Waste-free urban green energy valley mode multi-element solid hazardous waste energy resource collaborative gradient utilization system

Abstract

The invention belongs to the technical field of solid hazardous waste treatment, and particularly relates to a waste-free urban green energy valley mode multi-element solid hazardous waste energy resource collaborative gradient utilization system. Comprising a solid hazardous waste pre-burning pretreatment energy generation and conversion system, a cyclone dust collection system, an energy gradient utilization and product coupling modification system and a waste gas centralized collection and disposal system which are sequentially connected in series. Organic high-calorific-value solid hazardous waste is converted into high-temperature energy flue gas as a core center, the high-temperature energy flue gas is used for regeneration or utilization of multi-element solid hazardous waste in a gradient mode, self-circulation type operation can be achieved through collaborative sharing of multiple pieces of production line equipment without fossil energy supply, and the production efficiency is improved. Therefore, a complete closed-loop ecological system for gradient use of solid hazardous waste resources is formed, the utilization value of the solid hazardous waste is maximized, the solid hazardous waste is truly turned into wealth, the purpose of treating waste with waste is achieved, and the method plays an important role in waste-free city construction.

Description

Technical Field

[0001] The present invention belongs to the technical field of solid and hazardous waste treatment, and specifically relates to a multi-solid and hazardous waste energy resource collaborative cascade utilization system in a waste-free city green energy valley model. Background Art

[0002] At present, my country's solid waste disposal and utilization has undergone two generations of technological innovation. Among them, the first generation of technology is the incineration + landfill method, which faces the problems of large investment, high operating costs, and the rapid decline in hazardous waste disposal prices, which has made it unprofitable. The second generation of technology is the coordinated disposal and utilization of solid hazardous waste by cement kilns. Although it is the best technology for the disposal of hazardous waste, with the development of technology, it has also experienced external hot plate furnaces, step furnaces, and even some external pre-combustion and pre-burning facilities such as gasification furnaces. A large number of innovative technologies have also solved some problems in the actual operation of the project. However, this disposal method has a large number of harmful elements brought into the cement kiln, which will have an impact on the quality fluctuation of clinker, and there are still certain limitations in the scale of disposal and energy utilization efficiency.

[0003] At the same time, according to the "Guidelines for the Review of Business Licenses for Co-treatment of Hazardous Wastes in Cement Kilns (Trial)", pretreatment refers to the process of drying, crushing, screening, neutralizing, stirring, mixing, matching, pre-burning and other preliminary treatments of hazardous wastes in order to meet the requirements of cement kiln co-treatment. Among them, pre-burning is the most efficient, safest and most thorough means to solve the pre-treatment of hazardous wastes in cement kiln co-treatment. However, there are currently two common problems in my country in terms of pre-burning as a preliminary pre-treatment process: one is the lack of core pre-burning equipment; the other is that there is a lack of outlet for the cascade use of high-temperature energy generated after pre-burning, resulting in energy waste, and there is still room for improvement in the efficiency of alternative fuel raw materials. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a coordinated cascade utilization system of multiple solid and hazardous waste energy resources in a waste-free city green energy valley model in response to the shortcomings of the prior art. The present invention realizes the energy conversion and cascade utilization of waste heat energy for the comprehensive utilization of multiple solid and hazardous wastes. It is a series of core equipment for the cascade use of renewable solid and hazardous waste products such as waste activated carbon, waste SCR catalysts, and waste metal packaging. It does not require fossil energy replenishment and can achieve self-circulating operation, thus forming a complete closed-loop ecosystem and maximizing the value of solid and hazardous waste utilization.

[0005] This scheme is realized through the following technical measures: a waste-free city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system, which includes a solid and hazardous waste pre-burning pre-treatment energy generation and conversion system, a cyclone dust collection system, an energy cascade utilization and product coupling modification system and a waste gas centralized collection and disposal system connected in series; The solid hazardous waste pre-burning and pre-treatment energy generation and conversion system pre-burns and pre-treats high calorific value solid hazardous waste materials to generate high-temperature flue gas as energy; The cyclone dust collection system collects and purifies the high-temperature flue gas generated by the solid and hazardous waste pre-burning and pre-treatment energy generation and conversion system, and converts all the high-temperature flue gas into high-temperature flue gas that can be directly used. The high-temperature flue gas can be supplied to the energy cascade utilization and product coupling modification system, and can also be directly connected to supply cement kiln decomposition furnaces, coal-fired power generation boilers, metallurgical furnaces, special furnaces for domestic waste incineration, special furnaces for hazardous waste incineration, and special furnaces for chemical industry; The energy cascade utilization and product coupling modification system includes one or more groups of parallel subsystems, each group of subsystems includes a fixed jacket desorption device or a rotary jacket desorption device, a secondary denitration device, a steam generating device and an induced draft device connected in series in sequence, the front end of the fixed jacket desorption device or the rotary jacket desorption device is connected in series with the outlet of the high-temperature flue gas, the high-temperature flue gas output by the fixed jacket desorption device or the rotary jacket desorption device enters the secondary denitration device for secondary denitration treatment, the flue gas after denitration enters the steam generating device, is cooled in the steam generating device, and generates saturated steam or superheated steam, the saturated steam or superheated steam is output through the induced draft device and can be used as secondary energy for the evaporation and crystallization process of water-washed fly ash, activated carbon re-pores, SCR catalyst resurrection, precious metal extraction heating and steam-cured building materials production, the flue gas after production is discharged into the waste gas centralized collection and disposal system, and the remaining saturated steam or superheated steam can generate electric energy through the waste heat power generation device; The waste gas centralized collection and disposal system can centrally treat the flue gas to ensure that it meets the emission standards.

[0006] Preferably, the solid hazardous waste pre-burning and pre-treatment energy generation and conversion system includes an offline pre-treatment gasification furnace and a grate furnace connected thereto. The solid hazardous waste materials are dried and partially pre-burned in the grate furnace and then enter the offline pre-treatment gasification furnace. The solid hazardous waste generates high-temperature flue gas during the gasification process in the offline pre-treatment gasification furnace.

