阅读说明：本技术 一种基于太阳能光热的化学链连续制氧系统及方法 (Chemical chain continuous oxygen generation system and method based on solar photo-thermal ) 是由 于庆波 张存超 秦勤 于 2020-06-29 设计创作，主要内容包括：一种基于太阳能光热的化学链连续制氧系统,属于太阳能储热蓄热的化学链制氧技术领域,包括菲涅尔透镜场、储热装置、侧钢板、端部钢板、柱状玻璃体、升降闸门、预混器、风机、空气预热器、再热器、冷凝器、过热器、蒸发器、制氧装置。本申请通过使化学链制氧系统与太阳能光热蓄热系统相耦合,热空气吸收太阳能光热后先产生蒸汽和进行吸放氧反应,然后反应产生的高温贫氧空气对冷空气进行预热。释氧反应后得到的过热蒸汽和氧气混合气在对空气二次加热后进行冷凝处理得到纯氧,被预热的空气进入储热装置对流换热成高温空气继续参加上述循环。整个系统实现了能量梯级利用,达到低能耗制氧的目的,符合现代“节能减排”的主题。(The utility model provides a chemical chain system oxygen system in succession based on solar photothermal, belongs to the chemical chain system oxygen technical field of solar energy heat-retaining heat accumulation, including fresnel lens field, heat-retaining device, side steel sheet, tip steel sheet, the cylindrical vitreous body, lift gate, premixer, fan, air heater, re-heater, condenser, over heater, evaporimeter, oxygenerator. This application is through making chemical chain oxygen generation system and solar photothermal heat storage system looks coupling, and the hot-air absorbs the solar photothermal back and produces steam earlier and inhale the oxygen release reaction, and then the high temperature lean oxygen air that the reaction produced preheats the cold air. After the superheated steam and oxygen mixed gas obtained after the oxygen release reaction secondarily heats the air, condensation treatment is carried out to obtain pure oxygen, and the preheated air enters the heat storage device to be subjected to convection heat exchange to form high-temperature air to continuously participate in the circulation. The whole system realizes the cascade utilization of energy, achieves the aim of low-energy-consumption oxygen generation, and accords with the modern theme of energy conservation and emission reduction.)

1. A chemical-looping continuous oxygen generation system based on solar photo-thermal is characterized by comprising a Fresnel lens field, a heat storage device, a premixer, a fan, an air preheater, a reheater, a condenser, a superheater, an evaporator and an oxygen generation device, wherein the Fresnel lens field focuses sunlight on the heat storage device, an outlet of the heat storage device is respectively connected with a high-temperature air inlet of the premixer and an air inlet of the superheater, a normal-temperature air inlet of the premixer is connected with a first outlet of the fan, a second outlet of the fan is connected with an air inlet of the air preheater, an air outlet of the superheater is connected with an air inlet of the evaporator, a steam outlet of the evaporator is connected with a steam inlet of the superheater, a steam outlet of the superheater and an air outlet of the premixer are respectively connected with two inlets of the fan, two outlets of the oxygen generation device are respectively connected with an oxygen-poor air inlet of the air preheater and a heat source inlet of the reheater, the heat source outlet of the air preheater is connected with the atmosphere, the air inlet of the reheater is connected with the air outlet of the air preheater, the air outlet of the reheater is connected with the inlet of the heat storage device, and the heat source outlet of the reheater is connected with the inlet of the condenser.

2. The solar photothermal based chemical chain continuous oxygen generation system according to claim 1, wherein: the Fresnel lens field comprises a plurality of Fresnel lenses with line focusing, the Fresnel lenses are fixed on the Fresnel lenses through two matched frames on a Fresnel support, one side of each Fresnel lens is provided with equidistant insections, sunlight in a specified spectral range is reflected or refracted through the insections, and the sunlight is focused on the heat storage device through the Fresnel lens field.

3. The solar photothermal based chemical chain continuous oxygen generation system according to claim 1, wherein: the heat storage device comprises a columnar glass body, a lifting gate and a heat accumulator, wherein the columnar glass body is made of a plurality of side steel plates, two end steel plates and ultrahigh-temperature glass, the side steel plates, the end steel plates and the lifting gate form a heat storage device shell, a rotating shaft is arranged in the center of the end steel plate positioned below the heat storage device shell through a bearing, a bearing end plate is arranged on the lower surface of the end steel plate positioned below the heat storage device shell, a first gear is arranged on the rotating shaft in the heat storage device shell, the columnar glass body is arranged on the upper end face of the first gear, the first gear is meshed with a second gear, the second gear is arranged on a motor output shaft fixed on the outer surface of the side steel plates, the heat accumulator is filled in the columnar glass body, the heat accumulator is a heat storage; when sunlight exists, the lifting valve is opened, the sunlight penetrates through the columnar glass body made of the ultra-high temperature glass and is focused on the heat accumulator for heat accumulation, and when the sunlight does not exist, the lifting valve is closed to keep the heat of the heat accumulator; the heat energy is stored so as to ensure that the energy storage body in the heat storage device can still emit heat even under the conditions of no sunshine such as at night, cloudy days or cloudy days, and the like, and the system can continuously and stably run by heating working media.

