Tandem type magnetic suspension waste heat generator set

Abstract

The utility model discloses a tandem type magnetic suspension waste heat generator set which comprises a heat source input system, a power generation system and a working medium circulation system which are connected in sequence. The heat source input system comprises a high-adjustment water inlet, an evaporator and a preheater, the power generation system comprises a first-stage magnetic suspension orc all-in-one machine and a second-stage magnetic suspension orc all-in-one machine, an air inlet of the first-stage magnetic suspension orc all-in-one machine is connected with a working medium outlet of the evaporator, and an exhaust port of the first-stage magnetic suspension orc all-in-one machine is connected with an air inlet of the second-stage magnetic suspension orc all-in-one machine through an exhaust pipe; the working medium circulating system comprises a condenser and a circulating pump, and the working medium after acting is discharged from the two-stage magnetic suspension orc all-in-one machine, then enters the condenser and is conveyed to the preheater through the circulating pump to be preheated. According to the utility model, through the tandem power generation structure and the efficient heat exchange component, waste heat resources are fully utilized, and compared with the traditional waste heat power generation technology, the power generation efficiency is obviously improved, the energy consumption cost of enterprises is effectively reduced, remote intelligent control can be realized, the operation is convenient and fast, and the labor cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat power generation technical field especially relates to a series connection type magnetic suspension waste heat power generating set. BACKGROUND

[0002] The traditional ORC power generating set usually adopts hot water circulation and organic Rankine cycle to carry out heat exchange in the heat exchanger, so that the organic working medium absorbs heat and evaporates, and organic steam is obtained to drive the ORC power generation, and the hot water forms low-temperature and low-pressure condensed water after heat exchange in the heat exchanger and is pumped to other process sections by a water pump, and the organic steam enters the condenser after driving the ORC power generation, and is transported to the heat exchanger by the working medium pump, so as to form the organic Rankine cycle.

[0003] At present, the process section adopts the traditional ORC unit, and the core components are selected from an evaporator, a centripetal turbine, a sliding bearing, a dry gas seal, a gear box and a generator oil station, but the dry gas seal itself has a certain leakage amount, and after the unit is operated for a period of time, the organic working medium leaks in large quantities, in order to ensure the system operation, the working medium is supplemented to ensure the power generation capacity, but long-term supplement of the working medium causes great loss to the enterprise. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a series connection type magnetic suspension waste heat power generating set, so as to solve the foregoing problems in the prior art.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A series connection type magnetic suspension waste heat power generating set, comprising a heat source input system, a power generation system and a working medium circulation system connected in sequence;

[0007] The heat source input system comprises a high water inlet, an evaporator and a preheater, the power generation system comprises a first-stage magnetic suspension ORC integrated machine and a second-stage magnetic suspension ORC integrated machine, the gas inlet of the first-stage magnetic suspension ORC integrated machine is connected with the working medium outlet of the evaporator, and the gas outlet of the first-stage magnetic suspension ORC integrated machine is connected with the gas inlet of the second-stage magnetic suspension ORC integrated machine through an exhaust pipe; the working medium circulation system comprises a condenser and a circulating pump, and the working medium after work enters the condenser from the second-stage magnetic suspension ORC integrated machine and is transported to the preheater by the circulating pump for preheating.

[0008] In some specific embodiments, the magnetic bearing control cabinet, the water chiller unit, the rectifier device, the inverter device, the isolation transformer and the grid-connected cabinet are further included; the magnetic bearing control cabinet is used for controlling the magnetic bearings of the first and second magnetic suspension ORC integrated machines; the water chiller units are respectively connected with the first and second magnetic suspension ORC integrated machines, and used for cooling the rotors thereof; the electric energy generated by the first and second magnetic suspension ORC integrated machines is sequentially connected to the grid through the rectifier device, the inverter device, the isolation transformer and the grid-connected cabinet.