[0007] Preferably, the cyclone dust collection system is connected to a feed port for ammonia-containing medium materials, and the high-temperature flue gas is denitrated in the cyclone dust collection system by active ammonia flue gas denitration to achieve primary denitration; The secondary denitrification device is SNCR or SCR denitrification.

[0008] Preferably, the rotary jacket desorption device includes an inclined high-temperature superconducting steel jacket and at least one outer insulation jacket, the outer insulation jacket is concentrically sleeved on the outside of the high-temperature superconducting steel jacket, and an external heating zone is formed between the outer wall of the high-temperature superconducting steel jacket and the inner wall of the outer insulation jacket. The high-temperature superconducting steel jacket is a solid waste material channel, and the external heating zone is a high-temperature flue gas channel. Along the conveying direction of the solid waste material, the high-temperature superconducting steel jacket and the outer insulation jacket are inclined from top to bottom, and the particulate matter mixed in the high-temperature flue gas falls to the bottom of the external heating zone by the action of its own gravity during the flow.

[0009] Preferably, the fixed jacket desorption device includes a horizontally arranged kiln body and a high-temperature superconducting steel jacket arranged in parallel throughout the length of the kiln body, a high-temperature flue gas channel is formed between the outer wall of the high-temperature superconducting steel jacket and the inner wall of the kiln body, and the inner cavity of the kiln body is divided into five working sections along its length, namely, a heating section, a low-temperature insulation section, a high-temperature heating section, a high-temperature insulation section, and a cooling section.

[0010] Preferably, when a fixed jacket desorption device is used in the subsystem, the multi-solid and hazardous waste energy resource coordinated cascade utilization system of the waste-free city green energy valley model can be used for the roasting and regeneration process of waste SCR catalysts, the roasting and recycling of waste metal packaging contaminants, and the sintering of solid waste-based building material components; When the fixed jacket desorption device is used for the calcination and regeneration process of the waste SCR catalyst, the waste SCR catalyst enters the fixed jacket desorption device after the soot blowing, ultrasonic cleaning, pickling, and reagent activation processes, and sequentially passes through the five sections of the fixed jacket desorption device, namely, the heating section, the low temperature insulation section, the high temperature heating section, the high temperature insulation section, and the cooling section, for the calcination process to generate high temperature flue gas. The high temperature flue gas is used to control the thermal environment temperature in the fixed jacket desorption device between 600 and 700 ° C, and finally leaves the fixed jacket desorption device at the outlet. The whole calcination process takes 7 hours. During the calcination process, the moisture in the solution is removed in the form of water vapor in the heating section. After drying, the waste S The CR catalyst is immersed in ammonium metavanadate and ammonium metatungstate. Both the ammonium metavanadate and ammonium metatungstate react with oxygen to generate the active components of the catalyst, V2O5 and WO3, which remain on the surface and micropores of the catalyst. The catalyst then enters the fixed jacket desorption device, where the active components V2O5 and WO3 are fixed in the SCR catalyst by high-temperature flue gas. A small amount of ammonia is generated during the conversion of ammonium metavanadate and ammonium metatungstate. The ammonia is introduced into the offline pretreatment gasifier under negative pressure for secondary combustion treatment. The flue gas after catalyst roasting is subjected to secondary denitration treatment in the secondary denitration device, and then enters the rear-end steam generation device, where the temperature is directly reduced to 200°C to generate saturated steam. The conversion reactions during the above process are as follows: 4NH4VO3+5O2→4V2O5+2H2O↑+4NH3↑ (NH4)6H2W 12 O 40 →12WO3+4H2O↑+6NH3↑; When the fixed jacket desorption device is used for the roasting and recycling of waste metal packaging contaminants, the high-temperature flue gas is used to control the thermal environment temperature in the fixed jacket desorption device between 800-900°C, and the temperature is kept for 120 minutes. The exhaust gas generated in the furnace is introduced into the offline pretreatment gasification furnace for secondary combustion treatment under the action of negative pressure; the flue gas after heat exchange of the roasting of waste metal packaging contaminants is subjected to secondary denitration in the secondary denitration device, and then enters the rear-end steam generation device, where the temperature is directly reduced to 200°C to generate saturated steam or superheated steam; When the fixed jacket desorption device is used for sintering of solid waste-based building material components, the temperature of the preheating section in the kiln body of the fixed jacket desorption device is 400-500°C, the temperature of the sintering section is 1100-1120°C, and the temperature of the cooling section is 300-400°C. The flue gas discharged from the fixed jacket desorption device is subjected to secondary denitrification by the secondary denitrification device, and then enters the rear-end steam generating device, where it is directly cooled to 200°C to generate saturated steam or superheated steam.

