An orc generator for condensate waste heat recovery

Abstract

The utility model discloses a kind of ORC generators for condensate waste heat recovery, including rack, the inside fixed mounting of rack has condenser and working medium pump, the upper fixed mounting of rack has expander, steam turbine mechanism, evaporator and generator, the inside installation of expander has expander output shaft, the inside movable mounting of steam turbine mechanism has steam turbine output shaft, the input end fixed mounting of generator has generator input shaft;Shell, the inside movable mounting of shell has steam turbine, the both sides of steam turbine are installed with connecting bearing, the upper of shell is provided with input, the right side bolt mounting of shell has cover plate.The utility model is driven by steam turbine mechanism by setting, steam is injected to steam turbine mechanism inside to promote steam turbine rotation, and then steam turbine output shaft drives generator input shaft rotation, cooperate with expander to greatly improve the power generation of generator, while steam decompression, send into high pressure steam drum to provide heat for stripping column.

Description

Technical Field

[0001] This utility model relates to the field of ORC generator technology, specifically to an ORC generator for condensate waste heat recovery. Background Technology

[0002] The ORC generator, short for Organic Rankine Cycle generator, is a highly efficient technology that uses medium- and low-temperature heat sources (such as industrial waste heat, geothermal energy, solar energy, or biomass energy) to generate electricity. Its core principle is similar to that of a traditional steam turbine, but the key difference is that it uses a low-boiling-point organic working fluid (such as pentane or Freon substitutes) instead of water. This allows the ORC system to efficiently capture and convert heat energy at lower temperatures (usually between 80°C and 300°C) to drive a turbine to generate electricity. Therefore, it is particularly suitable for stripping urea production, where the ORC generator is typically used to generate electricity from the condensate of the steam after the stripping urea unit is in operation.

[0003] Since steam is used extensively in the stripping urea production process, 2.5MPa steam directly enters the high-pressure steam drum. After the steam drum is depressurized, it supplies heat to the stripping tower, resulting in energy loss during the depressurization process of the 2.5MPa steam, which increases product costs. At the same time, the condensate generated after the heat energy of the steam is utilized by depressurization at each stage enters the condensate tank. After being pressurized by the condensate pump, the condensate heat is carried away by circulating water through the heat exchanger, which wastes a lot of heat energy. To address this, we propose an ORC generator for condensate waste heat recovery. Utility Model Content

[0004] The purpose of this invention is to provide an ORC generator for condensate waste heat recovery, in order to solve the problems mentioned in the background art. In the stripping urea production process, a large amount of steam is used. The 2.5MPa steam directly enters the high-pressure steam drum, and after the steam drum is depressurized, it supplies heat to the stripping tower, resulting in energy loss during the depressurization process of the 2.5MPa steam, which increases the product cost. At the same time, the condensate generated after the heat energy of the steam is utilized by depressurization at each stage enters the condensate tank, is pressurized by the condensate pump, and then the heat of the condensate is carried away by circulating water in the heat exchanger, which wastes a lot of heat energy.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an ORC generator for condensate waste heat recovery, comprising:

[0006] The frame has a condenser and a working fluid pump fixedly installed inside it. An expander, a turbine mechanism, an evaporator, and a generator are fixedly installed on top of the frame. An expander output shaft is installed inside the expander. A turbine output shaft is movably installed inside the turbine mechanism. A generator input shaft is fixedly installed at the input end of the generator.

[0007] In a preferred embodiment of the ORC generator for condensate waste heat recovery according to this utility model, the expander output shaft is connected to the turbine output shaft flange, and the turbine output shaft is connected to the generator input shaft flange.

[0008] In a preferred embodiment of the ORC generator for condensate waste heat recovery according to this utility model, the evaporator is connected to the expander, the expander is connected to the condenser, the condenser is connected to the input end of the working fluid pump, and the output end of the working fluid pump is connected to the evaporator.

