Waste incineration fly ash supercooled water activation device and fly ash recycling system
By mixing waste incineration fly ash with supercooled water, forming a supercooled state and rupturing the surface reaction product, the problems of high energy consumption and low efficiency in the prior art are solved, and efficient fly ash activation and hydrated lime recycling are achieved.
Patent Information
- Application Number
- CN202421217164.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The existing fly ash activation technology has high energy consumption and low efficiency, and cannot completely expose unreacted ripped lime, resulting in low recycling efficiency of ripped lime.
The supercooled water activation device is used to mix the waste incinerated fly ash with supercooled water to form a supercooled state, rupture the surface reaction product, exposing unreacted hydrated lime, and increasing the specific surface area of the fly ash.
It significantly improves the activation efficiency of waste incineration fly ash and the recycling efficiency of squeezing lime, reduces energy consumption and reduces operating costs.
Smart Images
Figure CN222446460U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of waste incineration fly ash treatment, and relates to a waste incineration fly ash supercooling water activation device and a fly ash recycling system. Background Art
[0002] Waste incineration flue gas usually needs to be dry-deacidified with slaked lime before being discharged or undergoing subsequent purification processes. However, during the dry deacidification process, the slaked lime cannot react completely, and the reaction products formed by the waste incineration flue gas during the dry deacidification process are coated on the surface of the unreacted slaked lime particles, thereby forming waste incineration fly ash. In order to make full use of this part of the unreacted slaked lime particles in the waste incineration fly ash, it is usually necessary to destroy the reaction products on the surface of the slaked lime particles through physical or chemical actions, that is, to activate the waste incineration fly ash, and then transport the activated waste incineration fly ash to the dry deacidification process for recycling.
[0003] Currently, there are relatively few research programs on fly ash activation. Existing fly ash activation technologies usually use mechanical activation. Mechanical activation uses devices such as grinders to reduce the overall particle size of fly ash, increase its specific surface area, and thus expose unreacted slaked lime.
[0004] However, the existing fly ash activation technology has high energy consumption and is usually equipped with a grinder, Roots blower and heating elements, with a power of tens or even hundreds of kilowatts, and its economy is very general. Secondly, the existing fly ash direct circulation technology or fly ash mechanical activation technology cannot expose all the unreacted slaked lime, resulting in low slaked lime recycling efficiency. Utility Model Content
[0005] In view of this, the purpose of the utility model is to provide a waste incineration fly ash supercooled water activation device and a fly ash recycling system to fully expose the unreacted slaked lime in the waste incineration fly ash, thereby improving the recycling efficiency of the slaked lime in the waste incineration fly ash and the economy of the waste incineration fly ash.
[0006] In order to achieve the above object, the utility model provides the following technical solutions:
[0007] A waste incineration fly ash supercooled water activation device comprises a supercooled water system and a fly ash activation chamber, wherein the fly ash activation chamber has a fly ash inlet, an activated fly ash outlet and a supercooled water inlet connected to the supercooled water system, so that supercooled water and waste incineration fly ash are injected into the fly ash activation chamber, so that the waste incineration fly ash is converted into a supercooled state under the action of the supercooled water, so that the surface reaction products of the waste incineration fly ash are broken in the supercooled state, exposing the unreacted slaked lime inside the fly ash, obtaining activated fly ash, and completing the activation of the waste incineration fly ash.
[0008] Furthermore, the supercooled water system includes a supercooled water generating device, a supercooled water atomizing nozzle, and a supercooled water pipe for connecting the supercooled water generating device and the supercooled water atomizing nozzle, and the supercooled water atomizing nozzle is arranged at the supercooled water inlet to atomize the supercooled water entering the fly ash activation chamber and then mix it with the waste incineration fly ash.
[0009] Furthermore, the fly ash inlet is connected to a fly ash temporary storage bucket, which is used to store waste incineration fly ash, and a first spiral feeding device connected to a fly ash activation chamber is provided at the bottom of the fly ash temporary storage bucket to quantitatively transport the fly ash in the fly ash temporary storage bucket to the fly ash activation chamber.
[0010] Furthermore, the supercooled water atomizing nozzle is arranged adjacent to or at the center of the discharge port of the first spiral feeding device, so as to mix the supercooled water with the waste incineration fly ash in time after being atomized.
[0011] Furthermore, a second spiral feeding device is provided at the bottom of the fly ash activation chamber to output the activated fly ash in the fly ash activation chamber.
[0012] A fly ash recycling system comprises a spray tower for flue gas deacidification, a spiral feeder connected to the spray tower for collecting and conveying fly ash, and the waste incineration fly ash supercooling water activation device, wherein the spiral feeder is connected to the fly ash inlet of the fly ash activation chamber, and the activated fly ash outlet of the fly ash activation chamber is connected to a distributor arranged on the spray tower.
