Fly ash and organic waste liquid granulating system

Abstract

The utility model discloses a fly ash and organic waste liquid granulating system which comprises a fly ash unpacking device, a fly ash metering and conveying device, a waste liquid tank, a waste liquid conveying device, a material mixing device, a granulating machine and a screening machine, the discharge end of the fly ash metering and conveying device is connected with the feed end of the mixing device, the discharge end of the waste liquid tank is connected with the feed end of the waste liquid conveying device, the discharge end of the waste liquid conveying device is connected with the feed end of the mixing device, the discharge end of the mixing device is connected with the feed end of the granulator, and the discharge end of the granulator is connected with the feed end of the waste liquid tank. And the discharging end of the granulator is connected with the feeding end of the screening machine. By the adoption of the system and method, the heat energy utilization rate of the organic waste liquid is increased, the smoke dust rate is reduced, the nodulation problem is greatly solved, and the production period of the kiln is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of comprehensive recycling technology of hazardous waste, specifically relating to a granulation system for fly ash and organic waste liquid. Background Technology

[0002] In recent years, with the rapid development of hazardous waste comprehensive recycling technology, fly ash and organic waste liquid treatment technologies have been continuously innovated and broken through, transitioning from the original disposal technologies such as safe landfill and incineration to resource-based comprehensive recycling technologies; among them, oxygen-enriched side-blown furnace high-temperature melting technology has become the mainstream process in the industry.

[0003] Currently, in the high-temperature melting process of the oxygen-enriched side-blown furnace, fly ash and organic waste liquid are directly fed into the oxygen-enriched side-blown furnace for high-temperature melting after being mixed with other raw materials and auxiliary materials. During the material feeding process, the organic waste liquid does not fall into the molten pool but undergoes combustion reaction in the preheating zone at the top of the furnace, thus failing to provide heat to the melting zone. Furthermore, due to its excessively fine particle size, the fly ash is easily carried away by the rising flue gas during its descent, resulting in a high dust rate in the oxygen-enriched side-blown furnace. Some fly ash adheres to the flue gas outlet of the oxygen-enriched side-blown furnace and the inner wall of the waste heat boiler inlet. Under high-temperature conditions, the agglomeration speed is fast, and the agglomeration area is large and thick, which seriously affects the flue gas extraction and ultimately requires furnace shutdown for treatment. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a granulation system for fly ash and organic waste liquid, so as to improve the thermal energy utilization rate of organic waste liquid, reduce the dust rate, greatly improve the problem of nodulation, and extend the production cycle of furnace and kiln.

[0005] This utility model solves the above problems through the following technical means:

[0006] A fly ash and organic waste liquid granulation system includes a fly ash unpacking device, a fly ash metering and conveying device, a waste liquid tank, a waste liquid conveying device, a mixing device, a granulator, and a screening machine. The discharge end of the fly ash unpacking device is connected to the inlet end of the fly ash metering and conveying device, the discharge end of the fly ash metering and conveying device is connected to the inlet end of the mixing device, the discharge end of the waste liquid tank is connected to the inlet end of the waste liquid conveying device, the discharge end of the waste liquid conveying device is connected to the inlet end of the mixing device, the discharge end of the mixing device is connected to the inlet end of the granulator, and the discharge end of the granulator is connected to the inlet end of the screening machine.

[0007] Furthermore, the fly ash unpacking device includes a fly ash bag hoisting device, an unpacking machine, and a dust collector. The unpacking machine includes a sealed chamber and a bag-breaking cone blade installed inside the sealed chamber. An opening and closing door is provided on one side of the sealed chamber. The fly ash bag hoisting device is connected to the sealed chamber, and the fly ash bags are hoisted in and out through the opening and closing door. The air inlet of the dust collector is connected to the sealed chamber.

[0008] Furthermore, the discharge end of the sealed chamber is connected to a buffer bin, the discharge end of the buffer bin is connected to the inlet end of the fly ash metering and conveying device, the ash discharge end of the dust collector is connected to the buffer bin, and an ash discharge valve is provided at the connection between the dust collector and the buffer bin.

