Thermal power plant solid waste roasting heat storage ceramsite production device and heat storage method thereof

Abstract

The invention discloses a thermal power plant solid waste roasting heat storage ceramsite production device and a heat storage method thereof, and belongs to the technical field of heat storage, the thermal power plant solid waste roasting heat storage ceramsite production device comprises a raw material mixing stirrer, the raw material mixing stirrer is connected with an aging warehouse through a belt conveyor, and the raw material mixing stirrer is used for uniformly mixing solid waste in a thermal power plant with sludge or clay; the ceramsite production raw materials are conveyed to an aging warehouse through a belt conveyor to be subjected to aging treatment; the outlet end of the aging warehouse is connected with the rotary kiln furnace after sequentially passing through the hopper, the granulator and the shaping machine, and the output end of the rotary kiln furnace is connected with the heat storage and heat preservation chamber and used for carrying out heat storage and energy storage on the formed hot-state ceramsite products. The method has the advantages that resources can be recycled, negative effects of wastes on the environment are reduced, and meanwhile, positive contributions are made to energy conservation, emission reduction, cost reduction and environment protection through efficient production and energy efficiency improvement.

Description

Technical Field

[0001] The invention belongs to the technical field of heat storage, and in particular relates to a device for producing heat storage ceramsite by roasting solid waste in a thermal power plant and a heat storage method thereof. Background Art

[0002] At present, the commonly used heat storage technologies in engineering include solid heat storage (sensible heat), water heat storage (sensible heat), phase change heat storage (latent heat + sensible heat), etc. Among them, water heat storage has the lowest cost, solid heat storage has the medium cost, and phase change heat storage has the higher cost. In terms of heat storage temperature range, the water heat storage temperature is generally below 100 degrees Celsius, and phase change heat storage is divided into high-temperature phase change heat storage, such as metal phase change heat storage temperature above 800 degrees, molten salt heat storage temperature range between 300 and 500 degrees, solid heat storage temperature range is larger, solid heat storage materials such as magnesium bricks, refractory bricks or high-temperature concrete have a heat storage temperature between 300 and 500 degrees. The development of new solid heat storage materials has become an important research and development direction for various energy groups.

[0003] At present, large domestic thermal power plants generate a large amount of solid waste such as fly ash, slag or desulfurization gypsum every day. In the previous few years when the real estate industry was developing rapidly, the solid waste of thermal power plants was sold to the real estate industry for the production of building materials or cement. However, the real estate industry has been sluggish in recent years, and many large thermal power plants have encountered difficulties in the sales and disposal of fly ash. Many power plants need to pay millions each year for the disposal of fly ash, slag or desulfurization gypsum. Many plants pay to hire people to take away the solid waste. Many power plants have long-term piles of large amounts of solid waste in their ash yards. The occupation of ash yards and long-term piles of solid waste are a headache for local governments and power plants. How to achieve the circular resource utilization of solid waste from thermal power plants has become a difficult problem facing many thermal power plants.

[0004] If we can utilize the surplus electricity from the peak-shaving and frequency-regulating operation of thermal power plants, use high-temperature roasting rotary kilns, and use the solid waste from power plants as raw materials to produce high-performance expanded clay, it can be used in the construction industry, as a base material for road paving, or as an admixture for the production of foamed concrete bricks, and can also be used as an ingredient in the water treatment industry or in agricultural planting matrices. Not only will the thermal power plant be turned into treasure, but the high-temperature expanded clay itself can be used as a heat storage material to achieve low-cost heat storage and energy storage, thereby achieving heat storage and energy storage for the peak-shaving and frequency-regulating electricity of thermal power units, and ensuring the supply of industrial steam and external heat under low load of thermal power units. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a thermal power plant solid waste roasting heat storage ceramsite production device and a heat storage method thereof in view of the deficiencies in the above-mentioned prior art, which is used to solve the technical problem that the solid waste of existing thermal power plants is piled up in ash yards, occupying a large amount of ash yard space, causing land waste and generating a large amount of solid waste disposal costs.

