Thermal chemical reactor integrated with annular heat exchange channel and Rankine cycle power generation system

Abstract

The invention discloses a thermochemical reactor of an integrated annular heat exchange channel and a Rankine cycle power generation system, and relates to the technical field of heat storage, the thermochemical reactor of the integrated annular heat exchange channel comprises a heat storage device and a heat release device, and the heat storage device and the heat release device are the same in structure and each comprise a shell; the reaction beds are mounted in the shell, are arranged at intervals and are used for filling reactants; the Rankine cycle power generation system comprises a water vapor Rankine cycle module and a thermal chemical reactor of a heat storage type integrated annular heat exchange channel. The water vapor Rankine cycle module comprises a cycle working medium evaporation device, an expansion machine, a second condenser and a working medium pump. According to the thermochemical reactor integrated with the annular heat exchange channel, heat storage and release equipment can effectively balance heat storage and release power improvement, heat density loss reduction, temperature uniformity improvement and cost control, meanwhile, a Rankine cycle power generation system can be maintained near the design working condition, and continuous and efficient operation is achieved.

Description

Technical Field

[0001] The present invention relates to the field of heat storage technology, and in particular to a thermochemical reactor with integrated annular heat exchange channels and a Rankine cycle power generation system. Background Art

[0002] In the industrial production process, a large amount of energy input into the system is not fully utilized, resulting in a large amount of heat being lost to the atmosphere in the form of waste heat. Efficient recovery of this waste heat can not only significantly improve energy utilization, but also has important significance for ensuring energy security and reducing environmental pollution. Medium and high temperature industrial waste heat recovery technology has been widely used in my country's steel, cement and metallurgical industries, but the sources of these medium and high temperature industrial waste heat are volatile and intermittent, making it difficult to achieve efficient utilization. This causes the system to operate near the design conditions, reducing overall energy efficiency.

[0003] Existing calcium-based thermochemical heat storage has the characteristics of high energy storage density, long energy storage time and extremely small heat loss, and the entire reaction process is non-toxic and harmless, which further enhances its attractiveness as a heat storage material. However, the design optimization of existing calcium-based thermochemical reaction devices often fails to fully consider the comprehensive balance between improving heat storage and heat release power, reducing heat density loss, improving temperature uniformity and controlling production costs. A single optimization direction may lead to a reduction in the overall energy efficiency, cycle performance and economic feasibility of the system, limiting the widespread adoption of these technologies in practical applications. Summary of the invention

[0004] The purpose of the present invention is to provide a thermochemical reactor with an integrated annular heat exchange channel and a Rankine cycle power generation system to solve the problem of volatility and intermittency of waste heat sources in industrial waste heat recovery technology, and the problem that the design optimization of existing calcium-based thermochemical reaction devices cannot achieve a better balance between improving heat storage and heat release power, reducing heat density loss, improving temperature uniformity and controlling production costs.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a thermochemical reactor with an integrated annular heat exchange channel, comprising a heat storage device and a heat release device, wherein the heat storage device and the heat release device have the same structure and both comprise an outer shell, and a plurality of reaction beds for filling reactants installed in the outer shell and arranged at intervals, wherein the plurality of reaction beds are nested in sequence from the outside to the inside, and an annular heat exchange channel is provided between each adjacent two reaction beds, and the plurality of reaction beds are divided into a circular reaction bed and a plurality of annular reaction beds, wherein the circular reaction bed is located in the innermost layer, and a filling port and a discharge port are provided on the outer shell, and a filter screen is installed in the outer shell at a position corresponding to the upper part of the reaction bed; an industrial waste heat inlet connected to each of the annular heat exchange channels and a water vapor outlet connected to each of the reaction beds are respectively provided on both sides of the upper end of the outer shell of the heat storage device, an industrial waste heat outlet connected to each of the annular heat exchange channels is provided on one side of the lower end of the outer shell of the heat storage device, a water vapor inlet connected to each of the reaction beds and a heat transfer fluid inlet connected to each of the annular heat exchange channels are respectively provided on both sides of the upper end of the outer shell of the heat release device, and a heat transfer fluid outlet connected to each of the annular heat exchange channels is provided on one side of the lower end of the outer shell of the heat release device.

