Magnetic suspension ORC power generation system based on flue gas waste heat

Abstract

The utility model belongs to the technical field of waste heat power generation, and discloses a magnetic suspension ORC power generation system based on flue gas waste heat, which comprises a waste heat heating module and a power generation module, the waste heat heating module comprises a flue gas heat exchanger, an evaporator and a preheater, a cold fluid outlet of the flue gas heat exchanger is communicated with a heating medium inlet of the evaporator, and a cold fluid outlet of the evaporator is communicated with a heating medium outlet of the preheater. A heating medium outlet of the evaporator is communicated with a heat medium inlet of the preheater, a heat medium outlet of the preheater is communicated with a cold fluid inlet of the flue gas heat exchanger, and a cold medium outlet of the preheater is communicated with a heated liquid inlet of the evaporator; the low-temperature waste heat power generation technology is adopted, smoke waste heat can be fully recycled, effective cyclic utilization of energy is achieved, a large amount of electric energy can be generated, and the environment-friendly aims of saving energy and reducing carbon are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat power generation, in particular to a magnetic suspension ORC power generation system based on flue gas waste heat. Background Art

[0002] Currently in the glass industry, glass kilns use natural gas or coal to heat raw materials to melt the raw materials and then make them plastic. A large amount of flue gas will be generated in the process of melting the raw materials in the glass kiln. This part of the flue gas needs to undergo desulfurization, denitrification and dust removal processes before being discharged from the glass kiln. The treated flue gas is discharged into the atmosphere through an induced draft fan.

[0003] Generally speaking, the heat energy distribution inside the glass furnace is: 40-50% is absorbed by the glass liquid, 20-25% is lost through heat dissipation on the furnace surface, and the remaining 30% is lost in smoke exhaust. It can be seen that the flue gas carries a huge amount of heat energy. If this 30% of heat energy cannot be recycled but is directly discharged into the atmosphere, it will not only cause energy waste, but also pollute the environment. Utility Model Content

[0004] The main technical problem to be solved by the utility model is to provide a magnetic levitation ORC power generation system based on flue gas waste heat, which adopts low-temperature waste heat power generation technology, can not only fully reuse the flue gas waste heat and realize the effective recycling of energy, but also generate a large amount of electricity, which helps to achieve the environmental protection goals of energy saving and carbon reduction.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A magnetic levitation ORC power generation system based on flue gas waste heat comprises a waste heat heating module and a power generation module, wherein the waste heat heating module comprises a flue gas heat exchanger, an evaporator and a preheater, wherein the cold fluid outlet of the flue gas heat exchanger is connected to the heating medium inlet of the evaporator, the heating medium outlet of the evaporator is connected to the heat medium inlet of the preheater, the heat medium outlet of the preheater is connected to the cold fluid inlet of the flue gas heat exchanger, and the cold medium outlet of the preheater is connected to the heated liquid inlet of the evaporator.

[0007] The following is a further optimization of the above technical solution by the utility model:

[0008] A hot water pump is arranged between the preheater and the flue gas heat exchanger, the inlet of the hot water pump is connected to the hot medium outlet of the preheater, and the outlet of the hot water pump is connected to the cold fluid inlet of the flue gas heat exchanger.

[0009] Further optimization: the power generation module includes a turbine generator and a condenser, the heated liquid outlet of the evaporator is connected to the fluid inlet of the turbine generator, the fluid outlet of the turbine generator is connected to the hot medium inlet of the condenser, and the condensate outlet of the condenser is connected to the cold medium inlet of the preheater.

[0010] Further optimization: a working fluid pump is arranged between the condenser and the preheater, the inlet of the working fluid pump is connected to the condensate outlet of the condenser, and the outlet of the working fluid pump is connected to the cold medium inlet of the preheater.

[0011] Further optimization: the cooling medium inlet of the condenser is connected to a cooling circulation pump.

[0012] The utility model adopts the above technical solution and has the following beneficial effects:

[0013] The utility model adopts the above technical solution, which is ingenious in conception and reasonable in structure. A flue gas heat exchanger is added to the exhaust duct of the glass kiln, and the flue gas heat exchanger is used to transfer the heat in the flue gas to the organic working fluid, which is used to drive the turbine generator, thereby finally achieving the purpose of power generation.