[0009] As a preferred embodiment of the ORC generator for condensate waste heat recovery according to this utility model, the turbine mechanism further includes:

[0010] The housing has a turbine movably installed inside it, with connecting bearings installed on both sides of the turbine. An inlet is provided on the top of the housing, and a cover plate is bolted to the right side of the housing. An outlet is provided on the right side of the cover plate.

[0011] In a preferred embodiment of the ORC generator for condensate waste heat recovery according to this utility model, the turbine output shaft is fixedly connected to the turbine, the turbine output shaft is movably connected to the housing through the connecting bearing, and the turbine output shaft is movably connected to the cover plate through the connecting bearing.

[0012] In a preferred embodiment of the ORC generator for condensate waste heat recovery according to this utility model, the input port is connected to the housing, and the output port is connected to the housing.

[0013] Compared with the prior art, this utility model provides an ORC generator for condensate waste heat recovery, which has the following beneficial effects:

[0014] This invention incorporates a turbine mechanism, which injects steam into the turbine to drive its rotation. This rotation, in turn, drives the generator input shaft via the turbine output shaft. In conjunction with the expander, this significantly increases the generator's power output. Simultaneously, it reduces the pressure of the steam and sends it to the high-pressure steam drum to heat the stripping tower. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the turbine mechanism of this utility model.

[0017] In the diagram: 1. Frame; 2. Condenser; 3. Expander; 4. Expander output shaft; 5. Turbine mechanism; 51. Turbine output shaft; 52. Turbine; 53. Casing; 54. Inlet; 55. Connecting bearing; 56. Cover plate; 57. Outlet; 6. Generator input shaft; 7. Evaporator; 8. Generator; 9. Working fluid pump. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 and Figure 2 An ORC generator for condensate waste heat recovery includes a frame 1. A condenser 2 and a working fluid pump 9 are fixedly installed inside the frame 1. An expander 3, a turbine mechanism 5, an evaporator 7, and a generator 8 are fixedly installed on the top of the frame 1. An expander output shaft 4 is installed inside the expander 3. A turbine output shaft 51 is movably installed inside the turbine mechanism 5. A generator input shaft 6 is fixedly installed at the input end of the generator 8.

[0020] In this implementation scheme: by setting up a turbine mechanism 5, steam is injected into the interior of the turbine mechanism 5 to drive the turbine 52 to rotate, and then the turbine output shaft 51 drives the generator input shaft 6 to rotate. In conjunction with the expander 3, the power generation of the generator 8 is greatly improved. At the same time, the steam pressure is reduced and sent to the high-pressure steam drum to supply heat to the stripping tower.

[0021] Furthermore:

[0022] In an optional embodiment, the expander output shaft 4 is flange-connected to the turbine output shaft 51, and the turbine output shaft 51 is flange-connected to the generator input shaft 6.

[0023] In this implementation plan, the above-mentioned technology enables the kinetic energy generated by the expander 3 and the turbine mechanism 5 to be transferred to the generator 8 for power generation.

[0024] Furthermore:

[0025] In an optional embodiment, the evaporator 7 is connected to the expander 3, the expander 3 is connected to the condenser 2, the condenser 2 is connected to the input end of the working fluid pump 9, and the output end of the working fluid pump 9 is connected to the evaporator 7.

[0026] In this implementation scheme, the working fluid is circulated between the evaporator 7, the expander 3, the condenser 2, and the working fluid pump 9 through the above-mentioned technology.

[0027] Furthermore:

[0028] In an optional embodiment, the turbine mechanism 5 further includes:

[0029] The housing 53 has a turbine 52 movably installed inside it. Connecting bearings 55 are installed on both sides of the turbine 52. An inlet 54 is provided on the top of the housing 53. A cover plate 56 is bolted to the right side of the housing 53. An outlet 57 is provided on the right side of the cover plate 56.

[0030] In this implementation plan, the pressure of steam can be converted into the power for generating electricity using the above-mentioned technology.

