Continuous fly ash activation and deacidification experiment system
By designing a continuous fly ash activation and deacidification experimental system, simulating the mixing of flue gas and activated fly ash, combining steam activation and mechanical activation technologies, the problem of difficulty in reproducing continuous waste incineration flue gas in the laboratory is solved, the fly ash activation rate and experimental efficiency are improved, and the research progress of fly ash activation technology is promoted.
Patent Information
- Application Number
- CN202421671169.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The existing technology is difficult to reproduce continuous waste incineration flue gas in the laboratory, resulting in slow progress in fly ash activation research, and the activation rate of existing fly ash activation technology is low, which cannot effectively solve the problems of large consumption of Chinese medicines for dry flue gas deacidification and large fly ash yield.
A continuous fly ash activation deacidification experimental system is designed, including heating device, steam generator, gas cylinder and steam activation device. By simulating the mixing of flue gas and activated fly ash, continuous experiments are achieved, and the fly ash activation efficiency is improved through the combination of steam activation and mechanical activation.
This experimental system can simulate the continuous waste incineration flue gas deacidation process in the laboratory, improves the fly ash activation rate, reduces the drug consumption and fly ash output, provides convenient experimental conditions, and accelerates the research progress of fly ash activation technology and flue gas dry deacidation technology.
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Figure CN222952315U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of garbage incineration treatment and relates to a continuous fly ash activation and deacidification experimental system. Background Art
[0002] The pollutants contained in garbage flue gas mainly include HCl, SO X 、NO X , heavy metals, dioxins, dust, etc., the waste incineration plant needs to be equipped with a corresponding flue gas purification system. Among them, the existing deacidification processes include conventional dry method, semi-dry method and wet method.
[0003] The conventional dry deacidification process is to spray slaked lime Ca(OH) 2 Spray into the reactor or flue to allow Ca(OH) 2 The surface of the particles directly contacts the acidic gas in the flue gas, producing a chemical neutralization reaction to generate harmless neutral salt particles, which then enter the downstream particulate matter removal equipment. In the dust collector, the reaction products are captured together with the flue gas dust and the unreacted absorbent to achieve the purpose of purifying the acidic gas. The dry purification process is simple, easy to operate, with low equipment cost, low operation and maintenance costs, and no waste liquid. However, the agent consumption is large, and the injection excess coefficient generally reaches more than 3. The fly ash output in the later stage is large, and the processing cost increases. In addition, the reaction products formed during the dry flue gas deacidification process are coated on the surface of the unreacted slaked lime particles. In order to reduce the agent consumption and improve the agent utilization rate, it is necessary to make full use of the unreacted slaked lime particles, destroy the reaction products on the surface of the slaked lime particles through physical or chemical actions, and expose the unreacted slaked lime (that is, fly ash activation).
[0004] At present, there are relatively few research programs on fly ash activation, and the existing fly ash activation technologies include steam activation and mechanical activation. Steam activation is to use high-temperature steam to expand the unreacted slaked lime in the fly ash, thereby exposing the unreacted slaked lime; mechanical activation is to reduce the overall particle size of the fly ash, increase its specific surface area, and thereby expose the unreacted slaked lime. However, the existing steam activation and mechanical activation fly ash activation rates are usually low, and they cannot solve the problems of large consumption of dry flue gas deacidification agents, large fly ash production in the later stage, and high processing costs. However, waste incineration is usually carried out in waste incineration plants, which are super-large equipment and difficult to reproduce in the laboratory. As a result, technicians cannot obtain continuous waste incineration flue gas in the laboratory, which is not conducive to the experimental research of the fly ash deacidification effect after activation, resulting in slow progress in fly ash activation research.
[0005] In order to better study fly ash activation technology and provide more fly ash activation solutions, it is urgently needed to provide a continuous fly ash activation and deacidification experimental system. Utility Model Content
[0006] In view of this, the purpose of the utility model is to provide a continuous fly ash activation and deacidification experimental system to provide a convenient experimental system for the research of fly ash activation technology, thereby accelerating the research progress of fly ash activation technology.
[0007] In order to achieve the above object, the utility model provides the following technical solutions:
[0008] A continuous fly ash activation and deacidification experimental system comprises a heating device, a first steam generator, a carbon dioxide gas cylinder, a sulfur dioxide gas cylinder, a hydrogen chloride gas cylinder, a dry mixer, a bag filter and a fly ash activation device, wherein the air inlet of the heating device is connected to air, and the air outlet is connected to the flue gas inlet of the dry mixer through a flue gas pipeline, so that the heated air is sent into the dry mixer through the flue gas pipeline;
[0009] The flue gas pipeline is connected to a first steam generator, a carbon dioxide gas cylinder, a sulfur dioxide gas cylinder and a hydrogen chloride gas cylinder through a gas pipe, so that the heated air in the flue gas pipeline is mixed with steam, carbon dioxide, sulfur dioxide and hydrogen chloride to form simulated flue gas for the experiment;
[0010] The activated fly ash inlet of the dry mixer is connected with a fly ash activation device, and the smoke outlet of the dry mixer is connected with a bag filter through a mixing pipeline.