[0011] Preferably, when a rotary jacket desorption device is used in the subsystem, the waste-free city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system can be used for the thermal desorption and dioxin removal process of fly ash from domestic waste incineration, the activation and regeneration process of waste activated carbon, and the oxygen-free pyrolysis and roasting process of lithium battery recovery; When the rotary jacket desorption device is used for the thermal desorption and dioxin removal process of fly ash from the incineration of domestic waste, the directions of the fly ash material in the high-temperature superconducting steel jacket and the high-temperature flue gas in the external heating zone are opposite to each other, and stay for 20-40 minutes to complete the detoxification treatment. The waste gas generated by the thermal desorption of the fly ash in the high-temperature superconducting steel jacket is introduced into the offline pretreatment gasification furnace under negative pressure for secondary combustion treatment; the high-temperature flue gas after heat exchange with the fly ash material enters the secondary denitrification device for secondary denitrification treatment, and the flue gas after denitrification enters the steam generation device at the rear end, and is directly cooled to 200°C in the steam generation device to generate saturated steam or superheated steam; When the rotary jacket desorption device is used for the activation and regeneration process of waste activated carbon, the high-temperature flue gas is used to control the thermal environment temperature in the rotary jacket desorption device between 600-900°C. At this temperature, the organic matter adsorbed in the waste activated carbon is decomposed and ashed. At the same time, saturated steam is introduced into the rotary jacket desorption device for the multi-pore activation of the waste activated carbon. The waste activated carbon material in the warm superconducting steel jacket and the high-temperature flue gas in the external heating zone have opposite directions, and the residence time is 50-60 minutes. The waste gas generated by the activation and regeneration of the waste activated carbon in the warm superconducting steel jacket is introduced into the offline pretreatment gasification furnace under negative pressure for secondary combustion treatment. The high-temperature flue gas after heat exchange with the waste activated carbon enters the secondary denitration device for secondary denitration treatment. The flue gas after denitration enters the steam generation device at the rear end, and is directly cooled to 200°C in the steam generation device to generate saturated or superheated steam. When the rotary jacket desorption device is used for the oxygen-free pyrolysis and roasting process of lithium battery recovery, the thermal environment of the rotary jacket desorption device is controlled to an oxygen-free state above 450°C by using high-temperature flue gas, and the waste lithium batteries after discharge, disassembly and coarse crushing are transported to the rotary jacket desorption device and pyrolyzed for 30-60 minutes to complete the volatilization of the electrolyte and the dissolution of the battery membrane. The waste gas generated by the pyrolysis and roasting of the waste lithium batteries in the warm superconducting steel jacket is introduced into the intermittent defluorination device under the action of negative pressure, and the pyrolysis waste gas is removed from the hydrogen fluoride and then enters the offline pretreatment gasification furnace for secondary combustion treatment; the flue gas after heat exchange of the pyrolysis and roasting of the waste lithium batteries is subjected to secondary denitrification in the secondary denitrification device, and then enters the rear-end steam generation device, where it is directly cooled to 200°C to generate saturated steam or superheated steam.

[0012] Preferably, the centralized exhaust gas collection and disposal system includes one or more of the following treatment methods for the centralized treatment of flue gas: deacidification, activated carbon injection, Gore denitrification catalytic filter bag dust collection and denitrification, and electrostatic dust removal processes.

[0013] Preferably, the multi-component solid hazardous waste includes one or more of agricultural and forestry solid hazardous waste, industrial solid hazardous waste, urban solid hazardous waste, mineral solid hazardous waste, and marine solid hazardous waste, and the multi-component solid hazardous waste can be divided into organic and inorganic types after sorting.

[0014] Preferably, the solid hazardous waste pre-burning and pre-treatment energy generation and conversion system, the cyclone dust collection system, the energy cascade utilization and product coupling modification system and the waste gas centralized collection and disposal system are all communicatively connected to the digital platform control system and controlled and operated by the digital platform control system.

[0015] Beneficial effects of the present invention: The present invention uses high calorific value solid hazardous wastes as the core hub to convert them into high temperature energy flue gas, and uses the high temperature energy flue gas in a cascade manner for the regeneration or utilization of multiple solid hazardous wastes. Through the collaborative sharing of multiple production line equipment, it can achieve self-circulating operation without the need for fossil energy replenishment, thereby forming a complete closed-loop ecosystem for the cascade use of solid hazardous waste resources, maximizing the value of solid hazardous waste utilization, and truly turning solid hazardous waste into treasure, achieving waste treatment with waste, and playing an important role in the construction of a waste-free city. It can be seen that compared with the prior art, the present invention has outstanding substantive characteristics and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flowchart of a specific implementation mode of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of a rotary jacket desorption device.

[0018] Figure 3 This is a schematic diagram of the structure of a fixed jacket desorption device.

[0019] In the figure: 1-feeding device, 2-high-temperature flue gas introduction device, 3-external heating zone, 4-hot air outlet pipe, 5-external insulation sleeve, 6-high-temperature superconducting steel jacket, 7-sealing cover, 8-pyrolysis gas outlet, 9-kiln body, 10-high-temperature superconducting steel jacket. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods and in conjunction with the accompanying drawings.

[0021] A waste-free city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system, which includes a solid and hazardous waste pre-burning and pre-treatment energy generation and conversion system, a cyclone dust collection system, an energy cascade utilization and product coupling modification system and a waste gas centralized collection and disposal system connected in series.

[0022] Among them, the solid hazardous waste pre-burning pre-treatment energy generation and conversion system pre-burns and pre-treats high calorific value solid hazardous waste materials to generate high-temperature flue gas as energy. The solid hazardous waste pre-burning pre-treatment energy generation and conversion system includes an offline pre-treatment gasification furnace and a grate furnace connected thereto. The solid hazardous waste materials are dried and partially pre-burned in the grate furnace and then enter the offline pre-treatment gasification furnace. The solid hazardous waste materials generate high-temperature flue gas during the gasification process in the offline pre-treatment gasification furnace.

[0023] The cyclone dust collection system collects and purifies the high-temperature flue gas generated by the solid and hazardous waste pre-burning and pre-treatment energy generation and conversion system, and converts all the high-temperature flue gas into high-temperature flue gas that can be directly used. The temperature of the high-temperature flue gas is 800℃-1150℃. The high-temperature flue gas can be supplied to the energy cascade utilization and product coupling modification system, and can also be directly connected to supply cement kiln decomposition furnaces, coal-fired power generation boilers, metallurgical furnaces, special furnaces for domestic waste incineration, special furnaces for hazardous waste incineration, special furnaces for chemical industry and other energy use scenarios. The cyclone dust collection system is connected to the feed port of ammonia-containing medium materials, and the high-temperature flue gas is denitrated in the cyclone dust collection system by active ammonia flue gas denitration. Ammonia-containing medium materials (such as aluminum ash, ammonia water, urea, etc.) are added to the cyclone dust collection system through the feed port to perform primary denitration, so as to achieve functional complementarity with the secondary denitration device at the back end. The denitration method of the ammonia-containing medium material mainly includes SNCR denitration process and SCR denitration process. Among them, the SNCR denitrification process is to spray a reducing agent containing NHx (such as ammonia, ammonia water or urea, etc.) into the furnace temperature of 850℃-1150℃. The reducing agent is sprayed through a spray gun installed in the platen superheater area, and quickly decomposes into NH3 and other by-products. Then NH3 reacts with NOx in the flue gas by SNCR to generate N2 and H2O. The SCR denitrification process uses ammonia as a reducing agent. After being diluted by air to a safe concentration (volume concentration <5%) in the ammonia dilution system, it is injected into the original flue gas in the ammonia injection grid flue through the ammonia injection system. In the SCR reactor, the mixed gas undergoes an oxidation-reduction reaction with the injected reducing agent under the action of the catalyst to generate N2 and H2O that do not pollute the environment, thereby achieving the purpose of removing pollutants from the original flue gas.