[0006] The present invention adopts the following technical solutions: A device for producing heat-storing ceramsite by roasting solid waste in a thermal power plant comprises a raw material mixer, which is connected to an aging warehouse via a belt conveyor. The raw material mixer is used to evenly mix solid waste in the thermal power plant with sludge or clay to obtain raw materials for ceramsite production, and the raw materials for ceramsite production are sent to the aging warehouse for aging treatment via the belt conveyor; the outlet end of the aging warehouse is connected to a rotary kiln furnace after passing through a hopper, a granulator and a shaping machine in sequence, and the output end of the rotary kiln furnace is connected to a heat storage and insulation chamber for storing heat and energy for the formed hot ceramsite products.

[0007] Preferably, the rotary kiln uses gas, coal or electric heating to achieve a high temperature roasting kiln environment.

[0008] Preferably, the rotary kiln and the heat storage and insulation chamber are both provided with electric heating units.

[0009] Preferably, the electric heating unit adopts electromagnetic heating or resistive heating.

[0010] Preferably, the heat storage and insulation chamber includes an insulation shell and an electric heating unit arranged inside the shell, and an air-water heat exchanger is arranged outside the heat storage and insulation chamber. The high-temperature expanded clay products produced by the rotary kiln are heat-stored and insulated in the heat storage and insulation chamber, and the feed water or heat network return water is sent to the air-water heat exchanger to be heated by the expanded clay and high-temperature air to generate industrial steam or hot water for external supply.

[0011] Preferably, an air-water heat exchanger is provided in the kiln tail smoke chamber to realize that the waste heat of the high-temperature flue gas discharged by the rotary kiln is used to heat the feed water or the return water of the heat network.

[0012] Preferably, the raw materials for producing ceramsite are fly ash, boiler slag or desulfurized gypsum produced by the boiler of thermal power units and other available solid wastes from thermal power plants.

[0013] Preferably, a kiln tail smoke chamber is provided at one end of the rotary kiln, and the kiln tail smoke chamber is connected to the dust collector of the power station boiler.

[0014] Another technical solution of the present invention is a heat storage method for a thermal power plant solid waste roasting heat storage ceramsite production device, comprising the following steps: According to the amount of solid waste generated by thermal power plants each year, the production capacity of the production equipment is planned and designed to timely digest and dispose of the solid waste generated by thermal power plants each year, or the solid waste stored in the ash yard of thermal power plants; Conduct chemical analysis on the composition of the solid waste from the thermal power plant, add a set proportion of sludge or clay and other combustible particles, configure the best ceramsite raw material components, and send them to the raw material mixer for full mixing and stirring; Adjust the performance parameters of the granulator according to the demand for ceramsite products, produce ceramsite raw materials with set diameter and send them into the rotary kiln for high-temperature roasting; Use the peak and frequency regulation of thermal power units to ensure the internal temperature of the rotary kiln or heat storage chamber to meet the requirements of ceramsite production process or insulation level; According to the heat storage capacity of the heat storage and preservation room, feed water or heat network return water is sent to absorb the stored heat to generate heat network water or industrial steam for external heating, and the peak and frequency regulation of the power grid is achieved through the heat storage process.