[0009] Furthermore, the fly ash metering and conveying device includes an electronic belt scale and a fly ash conveying device. The discharge end of the buffer bin is connected to the feed end of the electronic belt scale, the discharge end of the electronic belt scale is connected to the feed end of the fly ash conveying device, and the discharge end of the fly ash conveying device is connected to the feed end of the mixing device.

[0010] Furthermore, the waste liquid tank is equipped with a stirring mechanism, and the inlet end of the waste liquid tank is connected to a waste liquid feeding device.

[0011] Furthermore, the mixer is equipped with an atomizing nozzle.

[0012] Furthermore, the discharge end of the mixing device is connected to the discharge end of the granulator via a mixing conveying device.

[0013] Furthermore, the discharge end of the pellet mill is connected to the feed end of the screening machine via a pellet conveying device.

[0014] Furthermore, the qualified material discharge end of the screening machine is connected to a qualified material conveying device, and the defective material discharge end of the screening machine is connected to a fly ash conveying device through the defective material conveying device.

[0015] A method using the above-mentioned fly ash and organic waste liquid granulation system includes the following steps:

[0016] S1: After unpacking, the bagged fly ash is added to the buffer bin, and the organic waste liquid is added to the waste liquid tank through the waste liquid feeding device.

[0017] S2: Fly ash and organic waste liquid are added to the mixing device according to the specified ratio;

[0018] S3: The materials are thoroughly mixed by the mixing device to obtain a mixture;

[0019] S4: The mixture is conveyed to the pellet mill, where it is pressed into shape.

[0020] S5: The material processed by the pellet mill is conveyed to the screening machine to screen out qualified granules, defective granules, and powder.

[0021] S6: Qualified granules are output through the qualified material conveying device, and are temporarily stored for later use after being naturally dried; substandard granules and powders are conveyed to the fly ash conveying device through the substandard material conveying device, and are granulated again after being stirred.

[0022] The beneficial effects of this utility model are:

[0023] 1. This application combines fly ash and organic waste liquid as raw materials, allowing for mutual utilization. It strictly controls the moisture content range of the mixture after mixing and uses a granulator for pressing, effectively ensuring the pressing rate and compressive strength. Simultaneously, a screening machine at the end separates granules of acceptable size and strength. Substandard granules and unpressed powder are returned to the front end of the system for re-mixing and pressing. This method offers advantages such as high one-time pressing rate and high granule compressive strength. The granules are then melted at high temperature in an oxygen-enriched side-blown furnace, improving the thermal energy utilization rate of the organic waste liquid, reducing dust levels, significantly alleviating the problem of nodule formation, and extending the furnace production cycle.

[0024] 2. This application includes processes such as unloading and buffering of fly ash and organic waste liquid, mixing, granulation and pressing, and screening. A depacking machine is installed at the fly ash unloading point and is tightly connected to the buffer silo. The depacking machine is equipped with a dust collector to prevent secondary dust dispersion during fly ash unloading and environmental pollution. The fly ash collected by the dust collector can be returned to the buffer silo. The mixing device is designed with atomizing nozzles to replenish water to the mixture in a timely manner, ensuring that the moisture content meets the pressing requirements. All links in the system are connected by conveying devices, resulting in a high level of automation, simple operation, short process flow, and low equipment investment. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings.

[0028] like Figure 1 As shown, this embodiment discloses a fly ash and organic waste liquid granulation system, including a fly ash unpacking device, a fly ash metering and conveying device, a waste liquid tank 20, a waste liquid conveying device, a mixing device 11, a granulator 14, and a screening machine 16. The discharge end of the fly ash unpacking device is connected to the inlet end of the fly ash metering and conveying device, the discharge end of the fly ash metering and conveying device is connected to the inlet end of the mixing device, the discharge end of the waste liquid tank is connected to the inlet end of the waste liquid conveying device, the discharge end of the waste liquid conveying device is connected to the inlet end of the mixing device, the discharge end of the mixing device is connected to the inlet end of the granulator, and the discharge end of the granulator is connected to the inlet end of the screening machine.