[0024] The solid hazardous waste enters the solid hazardous waste pre-burning pretreatment energy generation and conversion system for pre-burning pretreatment. The pre-burning environment in the solid hazardous waste pre-burning pretreatment energy generation and conversion system combines various forms such as calcination, cracking, and gasification. After dust collection and purification treatment by the cyclone dust collection system, all are converted into high-temperature flue gas that can be directly used. The temperature of the high-temperature flue gas is 800-1150℃. At the same time, the cyclone dust collection system can also play the role of a secondary combustion chamber. The main functions of the secondary combustion chamber include the following aspects: 1. Prevent secondary pollution: The secondary combustion chamber incinerates the flue gas generated by the offline pretreatment gasifier at high temperature to ensure that the toxic and harmful substances in the flue gas are completely decomposed, thereby preventing secondary pollution and protecting the environment; 2. Improve combustion efficiency: The high temperature environment of the secondary combustion chamber (usually close to 1000 degrees Celsius) helps to completely burn the garbage, reduce the generation of incomplete combustion products such as carbon black and coal powder, and improve the incineration efficiency; 3. Ensure safe operation: The secondary combustion chamber is equipped with refractory materials, thermal insulation materials and heat-insulating materials to reduce heat loss and improve incineration efficiency; 3. An explosion-proof device and an emergency discharge chimney are installed on the top of the secondary combustion chamber to ensure that the pressure can be safely released in an emergency and to ensure the safe operation of the system; 4. Strong adaptability: The secondary combustion chamber has strong adaptability to changes in the incineration materials and can handle special garbage with high water content to ensure normal combustion; 5. High-efficiency heat transfer: The secondary combustion chamber ensures full contact between flue gas and particulate matter, prolongs the residence time of flue gas, improves reaction efficiency, and at the same time settles dust in the flue gas through gravity, thus achieving effective discharge of ash.

[0025] The energy cascade utilization and product coupling modification system includes one or more groups of parallel subsystems. The number of subsystems that need to be connected in parallel can be selected according to actual production capacity requirements. The higher the actual production capacity, the more subsystems that need to be connected in parallel. Each subsystem includes a fixed jacket desorption device or a rotary jacket desorption device, a secondary denitration device, a steam generating device and an induced draft device connected in series in sequence. The secondary denitration device is SNCR or SCR denitration. The front end of the fixed jacket desorption device or the rotary jacket desorption device is connected in series with the outlet of the high-temperature flue gas. The high-temperature flue gas output by the fixed jacket desorption device or the rotary jacket desorption device enters the secondary denitration device for secondary denitration treatment. The flue gas after denitration enters the steam generating device, is cooled in the steam generating device, and generates saturated steam or superheated steam. The saturated steam or superheated steam is output through the induced draft device and can be used as a secondary energy source for the evaporation and crystallization process of water-washed fly ash, activated carbon re-pores, SCR catalyst resurrection, precious metal extraction heating and steam-cured building materials production. The flue gas after production is discharged into the waste gas centralized collection and disposal system, and the remaining saturated steam or superheated steam can generate electric energy through a waste heat power generation device.

[0026] The rotary jacket desorption device includes a high-temperature superconducting steel jacket 6 and at least one outer insulation jacket 5 which are inclined and slanted. The outer insulation jacket 5 is concentrically sleeved on the outside of the high-temperature superconducting steel jacket 6. An outer heating zone 3 is formed between the outer wall of the high-temperature superconducting steel jacket 6 and the inner wall of the outer insulation jacket 5. The high-temperature superconducting steel jacket 6 is a solid waste material channel, and the outer heating zone 3 is a high-temperature flue gas channel. The solid waste material in the high-temperature superconducting steel jacket 6 and the high-temperature flue gas in the external heating zone 3 are non-contact, and along the conveying direction of the solid waste material, the high-temperature superconducting steel jacket 6 and the outer insulation jacket 5 are inclined from top to bottom. The particulate matter mixed in the high-temperature flue gas falls to the bottom of the external heating zone 3 by the action of its own gravity during the flow, and the external heating zone 3 provides space for dust collection and reduction. The desorbed waste gas generated by the heating of the solid waste material in the high-temperature superconducting steel jacket 6 enters the offline pretreatment gasifier for secondary combustion treatment through a pipeline under the action of negative pressure; when the desorbed waste gas generated by the heating of the material in the high-temperature superconducting steel jacket 6 contains hydrogen fluoride, this part of the waste gas is first defluorinated. Specifically, the defluorination is carried out in a manner that calcium hydroxide produced by the reaction of quicklime and water reacts with fluoride ions to generate insoluble calcium fluoride precipitates. The waste gas after defluorination enters the offline pretreatment gasifier for secondary combustion treatment through a pipeline under the action of negative pressure.

[0027] The fixed jacket desorption device includes a horizontally arranged kiln body and a high-temperature superconducting steel jacket 10 arranged in parallel throughout the kiln body 9, a high-temperature flue gas channel is formed between the outer wall of the high-temperature superconducting steel jacket 10 and the inner wall of the kiln body 9, and the inner cavity of the kiln body 9 is divided into five working sections along its length: a heating section, a low-temperature insulation section, a high-temperature heating section, a high-temperature insulation section, and a cooling section.

[0028] When a fixed jacket desorption device is used in the subsystem, the waste-free city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system can be used for the calcination and regeneration process of waste SCR catalysts, the calcination and recovery process of waste metal packaging contaminants, and the sintering of solid waste-based building material components.