[0013] Furthermore, a bag filter is connected to the smoke outlet of the spray tower, and the fly ash in the bag filter is transported to the fly ash inlet of the fly ash activation chamber via a screw conveyor.
[0014] The beneficial effects of the utility model are:
[0015] The utility model provides a waste incineration fly ash supercooled water activation device and a fly ash recycling system. After supercooled water is mixed with waste incineration fly ash, the waste incineration fly ash forms a supercooled state, and the surface reaction products of the waste incineration fly ash rupture in the supercooled state, exposing the unreacted slaked lime inside the fly ash. At the same time, the supercooled water has a humidifying effect on the fly ash, promoting further expansion of the fly ash surface products, thereby intensifying the rupture effect, increasing the specific surface area of the fly ash, and further realizing the activation of the waste incineration fly ash, and can significantly improve the activation efficiency of the waste incineration fly ash, thereby improving the deacidification efficiency of the unreacted slaked lime in the fly ash.
[0016] Secondly, the waste incineration fly ash supercooled water activation device overcomes the problems of poor fly ash breakage effect and insufficient water penetration in the fly ash activation technology in the prior art, and the main energy-consuming equipment used is only a supercooled water generating device. Compared with the grinder, Roots blower and heating element in the prior art, the energy consumption of the waste incineration fly ash supercooled water activation device and method is lower than that of the mechanical activation technology, so that the operating cost of the fly ash recycling system is lower and the fly ash activation rate is higher.
[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:
[0019] Figure 1 It is a structural schematic diagram of a waste incineration fly ash supercooled water activation device;
[0020] Figure 2 The figure is a structural schematic diagram of a fly ash recycling system.
[0021] Figure numerals: supercooled water generating device 1, fly ash temporary storage bucket 2, atomizing nozzle 3, first spiral feeding device 4, second spiral feeding device 5, fly ash activation chamber 6, spray tower 7, bag dust collector 8. DETAILED DESCRIPTION
[0022] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.
[0023] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0025] Example 1
[0026] See also Figure 1 , which is a waste incineration fly ash supercooled water activation device, comprising a supercooled water system and a fly ash activation chamber 6, wherein the fly ash activation chamber 6 has a fly ash inlet, an activated fly ash outlet and a supercooled water inlet connected to the supercooled water system, and supercooled water and waste incineration fly ash are injected into the fly ash activation chamber 6, so that the surface reaction products of the waste incineration fly ash are ruptured in a supercooled state, exposing the unreacted slaked lime inside the fly ash, and at the same time, the supercooled water has a humidifying effect on the fly ash, promoting further expansion of the fly ash surface products, thereby intensifying the rupture effect, increasing the specific surface area of the fly ash, and further realizing the activation of the waste incineration fly ash.
[0027] Specifically, the supercooled water system includes a supercooled water generating device 1, a supercooled water atomizing nozzle 3, and a supercooled water pipe for connecting the supercooled water generating device 1 and the supercooled water atomizing nozzle 3, and the supercooled water atomizing nozzle 3 is arranged at the supercooled water inlet to atomize the supercooled water entering the fly ash activation chamber 6 and then mix it with the waste incineration fly ash.
[0028] Furthermore, the fly ash inlet is connected to the fly ash temporary storage bucket 2, and the fly ash temporary storage bucket 2 has a garbage fly ash inlet connected to the garbage fly ash conveying pipeline in the dry flue gas deacidification system, so as to connect the garbage incineration fly ash in the dry flue gas deacidification system to the fly ash activation chamber 6 for activation treatment.
[0029] Furthermore, a first spiral feeding device 4 connected to the fly ash activation chamber 6 is provided at the bottom of the fly ash temporary storage hopper 2 to quantitatively transport the fly ash in the fly ash temporary storage hopper 2 to the fly ash activation chamber 6 .
[0030] Preferably, the discharge port of the first spiral feeding device 4 is arranged at the top of the fly ash activation chamber 6 .
[0031] Preferably, the supercooled water atomizing nozzle 3 is arranged adjacent to or at the center of the discharge port of the first spiral feeding device 4, so as to facilitate timely mixing with the waste incineration fly ash after supercooled water atomization and improve the uniformity of mixing.
[0032] Furthermore, a second spiral feeding device 5 is provided at the bottom of the fly ash activation chamber 6 to transport the activated fly ash in the fly ash activation chamber 6 to the flue for dry flue gas deacidification.
[0033] Preferably, the first screw feeding device 4 and the second screw feeding device 5 are both controlled by variable frequency motors to facilitate quantitative conveying of fly ash.