[0007] Preferably, there are three reaction beds and three annular heat exchange channels, and the reaction beds and the annular heat exchange channels are arranged alternately in sequence. From the inside to the outside, the outer diameter of each annular heat exchange channel increases linearly, and the outer diameter ratio of each annular heat exchange channel is 1:2.2:3.4.

[0008] Preferably, the pore size of the filter is smaller than the particle size of the reactants in the reaction bed, and the filter is connected to the upper end of the reaction bed by bolts, flanges or clamps; the lower end of each reaction bed is blocked by a closed baffle, and the closed baffle is detachably connected to the reaction bed.

[0009] Preferably, the pore size of the filter is 4 microns.

[0010] Preferably, the industrial waste heat inlet, the industrial waste heat outlet, the heat transfer fluid inlet and the heat transfer fluid outlet are all connected with heat transfer fluid pipelines, and the heat transfer fluid pipelines can be connected with the corresponding annular heat exchange channels; the heat transfer fluid pipelines and the corresponding annular heat exchange channels are integrally cast.

[0011] Preferably, a plurality of baffles are installed in each of the annular heat exchange channels, and the plurality of baffles are staggered along the axial direction of the annular heat exchange channel and are evenly arranged along the radial direction of the annular heat exchange channel.

[0012] Preferably, the shell includes an upper shell, an intermediate shell and a lower shell, the upper shell can be detachably connected to the upper end of the intermediate shell, the lower shell can be detachably connected to the lower end of the intermediate shell, and the filling port and the discharge port are respectively opened on the upper shell and the lower shell, the industrial waste heat inlet, the water vapor outlet, the water vapor inlet and the heat transfer fluid inlet are all opened at the upper end of the corresponding intermediate shell, and the industrial waste heat outlet and the heat transfer fluid outlet are both opened at the lower end of the intermediate shell; the upper shell and the intermediate shell, as well as the lower shell and the intermediate shell are connected by flanges, threads or bolts.

[0013] Preferably, the lower shell is filled with heat insulating material.

[0014] The present invention also provides a Rankine cycle power generation system, comprising a water vapor Rankine cycle module and a thermochemical reactor with an integrated annular heat exchange channel as described in any one of the above technical solutions, wherein the water vapor outlet is connected to the inlet of a first condenser, the outlet of the first condenser is connected to the inlet of a water storage tank, the outlet of the water storage tank is connected to the inlet of an evaporator, and the outlet of the evaporator is connected to the water vapor inlet; the filling port of the heat release device is connected to the outlet of a CaO storage tank, and the inlet of the CaO storage tank is connected to the discharge port of the heat storage device; the filling port of the heat storage device is connected to the outlet of a Ca(OH)2 storage tank, and the inlet of the Ca(OH)2 storage tank is connected to the discharge port of the heat release device; the heat transfer fluid outlet is connected to the inlet of the water vapor Rankine cycle module, and the outlet of the water vapor Rankine cycle module is connected to the heat transfer fluid inlet.