[0029] When the fixed jacket desorption device is used for the calcination and regeneration process of the waste SCR catalyst, the waste SCR catalyst enters the fixed jacket desorption device after the soot blowing, ultrasonic cleaning, pickling, and reagent activation processes, and sequentially passes through the five sections of the fixed jacket desorption device, namely, the heating section, the low temperature insulation section, the high temperature heating section, the high temperature insulation section, and the cooling section, for the calcination process to generate high temperature flue gas. The high temperature flue gas is used to control the thermal environment temperature in the fixed jacket desorption device between 600 and 700 ° C, and finally leaves the fixed jacket desorption device at the outlet. The whole calcination process takes 7 hours. During the calcination process, the moisture in the solution is removed in the form of water vapor in the heating section. After drying, the waste S The CR catalyst is immersed in ammonium metavanadate and ammonium metatungstate. Both the ammonium metavanadate and ammonium metatungstate react with oxygen to generate the active components of the catalyst, V2O5 and WO3, which remain on the surface and micropores of the catalyst. The catalyst then enters the fixed jacket desorption device, where the active components V2O5 and WO3 are fixed in the SCR catalyst by high-temperature flue gas. A small amount of ammonia is generated during the conversion of ammonium metavanadate and ammonium metatungstate. The ammonia is introduced into the offline pretreatment gasifier under negative pressure for secondary combustion treatment. The flue gas after catalyst roasting is subjected to secondary denitration treatment in the secondary denitration device, and then enters the rear-end steam generation device, where the temperature is directly reduced to 200°C to generate saturated steam. The conversion reactions during the above process are as follows: 4NH4VO3+5O2→4V2O5+2H2O↑+4NH3↑ (NH4)6H2W 12 O 40 →12WO3+4H2O↑+6NH3↑.

[0030] When the fixed jacket desorption device is used for the roasting and recycling of waste metal packaging contaminants, the high-temperature flue gas is used to control the thermal environment temperature in the fixed jacket desorption device between 800-900°C, and the temperature is kept for 120 minutes. The exhaust gas generated in the furnace is introduced into the offline pretreatment gasification furnace for secondary combustion treatment under the action of negative pressure; the flue gas after heat exchange of the roasting of waste metal packaging contaminants is subjected to secondary denitration in the secondary denitration device, and then enters the rear-end steam generation device, where the temperature is directly reduced to 200°C to generate saturated steam or superheated steam; When the fixed jacket desorption device is used for sintering of solid waste-based building material components, the temperature of the preheating section in the kiln body of the fixed jacket desorption device is 400-500°C, the temperature of the sintering section is 1100-1120°C, and the temperature of the cooling section is 300-400°C. The flue gas discharged from the fixed jacket desorption device is subjected to secondary denitrification by the secondary denitrification device, and then enters the rear-end steam generating device, where it is directly cooled to 200°C to generate saturated steam or superheated steam.

[0031] When a rotary jacket desorption device is used in the subsystem, the waste-free city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system can be used for the thermal desorption and dioxin removal process of fly ash from domestic waste incineration, the activation and regeneration process of waste activated carbon, and the oxygen-free pyrolysis and roasting process of lithium battery recycling.

[0032] When the rotary jacket desorption device is used for the thermal desorption and dioxin removal process of fly ash from the incineration of domestic waste, the directions of the fly ash material in the high-temperature superconducting steel jacket and the high-temperature flue gas in the external heating zone are opposite to each other, and they stay for 20-40 minutes to complete the detoxification treatment. The waste gas generated by the thermal desorption of the fly ash in the high-temperature superconducting steel jacket is introduced into the offline pretreatment gasification furnace under negative pressure for secondary combustion treatment; the high-temperature flue gas after heat exchange with the fly ash material enters the secondary denitrification device for secondary denitrification treatment, and the flue gas after denitrification enters the steam generating device at the rear end, where it is directly cooled to 200°C to generate saturated steam or superheated steam.

[0033] When the rotary jacket desorption device is used for the activation and regeneration process of waste activated carbon, the high-temperature flue gas is used to control the thermal environment temperature in the rotary jacket desorption device between 600-900°C. At this temperature, the organic matter adsorbed in the waste activated carbon is decomposed and ashed. At the same time, saturated steam is introduced into the rotary jacket desorption device for multi-pore activation of the waste activated carbon. The directions of the waste activated carbon material in the warm superconducting steel jacket and the high-temperature flue gas in the external heating zone are opposite to each other, and the residence time is 50-60 minutes. The waste gas generated by the activation and regeneration of the waste activated carbon in the warm superconducting steel jacket is introduced into the offline pretreatment gasification furnace under negative pressure for secondary combustion treatment. The high-temperature flue gas after heat exchange with the waste activated carbon enters the secondary denitrification device for secondary denitrification treatment. The flue gas after denitrification enters the steam generating device at the rear end, and is directly cooled to 200°C in the steam generating device to generate saturated or superheated steam.

[0034] When the rotary jacket desorption device is used for the oxygen-free pyrolysis and roasting process of lithium battery recovery, the thermal environment of the rotary jacket desorption device is controlled to an oxygen-free state above 450°C by using high-temperature flue gas, and the waste lithium batteries after discharge, disassembly and coarse crushing are transported to the rotary jacket desorption device and pyrolyzed for 30-60 minutes to complete the volatilization of the electrolyte and the dissolution of the battery membrane. The waste gas generated by the pyrolysis and roasting of the waste lithium batteries in the warm superconducting steel jacket is introduced into the intermittent defluorination device under the action of negative pressure, and the pyrolysis waste gas is removed from the hydrogen fluoride and then enters the offline pretreatment gasification furnace for secondary combustion treatment; the flue gas after heat exchange of the pyrolysis and roasting of the waste lithium batteries is subjected to secondary denitrification in the secondary denitrification device, and then enters the rear-end steam generation device, where it is directly cooled to 200°C to generate saturated steam or superheated steam.

