System for controlling recycling amount of waste incineration fly ash in real time
Detect the pH value of waste incineration flying ash in real time to determine the content of cooked lime, and dynamically adjust the volume of flyy ash cycles, solve the problem of unable to monitor and adjust in existing technology, and improve the efficiency of lime use and the efficiency of smoke dehydration. Save operating costs.
Patent Information
- Application Number
- CN202420993159.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-08
AI Technical Summary
The prior art cannot monitor the residual ripe lime content in waste incineration fly ash in real time, making it difficult to adjust the fly ash circulation in real time, resulting in waste of resources and inefficient treatment.
Through real -time detection of the pH value in the fly ash to determine the content of residual lime, and dynamically adjust the circulation volume of cooked lime, use the dehydrous acid reactor in the system, the dust removal unit, the fly ash storage unit, the fly ash online sampling pH measurement unit, the flyy ash cycle cycle Units and fly ash are not harmless to dispose of units to achieve real -time control of flying ash cycle.
Improve the efficiency of lime use and the efficiency of flue gas dehydration, reduce acid gas emissions, improve resource utilization, save operating costs, and reduce system power consumption.
Smart Images
Figure CN222385604U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of garbage incineration, and relates to a system for real-time control of the recycling amount of fly ash from garbage incineration. Background Art
[0002] Waste incineration power generation is a way of generating electricity using the heat energy of waste. During the incineration process, fly ash and other residues will be produced. Fly ash contains unreacted slaked lime, which can be used to adsorb acidic gases for flue gas deacidification, improve deacidification efficiency and save operating costs. Existing technologies usually recycle fly ash for deacidification. However, due to the uncertainty of the residual slaked lime content in fly ash, it is difficult to accurately control the circulation rate, resulting in poor slaked lime utilization efficiency and deacidification efficiency.
[0003] The existing technology mainly has the following shortcomings: it is impossible to monitor the residual slaked lime content in the fly ash in real time, and it is difficult to adjust the fly ash circulation volume in real time, resulting in waste of resources and low processing efficiency.
[0004] Therefore, a system for real-time monitoring of the residual slaked lime (alkaline substance) content in fly ash is currently provided to dynamically adjust the circulation volume, improve the slaked lime utilization efficiency and deacidification efficiency, and save operating costs. Utility Model Content
[0005] In view of this, the purpose of the utility model is to provide a system for real-time control of the recycling amount of waste incineration fly ash, by real-time detection of the pH value in the fly ash to determine the residual slaked lime content, and then dynamically adjust the recycling amount of slaked lime to improve the utilization efficiency of slaked lime and save operating costs.
[0006] In order to achieve the above object, the utility model provides the following technical solutions:
[0007] A system for real-time control of the recycling amount of fly ash from garbage incineration, comprising a deacidification reactor, a dust removal unit, a fly ash storage unit, a fly ash online sampling pH measurement unit, a fly ash circulation unit and a fly ash harmless disposal unit, wherein the deacidification reactor, the dust removal unit and the fly ash storage unit are sequentially connected along the fly ash conveying direction;
[0008] The fly ash storage unit is connected with a fly ash online sampling pH measuring unit for detecting the pH value of the fly ash inside it, and two ash conveying pipelines respectively connected to a fly ash circulation unit and a fly ash harmless disposal unit are provided at the ash outlet of the fly ash storage unit, and the fly ash circulation unit is connected to a deacidification reactor;
[0009] When the pH value is greater than 8, the fly ash storage unit is connected to the fly ash circulation unit and the deacidification reactor in sequence through an ash conveying pipeline to recycle the fly ash. When the pH value is less than 8, the fly ash secondary storage unit is connected to the fly ash harmless disposal unit through an ash conveying pipeline to discharge the fly ash.
[0010] Furthermore, the fly ash storage unit includes a primary fly ash storage unit and a secondary fly ash storage unit which are sequentially connected after the dust removal unit, and the fly ash online sampling PH measurement unit is arranged on the secondary fly ash storage unit, and the ash conveying pipelines respectively connected to the fly ash circulation unit and the fly ash harmless disposal unit are arranged at the ash outlet of the secondary fly ash storage unit.
[0011] Furthermore, an electric gate valve is provided at the ash outlet of the fly ash primary storage unit, and a quantitative screw conveying device is provided between the fly ash primary storage unit and the fly ash secondary storage unit to quantitatively convey fly ash from the fly ash primary storage unit to the fly ash secondary storage unit.
[0012] Furthermore, the storage capacity of the primary storage unit for transporting fly ash is 5-15 tons of fly ash, and the storage capacity of the secondary storage unit for fly ash is 0.2-1 ton of fly ash.
[0013] Furthermore, a weighing device 2 is provided at the bottom of the primary fly ash storage unit and the secondary fly ash storage unit to detect the fly ash content therein.
[0014] Furthermore, the fly ash online sampling pH measurement units are provided in three numbers and are evenly arranged along the circumference of the conical section of the fly ash secondary storage unit to improve the accuracy of pH measurement.