[0031] Furthermore:

[0032] In an optional embodiment, the turbine output shaft 51 is fixedly connected to the turbine 52, the turbine output shaft 51 is movably connected to the housing 53 via a connecting bearing 55, and the turbine output shaft 51 is movably connected to the cover plate 56 via a connecting bearing 55.

[0033] In this implementation plan: when the turbine 52 rotates, the kinetic energy can be transmitted to the generator 8 through the turbine output shaft 51 to generate electricity.

[0034] Furthermore:

[0035] In an optional embodiment, the input port 54 is connected to the housing 53, and the output port 57 is connected to the housing 53.

[0036] In this implementation plan: the steam inside the shell 53 is transported back to the high-pressure steam drum through the outlet 57 and pipeline using the above technology, and then depressurized to supply heat to the stripping tower.

[0037] Working principle: When using the ORC generator for condensate waste heat recovery, the steam generated during the operation of the stripping urea unit is first injected into the interior of the casing 53 through the pipe and inlet 54, driving the turbine 52 to rotate. This, in turn, drives the generator input shaft 6 to rotate through the turbine output shaft 51, causing the generator 8 to work and generate electricity. Then, the steam inside the casing 53 is transported back to the high-pressure steam drum through the outlet 57 and pipe. Next, the steam is depressurized and cooled after passing through the high-efficiency steam stepped pressure reduction system of the stripping urea unit to produce condensate. The condensate is then input into the evaporator 7. The heat in the condensate is used to heat the working fluid. The working fluid (such as chlorofluorocarbons, ammonia, etc.) absorbs heat from the heat source and vaporizes in the evaporator 7. Subsequently, it enters the expander 3 to do work, driving the turbine output shaft 51 to rotate through the expander output shaft 4, thus causing the generator 8 to work and generate electricity. After performing work, the working fluid is cooled and liquefied by condenser 2, and then pressurized by working fluid pump 9 and returned to evaporator 7 to form a cycle. The condenser 2, expander 3, evaporator 7, generator 8 and working fluid pump 9 are all existing technologies and will not be described in detail here. This is the working principle of the ORC generator for condensate waste heat recovery.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ORC generator for condensate waste heat recovery, characterized in that, include: A frame (1) is provided, inside which a condenser (2) and a working fluid pump (9) are fixedly installed. An expander (3), a turbine mechanism (5), an evaporator (7) and a generator (8) are fixedly installed on the top of the frame (1). An expander output shaft (4) is installed inside the expander (3). A turbine output shaft (51) is movably installed inside the turbine mechanism (5). A generator input shaft (6) is fixedly installed at the input end of the generator (8).

2. The ORC generator for condensate waste heat recovery according to claim 1, characterized in that, The expander output shaft (4) is flange-connected to the turbine output shaft (51), and the turbine output shaft (51) is flange-connected to the generator input shaft (6).

3. The ORC generator for condensate waste heat recovery according to claim 1, characterized in that, The evaporator (7) is connected to the expander (3), the expander (3) is connected to the condenser (2), the condenser (2) is connected to the input end of the working fluid pump (9), and the output end of the working fluid pump (9) is connected to the evaporator (7).

4. An ORC generator for condensate waste heat recovery according to claim 1, characterized in that, The turbine mechanism (5) also includes: A housing (53) is provided, inside which a steam turbine (52) is movably installed. Connecting bearings (55) are installed on both sides of the steam turbine (52). An inlet (54) is provided on the top of the housing (53). A cover plate (56) is bolted to the right side of the housing (53). An outlet (57) is provided on the right side of the cover plate (56).

5. An ORC generator for condensate waste heat recovery according to claim 4, characterized in that, The turbine output shaft (51) is fixedly connected to the turbine (52), the turbine output shaft (51) is movably connected to the housing (53) through the connecting bearing (55), and the turbine output shaft (51) is movably connected to the cover plate (56) through the connecting bearing (55).

6. An ORC generator for condensate waste heat recovery according to claim 4, characterized in that, The input port (54) is connected to the housing (53), and the output port (57) is connected to the housing (53).

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