[0015] Preferably, the water vapor Rankine cycle module includes a circulating working fluid evaporation device, an expander, a second condenser and a working fluid pump, the first inlet of the circulating working fluid evaporation device is connected to the heat transfer fluid outlet, the first outlet of the circulating working fluid evaporation device is connected to the heat transfer fluid inlet, the second outlet of the circulating working fluid evaporation device is connected to the inlet of the expander, the outlet of the expander is connected to the inlet of the second condenser, the outlet of the second condenser is connected to the inlet of the working fluid pump, and the outlet of the working fluid pump is connected to the second inlet of the circulating working fluid evaporation device.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The thermochemical reactor with integrated annular heat exchange channel provided by the present invention includes a heat storage device and a heat release device. The heat storage device and the heat release device have the same structure and both include a shell, and a plurality of reaction beds for filling reactants installed in the shell and arranged at intervals. The plurality of reaction beds are arranged in sequence from the outside to the inside, and an annular heat exchange channel is arranged between each two adjacent reaction beds. The layout of the reaction beds and the heat exchange channels arranged alternately in sequence effectively alleviates the problem of insufficient heat storage and heat release power caused by the sluggish reaction kinetics in the traditional reactor, and the temperature consistency in the reaction bed is ensured by optimizing the heat source distribution of the heat transfer fluid. Moreover, this design not only improves the overall efficiency and cycle performance of the chemical reaction. At the same time, the alternating arrangement of the annular reaction bed and the annular heat exchange channel provides the market with a clear competitive advantage in terms of reducing manufacturing and design costs, and provides a solution that is both efficient and economical for thermochemical heat storage technology.

[0018] The Rankine cycle power generation system provided by the present invention achieves a stable supply of industrial waste heat to maintain efficient operation of the system near the designed operating conditions. At the same time, the heat storage and heat release process of the thermochemical reaction is used to store and heat the industrial waste heat, thereby increasing the lower limit of the temperature of the usable industrial waste heat and significantly improving the utilization rate of medium and high temperature industrial waste heat. This design not only optimizes the energy recovery process, but also enhances the energy utilization efficiency and economy of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic structural diagram of a thermochemical reactor with an integrated annular heat exchange channel in Example 1;

[0021] Figure 2 It is a structural schematic diagram of the heat storage device in Example 1;

[0022] Figure 3 It is a structural schematic diagram of the heat release device in Example 1;

[0023] Figure 4 It is a cross-sectional schematic diagram of the heat storage device / heat release device in Example 1;

[0024] Figure 5 Schematic diagram of the relative position of the filter screen and the annular heat exchange channel in Example 1;

[0025] Figure 6Schematic diagram of the relative positions of the closed baffle plate and the annular heat exchange channel in Example 1;

[0026] Figure 7 Schematic diagram of the distribution position of baffles in the heat storage device in Example 1;

[0027] Figure 8 This is a schematic diagram of the distribution position of the baffles in the heat release device in Example 1;

[0028] Fig. 9 It is a structural schematic diagram of the Rankine cycle power generation system in Example 2;

[0029] In the figure: 1-intermediate shell, 2-upper shell, 3-lower shell, 4-filling port, 5-discharge port, 6-annular heat exchange channel, 7-reaction bed, 8-filter screen, 9-closed baffle, 10-mass flow controller, 11-heat transfer fluid pipeline, 12-industrial waste heat inlet, 13-industrial waste heat outlet, 14-water vapor outlet, 15-water vapor inlet, 16-heat transfer fluid inlet, 17-heat transfer fluid outlet, 18-baffle, 19-Ca(OH)2 storage tank, 20-first condenser, 21-water storage tank, 22-evaporator, 23-CaO storage tank, 24-circulating working fluid evaporation device, 25-expander, 26-second condenser, 27-working fluid pump. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The purpose of the present invention is to provide a thermochemical reactor and a Rankine cycle power generation system with an integrated annular heat exchange channel to solve the problems existing in the prior art and to strike an effective balance between improving heat storage and heat release power, reducing heat density loss, improving temperature uniformity and controlling costs.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Embodiment 1