[0029] The fly ash unpacking device includes a fly ash bag hoisting device 1, an unpacking machine 8, and a dust collector 5. The unpacking machine includes a sealed chamber 3 and a bag-breaking cone 4 installed in the sealed chamber. An opening and closing door 2 is provided on one side of the sealed chamber. The fly ash bag hoisting device is connected to the sealed chamber and hoists the fly ash bags in and out through the opening and closing door. The air inlet of the dust collector is connected to the sealed chamber.

[0030] The discharge end of the sealed chamber is connected to a buffer bin 7, the discharge end of the buffer bin is connected to the inlet end of the fly ash metering and conveying device, the ash discharge end of the dust collector is connected to the buffer bin, and an ash discharge valve 6 is provided at the connection between the dust collector and the buffer bin.

[0031] The fly ash metering and conveying device includes an electronic belt scale 9 and a fly ash conveying device 10. The discharge end of the buffer bin is connected to the feed end of the electronic belt scale, the discharge end of the electronic belt scale is connected to the feed end of the fly ash conveying device, and the discharge end of the fly ash conveying device is connected to the feed end of the mixing device.

[0032] The waste liquid tank is equipped with a stirring mechanism 21, and the inlet end of the waste liquid tank is connected to a waste liquid feeding device 19.

[0033] The mixer is equipped with an atomizing nozzle 12.

[0034] The discharge end of the mixing device is connected to the discharge end of the granulator via the mixing conveying device 13.

[0035] The discharge end of the granulator is connected to the feed end of the screening machine via the granule conveying device 15.

[0036] The qualified material discharge end of the screening machine is connected to a qualified material conveying device 17, and the defective material discharge end of the screening machine is connected to a fly ash conveying device through a defective material conveying device 18.

[0037] The waste liquid tank is used to store organic waste liquid. The fly ash bag hoisting device uses an electric hoist to lift the fly ash ton bags into the sealed chamber of the unpacking machine. The sealed chamber 3 has an opening and closing door 2 on the side facing the fly ash bag hoisting device 1 for the entry and exit of the fly ash ton bags. The other sides and top are fully enclosed. A bag-breaking cone knife 4 is designed at the bottom and is tightly connected to the buffer bin 7. The bag dust collector 5 is used to collect the dust in the sealed chamber 3, keeping the sealed chamber 3 in a slightly negative pressure state. The collected dust falls into the buffer bin 7 through the ash discharge valve 6. The electronic belt scale 9 is designed at the discharge end of the buffer bin 7 to achieve quantitative, continuous, uniform, and stable feeding. The mixer 11 is used to mix and blend the fly ash and organic waste liquid, and is equipped with atomizing nozzles 12 to adjust the moisture content of the material in a timely manner. The granulator is a high-pressure briquetting machine with a total pressure of 600t. The screening machine 16 is a vibrating screen with a screen size of 25mm×25mm. The stirring mechanism 21 can be at least one of electric or pneumatic stirring. The waste liquid conveying device 22 is used to convey organic waste liquid into the mixer, including a pump and corresponding pipelines. The pump is equipped with a metering function, which can realize online adjustment of the conveying flow rate.

[0038] This embodiment also discloses a method using the above-mentioned fly ash and organic waste liquid granulation system, comprising the following steps:

[0039] S1: After unpacking, the bagged fly ash is added to the buffer bin, and the organic waste liquid is added to the waste liquid tank through the waste liquid feeding device.

[0040] S2: Fly ash and organic waste liquid are added to the mixing device according to the specified ratio;

[0041] S3: The materials are thoroughly mixed by the mixing device to obtain a mixture;

[0042] S4: The mixture is conveyed to the pellet mill, where it is pressed into shape.

[0043] S5: The material processed by the pellet mill is conveyed to the screening machine to screen out qualified granules, defective granules, and powder.

[0044] S6: Qualified granules are output through the qualified material conveying device, and are temporarily stored for later use after being naturally dried; substandard granules and powders are conveyed to the fly ash conveying device through the substandard material conveying device, and are granulated again after being stirred.

