. The filtered fly ash is isolated by the filter screen 12, i.e. the filtered dust liquid is layered to increase the concentration of fly ash in the lower layer of dust liquid and accelerate the settlement. The side wall below the filter screen 12 of the settling tank 2 is provided with an addition pipe 14 of flocculating agent, and the addition pipe 14 is provided with an electric valve three. The flocculating agent such as alum is added to promote the flocculation of fly ash to form sludge and accelerate the settlement.​

[0043] In the embodiment, the heat recovery device comprises a water tank 19 for storing water, and the water in the water tank 19 can be replenished. The water outlet of the water tank 19 is connected with a steam pipe 20 through a water pump, the steam pipe 20 is bent and wound on the incineration tower 1 and the dust collection pipe 11, and the steam pipe 20 absorbs heat to make the water flowing in the steam pipe 20 warm and vaporize. The pipe wall of the steam pipe 20 leaking to the environment is covered with heat insulation material. The steam pipe 20 is connected with a steam turbine 21 through a pressure pump, and the steam turbine 21 is connected with a generator. The steam in the steam pipe 20 is pressurized through the pressure pump, the pressurized steam drives the turbine of the steam turbine 21 to rotate, thereby forming mechanical driving, driving the generator to start, generating electricity, and improving the utilization rate of the heat generated by the incineration of garbage. The steam input into the steam turbine 21 can be recycled and used by condensation.

[0044] In the further embodiment of the present application, a bend pipe 10 is arranged between the tuyere and the air blower. The bend pipe 10 forms an isolation effect, avoids the fly ash from falling into the pipeline of the air blower and causing abrasion, and also avoids the liquid material formed after the incineration of part of the garbage from flowing directly into the air blower and damaging the air blower. The bend of the bend pipe 10 is connected with a discharge pipe, and the discharge pipe is provided with an electric valve five. The electric valve five is used for discharging the molten garbage.

[0045] In the further embodiment of the present application, the settling tank 2 is provided with a stirring paddle 16 below the filter screen 12. The stirring paddle 16 is used for uniformly mixing the flocculating agent and improving the flocculation effect.

[0046] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

[0047] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0048] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A waste incineration fly ash harmless resourceful disposal device, characterized in that, include: The incineration tower (1) is equipped with an air inlet, a feeding pipe (5) for feeding materials, and a dust extraction pipe (11) for exhausting smoke, and is used for waste incineration; The settling tank (2) is filled with dust filter liquid and has a sewage pipe (22) at the bottom. The dust inlet pipe (11) is inserted into the dust filter liquid for flue gas dust filtration. Dryer (3) is used to dry the flue gas that settles in the settling tank (2); drain pipe (22) is inserted into the chamber of dryer (3); heating pipe (17) wound in dryer (3) is connected to heat absorption pipe (18) spirally wound in incineration tower (1). The cake press (4) is used to press cakes after drying and removing dust; the dryer (3) and the cake press (4) are connected by a belt; A heat recovery device is used to recover and utilize the incineration heat inside the incineration tower (1).

2. The device for harmless resourceful disposal of waste incineration fly ash according to claim 1, characterized in that, The incineration tower (1) is provided with an air vent at the lower end, and a blower is connected to the air vent. The side wall of the incineration tower (1) is provided with a feed pipe (5). A baffle plate (7) is provided at the connection between the feed pipe (5) and the incineration tower (1). A mesh plate (8) is installed inside the incineration tower (1) between the air vent and the feed pipe (5). An igniter (9) is provided below the mesh plate (8). A dust extraction pipe (11) is provided at the upper end of the incineration tower (1).

3. The device for harmless resourceful disposal of waste incineration fly ash according to claim 2, characterized in that, The sedimentation tank (2) is equipped with a cover at the top and a drain pipe (22) at the bottom. An electric valve is installed on the drain pipe (22). A feeding pipe (13) is installed on the side wall of the sedimentation tank (2). An electric valve is installed on the feeding pipe (13). An exhaust pipe (15) is installed on the cover. A filter screen (12) is installed inside the sedimentation tank (2). A dust extraction pipe (11) is inserted into the sedimentation tank (2) and its opening is located below the filter screen (12). A flocculant addition pipe (14) is installed on the side wall of the sedimentation tank (2) below the filter screen (12). An electric valve is installed on the addition pipe (14).

4. The device for harmless resourceful disposal of waste incineration fly ash according to claim 2, characterized in that, A bend (10) is provided between the air outlet and the blower.

5. The waste incineration fly ash harmless resourceful treatment device according to claim 3, characterized in that, The sedimentation tank (2) is equipped with a stirring paddle (16) located below the filter screen (12) throughout the year.

6. The waste incineration fly ash harmless resourceful disposal device according to claim 1, characterized in that, The heat recovery device includes a water tank (19), which is connected to a steam pipe (20) via a water pump. The steam pipe (20) is bent and coiled around the incinerator (1) and the dust extraction pipe (11). The steam pipe (20) is connected to a steam turbine (21), and the steam turbine (21) is connected to a generator.

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