[0015] Preferably, the peak load and frequency regulation of the power grid is implemented as follows: According to the peak and frequency regulation load demand of the power grid or thermal power units for the solid waste roasting thermal storage ceramsite production device of the thermal power plant, the power consumption of the solid waste roasting thermal storage ceramsite production device of the thermal power plant is adjusted; When the thermal power plant solid waste roasting heat storage ceramsite production device is operating in the heat storage mode, the electric heating unit uses the surplus power of the thermal power unit for peak load and frequency regulation to supply power, and increases or decreases the power consumption of the thermal power plant solid waste roasting heat storage ceramsite production device by increasing or decreasing the number of switched electric heating components, responding to the peak load and frequency regulation needs of the power grid or thermal power unit; When the thermal power plant solid waste roasting heat storage ceramsite production device is operating in a heat release condition, the electric heating unit stops supplying power, and utilizes the heat stored in the heat storage and insulation chamber and the hot air circulation to heat the feed water or the hot network water to generate hot water or steam for heating demand, responding to the power grid or thermal power unit's demand to reduce the power consumption of the thermal power plant solid waste roasting heat storage ceramsite production device; When the power grid or thermal power unit uses the thermal power plant's solid waste roasting heat storage ceramsite production device to respond to the power grid's frequency regulation auxiliary service needs, the power supply of several electric heating unit heating components is quickly put into or cut off to achieve a rapid increase or decrease in the power consumption of the thermal power plant's solid waste roasting heat storage ceramsite production device, thereby responding to the power grid's frequency regulation auxiliary service needs.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: A device for producing heat-storage ceramsite by roasting solid waste in a thermal power plant utilizes a specially designed rotary kiln and a heat storage and insulation chamber and high-temperature ceramsite to realize efficient storage of electric energy into thermal energy. It has high heat storage efficiency, occupies a small area, and is safer than conventional molten salt heat storage. The electric heating power is changed by switching the number of heating components of a number of electric heating units, thereby realizing a response to the peak-shaving and frequency-modulation signals of the power grid, so that the device can participate in the regulation of power auxiliary services and obtain auxiliary service benefits.

[0017] Furthermore, rotary kilns using gas, coal or electric heating can achieve many benefits such as efficient heat transfer, precise temperature control, energy conservation and emission reduction, and improved production efficiency, which helps to improve product quality, reduce operating costs, and meet the environmental protection and safety requirements of modern industry.

[0018] Furthermore, electric heating units are installed in the rotary kiln and the heat storage chamber, and electromagnetic heating or resistive heating is used. This can not only improve the heating efficiency and accurately control the temperature, but also effectively reduce the operating costs, reduce the impact on the environment, and ensure the safety and stability of the production process.

[0019] Furthermore, by storing heat and keeping warm the high-temperature ceramsite products produced during the production process of the rotary kiln in the insulation chamber, energy waste can be effectively reduced. When not in use, the ceramsite and insulation layer can maintain high temperatures and supply the heat required by the external heat network or the air-water heat exchanger, thereby improving the overall energy utilization rate.

[0020] Furthermore, installing an air-water heat exchanger in the kiln tail smoke chamber can not only effectively recycle and utilize the waste heat of high-temperature flue gas, improve energy utilization and thermal effect, and reduce environmental pollution, but also significantly reduce operating costs, enhance system stability and heat network economy, optimize energy management, and promote the sustainable development of industrial production.

[0021] The heat storage method of the solid waste roasting heat storage ceramsite production device in the thermal power plant, after the solid waste is converted into ceramsite products, not only the environmental pollution hazards of stacking are eliminated, but also the emission of harmful substances is reduced. The waste is reused in the ceramsite production process, reducing resource waste. Making full use of the peak-shaving and frequency-modulating power of the thermal power plant units can improve the efficiency of energy use in the power plant and reduce energy waste. Using the existing power plant facilities to provide heat sources can reduce the external energy consumption in the ceramsite production process and reduce production costs; through the regulation of the heat storage device, it can help the power grid to smoothly transition load fluctuations, effectively alleviate the instability of the power grid, and improve the reliability and stability of the power grid. The peak-shaving and frequency modulation of the power grid can not only reduce the operating cost of the power system, but also ensure the stability of the power supply and provide users with better power services. The implementation of the heat storage method of the present invention, in addition to effectively solving the problems of solid waste treatment, energy utilization, environmental protection, etc., can also improve the production efficiency of thermal power plants, promote green development, and play a positive role in promoting the peak-shaving and frequency modulation of the power grid. By integrating the advantages of solid waste treatment and energy utilization, not only the cost is reduced, but also the recycling of resources is promoted.