[0015] Furthermore, the deacidification reactor is also connected to a reagent supply unit to replenish the deacidification agent that has not been deacidified into the deacidification reactor.
[0016] Furthermore, it also includes a control system and two electric valves respectively arranged on two ash conveying pipelines connecting the fly ash circulation unit and the fly ash harmless disposal unit. The control system is electrically connected to the fly ash online sampling PH measurement unit and the electric valve to perform linkage control on the electric valve according to the detection results of the fly ash online sampling PH measurement unit.
[0017] The beneficial effects of the utility model are:
[0018] The utility model provides a system for real-time control of the recycling amount of fly ash recycled from garbage incineration. The system utilizes the alkaline property of slaked lime to determine the residual slaked lime content by real-time detection of the pH value in the fly ash, and then dynamically adjusts the recycling amount of slaked lime to improve the utilization efficiency of slaked lime; thereby ensuring that there is enough slaked lime for flue gas deacidification, improving the flue gas deacidification efficiency, reducing acid gas emissions, and improving resource utilization, saving operating costs, and reducing system power consumption.
[0019] 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
[0020] 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:
[0021] Figure 1 A partial structural diagram of a system for real-time control of the recycling amount of fly ash from waste incineration;
[0022] Figure 2 The diagram is a schematic diagram of the layout of a system for real-time control of the recycling amount of fly ash from waste incineration.
[0023] Figure numerals: primary fly ash storage unit 1, weighing device 2, quantitative screw conveying device 3, secondary fly ash storage unit 4, first fly ash online sampling PH measurement unit 5, second fly ash online sampling PH measurement unit 6, third fly ash online sampling PH measurement unit 7, electric gate valve 8. DETAILED DESCRIPTION
[0024] 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.
[0025] 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.
[0026] 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.
[0027] See also Figure 1-2 , which is a system for real-time control of the recycling amount of fly ash from garbage incineration, including a deacidification reactor, a dust removal unit, a primary fly ash storage unit, a secondary fly ash storage unit, a fly ash online sampling PH measurement unit, a fly ash circulation unit, a fly ash harmless disposal unit and a fresh agent supply unit;
[0028] The deacidification reactor, dust removal unit, primary fly ash storage unit 1 and secondary fly ash storage unit 4 are connected in sequence along the fly ash conveying direction, and a quantitative screw conveying device 3 is provided between the primary fly ash storage unit 1 and the secondary fly ash storage unit 4, and weighing devices 2 are provided at the bottom of the primary fly ash storage unit 1 and the secondary fly ash storage unit 4 to detect the fly ash content therein.
[0029] A fly ash online sampling PH measuring unit is connected to the lower part of the fly ash secondary storage unit 4 for detecting the PH value of the fly ash inside it, and two ash conveying pipelines respectively connected to the fly ash circulation unit and the fly ash harmless disposal unit are provided at the ash outlet of the fly ash secondary storage unit 4, and when the PH value is greater than 8, the fly ash secondary storage unit 4 is connected to the fly ash circulation unit and the deacidification reactor in sequence to recycle the fly ash; when the PH value is less than 8, the fly ash secondary storage unit 4 is connected to the fly ash harmless disposal unit to discharge the fly ash until the PH value is greater than 8 again.
[0030] Preferably, the deacidification reactor is also connected to a reagent supply unit to replenish the deacidification agent that has not been deacidified.
[0031] Specifically, the deacidification reactor is configured as a deacidification reaction tower, which is used for the waste incineration flue gas and the circulating fly ash to perform a deacidification reaction; the dust removal unit removes dust in the flue gas after the reaction, and sends the dust to the fly ash primary storage unit, and the deacidified flue gas is discharged through the chimney; the fly ash primary storage unit 1 can store 5-15 tons of fly ash, and the fly ash secondary storage unit 4 can store 0.2-1 ton of fly ash, and there is an electric gate valve 8 and a quantitative screw conveying device 3 between the two storage units;
[0032] The quantitative screw conveying device 3 conveys 0.2-0.7 tons of fly ash from the primary storage unit 1 to the secondary storage unit 4 at one time. After reaching the weight, the electric gate valve 8 is closed, and the fly ash (dust) in the secondary storage unit 4 is measured by the fly ash online sampling pH measuring unit.
[0033] The fly ash online sampling PH measurement unit can be specifically set to three, namely the first fly ash online sampling PH measurement unit 5, the second fly ash online sampling PH measurement unit 6 and the third fly ash online sampling PH measurement unit 7, and are evenly arranged along the circumference of the conical section of the fly ash secondary storage unit 4, so as to take out three fly ash samples in the fly ash secondary storage unit 4 at the same time for PH measurement, and calculate the PH average value, the PH average value is used to determine whether the fly ash in the fly ash secondary storage unit 4 is sent to the fly ash circulation unit or the fly ash harmless disposal unit. When the PH value is greater than 8, the fly ash secondary storage unit 4 is connected to the fly ash circulation unit and the deacidification reactor in sequence to recycle the fly ash; when the PH value is less than 8, the fly ash secondary storage unit 4 is connected to the fly ash harmless disposal unit to discharge the fly ash until the PH value is greater than 8 again;
[0034] When the fly ash weight in the primary fly ash storage unit 1 is less than 3 tons, the reagent supply unit is opened to spray fresh deacidifying agent into the deacidification reactor. Secondly, the reagent supply unit can also be used as an emergency disposal unit when the acid gas is too high (the pH value is too low).
