Magnetic suspension ORC waste heat gradient utilization system

Abstract

The utility model belongs to the technical field of waste heat power generation, and discloses a magnetic suspension ORC waste heat gradient utilization system which comprises a magnetic suspension turbine generator set and a magnetic suspension low-temperature waste heat generator set which are connected in series, the magnetic suspension turbine generator set comprises a first turbine generator, and the magnetic suspension low-temperature waste heat generator set comprises an evaporator. An outlet of the first turbine generator is connected with an inlet of the evaporator, an outlet of the evaporator is connected with a second turbine generator, an outlet of the second turbine generator is connected with a condenser, an outlet of the condenser is connected with a liquid storage tank, an outlet of the liquid storage tank is connected with a working medium pump, an outlet of the working medium pump is connected with the inlet of the evaporator, and an outlet of the evaporator is further connected with a heating device. An outlet of the heating device is connected with an inlet of the first turbine generator, and the condenser is connected with a cooling device for ensuring the cooling and condensing effects of the condenser; the magnetic suspension generator is simple in overall structure, waste heat steam can be utilized in two stages, the power generation efficiency of the magnetic suspension generator is further improved, and the using effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat power generation, and specifically relates to a magnetic suspension ORC waste heat cascade utilization system. Background Art

[0002] As an advanced energy utilization technology, the magnetic levitation ORC (Organic Rankine Cycle) cascade utilization system has the unique advantage of being able to efficiently utilize medium and low-grade thermal energy and convert it into electrical energy, thereby achieving cascade utilization and efficient conversion of energy.

[0003] The magnetic levitation ORC cascade utilization system is designed based on magnetic levitation technology and the principle of organic Rankine cycle. The magnetic levitation ORC cascade utilization system realizes the contactless operation of rotating parts and stationary parts by introducing magnetic levitation technology, thereby greatly reducing the friction loss and mechanical wear of the system and improving the stability and reliability of the system.

[0004] Magnetic levitation technology is a technology that uses magnetic field force to make objects levitate without contact. In the magnetic levitation ORC step utilization system, magnetic levitation technology is applied between the rotor and stator of the generator set, and the rotor is levitated without contact and rotated at high speed through electromagnetic force. This design not only reduces mechanical wear and energy loss, but also reduces the noise and vibration of the system, and improves the operating efficiency and stability of the system.

[0005] The organic Rankine cycle is a cyclic process that uses organic working fluids to convert heat energy. In the magnetic levitation ORC cascade utilization system, low-temperature thermal energy (such as industrial waste gas, geothermal energy, etc.) is used as a heat source, and the organic working fluid is heated to a steam state through the evaporator. The steam drives the expander to rotate and drives the generator to generate electricity. Subsequently, the steam is condensed into liquid in the condenser and sent back to the evaporator through the working fluid pump to complete the cycle. ORC technology has broad application prospects in the field of medium and low-grade thermal energy utilization due to its low requirements for heat source temperature and strong adaptability.

[0006] The magnetic levitation turbine generator set is connected in series with the magnetic levitation ORC (Organic Rankine Cycle) waste heat generator set to form a form of waste heat cascade utilization. This configuration is designed to maximize the extraction and conversion of waste heat resources of different grades to achieve efficient energy utilization and energy conservation and emission reduction. At present, steam turbine generator sets are very popular, and the lower temperature steam generated at the outlet is basically unused. Now we can use the magnetic levitation low-temperature waste heat generator set to further utilize the steam at the outlet of the turbine generator set, adopt a secondary utilization form, and use heat energy more efficiently, greatly shortening the power generation, comprehensive power generation efficiency and payback period, and further improving the utilization rate of heat energy and carbon saving.

[0007] The Chinese patent with application number 2019208136506 discloses an ORC magnetic levitation power generation system for medium and low temperature geothermal waste pressure cascade utilization, which includes an evaporator for evaporating working fluid; and a condenser for condensing working fluid, a cooling device for cooling the condenser; and a generator, including a first-stage turbine and a second-stage turbine; the cooling device is connected to the second-stage turbine; the working fluid steam outlet of the evaporator is connected to the inlet of the generator; the outlet of the generator is connected to the condenser, and the condenser outlet is connected to the liquid working fluid inlet of the evaporator. In the utility model, the gaseous working fluid expands and works once in the two-stage turbine respectively, wherein the first-stage turbine drives the generator to generate electricity through a coupling; the second-stage turbine drives the impeller to rotate through the coupling, accelerates the air flow on the surface of the condenser, strengthens the heat exchange capacity of the condenser, reduces the condensation temperature and condensation pressure, thereby increasing the pressure difference and temperature difference at both ends of the inlet and outlet of the magnetic levitation generator, and improving the power generation efficiency of the magnetic levitation generator.