[0034] It should be noted that the waste incineration fly ash supercooled water activation device in the present application can not only be used to activate the waste incineration fly ash produced in the dry deacidification system, but can also be used to activate the waste incineration fly ash obtained by treating flue gas deacidification in other flue gas treatment processes. This embodiment only uses the waste incineration fly ash produced by dry flue gas deacidification as an example for illustration and does not serve as a limitation.
[0035] Example 2
[0036] A method for supercooled water activation of waste incineration fly ash, comprising the following steps:
[0037] Collection: In the flue gas deacidification system, the waste incineration fly ash generated after the waste incineration flue gas reacts with slaked lime during the deacidification process;
[0038] Supercooled water activation: Mix the waste incineration fly ash with supercooled water, and convert the waste incineration fly ash into a supercooled state under the action of supercooled water, so that the surface reaction products of the waste incineration fly ash are broken in the supercooled state, exposing the unreacted slaked lime inside the fly ash, obtaining activated fly ash, and completing the activation of the waste incineration fly ash.
[0039] Preferably, the supercooled water is in an atomized state when mixed with the waste incineration fly ash. Specifically, an atomizing nozzle can be used to spray the supercooled water into the waste incineration fly ash.
[0040] Preferably, the method further comprises recycling: returning part or all of the activated fly ash after supercooled water activation to the flue or deacidification device in the flue gas deacidification system for flue gas deacidification.
[0041] The deacidification device can be specifically configured as a spray tower.
[0042] Example 3
[0043] See also Figure 2 A fly ash recycling system, which includes a spray tower 7 for flue gas deacidification in the prior art, and a spiral feeder (not shown) connected to the spray tower 7 for collecting and transporting fly ash. The key point is that it also includes the garbage incineration fly ash supercooling water activation device described in Example 2, the spiral feeder is connected to the garbage incineration fly ash inlet of the fly ash temporary storage hopper, and the second spiral feeding device 5 in the garbage incineration fly ash supercooling water activation device is connected to a distributor (not shown) arranged on the spray tower 7.
[0044] Optionally, a bag filter 8 connected to the smoke outlet of the spray tower 7 is further included, and the fly ash in the bag filter 8 is transported to the fly ash temporary storage hopper 2 via a screw conveyor (not shown).
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.
Claims
1. A waste incineration fly ash supercooled water activation device, characterized in that: The invention comprises a supercooled water system and a fly ash activation chamber, wherein the fly ash activation chamber has a fly ash inlet, an activated fly ash outlet and a supercooled water inlet connected to the supercooled water system, so that supercooled water and waste incineration fly ash are injected into the fly ash activation chamber, so that the waste incineration fly ash is converted into a supercooled state under the action of the supercooled water, so that the surface reaction products of the waste incineration fly ash are broken in the supercooled state, exposing the unreacted slaked lime inside the fly ash, thereby obtaining activated fly ash and completing the activation of the waste incineration fly ash.
2. The waste incineration fly ash supercooled water activation device according to claim 1, characterized in that: The supercooled water system includes a supercooled water generating device, a supercooled water atomizing nozzle, and a supercooled water pipe for connecting the supercooled water generating device and the supercooled water atomizing nozzle, and the supercooled water atomizing nozzle is arranged at the supercooled water inlet to atomize the supercooled water entering the fly ash activation cavity and then mix it with the waste incineration fly ash.
3. The waste incineration fly ash supercooled water activation device according to claim 2, characterized in that: The fly ash inlet is connected to a fly ash temporary storage hopper, which is used to store waste incineration fly ash. A first spiral feeding device connected to a fly ash activation chamber is provided at the bottom of the fly ash temporary storage hopper to quantitatively transport the fly ash in the fly ash temporary storage hopper to the fly ash activation chamber.
4. The waste incineration fly ash supercooled water activation device according to claim 3 is characterized in that: The supercooled water atomizing nozzle is arranged adjacent to or at the center of the discharge port of the first spiral feeding device, so as to mix the supercooled water with the waste incineration fly ash in time after being atomized.
5. The waste incineration fly ash supercooled water activation device according to claim 3, characterized in that: A second spiral feeding device is provided at the bottom of the fly ash activation chamber to output the activated fly ash in the fly ash activation chamber.
6. A fly ash recycling system, comprising a spray tower for flue gas deacidification, and a spiral feeder connected to the spray tower for collecting and conveying fly ash, characterized in that: It also includes a waste incineration fly ash supercooled water activation device according to any one of claims 1 to 5, wherein the spiral feeder is connected to the fly ash inlet of the fly ash activation chamber, and the activated fly ash outlet of the fly ash activation chamber is connected to the distributor arranged on the spray tower.
7. The fly ash recycling system according to claim 6, characterized in that: A bag filter is connected to the smoke outlet of the spray tower, and the fly ash in the bag filter is transported to the fly ash inlet of the fly ash activation chamber through a screw conveyor.