[0035] Preferably, it also includes two electric valves (not shown) and a control system respectively arranged on two ash conveying pipes connected to the ash outlet of the fly ash secondary storage unit 4. The control system is electrically connected to the fly ash online sampling PH measurement unit and the electric valve, so as to perform linkage control on the electric valve according to the detection result of the fly ash online sampling PH measurement unit; that is, when the PH is greater than 8, the electric valve on the ash conveying pipe connected to the fly ash harmless disposal unit is closed, and the electric valve on the ash conveying pipe connected to the fly ash circulation unit is opened; when the PH is less than 8, the electric valve on the ash conveying pipe connected to the fly ash harmless disposal unit is opened, and the electric valve on the ash conveying pipe connected to the fly ash circulation unit is closed.
[0036] In another embodiment, the fly ash primary storage unit 1 and the fly ash secondary storage unit 4 can also be combined into one to form a fly ash storage unit, and the fly ash pH value in the fly ash storage unit can be directly detected and the fly ash flow direction can be confirmed by an online fly ash sampling PH measuring unit, and the fly ash flow direction can be changed in real time according to the real-time change of the PH value.
[0037] 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 system for real-time control of the recycling amount of fly ash from waste incineration, characterized in that: It includes a deacidification reactor, a dust removal unit, a fly ash storage unit, a fly ash online sampling PH determination unit, a fly ash circulation unit and a fly ash harmless disposal unit, wherein the deacidification reactor, the dust removal unit and the fly ash storage unit are connected in sequence along the fly ash conveying direction; The fly ash storage unit is connected with a fly ash online sampling pH measuring unit for detecting the pH value of the fly ash inside it, and two ash conveying pipelines respectively connected to a fly ash circulation unit and a fly ash harmless disposal unit are provided at the ash outlet of the fly ash storage unit, and the fly ash circulation unit is connected to a deacidification reactor; When the pH value is greater than 8, the fly ash storage unit is connected to the fly ash circulation unit and the deacidification reactor in sequence through the ash conveying pipeline to recycle the fly ash; when the pH value is less than 8, the fly ash storage unit is connected to the fly ash harmless disposal unit through the ash conveying pipeline to discharge the fly ash; The fly ash storage unit includes a primary fly ash storage unit and a secondary fly ash storage unit which are sequentially connected after the dust removal unit, and the fly ash online sampling PH measurement unit is arranged on the secondary fly ash storage unit, and the ash conveying pipelines respectively connected to the fly ash circulation unit and the fly ash harmless disposal unit are arranged at the ash outlet of the secondary fly ash storage unit.
2. The system for real-time control of the recycling amount of fly ash from waste incineration according to claim 1 is characterized in that: An electric gate valve is provided at the ash outlet of the fly ash primary storage unit, and a quantitative screw conveying device is provided between the fly ash primary storage unit and the fly ash secondary storage unit to quantitatively convey fly ash from the fly ash primary storage unit to the fly ash secondary storage unit.
3. The system for real-time control of the recycling amount of fly ash from waste incineration according to claim 1 is characterized in that: The storage capacity of the primary storage unit for transporting fly ash is 5-15 tons of fly ash, and the storage capacity of the secondary storage unit for fly ash is 0.2-1 ton of fly ash.
4. The system for real-time control of the recycling amount of fly ash from waste incineration according to claim 3 is characterized in that: A weighing device (2) is provided at the bottom of each of the primary fly ash storage unit and the secondary fly ash storage unit to detect the fly ash content therein.
5. The system for real-time control of waste incineration fly ash recycling volume according to claim 1, characterized in that: The fly ash online sampling pH measurement units are provided in three numbers and are evenly arranged along the circumference of the conical section of the fly ash secondary storage unit to improve the accuracy of pH measurement.
6. The system for real-time control of waste incineration fly ash recycling volume according to claim 1, characterized in that: The deacidification reactor is also connected to a reagent supply unit to replenish the deacidification agent that has not been deacidified into the deacidification reactor.
7. The system for real-time control of the recycling amount of fly ash from waste incineration according to claim 1 is characterized in that: It also includes a control system and two electric valves respectively arranged on two ash conveying pipelines connecting the fly ash circulation unit and the fly ash harmless disposal unit. The control system is electrically connected to the fly ash online sampling PH measurement unit and the electric valves to perform linkage control on the electric valves according to the detection results of the fly ash online sampling PH measurement unit.