TWI747571B - Interconnected fluidized bed reactor - Google Patents

Abstract

Present invention is related to an interconnected fluidized bed reactor having an air reactor connected with a fuel reactor. The air reactor is a hollow pipe comprising at least a baffle plate with a hole configured thereon. A top of the air reactor further connects with a tube which is partially merged inside the hollow pip of the air reactor. A top of the side tube is further connected with a connection mechanism. The fuel reactor is also a hollow pipe connected with the air reactor through the said connection mechanism. An outlet and an inlet are configured to be placed on a top and a bottom of the fuel reactor. The bottom of the air reactor is connected with the fuel reactor through a closed loop unit. As performing the chemical looping process by the present invention, an oxygen carrier as a particle form will be fluidized and continuously flew inside the reactors of the present invention. The baffle plate and the closed loop unit could benefit the oxygen carrier having a more completely and thoroughly mixing condition with the air or the fuel. The reactors of the present invention could also prolong or control a residence time and circulation rate of the oxygen carrier in the whole system so as to provide a better and more efficient reactor compared to the conventional technique.

Description

New type series fluidized bed reactor

The present invention relates to a technology for capturing and storing carbon dioxide, in particular to a technical field of capturing and storing carbon dioxide by using a series fluidized bed reactor using a chemical looping combustion process (Chemical Looping Process Combustion).

The primary technical idea of the present invention is to provide a new series fluidized bed reactor, which adopts the principle of chemical loop combustion process to capture and store carbon dioxide, and has the advantages of low exhaust pollution and high power generation efficiency. The content is explained and described in detail, but the improved features provided by the present invention are not used to limit the use in this application, and other changes with the same function or equivalent should be covered by the present invention.

Since the industrial revolution, the high level of human activities and industrial development have brought about a great leap forward in technology and economy, and also greatly improved the well-being of human life. We no longer rely on fishing and hunting for food and clothing, but can use industrial machines to produce mass production. Manufacturing necessities of life also contributes to the extension of human health and survival.

However, with the rapid population growth and vigorous industrial activities, this has also led to the problem of the greenhouse effect. The impact of global warming on the climate and the environment over the past century has been a shared bet, and it has negatively affected the global natural ecology and social economy, and this problem has not been alleviated. The global environment on which our next generation depends It is worrying how resources should be developed in a sustainable manner.

In general, the progress of science and technology is inseparable from the development of energy technology. Therefore, the environmental impact caused by various power plants and the development of green energy are very important parts of various environmental protection issues. Thermal power generation is one of the most widely used power generation methods. It burns fossil fuels such as coal, oil, natural gas and so on to heat water to generate steam to drive generators to output electricity. Compared with other power generation methods, the greenhouse gas and air pollution produced by thermal power generation are relatively serious. Generally speaking, in addition to reducing carbon dioxide production, carbon dioxide emissions reduction can also be achieved through storage or reuse.

However, in addition to carbon dioxide, the exhaust gas emitted by thermal power plants also contains pollutants such as nitrogen oxides. To achieve a reduction in carbon dioxide emissions through storage and reuse, the above-mentioned pollutants must be separated. This separation process is quite energy-consuming, and the power generation of the power plant must be supplied to this separation process, which is tantamount to reducing the power generation efficiency of the thermal power plant.

In order to solve the above problems, a chemical loop combustion process technology that uses a metal oxygen carrier to replace air as a combustion-supporting material has been developed. The chemical loop combustion process uses two fluidized bed reactors, namely a fuel reactor and air. The air reactor generates heat by alternately performing reduction and oxidation reactions. In detail, the fuel reacts with the metal oxygen carrier in the fuel reactor. This reaction is a reduction reaction for the metal oxygen carrier, so the metal oxygen carrier will be reduced to metal after the reaction. Then, the reduced metal is sent to the air reactor to produce an oxidation reaction with air or other gases that can supply oxygen atoms, and then form a metal oxygen carrier, which can be supplied to the fuel reactor for recirculation. The total reaction of the fuel reactor and the air reactor is an exothermic reaction, which can maintain the operation of the system.

Since the metal oxygen carrier in the chemical loop combustion process provides the oxygen atoms required for the reaction, which is different from the traditional combustion reaction in which the oxygen atoms are provided by air, the exhaust gas produced after combustion is condensed to remove water vapor. It is carbon dioxide with a content of up to 99%. Such scalar carbon dioxide can be directly stored or reused without going through the high-energy gas separation process. Therefore, the chemical loop combustion process is beneficial to the reduction of carbon dioxide emissions in thermal power plants, and at the same time, there is no need to waste energy in separation. The gas process, in other words, the energy generation efficiency is better.