[0011] Furthermore, the fly ash activation device is a steam activation device, which has a fly ash inlet, a steam inlet and a steam-activated fly ash outlet. The fly ash inlet is used for fly ash to be activated, the steam inlet is connected to a second steam generator, and the steam-activated fly ash outlet is connected to the activated fly ash inlet of the dry mixer through an activated fly ash pipeline.
[0012] Furthermore, experimental test holes are provided on the activated fly ash pipeline, the air pipe, the flue gas pipeline and the mixing pipeline to facilitate the collection of experimental data.
[0013] Furthermore, the heating device is an electric heater, and an air pump is provided at the air inlet of the heating device to pump air in the environment into the heating device.
[0014] Furthermore, the fly ash activation device is a mechanical activation device.
[0015] The beneficial effects of the utility model are:
[0016] The utility model provides a continuous fly ash activation and deacidification experimental system, which is equipped with a heating device, a steam generating device, and a SO 2 , HCl and CO 2The gas cylinder forms continuous simulated flue gas in the flue gas pipeline, which solves the problem of difficulty in obtaining continuous waste incineration flue gas in the prior art. The simulated flue gas and activated fly ash are mixed by the dry mixer 6, so that the dry flue gas deacidification process can be simulated in the laboratory and a continuous experiment can be realized.
[0017] The experimental system can be used for dry fly ash activation and deacidification research, and for performance testing of steam activation devices to calibrate their effects. It can also be used to study the effects of activated fly ash produced by different mixing ratios of steam and fly ash in steam activation devices on dry deacidification processes. It can also be used to study the effects of temperature, steam, SO 2 , HCl, CO 2 The influence of various factors such as concentration on the fly ash activation and deacidification process provides a convenient experimental system for the research of fly ash activation technology, thereby accelerating the research progress of fly ash activation technology and flue gas dry deacidification technology.
[0018] 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
[0019] 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:
[0020] Figure 1 It is a structural schematic diagram of a continuous fly ash activation and deacidification experimental system.
[0021] Figure numerals: heating device 1, first steam generator 2, carbon dioxide gas cylinder 3, sulfur dioxide gas cylinder 4, hydrogen chloride gas cylinder 5, dry mixer 6, bag filter 7, steam activation device 8, second steam generator 9, air pump 10. 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 continuous fly ash activation and deacidification experimental system, comprising a heating device 1, a first steam generator 2, a carbon dioxide gas cylinder 3, a sulfur dioxide gas cylinder 4, a hydrogen chloride gas cylinder 5, a dry mixer 6, a bag filter 7, a steam activation device 8 and a second steam generator 9, wherein the heating device 1 has an air inlet and an air outlet, the dry mixer 6 has a flue gas inlet, an activated fly ash inlet and a flue gas outlet, and the flue gas inlet and the activated fly ash inlet are arranged at one end of the dry mixer 6, and the flue gas outlet is arranged at the other end of the dry mixer 6;
[0027] The air inlet of the heating device 1 is connected to air, and the air outlet is connected to the smoke inlet of the dry mixer 6 through the smoke pipeline, so that the heated air is sent to the dry mixer 6 through the smoke pipeline, and the first steam generator 2, the carbon dioxide gas cylinder 3, the sulfur dioxide gas cylinder 4 and the hydrogen chloride gas cylinder 5 are connected to the smoke pipeline through the air pipe, so that the heated air in the smoke pipeline is mixed with steam, carbon dioxide, sulfur dioxide and hydrogen chloride to serve as simulated smoke for the experiment;
[0028] The activated fly ash inlet of the dry mixer 6 is connected to a steam activation device 8 to provide steam-activated fly ash to the dry mixer 6 through the steam activation device 8. The flue gas outlet of the dry mixer 6 is connected to a bag filter 7 through a mixing pipeline to perform a deacidification reaction between the steam-activated fly ash and the simulated flue gas in the bag filter 7 to remove SO in the simulated flue gas. 2, HCl, and collect the fly ash produced by dry deacidification.
[0029] Specifically, the steam activation device 8 has a fly ash inlet, a steam inlet and a steam-activated fly ash outlet. The fly ash inlet is used to add fly ash produced in the conventional dry deacidification reaction (i.e., fly ash to be activated). The steam inlet is connected to a second steam generator 9 to provide steam to the steam activation device 8 and activate the fly ash in the steam activation device 8. The steam-activated fly ash outlet is connected to the activated fly ash inlet of the dry mixer 6 through an activated fly ash pipeline.
[0030] Preferably, experimental test holes are provided on the activated fly ash pipeline, the air pipe, the flue gas pipeline and the mixing pipeline to facilitate the collection of experimental data.