[0009] In some specific embodiments, the air inlet pressure of the first magnetic suspension ORC integrated machine is 1.95 MPa, the air inlet temperature is 125 DEG C, the rated exhaust volume is 35 kg / s, the rated exhaust pressure is 0.72 MPa, and the power is 519 kw;

[0010] The air inlet pressure of the second magnetic suspension ORC integrated machine is 0.72 MPa, the air inlet temperature is 91 DEG C, the rated exhaust volume is 32 kg / s, and the rated exhaust pressure is 0.31 MPa.

[0011] In some specific embodiments, the first and second magnetic suspension ORC integrated machines both adopt coaxial structures, and the radial magnetic bearings and the thrust magnetic bearings are both provided with auxiliary bearings.

[0012] In some specific embodiments, the water chiller unit is provided with a desalted water supplementing port, and the water chiller unit is supplemented through the desalted water supplementing port.

[0013] In some specific embodiments, the pipes and flanges are used to connect the devices of the generator set, and the pipes and flanges are rigidly connected.

[0014] In some specific embodiments, the ORC host inlet, the ORC host bypass and the heat source taking port of the heat source input system are all provided with automatic control valves, which are used for automatically and remotely adjusting and controlling the corresponding controlled medium quality.

[0015] In some specific embodiments, the evaporator is a high-efficiency plate evaporator, the condenser is a combination structure of a wind-cooled condenser and a water-cooled condenser, and the magnetic bearing control cabinet is internally provided with an intelligent fault diagnosis module, which is used for monitoring the operating parameters of the magnetic bearings in real time.

[0016] In some specific embodiments, the preheater is internally provided with a turbulence structure.

[0017] The water chiller unit is provided with a variable frequency speed regulation device, which can automatically adjust the cooling water quantity and flow rate according to the real-time load and rotor temperature of the first and second magnetic suspension ORC integrated machines.

[0018] In some specific embodiments, the circulating pump in the working medium circulation system adopts a leakage-free magnetic force driving pump.

[0019] The shell of the primary magnetic suspension ORC integrated machine and the secondary magnetic suspension ORC integrated machine adopts a double-layer sound insulation structure, and the middle is filled with sound absorption materials;

[0020] The self-control valve is an electric regulating valve.

[0021] The utility model discloses a series connection type magnetic suspension waste heat generator unit, including heat source input system, power generation system and working medium circulating system that connect gradually, heat source input system includes high water inlet, evaporimeter and preheater, and power generation system includes primary magnetic suspension ORC integrated machine and secondary magnetic suspension ORC integrated machine, and the working medium export of evaporimeter is connected with the air inlet of primary magnetic suspension ORC integrated machine, and the air outlet of primary magnetic suspension ORC integrated machine is connected with the air inlet of secondary magnetic suspension ORC integrated machine through exhaust pipe, and working medium circulating system includes condenser, circulating pump, and the working medium after doing work is discharged from secondary magnetic suspension ORC integrated machine and enters condenser, and is transported to preheater and is preheated by circulating pump.

[0022] 1. High efficiency and energy saving: through the series connection type power generation structure and the efficient heat exchange components, the waste heat resources are fully utilized, compared with the traditional waste heat power generation technology, the power generation efficiency is improved significantly, and the enterprise energy consumption cost is effectively reduced.

[0023] 2. Stable and reliable: the application of magnetic suspension technology and multiple fault monitoring and protection measures, such as intelligent diagnosis of magnetic bearing control cabinet, setting of auxiliary bearing, leakage-free circulating pump, etc., reduce the equipment failure downtime, and guarantee the long-term stable operation of the unit.

[0024] 3. Environmental protection and low noise: the optimization design of condenser reduces water consumption, and the leakage-free circulating pump avoids working medium pollution, and the double-layer sound insulation structure of the unit shell, filled with sound absorption materials in the middle, effectively reduces noise, meets the noise emission standard, reduces operating noise, and meets the environmental protection requirements.

[0025] 4. Intelligent control: the self-control valve of heat source input system, the frequency conversion speed regulation of water chiller unit and the magnetic bearing control cabinet can realize remote intelligent control, real-time adjustment according to working conditions, convenient operation and reduction of labor cost. DRAWINGS

[0026] Figure 1 It is a traditional ORC layout structure schematic diagram of the series connection type magnetic suspension waste heat generator unit of the utility model;

[0027] Figure 2 It is a series connection type magnetic suspension ORC integrated machine system layout structure schematic diagram of the utility model;

[0028] Figure 3 It is a unit system operation schematic diagram of the utility model.