However, the operating parameters of the existing chemical loop combustion program system have a relatively low range of operating parameters, including the amount of oxygen carrier and insufficient gas flow rates, which will cause a large reactor response. Therefore, the operation is limited. In addition, the fuel reactor is simple The bubbling design enables part of the fuel to be transported to the bed surface before it has reacted, resulting in incomplete reaction; the air reactor is designed with insufficient air volume, so that when the fuel increases, the oxygen volume is insufficient to completely oxidize the oxygen carrier, and under long-term operation There is a risk of system downtime.

In order to solve the aforementioned shortcomings of the existing chemical loop combustion program system, the present invention provides a new series fluidized bed reactor, which adopts the principle of the chemical loop combustion program to capture and store carbon dioxide, in addition to being able to correlate industry and energy The carbon dioxide produced by the source is concentrated and stored to avoid the emission of carbon dioxide. The heat energy generated also has the advantage of high power generation efficiency and improves the shortcomings of incomplete fuel reaction or insufficient gas volume.

The present invention provides a new type series fluidized bed reactor, which comprises: an air reactor, which is a hollow tube body arranged vertically, and at least one orifice plate is radially arranged inside the tube body, and the orifice plate is The inside of the tube of the air reactor has a conformal shape and size, and an orifice is provided on the plate; The bottom part of the submerged riser pipe is sleeved inside the tube body of the air reactor, and the top of the submerged riser pipe is connected with the communicating device; a fuel reactor is a hollow pipe body vertically arranged, and the top of the submerged riser is connected to the The communicating device is connected and is provided with a fuel reactor discharge port, the bottom of which is provided with a fuel reactor feed port; and the air reactor is connected with the bottom of the fuel reactor by a closed loop device.

Wherein, the tube wall inside the tube body of the fuel reactor includes a number of inclined and staggered baffles.

Wherein, the baffle and the tube wall inside the fuel reactor tube form an angle of 60 degrees.

Wherein, four baffles are arranged inside the tube body of the fuel reactor, and each baffle is staggered and inclined.

Wherein, the other side of the top of the fuel reactor is connected with a cyclone separator and a storage tank in order from top to bottom, and the bottom of the storage tank is provided with another closed loop device to communicate with the bottom of the fuel reactor.

Wherein, a second feed port of the fuel reactor is arranged in the fuel reactor between the baffles.

Among them, an oxygen carrier permeates an oxygen-containing gas and a fuel in the new tandem fluidized bed reactor as a chemical loop reaction process.

Wherein, the oxygen carrier includes metal oxide particles, and the metal includes iron (Fe), nickel (Ni), copper (Cu), manganese (Mn), titanium (Ti), or cobalt (Co).

Wherein, the oxygen-containing gas contains air or oxygen; and the fuel is a gaseous or solid fuel.

From the above description, it can be known that the present invention has the following advantageous effects and advantages:

1. With the new tandem fluidized bed reactor of the present invention, the oxygen carrier particles can flow smoothly between the reactors. The special baffles, orifice plates, and local structure settings and connections enable the oxygen carrier to be in sufficient quantity And fully mixed and reacted with gas and fuel, the overall system has a controllable residence time and circulation rate, and the overall particle flow is stable, making the reactor pressure stable and safe for long-term operation.

2. The invention uses a specific structure to stabilize the flow of particles in the system. It has a wide range of operating gas volume and controllable solids circulation rate capabilities. Most importantly, its design can enhance the effect of heat and mass transfer inside the reactor and increase the reactants. The simulation software and the actual cold state model have also successfully verified the functionality of these specific structures. The special structure of each component allows the particles to flow in each part in sequence, without the phenomenon of back mixing and gas mixing. Can provide stable fluidization and a wide range of gas volume operation.

The present invention adopts chemical looping process (chemical looping process, CLP), which is considered to be an important combustion technology with good energy efficiency and carbon dioxide capture. It controls the ratio of oxygen carrier/inert carrier and the solid circulation rate of the system, which can reduce the fuel Partially oxidized to form combustible gas to achieve the function of resource reuse. The development of the program mainly includes three parts: oxygen carrier, fuel and reactor design. The specific applicable objects of the present invention include any application of the chemical loop combustion program. For example, carbon dioxide, power generation, hydrogen production, chemical synthesis or treatment of waste solvents containing polymers, etc., provide a high-efficiency new series fluidized bed reactor.