4. The solar photothermal based chemical chain continuous oxygen generation system according to claim 1, wherein: the oxygen generation device comprises a plurality of oxygen release reactors, a plurality of oxygen absorption reactors, an upper valve and a lower valve, wherein two inlets of the upper valve are respectively connected with a steam outlet of a superheater and an air outlet of a premixer, an outlet of the upper valve is respectively connected with inlets of the oxygen release reactors and the oxygen absorption reactors, oxygen carriers are arranged in the oxygen absorption reactors and the oxygen release reactors, outlets of the oxygen absorption reactors and the oxygen release reactors are respectively connected with an inlet of the lower valve, and two outlets of the lower valve are respectively connected with an oxygen-poor air inlet of an air preheater and a heat source inlet of a reheater; the upper valve and the lower valve are used for switching a passage connected with the oxygen release reactor and the oxygen absorption reactor.

5. An oxygen generation method based on the solar photothermal based chemical chain continuous oxygen generation system of claim 1, characterized by comprising the steps of:

step 1: opening a lifting gate of the heat storage device, and focusing sunlight on a cylindrical glass body made of ultra-high temperature glass of the heat storage device through a Fresnel lens line by adjusting the height and the angle of the Fresnel lens to heat a heat accumulator in the heat storage device; putting the oxygen carrier into an oxygen generating device; after the heat accumulator is heated for a period of time, the fan is turned on; air enters the air preheater through an air inlet of the air preheater, then enters the reheater through an air outlet of the air preheater through an air inlet of the reheater, enters the heat storage device through an air outlet of the reheater, the air entering the heat storage device is heated through a heat accumulator in the heat storage device, a part of heated high-temperature air enters the premixer and the superheater through a first inlet of the premixer and an air inlet of the superheater respectively, and circulation begins;

step 2: adjusting an upper valve to enable an air outlet of a premixer to be respectively communicated with inlets of the oxygen absorption reactors through the upper valve, enabling high-temperature air in the premixer to enter a plurality of oxygen absorption reactors, enabling an oxygen carrier in the oxygen absorption reactors to be used as a carrier gas for oxidation reaction, enabling a steam outlet of a superheater to be communicated with one of inlets of the oxygen release reactors through the upper valve, enabling high-temperature steam in the superheater to enter the oxygen release reactors, enabling the oxygen carrier in the oxygen release reactors to be used as the carrier gas for oxygen release reaction to release oxygen, and enabling the rest oxygen release reactors to be in a closed state; adjusting a lower valve to enable outlets of the plurality of oxygen absorption reactors to be communicated with an oxygen-poor air inlet of the air preheater, and preheating cold air in the air preheater by high-temperature oxygen-poor air after oxygen absorption reaction; simultaneously, communicating the outlet of the oxygen release reactor in the step 2 with a heat source inlet of a reheater, carrying out secondary heat exchange on the mixed gas of oxygen and water vapor after the oxygen release reaction is completed and air in the reheater, then, allowing the mixed gas to enter a condenser through the heat source outlet of the reheater to generate pure oxygen, pressurizing the generated pure oxygen, and introducing the pressurized pure oxygen into an oxygen tank for later use;

step 3, after the reaction of the oxygen release reactor in the step 2 is finished, adjusting an upper valve and a lower valve to enable an inlet and an outlet of the oxygen release reactor in the step 2 to be in a closed state, communicating an inlet of a new oxygen release reactor with a high-temperature steam outlet of a superheater, enabling high-temperature steam in the superheater to enter the new oxygen release reactor, and enabling an oxygen carrier in the new oxygen release reactor to perform oxygen release reaction by taking high-temperature steam as a carrier gas to release oxygen; communicating the outlet of a new oxygen release reactor with the heat source inlet of a reheater, performing secondary heat exchange on the mixed gas of oxygen and steam after the oxygen release reaction is completed in the reheater and air, then introducing the mixed gas into a condenser through the heat source outlet of the reheater to generate pure oxygen, pressurizing the generated pure oxygen, introducing the pressurized pure oxygen into an oxygen tank for use, and repeating the steps until oxygen release of oxygen carriers of all the oxygen release reactors is completed;

and 4, step 4: after oxygen carriers in all the oxygen release reactors completely release oxygen, the oxygen carriers in a plurality of oxygen absorption reactors are completely oxidized; switching an upper valve to enable an air outlet in the premixer to be respectively communicated with inlets of a plurality of original oxygen release reactors through the upper valve, and enabling the oxygen carrier after oxygen release reaction to be oxidized and regenerated under the action of high-temperature air, wherein the original oxygen release reactor carries out oxygen absorption reaction; simultaneously enabling a high-temperature steam outlet to be communicated with an inlet of one original oxygen absorption reactor by the superheater, enabling the oxidized oxygen carrier to generate oxygen release reaction under the action of high-temperature steam, and enabling the rest original oxygen absorption reactors to be in a closed state, wherein the original oxygen absorption reactor performs oxygen release reaction; adjusting a lower valve to enable outlets of a plurality of original oxygen release reactors to be communicated with an oxygen-poor air inlet of the air preheater through the lower valve, and preheating cold air in the air preheater by high-temperature oxygen-poor air after oxygen release reaction; simultaneously, adjusting a lower valve to communicate an outlet of the primary endothermic reactor with a heat source inlet of a reheater, performing secondary heat exchange on the obtained oxygen and steam mixed gas and air in the reheater, and then generating pure oxygen through a condenser, wherein the generated pure oxygen is pressurized and then introduced into an oxygen tank for later use;

