Fly ash and organic waste liquid granulation system and method
By designing fly ash and organic waste liquid granulation systems, the problems of high smoke rate and serious nodules in oxygen-rich side blowers are solved, and efficient heat energy utilization and production cycle extension are achieved.
Patent Information
- Application Number
- CN202510194855.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-04-08
AI Technical Summary
In the high-temperature melting process of oxygen-rich side blower, improper treatment of fly ash and organic waste liquid leads to high smoke and serious nodules, affecting the flue gas extraction and furnace production cycle.
A fly ash and organic waste liquid granulation system is designed, including fly ash unpacking device, metering and conveying device, mixing device, granulator and screening machine. Through unpacking, stirring, granulation and screening processes, pelletized materials with high molding rate and compressive strength can be produced to reduce the smoke rate and nodule risk.
It improves the thermal energy utilization rate of organic waste liquid, reduces the smoke rate, improves nodule problem, extends the production cycle of the furnace, and realizes an automated and efficient process flow.
Smart Images
Figure CN119771268A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of comprehensive recycling of hazardous wastes, and specifically relates to a fly ash and organic waste liquid granulation system and method. Background Art
[0002] In recent years, with the rapid development of comprehensive recycling and utilization technology for hazardous waste, fly ash and organic waste liquid treatment technology has been continuously innovated and broken through, from the original safe landfill, incineration and other disposal technologies to resource-based comprehensive recycling and utilization technology; among them, the oxygen-enriched side-blown furnace high-temperature melting technology has become the mainstream process in the industry.
[0003] At present, in the high-temperature melting process of the oxygen-enriched side-blown furnace, fly ash and organic waste liquid are mixed with other raw materials and auxiliary materials and then sent directly to the oxygen-enriched side-blown furnace for high-temperature melting treatment; in the process of dropping materials, the organic waste liquid did not fall into the molten pool, but was burned in the preheating zone on the top of the furnace, so that it could not provide heat to the melting zone; and the fly ash is too fine in particle size and is easily carried away by the rising flue gas during the falling process, resulting in a high smoke dust rate in the oxygen-enriched side-blown furnace. Part of the fly ash will adhere to the smoke outlet of the oxygen-enriched side-blown furnace and the inner wall of the waste heat boiler inlet. Under high temperature conditions, the nodule formation speed is fast and the nodule area is large and thick, which seriously affects the flue gas extraction and eventually requires the furnace to be shut down for treatment. Summary of the invention
[0004] In view of this, the purpose of the present invention is to provide a fly ash and organic waste liquid granulation system and method, so as to improve the thermal energy utilization rate of the organic waste liquid, reduce the smoke rate, greatly improve the nodulation problem, and extend the furnace production cycle.
[0005] The present invention solves the above problems by the following technical means:
[0006] A fly ash and organic waste liquid granulation system comprises 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, wherein the discharge end of the fly ash unpacking device is connected to the feed end of the fly ash metering and conveying device, the discharge end of the fly ash metering and conveying device is connected to the feed end of the mixing device, the discharge end of the waste liquid tank is connected to the feed end of the waste liquid conveying device, the discharge end of the waste liquid conveying device is connected to the feed end of the mixing device, the discharge end of the mixing device is connected to the feed end of the granulator, and the discharge end of the granulator is connected to the feed end of the screening machine.
[0007] Furthermore, the fly ash unpacking device includes a fly ash bag lifting device, an unpacking machine and a dust collector. The unpacking machine includes a closed chamber and a bag breaking cone knife arranged in the closed chamber. An opening and closing door is arranged on one side of the closed chamber. The fly ash bag lifting device is connected to the closed chamber, and the fly ash bag is lifted in and out through the opening and closing door. The air inlet end of the dust collector is connected to the closed chamber.
[0008] Furthermore, the discharge end of the closed chamber is connected to a buffer bin, the discharge end of the buffer bin is connected to the feed 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 feed 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 discharging end of the mixing device is connected to the discharging end of the granulator through a mixing conveying device.
[0013] Furthermore, the discharging end of the granulator is connected to the feeding end of the screening machine through a granule 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 comprises the following steps:
[0016] S1: The bagged fly ash is unpacked and 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 into the mixing device according to the proportion;
[0018] S3: fully stirring the materials through a mixing device to obtain a mixture;
[0019] S4: conveying the mixed material to a granulator, and pressing and molding the material by the granulator;
[0020] S5: The materials processed by the granulator are transported to the screening machine to screen qualified granules and defective granules and powder;
[0021] S6: Qualified granular materials are output through the qualified material conveying device, and are temporarily stored for use after being naturally dried; defective granules and powder are conveyed to the fly ash conveying device through the defective material conveying device, and are re-mixed and granulated.