[0022] In summary, the present invention can realize the recycling of resources and reduce the negative impact of waste on the environment. At the same time, through efficient production and energy efficiency improvement, it makes positive contributions to energy conservation and emission reduction, cost reduction and environmental protection.

[0023] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings to be used in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a connection diagram of the device of the present invention.

[0026] Among them: 1. Raw material mixer; 2. Belt conveyor; 3. Aging warehouse; 4. Hopper; 5. Granulator; 6. Shaper; 7. Kiln tail smoke chamber; 8. Power station boiler dust collector; 9. Rotary kiln; 10. Electric heating unit; 11. Heat storage and insulation room; 12. Air-water heat exchanger. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0031] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0034] The invention provides a thermal power plant solid waste roasting heat storage ceramsite production device and a heat storage method thereof, wherein the solid waste of the thermal power plant is mixed with sludge or clay, and the mixture is evenly mixed by a mixing mixer, and then the mixed raw materials are sent to an aging warehouse for aging treatment by a belt conveyor; the aged raw materials are sent to a granulator through a hopper to produce ceramsite raw materials of a certain specification and shape, and then are shaped and screened by a shaping machine; the shaped ceramsite raw materials are sent to a rotary kiln furnace and hardened and formed by high-temperature roasting; the smoke generated during the roasting process is collected by a kiln tail smoke chamber, and finally sent to a dust collector of a power station boiler for treatment; the formed hot ceramsite products are sent to a heat storage and insulation chamber to complete heat storage and energy storage, integrating solid waste treatment, ceramsite production and thermal energy storage, and realizing resource utilization and energy storage of waste.

[0035] See also Figure 1The present invention discloses a thermal power plant solid waste roasting heat storage ceramsite production device, comprising a raw material mixing and stirring machine 1, a belt conveyor 2, an aging warehouse 3, a hopper 4, a granulator 5, a shaping machine 6, a kiln tail smoke chamber 7, a power station boiler dust collector 8, a rotary kiln 9, an electric heating unit 10, a heat storage and insulation chamber 11 and an air-water heat exchanger 12. The raw material mixing and stirring machine 1 mixes the solid waste in the thermal power plant with sludge or clay evenly, and sends the ceramsite production raw materials to the aging warehouse 3 for aging through the belt conveyor 2. The aged raw materials are collected through a hopper 4 and sent to a granulator 5 to produce ceramsite raw materials of a certain specification and shape. The raw materials are then shaped and screened by a shaping machine 6 and sent to a rotary kiln 9. The rotary kiln 9 bakes and hardens the ceramsite raw materials through high-temperature baking. The flue gas generated by the baking process is collected by a kiln tail smoke chamber 7 at one end of the rotary kiln 9 and then sent to a dust collector 8 of a power station boiler. The final hot ceramsite product is finally sent to a heat storage and insulation chamber 11 to realize heat storage and energy storage.

[0036] The rotary kiln 9 uses gas, coal or electric heating to achieve a high temperature roasting kiln environment.

[0037] The electric heating unit 10 is an electromagnetic heating or resistive heating unit, and is powered by the surplus power of the thermal power unit for peak and frequency regulation.

[0038] An air-water heat exchanger 12 is arranged outside the kiln tail smoke chamber 7 or the heat storage and insulation chamber 11, and the high-temperature air or high-temperature flue gas in the kiln tail smoke chamber 7 or the heat storage and insulation chamber 11 is extracted to exchange heat with water, and the stored heat is used to produce hot water or industrial steam for external supply; through the air-water heat exchanger 12, the waste heat of the high-temperature flue gas discharged by the rotary kiln is used to heat the feed water or the return water of the heat network.

[0039] The heat storage and insulation chamber 11 includes an insulation shell and an electric heating unit arranged inside it. The high-temperature expanded clay products produced by the rotary kiln 9 are stored and insulated in the heat storage and insulation chamber 11. The feed water or heat network return water is sent to the air-water heat exchanger 12 to be heated by the expanded clay and high-temperature air to generate industrial steam or hot water for external supply.