[0034] like Figure 1-Figure 8As shown, this embodiment provides a thermochemical reactor with an integrated annular heat exchange channel, including a heat storage device and a heat release device. The heat storage device and the heat release device have the same structure and both include a shell, and a plurality of reaction beds 7 for filling reactants installed in the shell and arranged at intervals. The plurality of reaction beds 7 are sequentially sleeved from the outside to the inside, and an annular heat exchange channel 6 is provided between each two adjacent reaction beds 7. The plurality of reaction beds 7 are divided into a circular reaction bed and a plurality of annular reaction beds, and the circular reaction bed is located in the innermost layer. The layout of the reaction bed 7 and the annular heat exchange channel 6 being sequentially sleeved not only effectively alleviates the traditional The problem of insufficient heat storage and heat release power caused by the slow reaction kinetics in the reactor is solved by optimizing the heat source distribution of the heat transfer fluid to ensure the temperature consistency in the reaction bed 7. Moreover, this design not only improves the overall efficiency and cycle performance of the chemical reaction, but also significantly extends the service life of the equipment. At the same time, the alternating arrangement of the reaction bed 7 and the annular heat exchange channel 6 provides a clear competitive advantage for the market while reducing the manufacturing and design costs, and provides a highly efficient and economical solution for thermochemical heat storage technology. At the same time, a filling port 4 and a discharge port 5 are provided at the upper end of the shell, and the outer A filter screen 8 is installed at a position above the reaction bed 7 in the shell to separate the reaction gas from the reactant; an industrial waste heat inlet 12 connected to each annular heat exchange channel 6 and a water vapor outlet 14 connected to each reaction bed 7 are respectively provided on both sides of the upper end of the shell of the heat storage device. Industrial waste heat is introduced into the heat storage device through the industrial waste heat inlet 12, so that the reactant in the heat storage device exchanges heat with the industrial waste heat, and the water vapor generated by the reaction in the heat storage device is discharged through the water vapor outlet 14. An industrial waste heat outlet 13 connected to each annular heat exchange channel 6 is provided on one side of the lower end of the shell of the heat storage device. The waste heat outlet 13 discharges the gas after heat exchange in the heat storage device. The two sides of the upper end of the shell of the heat release device are respectively provided with a water vapor inlet 15 connected to each reaction bed 7 and a heat transfer fluid inlet 16 connected to each annular heat exchange channel 6. Water vapor is introduced into the heat release device through the water vapor inlet 15, and heat transfer fluid is introduced into the heat release device through the heat transfer fluid inlet 16. A heat transfer fluid outlet 17 connected to each annular heat exchange channel 6 is provided on one side of the lower end of the shell of the heat release device. The high-temperature heat transfer fluid after heat exchange in the heat release device is discharged through the heat transfer fluid outlet 17 to be transported to the subsequent thermal energy application scene. This embodiment significantly improves the heat transfer performance in the heat storage and heat release process through the innovative design of the thermochemical reactor with integrated annular heat exchange channel.

[0035] Specifically, there are three reaction beds 7 and three annular heat exchange channels 6, and the reaction beds 7 and the annular heat exchange channels 6 are arranged alternately in sequence. From the inside to the outside, the outer diameter of each annular heat exchange channel 6 increases linearly, and the outer diameter ratio of each annular heat exchange channel 6 is 1:2.2:3.4, that is, the distance between the outer diameter of each annular heat exchange channel 6 and the axis of the reaction bed 7 is L1:L2:L3=1:2.2:3.4. The uniform layout is adopted, which helps to achieve more uniform temperature distribution and higher heat exchange efficiency inside the heat storage device and the heat release device. The design of the reaction bed 7 helps to achieve efficient heat exchange between the reactants and the heat exchange fluid, thereby improving the heat storage and heat release power.

[0036] The pore size of the filter screen 8 is smaller than the particle size of the reactants in the reaction bed 7, and the filter screen 8 is connected to the upper end of the reaction bed 7. Those skilled in the art can select a suitable connection method according to the reaction conditions, such as threaded connection, flange connection or clamping connection; the lower end of each reaction bed 7 is blocked by a closed baffle 9, and the closed baffle 9 and the reaction bed 7 can be detachably connected.

[0037] The pore size of the filter 8 is 4 microns, and the particle size of the reactants is generally not less than 5 microns, so as to separate the reactant gas from the reactants and prevent the reactant particles from being blown out of the reaction bed 7.