[0029] In the drawings, 1, high water inlet; 2, evaporator; 3, preheater; 4, first magnetic suspension orc integrated machine; 5, 1# water chiller; 6, 1# working medium condensate tank; 7, 1# water chiller desalted water supplement inlet; 8, second magnetic suspension orc integrated machine; 9, 2# water chiller; 10, 2# water chiller desalted water supplement inlet; 11, 2# working medium condensate tank; 12, condenser; 13, circulating cooling water inlet; 14, circulating cooling water outlet; 15, circulating pump; 16, high water outlet. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model and not used to limit the utility model.

[0031] Referring to Figure 1 , Figure 2 and Figure 3 , a series magnetic suspension waste heat generator set, comprising heat source input system, power generation system and working medium circulation system connected in sequence.

[0032] The heat source input system comprises high water inlet 1, evaporator 2 and preheater 3, other process section heat sources enter the evaporator through the high water inlet and exchange heat with the working medium, and the high water after heat exchange enters the preheater; the power generation system comprises first magnetic suspension orc integrated machine 4 and second magnetic suspension orc integrated machine 8, the gas inlet of the first magnetic suspension orc integrated machine 4 is connected with the working medium outlet of the evaporator 2, and the gas outlet of the first magnetic suspension orc integrated machine 4 is connected with the gas inlet of the second magnetic suspension orc integrated machine 8 through the exhaust pipe; the working medium circulation system comprises condenser 12 and circulating pump 15, the working medium after work is discharged from the second magnetic suspension orc integrated machine 8 and enters the condenser 12, and is delivered to the preheater 3 for preheating through the circulating pump 15.

[0033] In some specific embodiments, it further comprises magnetic bearing control cabinet, water chiller unit, rectifier device, inverter device, isolation transformer and grid-connected cabinet; the magnetic bearing control cabinet is used for controlling the magnetic bearings of the first magnetic suspension orc integrated machine 4 and the second magnetic suspension orc integrated machine 8; the water chiller unit is connected with the first magnetic suspension orc integrated machine 4 and the second magnetic suspension orc integrated machine 8 respectively and is used for cooling the rotors thereof; the electric energy generated by the first magnetic suspension orc integrated machine 4 and the second magnetic suspension orc integrated machine 8 is sequentially connected with the rectifier device, the inverter device and the isolation transformer and is connected with the grid through the grid-connected cabinet. It should be noted that the water chiller unit comprises 1# water chiller 5 and 2# water chiller 9.

[0034] The intelligent fault diagnosis module built in the magnetic bearing control cabinet can monitor the operating parameters of the magnetic bearing in real time, such as current, vibration, temperature, etc., and immediately alarm and take protective measures when abnormal, such as automatically switching to a standby magnetic bearing control mode, accurately controlling the magnetic bearing, and ensuring the safe and stable operation of the unit.

[0035] In some embodiments, the primary magnetic suspension ORC integrated machine 4 has an inlet pressure of 1.95 MPa, an inlet temperature of 125℃, a rated exhaust volume of 35 kg / s, a rated exhaust pressure of 0.72 MPa, and a power of 519 kw;

[0036] The inlet pressure of the secondary magnetic suspension ORC integrated machine is 0.72 MPa, the inlet temperature is 91℃, the rated exhaust volume is 32 kg / s, and the rated exhaust pressure is 0.31 MPa. The total power of the primary and secondary units is greater than the original ORC unit power. The two-stage unit adopts a series structure, fully utilizes the energy of the working medium, and the total power of the primary and secondary units is greater than the original ORC unit power, greatly improving the power generation efficiency.

[0037] In some embodiments, the primary magnetic suspension ORC integrated machine 4 and the secondary magnetic suspension ORC integrated machine 8 both adopt a coaxial structure, and the radial magnetic bearing and the thrust magnetic bearing are both provided with auxiliary bearings. This structure design improves the stability and reliability of the unit operation, and reduces the risk of shutdown due to bearing failure.