[0035] In the inner cavity of the tunnel-type high-temperature furnace, a preheating section, a sintering section and a cooling section are arranged in sequence from the material inlet to the product outlet. When a tunnel-type high-temperature furnace is used in the subsystem, the waste-free city green energy valley model multi-solid and hazardous waste energy resource collaborative cascade utilization system can be used for the sintering of solid waste-based building material components: the temperature of the preheating section in the tunnel-type high-temperature furnace is 400-500°C, the temperature of the sintering section is 1100-1120°C, and the temperature of the cooling section is 300-400°C. The flue gas discharged from the tunnel-type high-temperature furnace is subjected to secondary denitrification by a secondary denitrification device, and then enters the steam generating device at the rear end, where it is directly cooled to 200°C to generate saturated steam or superheated steam.

[0036] The centralized waste gas collection and disposal system treats the flue gas in a centralized manner so that the flue gas meets the emission standards. The centralized waste gas collection and disposal system treats the flue gas in a centralized manner by one or more of the following processes: deacidification, activated carbon injection, Gore denitration catalytic filter bag dust collection and denitration (which can achieve three-stage denitration of flue gas) and electrostatic dust removal. The treatment methods can be used selectively according to the flue gas composition and treatment requirements. According to the amount of flue gas to be discharged, one or more of the deacidification, activated carbon injection, Gore denitration catalytic filter bag dust collection and denitration and electrostatic dust removal process systems are turned on as needed to achieve the optimal operating load of the waste gas treatment facilities and ultimately achieve emission standards for flue gas.

[0037] The multi-component solid hazardous waste described in the present invention includes one or more of agricultural and forestry solid hazardous waste, industrial solid hazardous waste, urban solid hazardous waste, mineral solid hazardous waste, and marine solid hazardous waste. The multi-component solid hazardous waste can be divided into organic and inorganic types after sorting.

[0038] In the present invention, the Green Energy Valley model follows the development path of organic solid waste energy and inorganic solid waste resource utilization, takes the high-temperature energy generated by the solid hazardous waste pre-burning pretreatment energy generation and conversion system as the core, and takes the coupling between the solid waste resource utilization industry chain as the path. A series of core equipment and process technologies for energy conversion, cascade utilization of waste heat, and cascade use of products for the comprehensive utilization of multiple solid and hazardous wastes have been developed to form a closed-loop ecology for the cascade use of solid waste resources.

[0039] The Green Energy Valley model achieves system integration of resource recycling of multiple solid and hazardous wastes through horizontal collaboration between industries, equipment sharing between projects, and process coupling. It has the complete production line capacity for the recycling of the above-mentioned multiple solid and hazardous wastes, and is not limited to a single process. The Green Energy Valley model can achieve zero fossil energy and zero or even negative carbon emissions. Lithium batteries are first used for energy storage before disassembly, which can truly turn solid waste into treasure and achieve waste treatment, which plays an important role in the construction of a waste-free city.

[0040] In the present invention, high calorific value solid hazardous waste materials are pre-burned through a solid hazardous waste pre-burning pretreatment energy generation and conversion system to generate high-temperature flue gas as energy, which is used for solid waste product regeneration, resource utilization, and waste heat to produce steam to serve energy-consuming industries. The biomass energy (i.e., alternative fuel made from solid hazardous waste) is cascaded and renewable solid hazardous waste products such as waste activated carbon, waste SCR catalyst, and waste metal packaging are used through an energy cascade utilization and product coupling modification system to remove dioxins from fly ash from the incineration of domestic waste. At the same time, the shared utilization of the system is extended to waste activated carbon, waste SCR catalyst, waste metal packaging, waste lithium batteries, and precious metals such as gold, silver, copper, and nickel. The waste heat flue gas after the system can be used for the preparation of high-temperature steam (saturated steam and superheated steam) through a steam generator for the production of sintering and steam-curing building materials. The high-temperature steam can be used as a secondary energy source for the evaporation and crystallization of wastewater such as washed fly ash, activated carbon re-pores, SCR catalyst resurrection, precious metal extraction and steam-curing building materials. The pyrolysis gas generated in the high-temperature superconducting steel jacket is drained under negative pressure by a high-temperature fan to the solid and hazardous waste pre-burning and pre-treatment energy generation and conversion system for incineration. After the flue gas is directly cooled to 200°C by the steam generator, it is discharged after being treated in the centralized waste gas collection and disposal system and meets the standards. The remaining incineration residue participates in the coordinated disposal of the cement kiln.

[0041] In the present invention, the temperature of the high-temperature flue gas generated from the combustion in the off-line pretreatment gasifier and then passing through the cyclone dust collection system is 800-1150°C. After this part of the high-temperature flue gas energy is utilized through the energy cascade utilization and the product coupling modification system, the temperature attenuation will occur to varying degrees. The attenuated flue gas is passed through a steam generating device to generate saturated steam or superheated steam. The saturated steam or superheated steam is output through an induced draft device and can be used as a secondary energy source for the evaporation and crystallization process of washed fly ash, activated carbon re-pores, SCR catalyst resurrection, precious metal extraction heating and steam-cured building materials production. The flue gas after production is discharged into the centralized waste gas collection and disposal system, and the remaining or unusable saturated steam or superheated steam in the entire system enters the waste heat power generation device to generate electricity.

[0042] The solid hazardous waste pre-burning pre-treatment energy generation and conversion system, cyclone dust collection system, energy cascade utilization and product coupling modification system and waste gas centralized collection and disposal system are all connected to the digital platform control system for communication and operation control. The present invention is operated through a digital platform control system, which can realize the full life cycle supervision of solid hazardous waste after entering the factory from the raw material end, warehousing, out of the warehouse, disposal and utilization, etc., and can also have a DCS control system on the production line, and can also perform carbon sink calculations, display carbon emission reduction data in real time, and can also realize solid hazardous waste trading, carbon sink accounting, carbon footprint management and other functions on the basis of meeting daily production control.

[0043] In the present invention, the bottom ash produced by the solid hazardous waste after pre-burning by the solid hazardous waste pre-burning pretreatment energy generation and conversion system is treated in coordination with the cement kiln. The system can achieve independent operation throughout the year and is not affected by the shutdown of the cement kiln. The bottom ash is treated in coordination with the cement kiln and is not treated by other methods such as landfill. It is not subject to the requirements of industry standards and specifications on the incineration reduction rate, so that solid hazardous waste can be brought into the factory at any time for pre-burning and pre-treatment, which greatly reduces the danger of solid hazardous waste storage.