[0022] Beneficial effects of the present invention:
[0023] 1. This application matches and utilizes fly ash and organic waste liquid as two types of raw materials, strictly controls the moisture content range of the mixed material after stirring, and uses a granulator for pressing, which can effectively ensure the pressing rate and compressive strength. At the same time, the end is matched with a screening machine to distinguish granules with qualified size and strength. The defective granules and unpressed powders are finally returned to the front end of the system to participate in stirring and pressing again. It has the advantages of high one-time pressing rate and high compressive strength of granules. The granules are then melted at high temperature in an oxygen-enriched side-blown furnace, which improves the thermal energy utilization rate of organic waste liquid, reduces the smoke rate, greatly improves the problem of nodules, and extends the production cycle of the furnace.
[0024] 2. This application includes the unloading and caching of fly ash and organic waste liquid, stirring and mixing, granulation pressing and molding, screening and other processes. A bag unpacker is configured for fly ash unloading and is tightly connected to the buffer bin. The bag unpacker is equipped with a dust collector to prevent the secondary dust generated during the unpacking and unloading of fly ash from spreading and polluting the environment. The fly ash collected by the dust collector can be returned to the buffer bin. The mixing device is designed with an atomizing nozzle to replenish water to the mixture in time to ensure that the moisture content meets the pressing requirements. Each link in the system is connected by a conveying device, with a high level of automation, simple process operation, short process and low equipment investment. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0026] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present invention. DETAILED DESCRIPTION
[0027] The present invention will be described in detail below with reference to the accompanying drawings.
[0028] like Figure 1 As shown, on the one hand, 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 feed end of the fly ash metering and conveying device, the discharge end of the fly ash metering and conveying device is connected to the feed end of the mixing device, the discharge end of the waste liquid tank is connected to the feed end of the waste liquid conveying device, the discharge end of the waste liquid conveying device is connected to the feed end of the mixing device, the discharge end of the mixing device is connected to the feed end of the granulator, and the discharge end of the granulator is connected to the feed end of the screening machine.
[0029] The fly ash unpacking device includes a fly ash bag lifting device 1, an unpacking machine 8 and a dust collector 5. The unpacking machine includes a closed chamber 3 and a bag breaking cone 4 arranged in the closed chamber. A door 2 is arranged on one side of the closed chamber. The fly ash bag lifting device is connected to the closed chamber, and the fly ash bag is lifted in and out through the door. The air inlet end of the dust collector is connected to the closed chamber.
[0030] The discharge end of the closed chamber is connected to a buffer bin 7, the discharge end of the buffer bin is connected to the feed 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 feed 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 discharging end of the mixing device is connected to the discharging end of the granulator through the mixing conveying device 13 .
[0035] The discharge end of the granulator is connected to the feed end of the sieving machine through a 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 lifting device uses an electric hoist to lift the fly ash ton bag into the closed chamber of the unpacking machine. The closed chamber 3 is facing the fly ash bag lifting device 1. The side is an opening and closing door 2 for the entry and exit of the fly ash ton bag. The other side and top are fully enclosed. A bag breaking cone 4 is designed at the bottom and is tightly connected to the buffer bin 7. The bag dust collector 5 is used to collect dust in the closed chamber 3, so that the closed chamber 3 is always in a slightly negative pressure operation state, and 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 mix the fly ash and organic waste liquid, and is equipped with an atomizing nozzle 12 to adjust the moisture content of the material in time. The granulator is a high-pressure ball press; the total pressure is 600t; the screening machine 16 is a vibrating screen, and the screen size is 25mm×25mm. The stirring mechanism 21 can be at least one of electric stirring and pneumatic stirring. The waste liquid conveying device 22 is used to convey the organic waste liquid to 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] On the other hand, this embodiment discloses a method using the above-mentioned fly ash and organic waste liquid granulation system, comprising the following steps:
[0039] S1: The bagged fly ash is unpacked and 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 into the mixing device according to the proportion;
[0041] S3: fully stirring the materials through a mixing device to obtain a mixture;
[0042] S4: conveying the mixed material to a granulator, and pressing and molding the material by the granulator;
[0043] S5: The materials processed by the granulator are transported to the screening machine to screen qualified granules and defective granules and powder;
[0044] S6: Qualified granular materials are output through the qualified material conveying device, and are temporarily stored for use after being naturally dried; defective granules and powder are conveyed to the fly ash conveying device through the defective material conveying device, and are re-mixed and granulated.
[0045] In the above S1, in the production site, the bagged fly ash is transferred to the bottom of the electric hoist by an engineering vehicle, and the bag is manually hung and lifted, and then the door is opened. After the bagged fly ash is hoisted to the closed chamber, the door is closed, and the bagged fly ash is lowered to collide with the bag-breaking cone knife, so that the fly ash bag breaks and falls into the buffer bin. At the same time, the organic waste liquid transported by the tank truck or the organic waste liquid in ton barrels is transported to the waste liquid tank for temporary storage through the waste liquid feeding device; the waste liquid feeding device includes a corresponding pump and a corresponding pipeline.