[0038] In some embodiments, the water chiller is provided with a desalted water supplement port for supplementing water to the water chiller.

[0039] In some embodiments, the devices in the generator set are connected through pipes and flanges, and the pipes and flanges are rigidly connected. The connection mode is determined according to the inlet and outlet of each device.

[0040] In some embodiments, the ORC host inlet, ORC host bypass, and heat source inlet of the heat source input system are provided with automatic control valves for automatically and remotely adjusting and controlling the amount of controlled medium. The automatic control valves can automatically and accurately adjust according to preset parameters, and these valves can accurately control the flow, temperature, and other parameters of the corresponding controlled medium, ensuring the stable and efficient operation of the heat source input system and meeting the needs of different working conditions.

[0041] In some specific embodiments, the evaporator 2 adopts a high-efficiency plate evaporator; the condenser 12 is a combination structure of air-cooled and water-cooled condensers; the magnetic bearing control cabinet has a built-in intelligent fault diagnosis module for real-time monitoring of the magnetic bearing's operating parameters. The use of a high-efficiency plate evaporator ensures that the working fluid can fully absorb heat from the heat source. After heat exchange, the high-temperature water temperature decreases, and it then enters the preheater to further utilize its remaining heat to preheat the working fluid, achieving cascaded energy utilization. The combination structure of air-cooled and water-cooled condensers can automatically switch operating modes according to ambient temperature and unit load, ensuring that the working fluid quickly condenses into a liquid state. The condensed working fluid is then transported to the preheater via a circulating pump.

[0042] In some specific embodiments, a turbulence-inducing structure is provided inside the preheater;

[0043] The chiller unit is equipped with a variable frequency speed control device, which can automatically adjust the cooling water volume and flow rate according to the real-time load and rotor temperature of the primary magnetic levitation ORC integrated machine 4 and the secondary magnetic levitation ORC integrated machine 8. This ensures energy-efficient operation while optimizing energy consumption, thus maintaining effective cooling.

[0044] In some specific embodiments, the circulating pump in the working fluid circulation system is a leak-free magnetically driven pump. This avoids pollution and corrosion caused by working fluid leakage, reduces maintenance costs, stably sends the working fluid back to the preheater for preheating, completes the working fluid circulation process, and ensures the continuous operation of the entire unit.

[0045] The outer shells of the Level 1 Magnetic Levitation ORC Integrated Machine 4 and the Level 2 Magnetic Levitation ORC Integrated Machine 8 adopt a double-layer sound insulation structure with sound-absorbing material filling the middle. The self-control valve is an electric regulating valve.

[0046] In this embodiment, the electrical energy generated by the primary magnetic levitation ORC integrated unit 4 and the secondary magnetic levitation ORC integrated unit 8 is sequentially rectified, inverted, and isolated by an isolation transformer before being connected to the power grid through a grid-connected cabinet. These devices work together to convert the electrical energy generated by the units into a form of electrical energy that meets the requirements of the power grid, thereby achieving stable grid-connected power supply.

[0047] Reference Figure 3 The working principle of this utility model is as follows:

[0048] In other process sections, the heat source enters the evaporator 2 through the high-pressure water inlet 1 to exchange heat with the working fluid. After the heat exchange is completed, the working fluid enters the first-stage magnetic levitation ORC integrated machine 4 to generate electricity. The heat generated by the first-stage magnetic levitation ORC integrated machine 4 is removed by the No. 1 chiller 5. The working fluid after generating electricity enters the No. 1 working fluid condensate tank 6 for condensation. The No. 1 chiller demineralized water inlet 7 provides water for the No. 1 chiller 5. The exhaust steam from the first-stage magnetic levitation ORC integrated machine 4 enters the second-stage magnetic levitation ORC integrated machine 8 to generate electricity. The heat generated by the second-stage magnetic levitation ORC integrated machine 8 is removed by the No. 2 chiller 9. The working fluid after generating electricity enters the No. 2 working fluid condensate tank 11 for condensation. The No. 2 chiller demineralized water inlet 10 provides water for the No. 1 chiller 9.