[0031] The working principle of the above-mentioned continuous fly ash activation and deacidification experimental system is as follows:
[0032] The fly ash to be activated is manually added to the fly ash inlet of the steam activation device, and the 120-170°C steam generated by the second steam generator 9 is passed into the steam activation device 8 through the steam inlet. The steam and fly ash are fully in contact in the steam activation device, and the interior of the steam activation device is maintained at a constant temperature by electric heating. The activated fly ash flows out from the steam-activated fly ash outlet of the steam activation device and enters the activated fly ash inlet of the dry mixer.
[0033] After the air enters the electric heater through the air inlet of the heating device 1, it is heated to 130-200°C by electric heating. The hot air flows into the flue gas pipeline from the air outlet of the electric heater. The first steam generator 2 generates steam at 120-200°C and passes it into the flue gas pipeline. CO 2 / SO 2 The gas in the HCl gas cylinder is also introduced into the flue gas pipeline. By adjusting the flow of steam, air and each gas cylinder, simulated flue gas for experiment is configured in the flue gas pipeline. The simulated flue gas enters the flue gas inlet of the dry mixer through the flue gas pipeline.
[0034] After the activated fly ash and the simulated flue gas are fully mixed in the dry mixer, they flow out from the flue gas outlet of the dry mixer and enter the bag filter 7. The activated fly ash reacts with the simulated flue gas in the bag filter 7 to remove the SO in the simulated flue gas. 2 , HCl, and the treated flue gas is discharged from the outlet of the bag filter.
[0035] Specifically, the heating device 1 is an electric heater, and an air pump 10 is provided at the air inlet of the heating device 1 to pump air in the environment into the heating device 1 .
[0036] The experimental system heats air with steam, SO 2 , HCl and CO 2The simulated flue gas is formed, which solves the problem that it is difficult to obtain continuous waste incineration flue gas in the prior art. The simulated flue gas and activated fly ash are mixed by the dry mixer 6, so that the dry flue gas deacidification process can be simulated in the laboratory and a continuous experiment can be realized. The experimental system can be used for the performance test of the steam activation device in the dry fly ash activation and deacidification research to calibrate its effect. In addition, it can also be used to study the effect of activated fly ash produced by different mixing ratios of steam and fly ash in the steam activation device in the dry deacidification process. It can also be used to study the temperature, steam, SO 2 , HCl, CO 2 The influence of various factors such as concentration on the fly ash activation and deacidification process provides a convenient experimental system for the research of fly ash activation technology, thereby accelerating the research progress of fly ash activation technology and flue gas dry deacidification technology.
[0037] Example 2
[0038] The difference between this embodiment and embodiment 1 is that in this embodiment, the steam activation device 8 and the second steam generator 9 are not provided. Instead, the steam activation device 8 is replaced by a mechanical activation device to provide activated fly ash to the dry mixer 6 through the mechanical activation device, so as to study the application of the mechanical activation device in the fly ash activation and deacidification technology, and further provide experimental support for improving the mechanical activation device.
[0039] 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 continuous fly ash activation and deacidification experimental system, characterized in that: It includes a heating device, a first steam generator, a carbon dioxide gas cylinder, a sulfur dioxide gas cylinder, a hydrogen chloride gas cylinder, a dry mixer, a bag filter and a fly ash activation device, wherein the air inlet of the heating device is connected to air, and the air outlet is connected to the flue gas inlet of the dry mixer through a flue gas pipeline, so that the heated air is sent into the dry mixer through the flue gas pipeline; The flue gas pipeline is connected to a first steam generator, a carbon dioxide gas cylinder, a sulfur dioxide gas cylinder and a hydrogen chloride gas cylinder through a gas pipe, so that the heated air in the flue gas pipeline is mixed with steam, carbon dioxide, sulfur dioxide and hydrogen chloride to form simulated flue gas for the experiment; The activated fly ash inlet of the dry mixer is connected with a fly ash activation device, and the smoke outlet of the dry mixer is connected with a bag filter through a mixing pipeline.
2. The continuous fly ash activation and deacidification experimental system according to claim 1 is characterized by: The fly ash activation device is a steam activation device, which has a fly ash inlet, a steam inlet and a steam-activated fly ash outlet. The fly ash inlet is used for fly ash to be activated, and the steam inlet is connected to a second steam generator. The steam-activated fly ash outlet is connected to the activated fly ash inlet of the dry mixer through an activated fly ash pipeline.
3. The continuous fly ash activation and deacidification experimental system according to claim 2 is characterized in that: Experimental test holes are arranged on the activated fly ash pipeline, the air pipe, the flue gas pipeline and the mixing pipeline to facilitate the collection of experimental data.
4. The continuous fly ash activation and deacidification experimental system according to claim 1 is characterized in that: The heating device is an electric heater, and an air pump is provided at the air inlet of the heating device to pump air in the environment into the heating device.
5. The continuous fly ash activation and deacidification experimental system according to claim 1 is characterized by: The fly ash activation device is a mechanical activation device.