step 5, after the reaction of the original oxygen absorption reactor in the step 4 is finished, adjusting an upper valve and a lower valve to enable an inlet and an outlet of the original oxygen absorption reactor to be in a closed state, simultaneously enabling an inlet of a new original oxygen absorption reactor to be communicated with a high-temperature steam outlet of a superheater, enabling high-temperature steam in the superheater to enter the new original oxygen absorption reactor, and enabling an oxygen carrier in the new original oxygen absorption reactor to perform oxygen release reaction by taking high-temperature steam as carrier gas to release oxygen; communicating the outlet of a new original endothermic reactor with the heat source inlet of a reheater, performing secondary heat exchange on the mixed gas of oxygen and water vapor after the oxygen release reaction is completed in the reheater and air, then introducing the mixed gas into a condenser through the heat source outlet of the reheater to generate pure oxygen, pressurizing the generated pure oxygen, introducing the pressurized pure oxygen into an oxygen tank for use, and continuously repeating the steps until the oxygen release of all the endothermic reactors is completed;

step 6: and (5) continuously repeating the steps 2 to 5 after the oxygen releasing of all the oxygen absorption reactors is finished, so that the chemical chain oxygen generation system realizes continuous oxygen generation.

6. The oxygen generation method of the solar photothermal based chemical chain continuous oxygen generation system according to claim 5, wherein: the oxygen carrier in the step 1 is in a honeycomb structure, the specific surface area of the oxygen carrier in the structure is large, and the powder type oxygen carrier is soaked on the honeycomb body by adopting an impregnation method.

Technical Field

The invention belongs to the technical field of chemical chain oxygen generation based on solar heat storage and heat accumulation, and particularly relates to a chemical chain continuous oxygen generation system and method based on solar photo-heat.

Background

By developing the high-efficiency utilization technology of renewable energy sources, continuously improving the proportion of the renewable energy sources in the energy consumption structure of China becomes one of important ways for solving the problems of energy resource shortage and environmental pollution of China. Compared with renewable energy sources such as geothermal energy, biomass energy, wind energy and the like, solar energy has the characteristics of low cost, no regional limitation, cleanness, no pollution and the like, and is recognized as one of the most potential alternative energy sources. At present, the global environmental pollution is increasingly serious and the problem of resource exhaustion is more severe, and the development and utilization of solar energy are also one of the important ways to ensure the energy safety, promote the diversification of available energy and realize sustainable development.

The currently used oxygen production methods mainly include a cryogenic process (cryogenic rectification process), a pressure swing adsorption process and a membrane separation process. The deep cooling method oxygen production equipment is complex, the investment is huge, the capital cost and the operation cost are high, and the power consumption in the operation is large. The oxygen production concentration by the membrane separation method is low, and is generally between 27 and 45 percent. The pressure swing adsorption method requires clean air as an air source, and the air is purified when the pressure swing adsorption method is used in a polluted environment. Compared with the three oxygen generation technologies of the existing deep cooling method oxygen generation, the pressure swing adsorption method oxygen generation and the membrane separation method oxygen generation, the chemical chain oxygen generation technology has the advantages of high oxygen concentration, short starting time, low energy consumption, low cost, convenience in operation and the like. The working principle is that the metal oxide oxygen carrier is used for absorbing oxygen in air in an oxidation reactor at a certain temperature to form high-valence metal oxide; the oxygen carrier after oxygen absorption is subjected to oxygen decoupling reaction in a oxygen release reactor taking water vapor as carrier gas to generate oxygen, and the water vapor oxygen mixture is condensed to obtain pure oxygen, so that a chemical reaction chain is formed in a circulating reciprocating manner to achieve the continuous oxygen release process.

At present, chemical-looping oxygen generation is carried out by utilizing heat generated by an electric furnace or an industrial furnace, the oxygen generation by utilizing the industrial furnace needs fuel combustion to generate heat, fuel is wasted, and a large amount of CO is generated by the fuel combustion₂Greenhouse gases and NO_XAnd the like, which are harmful to the environment, require a great deal of money and energy to capture CO₂And flue gas denitration, can add extra cost for the enterprise, and is contradictory with low energy consumption low cost in industrial production.

Therefore, a chemical chain continuous oxygen generation system and method based on solar photo-thermal are provided to solve the problems.

Disclosure of Invention

The invention provides a chemical chain oxygen generation system and method based on solar photo-thermal, aiming at the problem of higher energy consumption in the process of generating oxygen by utilizing a chemical chain of an electric furnace or an industrial furnace.