In order to understand the technical features and practical effects of the present invention in detail, and implement it in accordance with the content of the specification, a preferred embodiment as shown in the figure is further used and described in detail as follows. Among them, the following description may use terms such as "one", "two" or "first", "second" to describe various parts or elements, but they are not necessarily used as quantitative quantifiers, nor are they used to limit the elements or parts to specific The characteristics or relationships, and the several implementation examples cited are also only exemplary expressions of the technology provided by the present invention, and should not be interpreted as the present invention only includes these embodiments, other equivalent or similar logical concept changes, All should be covered by the present invention.

Please refer to FIGS. 1 to 3A, which are a first preferred embodiment of a novel series fluidized bed reactor 10 of the present invention, which mainly includes an air reactor 11, a closed loop device 12, and a fuel reactor in communication with each other. 13. Wherein, the closed loop device 12 is arranged between the air reactor 11 and the fuel reactor 13, and the air reactor 11 and the fuel reactor 13 are in fluid communication with each other, as shown in the first preferred embodiment in FIG. 1 In an embodiment, the closed loop device 12 is arranged at a position close to the bottom of the air reactor 11 and the fuel reactor 13. The air reactor 11 and the fuel reactor 13 also include another communication device 14 at the same time. As shown in FIG. 1, the communication device 14 is arranged near the top position between the air reactor 11 and the fuel reactor 13 In this way, the air reactor 11 and the fuel reactor 13 achieve the effect of fluid communication through the closed loop device 12 and the communication device 14.

"Air Reactor"

As shown in Figure 2A, in the first preferred embodiment of the present invention, the air reactor 11 has a hollow tube body vertically arranged in the structural design, and at least one orifice plate 111 is radially provided inside the tube body. The orifice plate 111 has a shape and size conforming to the inside of the tube body of the air reactor 11 and an orifice 111 is provided on the plate body. Preferably, as provided in this embodiment, the orifice plate 111 is provided in two spaced apart inside the tube body of the air reactor 11, and the orifice 111 is arranged in the center of the orifice plate 111 and has holes The size is 20mm.

The air reactor 11 is provided with an air reactor inlet 113 at the bottom of the tube body, and a submerged riser 112 is connected at the top. The so-called submerged design means that the bottom part of the submerged riser 112 is sleeved on Inside the tube body of the air reactor 11, the top of the submerged riser 112 is connected to the communication device 14.

"Fuel Reactor"

In the first preferred embodiment of the present invention as shown in Figures 1 and 2B, the bottom of the fuel reactor 13 is provided with a fuel reactor first feed port 131, for example, a feed pipe rack connected to the fuel reactor 13 bottom of. A fuel reactor discharge port 135 is provided on the top of the fuel reactor 13.

The fuel reactor 13 is also a vertical hollow tube body. The tube wall inside the tube body includes a number of inclined and staggered baffle plates 132, as shown in FIG. 2B, as shown in this embodiment. In the example, there are four spaced and staggered arrangement, and each baffle 132 extends on the tube wall of the fuel reactor 13 to form an inclined state of 60 degrees and does not completely block the communication state in the tube.

One side of the top of the fuel reactor 13 is connected and communicated with the submerged riser 112 of the air reactor 11 by the communicating device 14, and the other side of the top is connected with a cyclone in order from top to bottom. 133 and a storage tank 134 are connected and communicated. The bottom of the storage tank 134 is provided with another closed loop device 12', as shown in FIG. 3B, to communicate with the bottom of the fuel reactor 13. Wherein, the way in which the top of the fuel reactor 13 communicates with the cyclone separator 133 may preferably be a pipe channel extending from the communication device 14, or may be connected by other pipe materials.

The present invention then describes and explains the functions and interaction modes and states of the previously disclosed components and elements.

Please refer to FIG. 4, the novel tandem fluidized bed reactor 10 provided by the present invention adopts a chemical loop procedure, and the carbon dioxide generated during the combustion of the system is captured and even collected. First of all, the overall system operation of the present invention preferably starts by placing an inert gas carrying an oxygen carrier 20 into the fuel reactor 13, and a fuel 30 from the first fuel reactor of the fuel reactor 13 at the same time. The feed port 131 passes into the fuel reactor 13, and the oxygen carrier 20 and the fuel 30 are mixed and combusted inside the fuel reactor 13. The fuel reactor 13 used in this embodiment preferably adopts a bubbling fluidized bed, mainly for the reaction site where the oxygen carrier 20 and the fuel 30 are combusted.