[0040] The raw materials used in the production of expanded clay are fly ash, boiler slag or desulfurized gypsum produced by the boilers of thermal power units and other available solid wastes from thermal power plants.

[0041] In order to ensure the porosity and lightweight requirements of expanded clay products, a certain proportion of dried sludge, biomass powder, coal powder or other combustible particles are added to the expanded clay raw materials to ensure that the porosity or lightweight quality of the product after calcining the expanded clay meets the requirements.

[0042] The present invention discloses a heat storage method for a thermal power plant solid waste roasting heat storage ceramsite production device, which utilizes the high-temperature ceramsite heat storage generated by the thermal power plant solid waste roasting heat storage ceramsite production device to achieve heat storage and energy storage, and the specific steps are as follows: According to the amount of solid waste such as fly ash, slag or desulfurized gypsum generated by thermal power plants each year, the production capacity of production equipment is planned, designed and discussed to timely digest and dispose of the solid waste generated by thermal power plants each year, or the solid waste stored in the ash yard of thermal power plants; Conducting component analysis on the solid waste from the thermal power plant, adding a certain proportion of sludge or clay and other combustible particulate matter, configuring the best ceramsite raw material components, and sending these components to the raw material mixer 1 for sufficient mixing and stirring; According to the future demand for ceramsite products, the performance parameters of the granulator are adjusted to produce ceramsite raw materials of a certain diameter and send them into the rotary kiln 9 for high-temperature roasting; The peak-shaving and frequency-modulating power of the thermal power unit is used to supply the electric heating unit 10, so as to ensure that the internal temperature of the rotary kiln 9 or the heat storage and insulation chamber 11 meets the requirements of the ceramsite production process or the insulation level; According to the heat storage capacity of the heat storage and insulation chamber 11, a certain amount of feed water or heat network return water is sent in to absorb the stored heat, thereby generating heat network water or industrial steam for external heating.

[0043] The steps for power grid peak load regulation and frequency regulation are as follows: S1. According to the peak and frequency regulation load requirements of the power grid or thermal power units for the solid waste roasting heat storage ceramsite production device of the thermal power plant, the overall power consumption of the solid waste roasting heat storage ceramsite production device of the thermal power plant is adjusted; S2. When the thermal power plant solid waste roasting heat storage ceramsite production device is operated in the heat storage mode, the electric heating unit 10 uses the surplus power of the thermal power unit for peak and frequency regulation to supply power, and increases or decreases the power consumption of the overall device by increasing or decreasing the number of switched electric heating components, thereby responding to the peak and frequency regulation needs of the power grid or the thermal power unit; S3, when the thermal power plant solid waste roasting heat storage ceramsite production device is operating in a heat release condition, the electric heating unit stops its power supply, and utilizes the heat storage and hot air circulation in the heat storage and insulation chamber 11 to heat the feed water or hot network water to generate hot water or steam for heating demand, thereby responding to the power grid or thermal power unit's desire to reduce the power consumption of the thermal power plant solid waste roasting heat storage ceramsite production device; S4. When the power grid or thermal power unit hopes to use the thermal power plant's solid waste roasting heat storage ceramsite production device to respond to the power grid's frequency regulation auxiliary service needs, it can use the rapid input or cut-off of the power supply of the heating components of several electric heating units to achieve a rapid increase or decrease in the power consumption of the thermal power plant's solid waste roasting heat storage ceramsite production device to respond to the power grid's frequency regulation auxiliary service needs.

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] Application Examples Application in building materials Ceramic aggregate is a common lightweight building material. Ceramic aggregate produced by roasting solid waste from thermal power plants can be used to make lightweight concrete, which is often used in building structures such as walls and floors. It has good thermal insulation properties and can improve the energy efficiency of buildings.

[0046] Application scenarios: Building energy saving: By adding the produced ceramsite to concrete, the thermal insulation effect of the building can be greatly improved and energy consumption can be reduced.