A chemical-looping continuous oxygen generation system based on solar photo-thermal comprises a Fresnel lens field, a heat storage device, a premixer, a fan, an air preheater, a reheater, a condenser, a superheater, an evaporator and an oxygen generation device, wherein the Fresnel lens field focuses sunlight on the heat storage device, an outlet of the heat storage device is respectively connected with a high-temperature air inlet of the premixer and an air inlet of the superheater, a normal-temperature air inlet of the premixer is connected with a first outlet of the fan, a second outlet of the fan is connected with an air inlet of the air preheater, an air outlet of the superheater is connected with an air inlet of the evaporator, a steam outlet of the evaporator is connected with a steam inlet of the superheater, a steam outlet of the superheater and an air outlet of the premixer are respectively connected with two inlets of the oxygen generation device, and two outlets of the oxygen generation device are respectively connected with an oxygen-poor air inlet of the air preheater and a heat source inlet, the heat source outlet of the air preheater is connected with the atmosphere, the air inlet of the reheater is connected with the air outlet of the air preheater, the air outlet of the reheater is connected with the inlet of the heat storage device, and the heat source outlet of the reheater is connected with the inlet of the condenser.

The Fresnel lens field comprises a plurality of Fresnel lenses with line focusing, the Fresnel lenses are fixed on the Fresnel lenses through two matched frames on a Fresnel support, one side of each Fresnel lens is provided with equidistant insections, sunlight in a specified spectral range is reflected or refracted through the insections, and the sunlight is focused on the heat storage device through the Fresnel lens field. Incident light in different directions can be absorbed by adjusting the height and the angle of the Fresnel lens, and scattered light can also be absorbed; the irradiation temperature is controlled below 1200 ℃ by adjusting the angle and the height of the Fresnel lens, and the specific focusing temperature is adjusted according to the actual oxygen carrier.

The heat storage device comprises a columnar glass body, a lifting gate and a heat accumulator, wherein the columnar glass body, the lifting gate and the heat accumulator are made of a plurality of side steel plates, two end steel plates and ultra-high temperature glass, a heat storage device shell is composed of the side steel plates, the end steel plates and the lifting gate, a rotating shaft is arranged at the center of the end steel plate positioned below the heat storage device shell through a bearing, a bearing end plate is arranged on the lower surface of the end steel plate positioned below the heat storage device shell, a first gear is arranged on the part, positioned in the heat storage device shell, of the rotating shaft, a columnar glass body is arranged on the upper end face of the first gear, the first gear is meshed with a second gear, the first gear and the second gear are arranged at 90 degrees, the second gear is arranged on a motor output shaft fixed on the outer surface of the side steel plates, the heat resistance is high, the highest temperature can resist 1500 ℃, and the inner surfaces of the side steel plates, the end steel plates and the lifting gate are all provided with heat insulation layers; when sunlight exists, the lifting valve is opened, the sunlight penetrates through the columnar glass body made of the ultra-high temperature glass and is focused on the heat accumulator for heat accumulation, and when the sunlight does not exist, the lifting valve is closed to keep the heat of the heat accumulator; the heat energy is stored so as to ensure that the energy storage body in the heat storage device can still emit heat even under the conditions of no sunshine such as at night, cloudy days or cloudy days, and the like, and the system can continuously and stably run by heating working media.

The oxygen generation device comprises a plurality of oxygen release reactors, a plurality of oxygen absorption reactors, an upper valve and a lower valve, wherein two inlets of the upper valve are respectively connected with a steam outlet of a superheater and an air outlet of a premixer, an outlet of the upper valve is respectively connected with inlets of the oxygen release reactors and the oxygen absorption reactors, oxygen carriers are arranged in the oxygen absorption reactors and the oxygen release reactors, outlets of the oxygen absorption reactors and the oxygen release reactors are respectively connected with an inlet of the lower valve, and two outlets of the lower valve are respectively connected with an oxygen-poor air inlet of an air preheater and a heat source inlet of a reheater; the upper valve and the lower valve are used for switching a passage connected with the oxygen release reactor and the oxygen absorption reactor, when high-temperature steam is introduced into the oxygen release reactor, the oxygen carrier in the oxygen release reactor performs reduction reaction to release oxygen, and the temperature of the oxygen carrier after reaction is reduced because the oxygen release reaction is an endothermic reaction; hot air is introduced into the oxygen absorption reactor, and the temperature of the oxygen carrier is increased after the oxygen absorption reaction because the oxygen absorption reaction is an exothermic reaction.

An oxygen generation method of a chemical chain continuous oxygen generation system based on solar photo-thermal comprises the following steps:

step 1: opening a lifting gate of the heat storage device, and focusing sunlight on a cylindrical glass body made of ultra-high temperature glass of the heat storage device through a Fresnel lens line by adjusting the height and the angle of the Fresnel lens to heat a heat accumulator in the heat storage device; putting the oxygen carrier into an oxygen generating device; after the heat accumulator is heated for a period of time, the fan is turned on; air enters the air preheater through an air inlet of the air preheater, then enters the reheater through an air outlet of the air preheater through an air inlet of the reheater, enters the heat storage device through an air outlet of the reheater, the air entering the heat storage device is heated through a heat accumulator in the heat storage device, a part of heated high-temperature air enters the premixer and the superheater through a first inlet of the premixer and an air inlet of the superheater respectively, and circulation begins;