[0038] The industrial waste heat inlet 12, the industrial waste heat outlet 13, the heat transfer fluid inlet 16 and the heat transfer fluid outlet 17 are all connected with a heat transfer fluid pipeline 11, and the heat transfer fluid pipeline 11 can be connected with the corresponding annular heat exchange channels 6; the heat transfer fluid pipeline 11 and the corresponding annular heat exchange channels 6 are integrally cast, which can realize the separation between the reaction gas and the heat transfer fluid. At the same time, with the setting of the mass flow controller 10, the flow rate of the heat transfer fluid can be adjusted, thereby achieving more precise adjustment of the reaction process.

[0039] A plurality of baffles 18 are installed in each annular heat exchange channel 6. The plurality of baffles 18 are staggered along the axial direction of the annular heat exchange channel 6 and are evenly arranged along the radial direction of the annular heat exchange channel 6. Those skilled in the art can also adjust the size and arrangement position of the baffles 18 according to the changes in the structural parameters of the outer shell to optimize the heat exchange effect.

[0040] The shell includes an upper shell 2, an intermediate shell 1 and a lower shell 3. The upper shell 2 can be detachably connected to the upper end of the intermediate shell 1, and the lower shell 3 can be detachably connected to the lower end of the intermediate shell 1. The filling port 4 and the discharge port 5 are respectively opened on the upper shell 2 and the lower shell 3. The industrial waste heat inlet 12, the water vapor outlet 14, the water vapor inlet 15 and the heat transfer fluid inlet 16 are all opened at the upper end of the corresponding intermediate shell 1, and the industrial waste heat outlet 13 and the heat transfer fluid outlet 17 are both opened at the lower end of the intermediate shell 1; the upper shell 2 and the intermediate shell 1, as well as the lower shell 3 and the intermediate shell 1 are connected by flanges, threads or bolts. According to the specific reaction conditions, the connection method can be adjusted automatically to adapt to different operating requirements.

[0041] The lower shell 3 is filled with a large amount of heat insulating material, and the heat insulating material is arranged away from the heat transfer fluid pipeline 11 , which can reduce heat loss on the one hand, and support the heat transfer fluid pipeline 11 on the other hand.

[0042] This embodiment not only significantly improves the reaction kinetics performance and solves the problems of slow reaction speed, low heat storage and heat release power in traditional equipment by designing uniformly distributed annular heat exchange channels 6 inside the reaction bed 7, but also effectively takes into account the heat density, temperature uniformity and manufacturing cost of the reactor.

[0043] The energy storage method of the thermochemical reactor with integrated annular heat exchange channel in this embodiment can realize efficient storage and release of heat, which specifically includes:

[0044] Heat storage stage: industrial waste gas carrying a large amount of heat flows in through the industrial waste heat inlet 12 of the heat storage equipment, is controlled by the mass flow controller 10, and then is evenly distributed to the three annular heat exchange channels 6 through the integrally cast heat transfer fluid pipeline 11; then, under the action of the carefully designed annular heat exchange channel 6 and the baffle 18, efficient heat exchange with the reaction bed 7 is achieved; in this process, the reactant Ca(OH)2 absorbs the heat transferred by the high-temperature industrial waste gas to reach the activation energy of its dehydration reaction, and then a dehydration chemical reaction occurs to generate water vapor and CaO; the generated CaO is retained in the reaction bed 7 as a storage medium for chemical energy, while the water vapor is discharged through the water vapor outlet 14 at the top and collected in a dedicated water storage tank 21, completing the conversion of thermal energy into chemical energy.