[0047] Green building materials: Using waste to produce expanded clay is in line with the concept of sustainable development, can reduce resource waste, and improve the green certification of buildings (such as LEED certification).

[0048] Application in energy storage devices Ceramic granules have good heat storage performance. They can store heat at high temperatures and release it slowly, making them suitable for energy storage systems. By coating the surface of ceramsite with thermal conductive materials, the thermal conductivity of ceramsite can be enhanced, making it more suitable for efficient energy storage.

[0049] Application scenarios: Thermal energy storage system: Ceramic granules produced by roasting solid waste in thermal power plants can be used as thermal energy storage media in solar thermal power generation systems or industrial waste heat recovery systems. In the system, ceramsite absorbs excess heat and releases heat energy when needed for power generation or industrial heating.

[0050] In order to better understand this process, simulation can be used to analyze the performance of equipment and products under different process conditions. The following are some possible simulation data: Temperature distribution and heat transfer simulation Simulation goal: Analyze the roasting process of ceramsite raw materials in a rotary kiln, especially the temperature distribution and heat conduction.

[0051] Simulation results: In the kiln, the maximum temperature of the ceramsite raw material can reach 1200°C, and the roasting time is 3 to 4 hours.

[0052] Due to the combined effects of heat convection and radiation in the rotary kiln, the temperature distribution of the ceramsite raw material is relatively uniform, and the temperature difference between the surface and the inside of the ceramsite is within ±20°C, ensuring the uniform roasting of the ceramsite.

[0053] Flue gas treatment and dust removal efficiency simulation Simulation goal: To evaluate the flue gas treatment effect of the kiln tail smoke chamber and the power station boiler dust collector.

[0054] Simulation results: The flue gas temperature collected by the kiln tail smoke chamber is 500°C. After being filtered by the dust collector, the particle concentration in the flue gas drops to below 20mg / m³, which meets the environmental emission standards.

[0055] The concentrations of carbon dioxide (CO2) and nitrogen oxides (NOx) in the flue gas are kept within a reasonable range, ensuring the efficient operation of the exhaust gas treatment facilities.

[0056] Thermal storage room performance simulation Simulation goal: To simulate the heat storage and release process of expanded clay in the thermal storage chamber, and to analyze its heat storage capacity and thermal insulation effect.

[0057] Simulation results: The temperature of the expanded clay in the heat storage and insulation chamber rises at a rate of 10°C per hour during the heating stage, and the heat storage efficiency reaches more than 95%.

[0058] When the external ambient temperature drops, expanded clay can slowly release the stored heat within 12 hours and maintain a stable heat output, making it suitable for industrial and civil heat storage systems.

[0059] Production efficiency and energy consumption simulation Simulation goal: Analyze the energy consumption and production efficiency of the entire production line.

[0060] Simulation results: 1,500 kilograms of expanded clay can be produced per hour, and the overall energy efficiency of the production line reaches 80%, which saves 15% energy compared to traditional expanded clay production lines.

[0061] The energy consumption data of the electric heating unit and the rotary kiln show that the key to improving the overall energy efficiency lies in optimizing the utilization of heat sources and the heat cycle in the rotary kiln.

[0062] The technology of producing ceramsite by roasting solid waste from thermal power plants not only effectively utilizes the solid waste resources of thermal power plants, but also produces ceramsite with energy storage capacity, which is widely used in the fields of construction and energy. Through simulation analysis, the energy efficiency, production efficiency and environmental impact of each link can be optimized, further improving the economy and environmental protection of this technology.

[0063] In summary, the present invention provides a thermal power plant solid waste roasting heat storage ceramsite production device and a heat storage method thereof, which have the following characteristics: Solid waste from thermal power plants (such as fly ash, slag, etc.) is mixed with sludge or clay and converted into valuable building materials (ceramsite) through ceramsite production technology. This process can effectively reduce the stacking and treatment of waste, improve the utilization rate of waste, and reduce environmental pollution.