step 2: adjusting an upper valve to enable an air outlet of a premixer to be respectively communicated with inlets of the oxygen absorption reactors through the upper valve, enabling high-temperature air in the premixer to enter a plurality of oxygen absorption reactors, enabling an oxygen carrier in the oxygen absorption reactors to be used as a carrier gas for oxidation reaction, enabling a steam outlet of a superheater to be communicated with one of inlets of the oxygen release reactors through the upper valve, enabling high-temperature steam in the superheater to enter the oxygen release reactors, enabling the oxygen carrier in the oxygen release reactors to be used as the carrier gas for oxygen release reaction to release oxygen, and enabling the rest oxygen release reactors to be in a closed state; adjusting a lower valve to enable outlets of the plurality of oxygen absorption reactors to be communicated with an oxygen-poor air inlet of the air preheater, and preheating cold air in the air preheater by high-temperature oxygen-poor air after oxygen absorption reaction; simultaneously, communicating the outlet of the oxygen release reactor in the step 2 with a heat source inlet of a reheater, carrying out secondary heat exchange on the mixed gas of oxygen and water vapor after the oxygen release reaction is completed and air in the reheater, then, allowing the mixed gas to enter a condenser through the heat source outlet of the reheater to generate pure oxygen, pressurizing the generated pure oxygen, and introducing the pressurized pure oxygen into an oxygen tank for later use;

step 3, after the reaction of the oxygen release reactor in the step 2 is finished, adjusting an upper valve and a lower valve to enable an inlet and an outlet of the oxygen release reactor in the step 2 to be in a closed state, communicating an inlet of a new oxygen release reactor with a high-temperature steam outlet of a superheater, enabling high-temperature steam in the superheater to enter the new oxygen release reactor, and enabling an oxygen carrier in the new oxygen release reactor to perform oxygen release reaction by taking high-temperature steam as a carrier gas to release oxygen; communicating the outlet of a new oxygen release reactor with the heat source inlet of a reheater, performing secondary heat exchange on the mixed gas of oxygen and steam after the oxygen release reaction is completed in the reheater and air, then introducing the mixed gas into a condenser through the heat source outlet of the reheater to generate pure oxygen, pressurizing the generated pure oxygen, introducing the pressurized pure oxygen into an oxygen tank for use, and repeating the steps until oxygen release of oxygen carriers of all the oxygen release reactors is completed;

and 4, step 4: after oxygen carriers in all the oxygen release reactors completely release oxygen, the oxygen carriers in a plurality of oxygen absorption reactors are completely oxidized; switching an upper valve to enable an air outlet in the premixer to be respectively communicated with inlets of a plurality of original oxygen release reactors through the upper valve, and enabling the oxygen carrier after oxygen release reaction to be oxidized and regenerated under the action of high-temperature air, wherein the original oxygen release reactor carries out oxygen absorption reaction; simultaneously enabling a high-temperature steam outlet to be communicated with an inlet of one original oxygen absorption reactor by the superheater, enabling the oxidized oxygen carrier to generate oxygen release reaction under the action of high-temperature steam, and enabling the rest original oxygen absorption reactors to be in a closed state, wherein the original oxygen absorption reactor performs oxygen release reaction; adjusting a lower valve to enable outlets of a plurality of original oxygen release reactors to be communicated with an oxygen-poor air inlet of the air preheater through the lower valve, and preheating cold air in the air preheater by high-temperature oxygen-poor air after oxygen release reaction; simultaneously, adjusting a lower valve to communicate an outlet of the primary endothermic reactor with a heat source inlet of a reheater, performing secondary heat exchange on the obtained oxygen and steam mixed gas and air in the reheater, and then generating pure oxygen through a condenser, wherein the generated pure oxygen is pressurized and then introduced into an oxygen tank for later use;

step 5, after the reaction of the original oxygen absorption reactor in the step 4 is finished, adjusting an upper valve and a lower valve to enable an inlet and an outlet of the original oxygen absorption reactor to be in a closed state, simultaneously enabling an inlet of a new original oxygen absorption reactor to be communicated with a high-temperature steam outlet of a superheater, enabling high-temperature steam in the superheater to enter the new original oxygen absorption reactor, and enabling an oxygen carrier in the new original oxygen absorption reactor to perform oxygen release reaction by taking high-temperature steam as carrier gas to release oxygen; communicating the outlet of a new original endothermic reactor with the heat source inlet of a reheater, performing secondary heat exchange on the mixed gas of oxygen and water vapor after the oxygen release reaction is completed in the reheater and air, then introducing the mixed gas into a condenser through the heat source outlet of the reheater to generate pure oxygen, pressurizing the generated pure oxygen, introducing the pressurized pure oxygen into an oxygen tank for use, and continuously repeating the steps until the oxygen release of all the endothermic reactors is completed;

step 6: and (5) continuously repeating the steps 2 to 5 after the oxygen releasing of all the oxygen absorption reactors is finished, so that the chemical chain oxygen generation system realizes continuous oxygen generation.

The oxygen carrier in the step 1 is in a honeycomb structure, the specific surface area of the oxygen carrier in the structure is large, and the powder type oxygen carrier is soaked on the honeycomb body by adopting an impregnation method.