The oxygen carrier 20 is preferably metal oxide particles, such as iron (Fe), nickel (Ni), copper (Cu), manganese (Mn), titanium (Ti) or cobalt (Co) metal oxide particles, including But not limited to copper oxide (CuO), iron trioxide (Fe ₂ O ₃ ) or titanium dioxide (TiO ₂ ), etc. The selection can be based on the oxygen compatibility, cost, reactivity, mechanical strength or long-term recycling of the metal And other factors to be evaluated. The fuel 30 may be in gas or solid form, such as coal, natural gas or synthetic gas, such as coal gas or methane. The oxygen carrier 20 and the fuel 30 undergo a combustion reaction in the fuel reactor 13 to reduce the oxygen carrier 20. The reaction equation is preferably the following formula (1), taking the fuel 30 as an alkane as an example, where Me is a metal atom. The oxygen carrier 20 has a fixed volume or weight after being placed in the novel tandem fluidized bed reactor 10 of the present invention. During the operation of the present invention, the oxygen carrier 20 will be continuously circulated and reacted inside without additional addition.

C _n H _2m +(2n+m)Me _x O _y →nCO ₂ +mH ₂ O+(2n+m)Me _x O _y-1 (Equation 1)

The carbon dioxide and water produced during the combustion process are preferably discharged from the fuel reactor discharge port 135 at the top of the fuel reactor 13, and then a separation device may be added to separate the carbon dioxide and water to obtain high-purity carbon dioxide. The ash produced in the process is also discharged from the discharge port 135 of the fuel reactor.

Among them, the baffles 132 in four specific directions are arranged inside the tube of the fuel reactor 13. The first baffle 132 at the top can effectively prevent the oxygen carrier by reducing the upward vector force of the wind. 20 particles are sprayed and discharged out of the reactor from the fuel reactor discharge port 135. The bottom three baffles 132, which are arranged alternately from left to right and from left to right, have three functions. First, the forced fresh oxygen carrier 20 and The fuel 30 reacts through a fixed area to control and enhance the degree of reaction between the two; second, the flow direction of the oxygen carrier 20 particles and bubbles on the baffle 132 will form an annular flow to enhance the mixing effect between solid particles and gas, It can improve the heat and mass transfer efficiency; thirdly, the inclined angle of the baffle 132 has the effect of cutting bubbles, effectively preventing the phenomenon of lumpy fluidization in the fuel reactor 13 and providing stable operation.

In this embodiment, the feed pipe used in the first feed port 131 of the fuel reactor is preferably a pipe with a smaller diameter than that of the fuel reactor 13, so that the oxygen carrier 20 can be used in the present invention. In the series loop, the feed and return are smooth, and the fluidized gas in the fuel reactor 13 has a relatively large empty bed velocity in a relatively small tube, and the small tube will produce a turbulent fluidization state. When the feed and return inlets are When the small tubes are connected, the chance of contact with bubbles is high and the particles flow smoothly.

Then, the combusted oxygen carrier 20 flows into the closed loop device 12. The closed loop device 12 used in this embodiment serves to isolate the gas between the fuel reactor 13 and the air reactor 11 and serve as the carrier The oxygen carrier 20 is transported by the pipeline, and the oxygen carrier 20 is transported to the air reactor 11 through the passage of the closed loop device 12. At the same time, in order to maintain that the oxygen carrier 20 can continue to produce fluidization in the reactor of the present invention, it is preferable to pass a carrier gas, such as water vapor or nitrogen, into the closed loop device 12, 12'.

The air reactor 11 of the present invention is mainly used for the function of oxidizing the oxygen carrier 20, and may be a fluidized bed (or also called a fluidized bed), such as a turbulent fluidized bed. The method for oxidizing the oxygen carrier 20 is preferably to pass an oxygen-containing gas, such as air, from the bottom to the top of the air reactor 11 at a certain flow rate. A phenomenon similar to liquid flow occurs, which can be called a fluidization phenomenon, and the oxygen carrier 20 will react with and load the oxygen in the oxygen-containing gas, and then the oxygen carrier 20 loaded with oxygen will face along the direction of fluidization The top of the air reactor 11 moves and passes through the submerged riser 112. Since the oxygen-containing gas and the fuel 30 easily react and explode, the aforementioned closed loop device 12 can well isolate the oxygen-containing gas in the air reactor 11 and the fuel 30 in the fuel reactor 13. Reduce the risk of combustion and explosion caused by the reaction after the two contact. Wherein, the oxygen carrier 20 reacts in the air reactor 11 to oxidize the oxygen carrier 20 to support oxygen. The reaction equation is preferably the following formula (2), where Me is a metal atom.