[0064] Due to the mixed utilization of solid waste and clay, the dependence on raw materials such as natural clay is reduced, and natural resources are protected.

[0065] By introducing the flue gas from the roasting process into the kiln tail smoke chamber and then directing it into the power station boiler dust collector for purification, the pollution of the flue gas to the atmosphere is reduced, which meets the environmental protection requirements. At the same time, these waste gas treatment systems can effectively remove harmful substances and reduce pollution to the surrounding environment.

[0066] Through the high temperature roasting and electric heating unit of the rotary kiln, the production of expanded clay is not only energy-saving, but also realizes the high temperature treatment of waste and reduces energy consumption. At the same time, the expanded clay itself has excellent thermal insulation properties, which helps to further enhance the energy-saving effect.

[0067] The design of the device includes multiple links such as raw material mixing, transportation, aging, granulation, shaping, roasting, etc. The process is compact and highly automated, which can improve production efficiency and reduce labor costs. At the same time, automated operation also helps to stabilize product quality and ensure the consistency and stability of ceramsite.

[0068] Through the screening of the shaping machine and the high-temperature roasting in the rotary kiln, the produced ceramsite has good physical properties, such as high strength and moderate density, and is suitable for use in many fields such as construction, gardening, adsorption, etc.

[0069] By storing the fired ceramsite in the heat storage chamber, the device achieves effective storage of thermal energy. As an excellent thermal storage material, ceramsite can store thermal energy in a hot state and release it when needed, reducing the waste of thermal energy and improving the energy efficiency of the overall system.

[0070] The heat storage chamber can effectively regulate energy fluctuations in the production process, balance the supply and demand of thermal energy, and improve the stability of the energy system.

[0071] The production process of ceramsite can effectively treat solid waste from thermal power plants, avoiding the negative impact of direct waste stacking or discharge on the environment. In addition, the flue gas purification device effectively controls the harmful gases generated during the roasting process, further reducing pollution to the environment.

[0072] By rationally utilizing waste from thermal power plants, the storage of waste and land requirements are reduced, contributing to environmental protection and conservation of land resources.

[0073] By combining solid waste with other raw materials to produce ceramsite, not only the procurement cost of raw materials is reduced, but also the cost of waste disposal is reduced. As a product with a large demand in the building material market, ceramsite can bring considerable economic benefits.

[0074] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A thermal power plant solid waste roasting heat storage ceramsite production device, characterized in that: The invention comprises a raw material mixing and stirring machine (1), which is connected to an aging warehouse (3) via a belt conveyor (2). The raw material mixing and stirring machine (1) is used to uniformly mix solid waste in a thermal power plant with sludge or clay to obtain raw materials for ceramsite production. The raw materials for ceramsite production are sent to the aging warehouse (3) via the belt conveyor (2) for aging treatment. The outlet end of the aging warehouse (3) is connected to a rotary kiln (9) via a hopper (4), a granulator (5) and a shaping machine (6) in sequence. The output end of the rotary kiln (9) is connected to a heat storage and insulation chamber (11) for storing heat and energy of the formed hot ceramsite products.

2. The device for producing thermal power plant solid waste roasting heat storage ceramsite according to claim 1, characterized in that: The rotary kiln (9) uses gas, coal or electric heating to achieve a high temperature roasting kiln environment.

3. The device for producing thermal power plant solid waste roasting heat storage ceramsite according to claim 2, characterized in that: The rotary kiln (9) and the heat storage and insulation chamber (11) are both provided with an electric heating unit (10).

4. The device for producing thermal power plant solid waste roasting heat storage ceramsite according to claim 3, characterized in that: The electric heating unit (10) adopts electromagnetic heating or resistive heating.