The invention has the beneficial effects that:

1. the unit oxygen production energy consumption of the chemical chain oxygen production system is only 26% of that of the deep cooling method oxygen production, the equipment cost is far lower than that of the deep cooling method oxygen production, the energy-saving purpose is greatly achieved, but the oxygen carrier can absorb and release the oxygen process at a specific temperature, so the oxygen production process can still have the energy consumption of an electric furnace or an industrial furnace. This application is through making chemical chain oxygen generation system and solar photothermal heat storage system looks coupling, and the hot-air absorbs the solar photothermal back and produces steam earlier and inhale the oxygen release reaction, and then the high temperature lean oxygen air that the reaction produced preheats the cold air. After the superheated steam and oxygen mixed gas obtained after the oxygen release reaction secondarily heats the air, condensation treatment is carried out to obtain pure oxygen, and the preheated air enters the heat storage device to be subjected to convection heat exchange to form high-temperature air to continuously participate in the circulation. The energy of the sun is utilized to produce oxygen, so that the large power consumption is not generated, the fuel does not need to be combusted to generate heat, and further, any gas harmful to the environment is not generated; the whole system realizes the cascade utilization of energy, achieves the aim of low-energy-consumption oxygen generation, and accords with the modern theme of energy conservation and emission reduction.

2. By developing the high-efficiency utilization technology of renewable energy sources, continuously improving the proportion of the renewable energy sources in the energy consumption structure of China becomes one of important ways for solving the problems of energy resource shortage and environmental pollution of China. Compared with renewable energy sources such as geothermal energy, biomass energy, wind energy and the like, solar energy has the characteristics of low cost, no regional limitation, cleanness, no pollution and the like, and is recognized as one of the most potential alternative energy sources.

3. The oxygen generation system of the invention determines the number of the oxygen release reactors and the oxygen absorption reactors according to the different oxygen absorption and release time of different oxygen carriers by the ratio of the oxygen absorption and release time, thereby realizing continuous oxygen generation.

Drawings

FIG. 1 is a schematic diagram of a chemical-looping continuous oxygen generation system based on solar photo-thermal according to an embodiment of the invention;

FIG. 2 is a schematic view of a heat storage device of a solar photo-thermal based chemical-looping continuous oxygen generation system according to an embodiment of the invention;

1-Fresnel lens field, 2-heat storage device, 201-side steel plate, 202-end steel plate, 203-columnar glass body, 204-lifting gate, 205-first gear, 206-second gear, 207-support leg, 208-motor, 3-premixer, 4-blower, 5-air preheater, 6-reheater, 7-condenser, 8-superheater, 9-evaporator, 10-first endothermic reactor, 11-second endothermic reactor, 12-first oxygen release reactor, 13-second oxygen release reactor, 14-upper six-way valve and 15-lower six-way valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, a solar photothermal chemical-looping continuous oxygen generation system comprises a fresnel lens field 1, a heat storage device 2, a premixer 3, a fan 4, an air preheater 5, a reheater 6, a condenser 7, a superheater 8, an evaporator 9 and an oxygen generation device, wherein the fresnel lens field 1 focuses sunlight on the heat storage device 2, an outlet of the heat storage device 2 is respectively connected with a high-temperature air inlet of the premixer 3 and an air inlet of the superheater 8, a normal-temperature air inlet of the premixer 3 is connected with a first outlet of the fan 4, a second outlet of the fan 4 is connected with the air inlet of the air preheater 5, an air outlet of the superheater 8 is connected with the air inlet of the evaporator 9, an air outlet of the evaporator 9 is communicated with the atmosphere, a steam outlet of the evaporator 9 is connected with a steam inlet of the superheater 8, a water inlet of the evaporator 9 is connected with a water pump, the steam outlet of the superheater 8 and the air outlet of the premixer 3 are respectively connected with two inlets of the oxygen generator, two outlets of the oxygen generator are respectively connected with the oxygen-deficient air inlet of the air preheater 5 and the heat source inlet of the reheater 6, the heat source outlet of the air preheater 5 is connected with the atmosphere, the air inlet of the reheater 6 is connected with the air outlet of the air preheater 5, the air outlet of the reheater 6 is connected with the inlet of the heat storage device 2, and the heat source outlet of the reheater 6 is connected with the inlet of the condenser 7.

Fresnel lens field 1 includes that a plurality of focusing modes constitute for the Fresnel lens of line focus, and Fresnel lens passes through two frames of last complex of Fresnel support and fixes Fresnel lens on Fresnel lens, and one side of Fresnel lens has the insection of equidistance, reflects or refracts appointed spectral range's sunshine through setting up of insection, and sunshine passes through Fresnel lens field 1 focus on heat-retaining device 2. Incident light in different directions can be absorbed by adjusting the height and the angle of the Fresnel lens, and scattered light can also be absorbed; the irradiation temperature is controlled below 1200 ℃ by adjusting the angle and the height of the Fresnel lens, and the specific focusing temperature is adjusted according to the actual oxygen carrier.