[0044] Technical features not described in the present invention can be implemented by existing technologies and will not be described in detail here. The present invention is not limited to the above specific embodiments, and changes, modifications, additions or substitutions made by ordinary technicians in the field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A multi-solid and hazardous waste energy resource collaborative cascade utilization system in a waste-free city green energy valley model, characterized by: It includes a solid and hazardous waste pre-burning and pre-treatment energy generation and conversion system, a cyclone dust collection system, an energy cascade utilization and product coupling modification system, and a waste gas centralized collection and disposal system that are connected in series; The solid hazardous waste pre-burning and pre-treatment energy generation and conversion system pre-burns and pre-treats high calorific value solid hazardous waste materials to generate high-temperature flue gas as energy; The cyclone dust collection system collects and purifies the high-temperature flue gas generated by the solid and hazardous waste pre-burning and pre-treatment energy generation and conversion system, and converts all the high-temperature flue gas into high-temperature flue gas that can be directly used. The high-temperature flue gas can be supplied to the energy cascade utilization and product coupling modification system, and can also be directly connected to supply cement kiln decomposition furnaces, coal-fired power generation boilers, metallurgical furnaces, special furnaces for domestic waste incineration, special furnaces for hazardous waste incineration, and special furnaces for chemical industry; The energy cascade utilization and product coupling modification system includes one or more groups of parallel subsystems, each group of subsystems includes a fixed jacket desorption device or a rotary jacket desorption device, a secondary denitration device, a steam generating device and an induced draft device connected in series in sequence, the front end of the fixed jacket desorption device or the rotary jacket desorption device is connected in series with the outlet of the high-temperature flue gas, the high-temperature flue gas output by the fixed jacket desorption device or the rotary jacket desorption device enters the secondary denitration device for secondary denitration treatment, the flue gas after denitration enters the steam generating device, is cooled in the steam generating device, and generates saturated steam or superheated steam, the saturated steam or superheated steam is output through the induced draft device and can be used as secondary energy for the evaporation and crystallization process of water-washed fly ash, activated carbon re-pores, SCR catalyst resurrection, precious metal extraction heating and steam-cured building materials production, the flue gas after production is discharged into the waste gas centralized collection and disposal system, and the remaining saturated steam or superheated steam can generate electric energy through the waste heat power generation device; The waste gas centralized collection and disposal system can centrally treat the flue gas to ensure that it meets the emission standards.

2. According to the zero-waste city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system of claim 1, it is characterized by: The solid hazardous waste pre-burning pretreatment energy generation and conversion system includes an offline pre-treatment gasification furnace and a grate furnace connected thereto. The solid hazardous waste materials are dried and partially pre-burned in the grate furnace before entering the offline pre-treatment gasification furnace. The solid hazardous waste materials generate high-temperature flue gas during the gasification process in the offline pre-treatment gasification furnace.

3. The multi-solid and hazardous waste energy resource collaborative cascade utilization system of the zero-waste city green energy valley model according to claim 2 is characterized by: The cyclone dust collection system is connected to an inlet for ammonia-containing medium materials, and the high-temperature flue gas is denitrated in the cyclone dust collection system by active ammonia flue gas denitration to achieve primary denitration; The secondary denitrification device is SNCR or SCR denitrification.

4. The multi-solid and hazardous waste energy resource collaborative cascade utilization system of the zero-waste city green energy valley model according to claim 3 is characterized by: The rotary jacket desorption device comprises an inclined high-temperature superconducting steel jacket and at least one outer insulation jacket, wherein the outer insulation jacket is concentrically sleeved on the outside of the high-temperature superconducting steel jacket, and an outer heating zone is formed between the outer wall of the high-temperature superconducting steel jacket and the inner wall of the outer insulation jacket, the inside of the high-temperature superconducting steel jacket is a solid waste material channel, and the inside of the outer heating zone is a high-temperature flue gas channel, and along the conveying direction of the solid waste material, the high-temperature superconducting steel jacket and the outer insulation jacket are inclined from top to bottom, and the particulate matter mixed in the high-temperature flue gas falls to the bottom of the external heating zone by the action of its own gravity during the flow.

5. The zero-waste city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system according to claim 4 is characterized by: The fixed jacket desorption device comprises a horizontally arranged kiln body and a high-temperature superconducting steel jacket arranged in parallel throughout the length of the kiln body, a high-temperature flue gas channel is formed between the outer wall of the high-temperature superconducting steel jacket and the inner wall of the kiln body, and the inner cavity of the kiln body is divided into five working sections along its length: a heating section, a low-temperature insulation section, a high-temperature heating section, a high-temperature insulation section, and a cooling section.