[0045] In step S1 above, within the production site, a construction vehicle transports bagged fly ash to a location below an electric hoist. After manual bag hanging and lifting, the hoist is opened, and once the bagged fly ash is hoisted into a sealed chamber, the hoist is closed. The bagged fly ash is then lowered to collide with a bag-breaking conical blade, causing the fly ash to break the bag and fall into a buffer bin. Simultaneously, organic waste liquid transported by tank trucks or in ton containers is temporarily stored in a waste liquid feeding device, which includes a corresponding pump and pipelines.

[0046] In S2 above, the proportions of fly ash and organic waste liquid are determined. The fly ash in the buffer silo is continuously and quantitatively fed according to the batching list by an electronic belt scale. The organic waste liquid is continuously and quantitatively fed according to the batching list by a waste liquid conveying device. The waste liquid conveying device includes a corresponding pump and a corresponding pipeline. The fly ash after batching and metering is continuously fed into the mixing device by the fly ash conveying device.

[0047] In S3 above, the added fly ash and organic waste liquid are thoroughly stirred in the mixing device. The operator can observe the moisture content of the mixture in the mixing device and adjust and control it in a timely manner by adding water through the atomizing nozzle, thereby obtaining the mixture.

[0048] In the above S4, the mixture is transported to the pellet mill by the mixing conveyor 13, and is granulated by high pressure. During the process, most of the mixture is pressed into shape to obtain the initial granules, while a small part of the mixture is not pressed into shape and remains as powder.

[0049] In the above S5, the initial granules and powders are sent to the screening machine through the granule conveying device 15. The oversize material is qualified granules, and the undersize material is defective granules and powders.

[0050] In the above-mentioned S6, qualified granules are transported to the underground pit through qualified material conveying device 17, and are temporarily stored for later use after natural drying; substandard granules and powders are returned to the fly ash conveying device through substandard material conveying device 18, and are granulated again after being stirred.

[0051] The fly ash includes one or more of the following: fly ash from hazardous waste incineration, fly ash from municipal solid waste incineration, and smoke and dust generated in the smelting industry.

[0052] The organic waste liquid includes one or more of the following: distillation residue, leachate, industrial wastewater, and waste organic solvents.

[0053] The ratio of fly ash to organic waste liquid is 92%:8%.

[0054] The moisture content of the mixture is controlled at 6% to 10%, preferably 8%.

[0055] The molding rate of the high-pressure pressing is 90%.

[0056] The proportion of qualified granular material is 87%, while the proportion of substandard granular material and powder is 13%.

[0057] The qualified granules are ellipsoids with a particle size of 30mm×30mm×25mm and an average compressive strength of 330~500N.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fly ash and organic waste liquid granulation system, characterized in that: The fly ash unpacking device, the fly ash metering conveying device, the waste liquid tank, the waste liquid conveying device, the mixing device, the granulator and the screening machine are connected.

2. The fly ash and organic waste liquid prilling system of claim 1, wherein: The fly ash unpacking device includes a fly ash bag hoisting device, an unpacking machine and a dust collector.

3. The fly ash and organic waste liquid prilling system of claim 2, wherein: The unpacking machine includes a closed chamber and a bag breaking cone knife arranged in the closed chamber.

4. The fly ash and organic waste liquid prilling system of claim 3, wherein: The closed chamber is connected with a buffer bin at the discharge end.

5. The fly ash and organic waste liquid prilling system of claim 4, wherein: The fly ash metering conveying device includes an electronic belt scale and a fly ash conveying device.

6. The fly ash and organic waste liquid prilling system of claim 5, wherein: The waste liquid tank is equipped with a stirring mechanism.

7. The fly ash and organic waste liquid prilling system of claim 6, wherein: The mixer is equipped with an atomizing nozzle.

8. The fly ash and organic waste liquid prilling system of claim 7, wherein: The mixing device is connected with the granulator through a mixing conveying device.

9. The fly ash and organic waste liquid prilling system of claim 8, wherein: The granulator is connected with the screening machine through a granule conveying device. The screening machine is connected with the fly ash conveying device through a substandard material conveying device.

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