[0014] Therefore, a large amount of electricity can be generated by making full use of the waste heat from the flue gas produced by combustion in the glass kiln. The waste heat power generation method reduces the glass kiln's dependence on external electricity, thereby reducing the factory's energy procurement costs.

[0015] Moreover, by recycling low-temperature waste heat that would otherwise be wasted and converting it into electrical energy, the emission of greenhouse gases and other pollutants is reduced, thereby effectively reducing pollution to the atmosphere and helping glass companies achieve the environmental protection goals of energy conservation and carbon reduction.

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the utility model;

[0019] Figure 2 This is a waste heat power generation flow chart of an embodiment of the utility model.

[0020] In the figure: 1-waste heat heating module; 11-flue gas heat exchanger; 12-evaporator; 13-preheater; 14-hot water pump; 2-power generation module; 21-turbine power generation integrated machine; 22-condenser; 23-working fluid pump; 24-cooling circulation pump. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1 As shown, a magnetic levitation ORC power generation system based on flue gas waste heat includes a waste heat heating module 1 and a power generation module 2. The waste heat heating module 1 includes a flue gas heat exchanger 11, an evaporator 12 and a preheater 13. The cold fluid outlet of the flue gas heat exchanger 11 is connected to the heating medium inlet of the evaporator 12, the heating medium outlet of the evaporator 12 is connected to the hot medium inlet of the preheater 13, the hot medium outlet of the preheater 13 is connected to the cold fluid inlet of the flue gas heat exchanger 11, and the cold medium outlet of the preheater 13 is connected to the heated liquid inlet of the evaporator 12.

[0023] In this embodiment, after the flue gas generated in the glass kiln completes the processes of desulfurization and dust removal, it enters the flue gas heat exchanger 11 through the hot fluid inlet of the flue gas heat exchanger 11 to heat the cold fluid. The flue gas that has been greatly cooled after heating leaves the flue gas heat exchanger 11 through the hot fluid outlet of the flue gas heat exchanger 11, and continues to enter the exhaust duct through the induced draft fan, and is finally discharged into the atmosphere.

[0024] In this embodiment, the magnetic levitation ORC power generation system is based on the organic Rankine cycle (ORC) technology, utilizes medium and low temperature waste heat (100-500°C), and uses low-boiling point organic working fluid instead of water vapor for circulation.

[0025] A hot water pump 14 is provided between the preheater 13 and the flue gas heat exchanger 11 , the inlet of the hot water pump 14 is connected to the hot medium outlet of the preheater 13 , and the outlet of the hot water pump 14 is connected to the cold fluid inlet of the flue gas heat exchanger 11 .

[0026] The power generation module 2 includes a turbine generator integrated machine 21 and a condenser 22. The heated liquid outlet of the evaporator 12 is connected to the fluid inlet of the turbine generator integrated machine 21, the fluid outlet of the turbine generator integrated machine 21 is connected to the hot medium inlet of the condenser 22, and the condensate outlet of the condenser 22 is connected to the cold medium inlet of the preheater 13.

[0027] In this embodiment, the integrated turbine generator 21 includes a turbine and a generator directly connected to the turbine. The organic working fluid steam expands and performs work in the turbine to drive the turbine to rotate, and the generator converts the mechanical energy generated by the turbine into electrical energy.

[0028] In this embodiment, magnetic levitation technology is applied to the turbine generator integrated machine 21. The magnetic levitation technology enables the rotating parts of the generator to operate in a contactless state, reducing mechanical friction and energy loss, and significantly improving the overall energy efficiency of the system.

[0029] The use of magnetic levitation technology enables waste heat to be converted into electrical energy more efficiently, increasing the energy recovery rate.

[0030] Therefore, the magnetic levitation ORC power generation system is particularly suitable for low-temperature waste heat recovery power generation in scenarios such as industrial waste heat, geothermal energy, and solar energy.

[0031] A working fluid pump 23 is provided between the condenser 22 and the preheater 13 , the inlet of the working fluid pump 23 is connected to the condensate outlet of the condenser 22 , and the outlet of the working fluid pump 23 is connected to the cold medium inlet of the preheater 13 .

[0032] In this embodiment, the technology of using waste heat to generate electricity greatly reduces the dependence on external electric energy, thereby reducing the energy procurement cost of the factory.

[0033] At the same time, the magnetic levitation generator has relatively low maintenance costs due to reduced friction and wear, further saving long-term operating costs.