[0008] In the utility model, the working fluid absorbs the heat of medium and low temperature geothermal energy and converts it into gas, and then works on the first and second turbines to generate electricity. After the working fluid absorption is completed, part of the residual heat is wasted, and the low temperature residual heat is not fully utilized. Utility Model Content

[0009] The main technical problem to be solved by the utility model is to provide a magnetic suspension ORC waste heat cascade utilization system with a simple overall structure and capable of performing two-stage utilization of waste heat steam, wherein the first stage directly acts on the turbine generator, and the second stage acts on the turbine generator after absorbing heat by the working fluid, making full use of low-temperature waste heat and further improving the power generation efficiency of the magnetic suspension generator.

[0010] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0011] A magnetic suspension ORC waste heat cascade utilization system comprises a magnetic suspension turbine generator set and a magnetic suspension low-temperature waste heat generator set connected in series, wherein the magnetic suspension turbine generator set comprises a first turbine generator, and the magnetic suspension low-temperature waste heat generator set comprises an evaporator, wherein the outlet of the first turbine generator is connected to the inlet of the evaporator, the outlet of the evaporator is connected to the second turbine generator, the outlet of the second turbine generator is connected to a condensing assembly, the outlet of the evaporator is also connected to a heating device, and the outlet of the heating device is connected to the inlet of the first turbine generator.

[0012] The following is a further optimization of the above technical solution by the utility model:

[0013] The condensing assembly includes a condenser connected to the outlet of the second turbine generator.

[0014] Further optimization: the condenser outlet is connected with a liquid storage tank.

[0015] Further optimization: the outlet of the liquid storage tank is connected to a working fluid pump, and the outlet of the working fluid pump is connected to the inlet of the evaporator.

[0016] Further optimization: the condenser is also connected with a cooling device to ensure the cooling and condensing effect of the condenser.

[0017] Further optimization: the cooling device includes a cooling pump connected to the inlet of the condenser, the inlet end of the cooling pump is connected to a cooling tower, and the inlet of the cooling tower is connected to the outlet of the condenser.

[0018] The utility model adopts the above technical scheme, has ingenious conception and reasonable structure, can make full use of waste heat steam generated in industry, reduce waste heat emission, reduce energy consumption and greenhouse gas emissions in industrial production processes, can improve power generation efficiency, is safe and reliable, and is easy to operate. The overall structure is simple, easy to manufacture and produce, can reduce production and use costs, and improve economic benefits.

[0019] This system first uses the waste heat steam to act on the first turbine generator for electrical energy conversion, and then the medium and low temperature waste heat steam flowing out of the outlet of the first turbine generator converts the organic working fluid into gaseous organic working fluid and then acts on the second turbine generator for electrical energy conversion. By setting up two electrical energy conversions, the potential of waste heat at different temperatures is repeatedly tapped, avoiding the efficiency loss of a single unit due to the temperature limitation of the heat source, and improving the overall energy utilization efficiency.

[0020] The magnetic levitation turbine generator set and the magnetic levitation low-temperature waste heat generator set are two independent power generation units that can flexibly adjust their respective operating states according to the waste heat supply situation and load demand, and have strong adaptability.

[0021] At the same time, the application of magnetic levitation technology helps to reduce mechanical wear, reduce maintenance costs, and extend the service life of key components.

[0022] The magnetic levitation turbine generator set and the magnetic levitation low-temperature waste heat generator set are connected in series to build an efficient waste heat cascade utilization system, which can maximize the utilization of waste heat resources at different temperature levels, improve energy utilization efficiency, reduce environmental pollution, and have good operational flexibility and economy.

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the working principle of the overall structure in the embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of the system flow in the embodiment of the utility model.