[0049] After the working fluid has done its work, it enters the condenser 12 and then enters the preheater 3 through the pipeline via the circulating pump 15 for preheating. Meanwhile, the circulating cooling water enters the condenser 12 through the inlet 13 to exchange heat with the working fluid. After heat exchange, the circulating cooling water exits through the outlet 14 and is discharged to other process sections. The high-pressure water passes through the preheater 3 and is then transported to other process sections through the high-pressure water outlet 16.

[0050] The current unit differs from traditional units in that, while ensuring 1MW of power generation, the use of maglev units can solve the problem of working fluid leakage.

[0051] During actual installation and operation:

[0052] 1. All equipment is connected to each other by pipes and flanges, and the pipes and flanges are rigidly connected. The connection method is determined according to the inlet and outlet of each equipment to ensure tight connection and no leakage, and to ensure stable transmission of working fluid and heat source.

[0053] 2. In accordance with the design requirements, adjust the operating parameters of each component, such as the heat exchange efficiency of the evaporator, the intake and exhaust parameters of the magnetic levitation turbine generator, and the cooling water temperature of the chiller unit, so as to achieve the best operating condition.

[0054] 3. After the unit is started, the operating status of each component is monitored in real time through the remote control system. Based on the actual working conditions, the unit operation is optimized by using intelligent control methods such as automatic control valves and variable frequency speed control devices to achieve efficient and stable waste heat power generation.

[0055] In summary, this series-connected magnetic levitation waste heat power generation unit effectively solves many problems of traditional waste heat power generation, has broad application prospects, and can make an important contribution to industrial energy conservation and emission reduction.

[0056] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0057] 1. The technical effects and advantages achieved by this invention are: simple structure; automatic control valves are required at the ORC host inlet, ORC host bypass, and heat source outlet; these valves can automatically and remotely adjust and control the corresponding controlled medium flow, enabling the system to operate stably and fulfilling the device's adjustment and interlocking protection functions.

[0058] 2. When the heat source experiences abnormal operating conditions, the power generation system can quickly disconnect without causing fluctuations in the power grid.

[0059] 3. When the heat source fluctuates, the load of the power generation system can rise and fall smoothly with the production fluctuations.

[0060] 4. Compared to traditional dry gas seals which are prone to leakage, the integrated magnetic levitation turbine unit can achieve zero working fluid leakage.

[0061] 5. The two-stage turbine design can, to some extent, reduce the stress exerted by the first-stage turbine on the main engine structure.

[0062] 6. Theoretically, there is no upper limit to the rotational speed of maglev units. These units are all high-speed units and are not constrained by the gas station system.

[0063] 7. The unit has a simple structure and is easy to maintain in the later stage. It does not require a large number of spare parts, thus avoiding waste of resources.

[0064] 8. The unit adopts a coaxial mechanism, and auxiliary bearings are designed for both the radial magnetic bearing and the thrust magnetic bearing. In extreme cases of rotor falling, the auxiliary bearings bear the impact of the rotor falling, thereby protecting the magnetic bearings and the rotor.

[0065] 9. The rotor is cooled by a chiller unit with circulating chilled water to ensure stable rotor operation.

[0066] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A series-type magnetic levitation waste heat generator set, characterized in that, The application relates to a series connection type magnetic suspension waste heat generator set. The series connection type magnetic suspension waste heat generator set comprises a heat source input system, a power generation system and a working medium circulation system which are sequentially connected; the heat source input system comprises a high-pressure water inlet (1), an evaporator (2) and a preheater (3); the power generation system comprises a first-stage magnetic suspension ORC integrated machine (4) and a second-stage magnetic suspension ORC integrated machine (8); the gas inlet of the first-stage magnetic suspension ORC integrated machine (4) is connected with the working medium outlet of the evaporator (2); the gas outlet of the first-stage magnetic suspension ORC integrated machine (4) is connected with the gas inlet of the second-stage magnetic suspension ORC integrated machine (8) through a gas exhaust pipe; the working medium circulation system comprises a condenser (12) and a circulating pump (15); the working medium after work is discharged from the second-stage magnetic suspension ORC integrated machine (8) and then enters the condenser (12) and is delivered to the preheater (3) through the circulating pump (15) to be preheated.