[0046] In the above S2, the proportion of fly ash and organic waste liquid is formulated, the fly ash in the buffer bin is quantitatively and continuously fed according to the batching list through an electronic belt scale; the organic waste liquid is quantitatively and continuously fed according to the batching list through 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 through the fly ash conveying device.
[0047] In the above S3, the added fly ash and organic waste liquid are fully stirred in the mixing device. The operator observes the moisture content of the mixed material in the mixing device and can adjust and control it in time by adding water through the atomizing nozzle to obtain a mixed material.
[0048] In the above S4, the mixed material is transported to the granulator through the mixed material conveying device 13, and the granulator performs high-pressure pressing and granulation. During the process, most of the mixed material is pressed and formed into initial granules, and a small part of the mixed material is not pressed and formed and remains as powder.
[0049] In the above S5, the initial granular material and the powder are sent to the screening machine through the granular material conveying device 15, and the output of the screened material is the qualified granular material, and the screened material is the defective granular material and the powder.
[0050] In the above S6, the qualified granular material is transported to the underground material pit through the qualified material conveying device 17, and is temporarily stored for use after being naturally dried; the defective granular material and powder are returned to the fly ash conveying device through the defective material conveying device 18, and are re-mixed and granulated.
[0051] The fly ash includes one or more of fly ash from the incineration of hazardous waste, fly ash from the incineration of domestic waste, and smoke generated in the smelting industry.
[0052] The organic waste liquid includes one or more of distillation residue, leachate, industrial waste water and waste organic solvent.
[0053] The fly ash and organic waste liquid proportion 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 molding is 90%.
[0056] The qualified granular materials account for 87%, and the defective granular materials and powder materials account for 13%.
[0057] The qualified granular material is an ellipsoid 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 solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.
Claims
1. A fly ash and organic waste liquid granulation system, characterized in that: It 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 feed end of the fly ash metering and conveying device, the discharge end of the fly ash metering and conveying device is connected to the feed end of the mixing device, the discharge end of the waste liquid tank is connected to the feed end of the waste liquid conveying device, the discharge end of the waste liquid conveying device is connected to the feed end of the mixing device, the discharge end of the mixing device is connected to the feed end of the granulator, and the discharge end of the granulator is connected to the feed end of the screening machine.
2. The fly ash and organic waste liquid granulation system according to claim 1, characterized in that: The fly ash unpacking device includes a fly ash bag lifting device, an unpacking machine and a dust collector. The unpacking machine includes a closed chamber and a bag breaking cone arranged in the closed chamber. An opening and closing door is arranged on one side of the closed chamber. The fly ash bag lifting device is connected to the closed chamber, and the fly ash bag is lifted in and out through the opening and closing door. The air inlet end of the dust collector is connected to the closed chamber.
3. The fly ash and organic waste liquid granulation system according to claim 2, characterized in that: The discharge end of the closed chamber is connected to a buffer bin, the discharge end of the buffer bin is connected to the feed 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.
4. The fly ash and organic waste liquid granulation system according to claim 3 is characterized in that: 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.
5. The fly ash and organic waste liquid granulation system according to claim 4, characterized in that: The waste liquid tank is equipped with a stirring mechanism, and the feed end of the waste liquid tank is connected with a waste liquid feeding device.
6. The fly ash and organic waste liquid granulation system according to claim 5, characterized in that: The mixer is equipped with an atomizing nozzle.
7. The fly ash and organic waste liquid granulation system according to claim 6, characterized in that: The discharging end of the mixing device is connected to the discharging end of the granulator through the mixing conveying device.
8. The fly ash and organic waste liquid granulation system according to claim 7, characterized in that: The discharging end of the granulator is connected with the feeding end of the screening machine through a granule conveying device.
9. The fly ash and organic waste liquid granulation system according to claim 8, characterized in that: The qualified material discharging end of the screening machine is connected with a qualified material conveying device, and the defective material discharging end of the screening machine is connected with a fly ash conveying device through the defective material conveying device.
10. A method using the fly ash and organic waste liquid granulation system as claimed in claim 9, characterized in that: The steps include: S1: The bagged fly ash is unpacked and added to the buffer bin, and the organic waste liquid is added to the waste liquid tank through the waste liquid feeding device; S2: Fly ash and organic waste liquid are added into the mixing device according to the proportion; S3: fully stirring the materials through a mixing device to obtain a mixture; S4: conveying the mixed material to a granulator, and pressing and molding the material by the granulator; S5: The materials processed by the granulator are transported to the screening machine to screen qualified granules and defective granules and powder; S6: Qualified granular materials are output through the qualified material conveying device, and are temporarily stored for use after being naturally dried; defective granules and powder are conveyed to the fly ash conveying device through the defective material conveying device, and are re-mixed and granulated.