Me _x O _y-1 +1/2O ₂ →Me _x O _y (Equation 2)

Wherein, the oxygen carrier 20 rides on the fluidized flow formed by the oxygen-containing gas to pass through the orifice 1111 of the orifice plate 111 in the air reactor 11, and is generated by the gas flowing through holes with smaller openings. The characteristic of higher speed achieves the bottom-to-up transportation function of the oxygen carrier 20 particles. Furthermore, the oxygen carrier 20 particles above the plane of the orifice plate 111 will contact the oxygen-containing gas in a circular flow manner. , Strengthen the function of retention and mixing, the oxygen carrier 20 particles can react with the oxygen in the oxygen-containing gas to oxidize back to the most oxidized metal oxide.

The function of the submerged riser 112 is to transport the oxygen carrier 20 particles, and the submerged connection method is designed to disperse the particle clusters, allowing some particles to stay in the area of the air reactor 11 before being entrapped by the subsequent airflow. Take away to avoid excessive concentration of particles in an outlet, thus forming a buffer function to improve the stability of particle flow in the system.

Through the communication of the communication device 14, the oxygen carrier 20 loaded with oxygen is brought to the fuel reactor 13 to continue combustion and reduction. The present invention is preferable to a set of closed loop devices, preferably the storage tank 134 is arranged above the closed loop device 12'. The storage tank 134 functions to provide a buffer space for storing particles in the system, which can effectively operate various parts of the system. The range of higher air volume.

In summary, the general equation of the chemical loop program adopted by the system of the present invention is as follows (3).

C _n H _2m +(n+m/2)O2→nCO ₂ +mH ₂ O (Equation 3)

The oxygen carrier 40 is burned into water and carbon dioxide in the fuel reactor 13 and reduced, and the reduced oxygen carrier 40 is then sent to the air reactor 11 by reacting with the oxygen-containing gas 40 to load oxygen and send it back to The fuel is burned in the reactor 13, and the so-called chemical loop reaction process is performed in this way.

"Validity Test"

In order to verify that the baffle 132 provided in the fuel reactor 13 of the present invention has the claimed effect, please refer to FIG. 5, which is a comparison of the solid fuel residence time. Under the same fuel reactor size, there is the baffle 132 and the design without the baffle 132, ^{compared with the same coal feed rate of 3.33x10 -4} kg/s, simulation for 20 seconds shows that the design coal discharge rate with the baffle 132 is 2.09x10 ^-4 kg/s, Without the baffle 132, it is 3.07x10 ^-4 kg/s, which confirms that the structural design of the baffle 132 can effectively enhance the solid fuel retention effect.

Please refer to Fig. 6, from the comparison result of the gas mixing effect, it can be seen that under the same fuel reactor size, whether there is the structure design of the baffle 132, simulation with the same tracking gas input from the side of the reactor, the baffle 132 can be found The gas weight fraction is relatively uniform, and the color blocks are uniform (Figure 6 right); while the gas weight fraction without baffle is uneven, and there are obviously different color blocks (Figure 6 left), so the baffle 132 can be confirmed The design can enhance the gas mixing effect in the present invention.

Please refer to Figures 7A and 7B. It can be seen from the comparison of the residence time of the oxygen carrier 20 to simulate the comparison in the same operation. Figure 7A shows the retention time data of the oxygen carrier 20 particles of the existing technology. The average residence time is 15.8 seconds. ; Figure 7B is the present invention, the average residence time is 26.1 seconds, an increase of about 60% of the residence time. The increased residence time of the oxygen carrier 20 means that the oxygen carrier 20 can react more completely and improve the efficiency of the overall reaction system of the present invention.

Please refer to Figure 8. From the comparison of the transportation stability of the oxygen carrier 20, it can be seen that the pressure point at the bottom of the reactor. The upper curve in the figure shows the existing tapered riser structure design. It is obvious that the pipe plunger is astringent. There will be frequent pressure surges, resulting in excessive reactor pressure and unsatisfactory transportation; the lower curve in the figure shows the structural design of the submerged riser 112 of the present invention, and its pressure trend changes relatively smoothly, and the submerged design can break the plunger The phenomenon occurs, which can effectively enhance the stability of its particle transportation.