The heat storage device 2 comprises a plurality of side steel plates 201, two end steel plates 202, a cylindrical glass body 203 made of ultra-high temperature glass, a lifting gate 204 and a heat accumulator, wherein the side steel plates 201, the end steel plates 202 and the lifting gate 204 form a heat storage device shell, a rotating shaft is arranged at the center of the end steel plate 202 positioned below the heat storage device shell through a bearing, a bearing end plate is arranged on the lower surface of the end steel plate 202 positioned below the heat storage device shell, a first gear 205 is arranged in the rotating shaft positioned inside the heat storage device shell, a cylindrical glass body 203 is arranged on the upper end surface of the first gear 205 and is specifically cylindrical, the first gear 205 is meshed with a second gear 206, the first gear 205 and the second gear 206 are arranged at 90 degrees, the second gear 206 is arranged on an output shaft of a motor 208 fixed at the outer surface of the side steel plates 201, supporting legs 207 are arranged at four corners, the heat accumulator is a heat storage ball, a ceramic honeycomb body or gravel, the lifting gate 204 is used for shielding ultrahigh-temperature glass, the ultrahigh-temperature glass has good light transmittance and high heat resistance, can resist the high temperature of 1500 ℃ at most, and the inner surfaces of the side steel plates 201, the end steel plates 202 and the lifting gate 204 are all provided with heat insulation layers; when sunlight exists, the lifting valve 204 is opened, the sunlight penetrates through the columnar glass body 203 made of the ultra-high temperature glass and is focused on the heat accumulator for heat storage, and when the sunlight does not exist, the lifting valve 204 is closed to preserve heat of the heat accumulator; the heat energy is stored so as to ensure that the energy storage body in the heat storage device 2 can still emit heat even under the conditions of no sunshine such as at night, cloudy days or cloudy days, and the like, and the system can continuously and stably operate by heating working media.

The oxygen generation device comprises a first oxygen absorption reactor 10, a second oxygen absorption reactor 11, a first oxygen release reactor 12, a second oxygen release reactor 13, an upper six-way valve 14 and a lower six-way valve 15, wherein two inlets of the upper six-way valve 14 are respectively connected with an air outlet of the premixer 3 and a steam outlet of the superheater 8, four outlets of the upper six-way valve 14 are respectively connected with inlets of the first oxygen release reactor 12, the second oxygen release reactor 13, the first oxygen absorption reactor 10 and the second oxygen absorption reactor 11, outlets of the first oxygen release reactor 12, the second oxygen release reactor 13, the first oxygen absorption reactor 10 and the second oxygen absorption reactor 11 are respectively connected with four inlets of the lower six-way valve 15, and two outlets of the lower six-way valve 15 are respectively connected with an oxygen-poor air inlet of the air preheater 5 and a heat source inlet of the reheater 6. The upper six-way valve 14 and the lower six-way valve 15 are used for switching the passages connected with the first oxygen release reactor 12, the second oxygen release reactor 13, the first aerobic reactor 10 and the second aerobic reactor 11, when high-temperature steam is introduced into the first oxygen release reactor 12 and the second oxygen release reactor 13, oxygen carriers in the first oxygen release reactor 12 and the second oxygen release reactor 13 are subjected to reduction reaction to release oxygen, and the temperature of the oxygen carriers after reaction is reduced because the oxygen release reaction is an endothermic reaction; hot air is introduced into the first oxygen absorption reactor 10 and the second oxygen absorption reactor 11, and the oxygen carrier temperature rises after the oxygen absorption reaction because the oxygen absorption reaction is an exothermic reaction.

An oxygen generation method of a chemical-chain continuous oxygen generation system based on solar photo-thermal energy takes a copper-manganese-based composite oxygen carrier as an example, the oxygen absorption time is 10min, and the oxygen release time is 5 min; the oxygen absorption temperature of the copper-manganese-based composite oxygen carrier is 600-700 ℃, the oxygen-poor air temperature after the oxygen absorption is finished is 600-700 ℃, the oxygen release temperature is 800-900 ℃, and the temperature of the mixed gas of hot steam and oxygen is 800-900 ℃, and the method comprises the following steps:

step 1: opening a lifting gate of the heat storage device 2, focusing sunlight on a cylindrical glass body 203 made of ultra-high temperature glass of the heat storage device 2 through a Fresnel lens line by adjusting the height and the angle of the Fresnel lens, and heating a heat accumulator in the cylindrical glass body 203 by driving the cylindrical glass body 203 to rotate through a motor 208; respectively putting the copper-manganese-based composite oxygen carrier into a first oxygen absorption reactor 10, a second oxygen absorption reactor 11, a first oxygen release reactor 12 and a second oxygen release reactor 13; after the heat accumulator is heated, the fan 4 is turned on; air enters the air preheater 5 through an air inlet of the air preheater 5, then enters the reheater 6 through an air outlet of the air preheater 5 through an air inlet of the reheater 6, enters the heat storage device 2 through an air outlet of the reheater 6, heats the air entering the heat storage device 2 through a heat accumulator in the heat storage device 2, and partial high-temperature air with the heated temperature of 1000 ℃ enters the premixer 3 and the superheater 8 through a first inlet of the premixer 3 and an air inlet of the superheater 8 respectively, so that circulation starts;