[0045] Heat release stage: the reaction gas water vapor flows into the heat release device from the water vapor inlet 15 of the heat release device, and then is injected into the reaction bed 7 through the filter 8 with a pore size of 4 microns; then the water vapor undergoes a hydration reaction with the reactant CaO in the reaction bed 7 to release a large amount of heat; the heat transfer fluid flows in from the heat transfer fluid inlet 16 of the heat release device, is controlled by the mass flow controller 10, and then is evenly distributed to each annular heat exchange channel 6 through the integrally cast heat transfer fluid pipeline 11; then, under the action of the carefully designed annular heat exchange channel 6 and the baffle 18, efficient heat exchange with the reaction bed 7 is achieved; then, the high-temperature heat transfer fluid carrying a large amount of chemical reaction heat is gathered at the heat transfer fluid outlet 17 at the bottom of the shell, and is transported to the required thermal energy application scenario to achieve efficient conversion of chemical energy into thermal energy.

[0046] Embodiment 2

[0047] like Fig. 9 As shown, this embodiment provides a Rankine cycle power generation system, including a water vapor Rankine cycle module and a thermochemical reactor with an integrated annular heat exchange channel in Embodiment 1, the water vapor outlet 14 is connected to the inlet of a first condenser 20, the outlet of the first condenser 20 is connected to the inlet of a water storage tank 21, the outlet of the water storage tank 21 is connected to the inlet of an evaporator 22, and the outlet of the evaporator 22 is connected to the water vapor inlet 15; the filling port 4 of the heat release device is connected to the outlet of a CaO storage tank 23, and the inlet of the CaO storage tank 23 is connected to the discharge port 5 of the heat storage device; the filling port 4 of the heat storage device is connected to the outlet of a Ca(OH)2 storage tank 19, and the inlet of the Ca(OH)2 storage tank 19 is connected to the discharge port 5 of the heat release device; the heat transfer fluid outlet 17 is connected to the inlet of the water vapor Rankine cycle module, and the outlet of the water vapor Rankine cycle module is connected to the heat transfer fluid inlet 16.

[0048] Specifically, the water vapor Rankine cycle module includes a circulating working fluid evaporation device 24, an expander 25, a second condenser 26 and a working fluid pump 27. The first inlet of the circulating working fluid evaporation device 24 is connected to the heat transfer fluid outlet 17, the first outlet of the circulating working fluid evaporation device 24 is connected to the heat transfer fluid inlet, the second outlet of the circulating working fluid evaporation device 24 is connected to the inlet of the expander 25, the outlet of the expander 25 is connected to the inlet of the second condenser 26, the outlet of the second condenser 26 is connected to the inlet of the working fluid pump 27, and the outlet of the working fluid pump 27 is connected to the second inlet of the circulating working fluid evaporation device 24.

[0049] Through the above-mentioned design, this embodiment can rely on thermochemical heat storage technology to achieve efficient storage and heating of low-temperature industrial waste heat, and can flexibly adjust the release of thermal energy according to actual power generation needs. It not only improves the utilization efficiency of medium and high temperature industrial waste heat, but also provides new possibilities for energy recovery and utilization. It has significant practical application value and broad market prospects.

[0050] This embodiment mainly consists of the following parts in terms of functional division:

[0051] (1) Industrial waste heat recovery

[0052] The industrial waste heat loop includes: industrial waste heat input pipeline, heat storage equipment and industrial waste heat output pipeline. Its main function is to achieve efficient storage of industrial waste heat through thermochemical heat storage technology.

[0053] (2) Heat storage and heat release

[0054] The heat storage and heat release part mainly includes: heat storage equipment, heat release equipment, Ca(OH)2 storage tank 19, CaO storage tank 23 and water storage tank 21. Its main function is to realize the conversion between thermal energy-chemical energy and chemical energy-thermal energy through heat storage equipment and heat release equipment.

[0055] (3) Steam Rankine cycle

[0056] The water vapor Rankine cycle part includes: a circulating working fluid evaporation device 24, an expander 25, a second condenser 26, a working fluid pump 27 and corresponding loop pipelines. Its main function is to drive the circulating working fluid to generate electricity through thermal energy, as well as to recover and transport the circulating working fluid.