2. The series connection type magnetic suspension waste heat generator set according to claim 1, further comprising a magnetic bearing control cabinet, a water chiller, a rectifier device, an inverter device, an isolation transformer and a grid-connected cabinet; the magnetic bearing control cabinet is used for controlling the magnetic bearings of the first-stage magnetic suspension ORC integrated machine (4) and the second-stage magnetic suspension ORC integrated machine (8); the water chillers are connected with the first-stage magnetic suspension ORC integrated machine (4) and the second-stage magnetic suspension ORC integrated machine (8) respectively and are used for cooling the rotors of the first-stage magnetic suspension ORC integrated machine (4) and the second-stage magnetic suspension ORC integrated machine (8); the electric energy generated by the first-stage magnetic suspension ORC integrated machine (4) and the second-stage magnetic suspension ORC integrated machine (8) is sequentially rectified by the rectifier device, inverter by the inverter device, isolation by the isolation transformer and then is connected with the grid through the grid-connected cabinet.

3. The series connection type magnetic suspension waste heat generator set according to claim 1, wherein the gas inlet pressure of the first-stage magnetic suspension ORC integrated machine (4) is 1.95 MPa, the gas inlet temperature is 125 DEG C, the rated exhaust volume is 35 kg / s, the rated exhaust pressure is 0.72 MPa and the power is 519 kw; the gas inlet pressure of the second-stage magnetic suspension ORC integrated machine is 0.72 MPa, the gas inlet temperature is 91 DEG C, the rated exhaust volume is 32 kg / s and the rated exhaust pressure is 0.31 MPa.

4. The series connection type magnetic suspension waste heat generator set according to claim 1, wherein the first-stage magnetic suspension ORC integrated machine (4) and the second-stage magnetic suspension ORC integrated machine (8) both adopt coaxial structures, and the radial magnetic bearings and the thrust magnetic bearings of the coaxial structures are both provided with auxiliary bearings.

5. The series connection type magnetic suspension waste heat generator set according to claim 2, wherein the water chillers are provided with desalted water supplementing openings, and the water chillers are supplemented with water through the desalted water supplementing openings.

6. The series connection type magnetic suspension waste heat generator set according to claim 1, wherein the pipes and flanges are used for connecting the devices of the generator set.

7. The series connection type magnetic suspension waste heat generator set according to claim 2, wherein the ORC host inlet, the ORC host bypass and the heat source taking opening of the heat source input system are all provided with self-control valves which are used for automatically and remotely adjusting and controlling the corresponding controlled medium quantity. ​ ​ ​ ​ ​ ​ ​ ​ 8. The series magnetic suspension waste heat generator set according to claim 2, characterized in that, the evaporator (2) is a high-efficiency plate evaporator; the condenser (12) is a combined structure of air-cooled and water-cooled condensers; the magnetic bearing control cabinet is provided with an intelligent fault diagnosis module for real-time monitoring of the operating parameters of the magnetic bearing.

9. The series magnetic suspension waste heat generator set according to claim 2, characterized in that, the preheater is provided with a turbulence structure inside; the water chiller is provided with a variable frequency speed regulation device, which can automatically adjust the cooling water volume and flow rate according to the real-time load and rotor temperature of the primary magnetic suspension orc all-in-one machine (4) and the secondary magnetic suspension orc all-in-one machine (8).

10. The series magnetic suspension waste heat generator set according to claim 7, characterized in that, the circulating pump in the working medium circulation system is a leakage-free magnetic drive pump; the shells of the primary magnetic suspension orc all-in-one machine (4) and the secondary magnetic suspension orc all-in-one machine (8) adopt a double-layer sound insulation structure filled with sound-absorbing material in the middle; the self-control valve is an electrically adjusted valve.

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