step 2: adjusting an upper six-way valve 14 to enable an air outlet of a premixer 3 to be communicated with inlets of a first oxygen absorption reactor 10 and a second oxygen absorption reactor 11, enabling high-temperature air with the temperature of 500 ℃ in the premixer 3 to enter the first oxygen absorption reactor 10 and the second oxygen absorption reactor 11, enabling oxygen carriers in the first oxygen absorption reactor 10 and the second oxygen absorption reactor 11 to perform oxidation reaction by taking the high-temperature air as carrier gas, simultaneously enabling a steam outlet of a superheater 8 to be communicated with an inlet of a first oxygen release reactor 12, enabling high-temperature steam with the temperature of 900 ℃ in the superheater 8 to enter a first oxygen release reactor 12, enabling the oxygen carriers in the first oxygen release reactor 12 to perform oxygen release reaction by taking high-temperature steam as carrier gas to release oxygen, and enabling an inlet of the second oxygen release reactor 12 to be in a; simultaneously adjusting a lower six-way valve 15 to enable outlets of a first oxygen absorption reactor 10 and a second oxygen absorption reactor 11 to be communicated with an oxygen-poor air inlet of the air preheater 5, preheating cold air in the air preheater 5 by high-temperature oxygen-poor air after oxygen absorption reaction is completed, and enabling the temperature of the oxygen-poor air discharged by the air preheater 5 to be 120 ℃; meanwhile, the outlet of the first oxygen release reactor 12 is communicated with the heat source inlet of the reheater 6, the mixed gas of oxygen and water vapor after the oxygen release reaction is subjected to secondary heat exchange with the heated air with the temperature of 210 ℃ in the reheater 6, the mixed gas enters the condenser 7 through the heat source outlet of the reheater 6 to generate pure oxygen, the generated pure oxygen is pressurized and then is introduced into the oxygen tank for use, and the air with the temperature of 500 ℃ after heat exchange enters the heat storage device 2 through the air outlet of the reheater 6;

step 3, after the first oxygen release reactor 12 reacts for 5min, adjusting an upper six-way valve 14 and a lower six-way valve 15 to enable an inlet and an outlet of the first oxygen release reactor 12 to be in a closed state, enabling an inlet of a second oxygen release reactor 13 to be communicated with a high-temperature steam outlet of a superheater 8, enabling high-temperature steam in the superheater 8 to enter the second oxygen release reactor 13, and enabling oxygen carriers in the second oxygen release reactor 13 to perform oxygen release reaction to release oxygen by taking high-temperature steam as carrier gas; the outlet of the second oxygen release reactor 13 is communicated with the heat source inlet of the reheater 6, the mixed gas of oxygen and water vapor after the oxygen release reaction is subjected to secondary heat exchange with air in the reheater 6 and then enters the condenser 7 through the heat source outlet of the reheater 6 to generate pure oxygen, and the generated pure oxygen is pressurized and then is introduced into the oxygen tank for use;

and 4, step 4: after 5min, the oxygen carrier in the second oxygen release reactor 13 is completely released, and the oxygen carrier in the first oxygen absorption reactor 10 and the second oxygen absorption reactor 11 is completely oxidized; switching an upper six-way valve 14 to enable an air outlet in the premixer 3 to be communicated with inlets of a first oxygen release reactor 12 and a second oxygen release reactor 13, and carrying out oxidation regeneration on the oxygen carrier after oxygen release reaction under the action of high-temperature air; meanwhile, the superheater 8 enables a high-temperature steam outlet to be communicated with an inlet of the first oxygen absorption reactor 10, and the oxidized oxygen carrier is subjected to oxygen release reaction under the action of high-temperature steam; adjusting a lower six-way valve 15 to enable outlets of a first oxygen release reactor 12 and a second oxygen release reactor 13 to be communicated with an oxygen-poor air inlet of the air preheater 5, and preheating cold air in the air preheater 5 by high-temperature oxygen-poor air after oxygen release reaction; simultaneously, adjusting a lower six-way valve 15 to enable an outlet of a first oxygen absorption reactor 10 to be communicated with a heat source inlet of a reheater 6, enabling the obtained mixed gas of oxygen and steam to perform secondary heat exchange with air in the reheater 6, and then generating pure oxygen through a condenser 7, pressurizing the generated pure oxygen and introducing the pressurized pure oxygen into an oxygen tank for later use;

step 5, after the first aerobic reactor 10 reacts for 5min, adjusting an upper six-way valve 14 and a lower six-way valve 15 to enable an inlet and an outlet of the first aerobic reactor 10 to be in a closed state, enabling an inlet of a second aerobic reactor 11 to be communicated with a high-temperature steam outlet of a superheater 8, enabling high-temperature steam in the superheater 8 to enter the second aerobic reactor 11, and enabling an oxygen carrier in the second aerobic reactor 11 to perform oxygen release reaction by taking high-temperature steam as a carrier gas to release oxygen; the outlet of the second oxygen absorption reactor 11 is communicated with the heat source inlet of the reheater 6, the mixed gas of oxygen and water vapor after the oxygen release reaction is subjected to secondary heat exchange with air in the reheater 6 and then enters the condenser 7 through the heat source outlet of the reheater 6 to generate pure oxygen, and the generated pure oxygen is pressurized and then is introduced into the oxygen tank for use;

step 6: after 5min, the oxygen carrier in the second oxygen absorption reactor 11 completely releases oxygen, and the step 2 to the step 5 are continuously repeated, so that the chemical chain oxygen generation system realizes continuous oxygen generation.

The above-described systems and methods are merely illustrative of the technical solutions and principles of the present system and are not limiting. It will be apparent to those skilled in the art that modifications may be made to the systems and arrangements described above or equivalents may be substituted for some or all of the features described herein, such as increasing or decreasing the number of oxygen release reactors. It should be understood that any modifications, substitutions and the like which fall within the spirit and scope of the principles of the present invention are intended to be included within the scope of the present invention.