[0057] The implementation method of the Rankine cycle power generation system in this embodiment specifically includes:

[0058] Heat storage process: waste gas carrying abundant heat continuously flows in from the industrial waste heat inlet 12, and is evenly distributed to each annular heat exchange channel 6 through the mass flow controller 10 and the integrally cast heat transfer fluid pipeline 11; the waste gas carrying abundant heat fully exchanges heat with the reaction bed 7 through the baffle 18; the reactant Ca(OH)2 in the heat storage device absorbs heat, meets the conditions for dehydration reaction, decomposes and produces water vapor and CaO; the water vapor flows out from the water vapor outlet 14 through the pressure difference, and is converted into water and stored in the water storage tank 21 through the first condenser 20; the CaO becomes a heat carrier and is retained in the reaction bed 7; when the reactants are basically reacted, the CaO is transported to the CaO storage tank 23; after sufficient heat exchange, the waste gas is discharged from the industrial waste heat outlet 13 through the pipeline.

[0059] Heat release process: CaO has been filled in the heat release device; the condensed water in the water storage tank 21 is converted into water vapor under the action of the evaporator 22, and enters the reaction bed 7 through the filter 8 with a pore size of 4 microns on the top of the reaction bed 7, and maintains an excess state; then the water vapor undergoes a hydration reaction with CaO, releasing a large amount of heat; the heat transfer fluid flows in from the heat transfer fluid inlet 16, and is evenly distributed to each annular heat exchange channel 6 through the action of the mass flow controller 10 and the integrally cast heat transfer fluid pipeline 11; then the heat transfer fluid passes through the baffle 18, and fully exchanges heat with the reaction bed 7, taking away a large amount of chemical reaction heat, and then passes through the pipeline, flows out from the heat transfer fluid outlet 17, and enters the evaporator 22 in the power cycle.

[0060] Power generation process: water vapor fully exchanges heat with the heat transfer fluid (generally heat transfer oil, Hytherm-600) in the circulating working fluid evaporator 24 and becomes gaseous, then enters the expander 25 to do work, driving the steam turbine to generate electricity. After doing work, the water vapor releases heat and condenses under the action of the second condenser 26. When there is a demand for power generation, it enters the circulating working fluid evaporator 24 through the action of the working fluid pump 27, absorbs heat to become steam, and expands to do work.

[0061] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A thermochemical reactor with an integrated annular heat exchange channel, characterized in that: The invention comprises a heat storage device and a heat release device, wherein the heat storage device and the heat release device have the same structure and both comprise a shell, and a plurality of reaction beds for filling reactants installed in the shell and arranged at intervals, wherein the plurality of reaction beds are nested in sequence from the outside to the inside, and an annular heat exchange channel is provided between each two adjacent reaction beds, and the plurality of reaction beds are divided into a circular reaction bed and a plurality of annular reaction beds, wherein the circular reaction bed is located in the innermost layer, and a filling port and a discharge port are provided on the shell, and a filter is installed in the shell at a position corresponding to the position above the reaction bed; an industrial waste heat inlet connected to each of the annular heat exchange channels and a water vapor outlet connected to each of the reaction beds are respectively provided on both sides of the upper end of the shell of the heat storage device, an industrial waste heat outlet connected to each of the annular heat exchange channels is provided on one side of the lower end of the shell of the heat storage device, a water vapor inlet connected to each of the reaction beds and a heat transfer fluid inlet connected to each of the annular heat exchange channels are respectively provided on both sides of the upper end of the shell of the heat release device, and a heat transfer fluid outlet connected to each of the annular heat exchange channels is provided on one side of the lower end of the shell of the heat release device.

2. The thermochemical reactor with integrated annular heat exchange channel according to claim 1, characterized in that: There are three reaction beds and three annular heat exchange channels, and the reaction beds and the annular heat exchange channels are arranged alternately in sequence. From the inside to the outside, the outer diameter of each annular heat exchange channel increases linearly, and the outer diameter ratio of each annular heat exchange channel is 1:2.2:3.