5. The device for producing thermal power plant solid waste roasting heat storage ceramsite according to claim 1, characterized in that: The heat storage and insulation chamber (11) comprises a heat insulation shell and an electric heating unit arranged inside the heat storage and insulation chamber (11). An air-water heat exchanger (12) is arranged outside the heat storage and insulation chamber (11). The high-temperature ceramsite product produced by the rotary kiln (9) is heat-stored and insulated in the heat storage and insulation chamber (11). Feed water or return water from the heat network is sent to the air-water heat exchanger (12) to be heated by the ceramsite and high-temperature air to generate industrial steam or hot water for external supply.

6. The device for producing thermal power plant solid waste roasting heat storage ceramsite according to claim 1, characterized in that: An air-water heat exchanger (12) is provided in the kiln tail smoke chamber (7) for utilizing the waste heat of high-temperature smoke discharged from the rotary kiln to heat feed water or heat network return water.

7. The device for producing thermal power plant solid waste roasting heat storage ceramsite according to claim 1, characterized in that: The raw materials for ceramsite production are fly ash, boiler slag or desulfurized gypsum produced by the boilers of thermal power units and other available solid wastes from thermal power plants.

8. The device for producing thermal power plant solid waste roasting heat storage ceramsite according to claim 1, characterized in that: A kiln tail smoke chamber (7) is provided at one end of the rotary kiln furnace (9), and the kiln tail smoke chamber (7) is connected to a dust collector (8) of a power station boiler.

9. The heat storage method of the thermal power plant solid waste roasting heat storage ceramsite production device according to claim 1, characterized in that: The following steps are involved: According to the amount of solid waste generated by thermal power plants each year, the production capacity of the production equipment is planned and designed to timely digest and dispose of the solid waste generated by thermal power plants each year, or the solid waste stored in the ash yard of thermal power plants; Conduct chemical analysis on the composition of the solid waste from the thermal power plant, add a set proportion of sludge or clay and other combustible particles, configure the best ceramsite raw material components, and send them to the raw material mixer for full mixing and stirring; Adjust the performance parameters of the granulator according to the demand for ceramsite products, produce ceramsite raw materials with set diameter and send them into the rotary kiln for high-temperature roasting; Use the peak and frequency regulation of thermal power units to ensure the internal temperature of the rotary kiln or heat storage chamber to meet the requirements of ceramsite production process or insulation level; According to the heat storage capacity of the heat storage and preservation room, feed water or heat network return water is sent to absorb the stored heat to generate heat network water or industrial steam for external heating, and the peak and frequency regulation of the power grid is achieved through the heat storage process.

10. The heat storage method of the thermal power plant solid waste roasting heat storage ceramsite production device according to claim 9, characterized in that: The specific implementation of power grid peak load regulation and frequency regulation is as follows: According to the peak and frequency regulation load demand of the power grid or thermal power units for the solid waste roasting thermal storage ceramsite production device of the thermal power plant, the power consumption of the solid waste roasting thermal storage ceramsite production device of the thermal power plant is adjusted; When the thermal power plant solid waste roasting heat storage ceramsite production device is operating in the heat storage mode, the electric heating unit uses the surplus power of the thermal power unit for peak load and frequency regulation to supply power, and increases or decreases the power consumption of the thermal power plant solid waste roasting heat storage ceramsite production device by increasing or decreasing the number of switched electric heating components, responding to the peak load and frequency regulation needs of the power grid or thermal power unit; When the thermal power plant solid waste roasting heat storage ceramsite production device is operating in a heat release condition, the electric heating unit stops supplying power, and utilizes the heat stored in the heat storage and insulation chamber and the hot air circulation to heat the feed water or the hot network water to generate hot water or steam for heating demand, responding to the power grid or thermal power unit's demand to reduce the power consumption of the thermal power plant solid waste roasting heat storage ceramsite production device; When the power grid or thermal power unit uses the thermal power plant's solid waste roasting heat storage ceramsite production device to respond to the power grid's frequency regulation auxiliary service needs, the power supply of several electric heating unit heating components is quickly put into or cut off to achieve a rapid increase or decrease in the power consumption of the thermal power plant's solid waste roasting heat storage ceramsite production device, thereby responding to the power grid's frequency regulation auxiliary service needs.

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