6. The zero-waste city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system according to claim 5 is characterized by: When a fixed jacket desorption device is used in the subsystem, the multi-solid and hazardous waste energy resource coordinated cascade utilization system of the waste-free city green energy valley model can be used for the roasting and regeneration process of waste SCR catalysts, the roasting and recycling of waste metal packaging contaminants, and the sintering of solid waste-based building material components; When the fixed jacket desorption device is used for the calcination and regeneration process of the waste SCR catalyst, the waste SCR catalyst enters the fixed jacket desorption device after the soot blowing, ultrasonic cleaning, pickling, and reagent activation processes, and sequentially passes through the five sections of the fixed jacket desorption device, namely, the heating section, the low temperature insulation section, the high temperature heating section, the high temperature insulation section, and the cooling section, for the calcination process to generate high temperature flue gas. The high temperature flue gas is used to control the thermal environment temperature in the fixed jacket desorption device between 600 and 700 ° C, and finally leaves the fixed jacket desorption device at the outlet. The whole calcination process takes 7 hours. During the calcination process, the moisture in the solution is removed in the form of water vapor in the heating section. After drying, the waste S The CR catalyst is immersed in ammonium metavanadate and ammonium metatungstate. Both the ammonium metavanadate and ammonium metatungstate react with oxygen to generate the active components of the catalyst, V2O5 and WO3, which remain on the surface and micropores of the catalyst. The catalyst then enters the fixed jacket desorption device, where the active components V2O5 and WO3 are fixed in the SCR catalyst by high-temperature flue gas. A small amount of ammonia is generated during the conversion of ammonium metavanadate and ammonium metatungstate. The ammonia is introduced into the offline pretreatment gasifier under negative pressure for secondary combustion treatment. The flue gas after catalyst roasting is subjected to secondary denitration treatment in the secondary denitration device, and then enters the rear-end steam generation device, where the temperature is directly reduced to 200°C to generate saturated steam. The conversion reactions during the above process are as follows: 4NH4VO3+5O2→4V2O5+2H2O↑+4NH3↑ (NH4)6H2W 12 The 40 →12WO3+4H2O↑+6NH3↑; When the fixed jacket desorption device is used for the roasting and recycling of waste metal packaging contaminants, the high-temperature flue gas is used to control the thermal environment temperature in the fixed jacket desorption device between 800-900°C, and the temperature is kept for 120 minutes. The exhaust gas generated in the furnace is introduced into the offline pretreatment gasification furnace for secondary combustion treatment under the action of negative pressure; the flue gas after heat exchange of the roasting of waste metal packaging contaminants is subjected to secondary denitration in the secondary denitration device, and then enters the rear-end steam generation device, where the temperature is directly reduced to 200°C to generate saturated steam or superheated steam; When the fixed jacket desorption device is used for sintering of solid waste-based building material components, the temperature of the preheating section in the kiln body of the fixed jacket desorption device is 400-500°C, the temperature of the sintering section is 1100-1120°C, and the temperature of the cooling section is 300-400°C. The flue gas discharged from the fixed jacket desorption device is subjected to secondary denitrification by the secondary denitrification device, and then enters the rear-end steam generating device, where it is directly cooled to 200°C to generate saturated steam or superheated steam.

7. The multi-solid and hazardous waste energy resource collaborative cascade utilization system of the zero-waste city green energy valley model according to claim 6 is characterized by: When a rotary jacket desorption device is used in the subsystem, the waste-free city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system can be used for the thermal desorption and dioxin removal process of domestic waste incineration fly ash, the activation and regeneration process of waste activated carbon, and the oxygen-free pyrolysis and roasting process of lithium battery recycling; When the rotary jacket desorption device is used for the thermal desorption and dioxin removal process of fly ash from the incineration of domestic waste, the directions of the fly ash material in the high-temperature superconducting steel jacket and the high-temperature flue gas in the external heating zone are opposite to each other, and stay for 20-40 minutes to complete the detoxification treatment. The waste gas generated by the thermal desorption of the fly ash in the high-temperature superconducting steel jacket is introduced into the offline pretreatment gasification furnace under negative pressure for secondary combustion treatment; the high-temperature flue gas after heat exchange with the fly ash material enters the secondary denitrification device for secondary denitrification treatment, and the flue gas after denitrification enters the steam generation device at the rear end, and is directly cooled to 200°C in the steam generation device to generate saturated steam or superheated steam; When the rotary jacket desorption device is used for the activation and regeneration process of waste activated carbon, the high-temperature flue gas is used to control the thermal environment temperature in the rotary jacket desorption device between 600-900°C. At this temperature, the organic matter adsorbed in the waste activated carbon is decomposed and ashed. At the same time, saturated steam is introduced into the rotary jacket desorption device for the multi-pore activation of the waste activated carbon. The waste activated carbon material in the warm superconducting steel jacket and the high-temperature flue gas in the external heating zone have opposite directions, and the residence time is 50-60 minutes. The waste gas generated by the activation and regeneration of the waste activated carbon in the warm superconducting steel jacket is introduced into the offline pretreatment gasification furnace under negative pressure for secondary combustion treatment. The high-temperature flue gas after heat exchange with the waste activated carbon enters the secondary denitration device for secondary denitration treatment. The flue gas after denitration enters the steam generation device at the rear end, and is directly cooled to 200°C in the steam generation device to generate saturated or superheated steam. When the rotary jacket desorption device is used for the oxygen-free pyrolysis and roasting process of lithium battery recovery, the thermal environment of the rotary jacket desorption device is controlled to an oxygen-free state above 450°C by using high-temperature flue gas, and the waste lithium batteries after discharge, disassembly and coarse crushing are transported to the rotary jacket desorption device and pyrolyzed for 30-60 minutes to complete the volatilization of the electrolyte and the dissolution of the battery membrane. The waste gas generated by the pyrolysis and roasting of the waste lithium batteries in the warm superconducting steel jacket is introduced into the intermittent defluorination device under the action of negative pressure, and the pyrolysis waste gas is removed from the hydrogen fluoride and then enters the offline pretreatment gasification furnace for secondary combustion treatment; the flue gas after heat exchange of the pyrolysis and roasting of the waste lithium batteries is subjected to secondary denitrification in the secondary denitrification device, and then enters the rear-end steam generation device, where it is directly cooled to 200°C to generate saturated steam or superheated steam.

8. The zero-waste city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system according to claim 7 is characterized by: The centralized waste gas collection and disposal system carries out centralized treatment of flue gas in the form of one or more of deacidification, activated carbon injection, Gore denitrification catalytic filter bag dust collection and denitrification, and electrostatic dust removal processes.

9. The zero-waste city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system according to claim 8 is characterized by: The multi-component solid hazardous waste includes one or more of agricultural and forestry solid hazardous waste, industrial solid hazardous waste, urban solid hazardous waste, mineral solid hazardous waste, and marine solid hazardous waste. The multi-component solid hazardous waste can be divided into organic and inorganic categories after sorting.

10. The zero-waste city green energy valley model multi-solid and hazardous waste energy resource coordinated cascade utilization system according to claim 9 is characterized in that: The solid hazardous waste pre-burning and pre-treatment energy generation and conversion system, cyclone dust collection system, energy cascade utilization and product coupling modification system and waste gas centralized collection and disposal system are all communicatively connected to the digital platform control system and controlled and operated by the digital platform control system.

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