4.

3. The thermochemical reactor with integrated annular heat exchange channel according to claim 1, characterized in that: The pore size of the filter is smaller than the particle size of the reactants in the reaction bed, and the filter is connected to the upper end of the reaction bed by bolts, flanges or clamps; the lower end of each reaction bed is blocked by a closed baffle, and the closed baffle is detachably connected to the annular reaction bed.

4. The thermochemical reactor with integrated annular heat exchange channel according to claim 3, characterized in that: The pore size of the filter is 4 microns.

5. The thermochemical reactor with integrated annular heat exchange channel according to claim 1, characterized in that: The industrial waste heat inlet, the industrial waste heat outlet, the heat transfer fluid inlet and the heat transfer fluid outlet are all connected with heat transfer fluid pipelines, and the heat transfer fluid pipelines can be connected with the corresponding annular heat exchange channels; the heat transfer fluid pipelines and the corresponding annular heat exchange channels are integrally cast.

6. The thermochemical reactor with integrated annular heat exchange channel according to claim 1, characterized in that: A plurality of baffles are installed in each of the annular heat exchange channels. The baffles are staggered along the axial direction of the annular heat exchange channel and are evenly arranged along the radial direction of the annular heat exchange channel.

7. The thermochemical reactor with integrated annular heat exchange channel according to claim 1, characterized in that: The shell includes an upper shell, an intermediate shell and a lower shell, the upper shell is detachably connected to the upper end of the intermediate shell, the lower shell is detachably connected to the lower end of the intermediate shell, and the filling port and the discharge port are respectively opened on the upper shell and the lower shell, the industrial waste heat inlet, the water vapor outlet, the water vapor inlet and the heat transfer fluid inlet are all opened at the upper end of the corresponding intermediate shell, and the industrial waste heat outlet and the heat transfer fluid outlet are both opened at the lower end of the intermediate shell; the upper shell and the intermediate shell, as well as the lower shell and the intermediate shell are connected by flanges, threads or bolts.

8. The thermochemical reactor with integrated annular heat exchange channel according to claim 7, characterized in that: The lower shell is filled with heat insulation material.

9. A Rankine cycle power generation system, characterized in that: A thermochemical reactor comprising a water vapor Rankine cycle module and an integrated annular heat exchange channel according to any one of claims 1 to 8, wherein the water vapor outlet is connected to the inlet of a first condenser, the outlet of the first condenser is connected to the inlet of a water storage tank, the outlet of the water storage tank is connected to the inlet of an evaporator, and the outlet of the evaporator is connected to the water vapor inlet; the filling port of the heat release device is connected to the outlet of a CaO storage tank, and the inlet of the CaO storage tank is connected to the discharge port of the heat storage device; the filling port of the heat storage device is connected to the outlet of a Ca(OH)2 storage tank, and the inlet of the Ca(OH)2 storage tank is connected to the discharge port of the heat release device; the heat transfer fluid outlet is connected to the inlet of the water vapor Rankine cycle module, and the outlet of the water vapor Rankine cycle module is connected to the heat transfer fluid inlet.

10. The Rankine cycle power generation system according to claim 9, characterized in that: The water vapor Rankine cycle module includes a circulating working fluid evaporation device, an expander, a second condenser and a working fluid pump, wherein the first inlet of the circulating working fluid evaporation device is connected to the heat transfer fluid outlet, the first outlet of the circulating working fluid evaporation device is connected to the heat transfer fluid inlet, the second outlet of the circulating working fluid evaporation device is connected to the inlet of the expander, the outlet of the expander is connected to the inlet of the second condenser, the outlet of the second condenser is connected to the inlet of the working fluid pump, and the outlet of the working fluid pump is connected to the second inlet of the circulating working fluid evaporation device.

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