The foregoing descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of rights claimed by the present invention. All other equivalent changes or modifications made without departing from the spirit disclosed by the present invention shall be included in the present invention. Within the scope of patent application.

10: New tandem fluidized bed reactor 11: Air reactor 111: Orifice plate 1111: Orifice 112: Submerged riser 113: Air reactor input 12, 12’: Closed loop device 13: Fuel reactor 131: The first feed port of the fuel reactor 132: Baffle 133: Cyclone 134: storage tank 135: Fuel reactor discharge port 14: Connecting device 20: oxygen carrier 30: Fuel

Figure 1 is a schematic diagram of a preferred embodiment of the present invention. Figure 2A is a partial perspective view of a preferred embodiment of the air reactor of the present invention. Figure 2B is a partial perspective view of a preferred embodiment of the fuel reactor of the present invention. Figure 3A is a partial perspective view of a preferred embodiment of the closed circuit device of the present invention. Fig. 3B is a partial perspective view of another preferred embodiment of the closed circuit device of the present invention. Fig. 4 is a schematic diagram of system operation in a preferred embodiment of the present invention. Figure 5 shows the comparison test results of solid fuel residence time. Figure 6 shows the comparison test results of gas mixing effects. Figure 7A shows the test results of the retention time of the oxygen carrier particles in the prior art. Fig. 7B is the test result of the retention time of the oxygen carrier of the present invention. Figure 8 shows the comparative test results of the transport stability of the oxygen carrier.

10: New tandem fluidized bed reactor

11: Air reactor

111: Orifice plate

1111: Orifice

112: Submerged riser

113: Air reactor input

12, 12’: Closed loop device

13: Fuel reactor

131: The first feed port of the fuel reactor

132: Baffle

133: Cyclone

134: storage tank

135: Fuel reactor discharge port

14: Connecting device

Claims (10)

A new type series fluidized bed reactor comprising: an air reactor, which is a hollow tube body arranged vertically, and at least one orifice plate is arranged radially inside the tube body, and the orifice plate is connected to the air reactor The inside of the tube has a conformal shape and size, and the plate is provided with an orifice; the bottom of the air reactor tube is provided with an air reactor input port, and the top is connected with a submerged riser. The bottom part of the riser pipe is sleeved inside the tube body of the air reactor, and the top of the submerged riser pipe is connected with a communicating device; a fuel reactor is a hollow pipe body arranged vertically, and the top of the immersed riser pipe is connected with the communicating device , And is provided with a fuel reactor discharge port, the bottom of which is provided with a fuel reactor feed port; and the air reactor is connected with the bottom of the fuel reactor by a closed loop device. For example, the new series fluidized bed reactor of the first item in the scope of patent application, wherein the tube wall inside the tube body of the fuel reactor contains several inclined and staggered baffles. For example, the new-type tandem fluidized bed reactor in the second item of the scope of patent application, wherein the baffle and the inner tube wall of the fuel reactor form an angle of 60 degrees. For example, the new-type tandem fluidized bed reactor of item 3 of the scope of patent application, wherein four baffles are arranged inside the tube body of the fuel reactor, and each baffle is staggered and inclined. For example, the new series fluidized bed reactor of the first item in the scope of patent application, wherein the other side of the top of the fuel reactor is connected with a cyclone separator and a storage tank in order from top to bottom, and the bottom of the storage tank There is another closed loop device to communicate with the bottom of the fuel reactor. For example, the new-type tandem fluidized bed reactor of item 2, 3, or 4 of the scope of patent application, wherein a second feed port of the fuel reactor is provided in the fuel reactor between the baffles. For example, the new series fluidized bed reactor of the first item in the scope of patent application, in which an oxygen carrier passes through an oxygen-containing gas and a fuel in the new series fluidized bed reactor as a chemical loop reaction process. For example, the new series fluidized bed reactor of the seventh item of the scope of patent application, wherein the oxygen carrier contains metal oxide particles, and the metal contains iron (Fe), nickel (Ni), copper (Cu), manganese (Mn) ), titanium (Ti) or cobalt (Co). For example, the new series fluidized bed reactor of the seventh item in the scope of patent application, wherein the oxygen-containing gas contains air or oxygen. For example, the new-type tandem fluidized bed reactor of item 7 of the scope of patent application, wherein the fuel is a gaseous or solid fuel.

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