[0034] Moreover, by recycling low-temperature waste heat that would otherwise be wasted and converting it into electrical energy, it reduces emissions of greenhouse gases and other pollutants, helps glass companies achieve their environmental goals of energy conservation and carbon reduction, and responds to the challenges of global climate change.

[0035] In short, the use of low-temperature waste heat power generation technology not only realizes the effective recycling of energy, but also promotes a win-win situation in economic and environmental benefits of production.

[0036] The cooling medium inlet of the condenser 22 is connected to a cooling circulation pump 24 .

[0037] The process of recycling flue gas using the waste heat heating module 1 is as follows:

[0038] The first step is waste heat collection: recovering medium and low temperature waste heat from the flue gas or cooling stage in the glass production process (the temperature of this part of waste heat is usually between 200-500℃, which is a low-grade heat source).

[0039] The second step is heat exchange: the flue gas enters the flue gas heat exchanger 11, heats the cold fluid in the flue gas heat exchanger 11, and the heated cold fluid forms steam or hot water.

[0040] The third step is heat transfer: steam or hot water enters the evaporator 12 to heat the organic working fluid in the evaporator 12, and the heat in the flue gas is transferred to the organic working fluid, and the liquid organic working fluid is converted into organic working fluid steam, ready to drive the turbine generator 21.

[0041] The fourth step is to reuse the waste heat: the steam or hot water cooled by heat transfer in the evaporator 12 enters the preheater 13, and the heat energy contained in the steam or hot water is reused for the second time.

[0042] Step 5: Recycling: After fully utilizing the waste heat, the steam or hot water returns to the flue gas heat exchanger 11 to form a closed-loop recycling.

[0043] The process of generating electricity using the power generation module 2 is as follows:

[0044] In the first step, the organic working fluid steam leaves the evaporator 12 and enters the turbine generator 21. The organic working fluid steam enters the turbine generator 21, converts mechanical energy into electrical energy, and generates electricity.

[0045] In the second step, the organic working medium vapor after doing work enters the condenser 22 and is condensed back into liquid organic working medium through air or water.

[0046] In the third step, the organic working medium that has completed the cycle is pumped back into the evaporator 12 to form a closed cycle.

[0047] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetic levitation ORC power generation system based on flue gas waste heat, characterized in that: The invention comprises a waste heat heating module (1) and a power generation module (2); the waste heat heating module (1) comprises a flue gas heat exchanger (11), an evaporator (12) and a preheater (13); a cold fluid outlet of the flue gas heat exchanger (11) is connected to a heating medium inlet of the evaporator (12); a heating medium outlet of the evaporator (12) is connected to a hot medium inlet of the preheater (13); a hot medium outlet of the preheater (13) is connected to a cold fluid inlet of the flue gas heat exchanger (11); and a cold medium outlet of the preheater (13) is connected to a heated liquid inlet of the evaporator (12).

2. The magnetic levitation ORC power generation system based on flue gas waste heat according to claim 1 is characterized in that: A hot water pump (14) is provided between the preheater (13) and the flue gas heat exchanger (11); an inlet of the hot water pump (14) is connected to a hot medium outlet of the preheater (13); and an outlet of the hot water pump (14) is connected to a cold fluid inlet of the flue gas heat exchanger (11).

3. The magnetic levitation ORC power generation system based on flue gas waste heat according to claim 2 is characterized in that: The power generation module (2) comprises a turbine-generator integrated machine (21) and a condenser (22); the heated liquid outlet of the evaporator (12) is connected to the fluid inlet of the turbine-generator integrated machine (21); the fluid outlet of the turbine-generator integrated machine (21) is connected to the hot medium inlet of the condenser (22); and the condensate outlet of the condenser (22) is connected to the cold medium inlet of the preheater (13).

4. The magnetic levitation ORC power generation system based on flue gas waste heat according to claim 3 is characterized in that: A working fluid pump (23) is provided between the condenser (22) and the preheater (13); an inlet of the working fluid pump (23) is connected to a condensate outlet of the condenser (22); and an outlet of the working fluid pump (23) is connected to a cold medium inlet of the preheater (13).

5. The magnetic levitation ORC power generation system based on flue gas waste heat according to claim 4 is characterized in that: The cooling medium inlet of the condenser (22) is connected to a cooling circulation pump (24).

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