[0026] In the figure: 1-first turbine generator; 2-magnetic levitation low-temperature waste heat generator set; 21-evaporator; 22-second turbine generator; 23-condenser; 230-cooling tower; 231-cooling pump; 24-working fluid pump; 25-liquid storage tank; 3-heating device. DETAILED DESCRIPTION

[0027] like Figure 1-2 As shown: a magnetic levitation ORC waste heat cascade utilization system, including a magnetic levitation turbine generator set and a magnetic levitation low-temperature waste heat generator set 2 connected in series, the magnetic levitation turbine generator set includes a first turbine generator 1, the magnetic levitation low-temperature waste heat generator set 2 includes an evaporator 21, the outlet of the first turbine generator 1 is connected to the inlet of the evaporator 21, the outlet of the evaporator 21 is connected to the second turbine generator 22, the outlet of the second turbine generator 22 is connected to a condensing component, the outlet of the evaporator 21 is also connected to a heating device 3, and the outlet of the heating device 3 is connected to the inlet of the first turbine generator 1.

[0028] The condensing assembly includes a condenser 23 connected to the outlet of the second turbine generator 22 .

[0029] The outlet of the condenser 23 is connected to a liquid storage tank 25 .

[0030] The outlet of the liquid storage tank 25 is connected to a working fluid pump 24 .

[0031] The outlet of the working fluid pump 24 is connected to the inlet of the evaporator 21 .

[0032] In this embodiment, the magnetic levitation technology is applied to the bearing system of the first turbine generator 1, so that the rotor can rotate at high speed in a non-contact state, reduce friction loss, and improve the efficiency and reliability of the unit.

[0033] The magnetic levitation turbine generator set is suitable for generating electricity using medium and high temperature waste heat. The waste heat steam generated from the industrial process drives the turbine blades inside the first turbine generator 1 to rotate. The turbine blades are coaxially connected to the generator. The kinetic energy generated by the rotation of the turbine is transmitted to the generator through a transmission device, that is, converted into electrical energy output.

[0034] The waste heat steam is discharged from the outlet of the first turbine generator 1 and converted into medium-low temperature waste heat steam (temperature is 90-200° C.), and the medium-low temperature waste heat steam enters the evaporator 21 through the inlet of the evaporator 21 .

[0035] The liquid storage tank 25 stores liquid organic working fluid, and the organic working fluid is characterized by a low boiling point.

[0036] At this time, the working medium pump 24 is started to transport the liquid organic working medium in the liquid storage tank 25 to the evaporator 21 through the inlet of the evaporator 21, and the liquid organic working medium absorbs the medium and low temperature waste heat steam and evaporates into gaseous organic working medium.

[0037] The gaseous organic working medium then acts on the second turbine generator 22 to drive the turbine blades of the second turbine generator 22 to rotate. The turbine blades of the second turbine generator 22 are coaxially connected to the generator of the second turbine generator 22.

[0038] The kinetic energy generated by the turbine blades of the second turbine generator 22 is transmitted to the generator of the second turbine generator 22 through the transmission device, and is further converted into electrical energy for output.

[0039] The gaseous organic working medium output from the outlet of the second turbine generator 22 enters the condenser 23, is condensed into liquid organic working medium by the condenser 23, and enters the liquid storage tank 25, and then circulates.

[0040] The medium and low temperature waste heat steam is converted into condensed water after the waste heat is absorbed by the liquid organic working medium in the evaporator 21. The condensed water enters the heating device 3 and is converted into waste heat steam or waste heat of the gas turbine exhaust after being heated at high temperature for recycling.

[0041] In this embodiment, the heating device 3 is a device that utilizes waste heat generated by a boiler to heat condensed water to generate steam. The specific working principle and process thereof are well known and widely used, and will not be described in detail here.

[0042] The condenser 23 is also connected to a cooling device to ensure the cooling and condensing effect of the condenser 23 .

[0043] The cooling device includes a cooling pump 231 connected to the inlet of the condenser 23 . The inlet end of the cooling pump 231 is connected to a cooling tower 230 . The inlet of the cooling tower 230 is connected to the outlet of the condenser 23 .

[0044] In this embodiment, the cooling tower 230 is a device that uses water as a circulating coolant, absorbs heat from the system and discharges it into the atmosphere to reduce the water temperature. That is, the cooling water enters the condenser 23 through the action of the cooling pump 231 to ensure that the condenser 23 is in a condensation and cooling state. The cooling water that absorbs heat from the condenser 23 then enters the cooling tower 230 for cooling and circulation.

[0045] The circulation of the organic working medium and the cooling water in the condenser 23 is in different paths, so as to ensure that the organic working medium can be converted into liquid under the cooling effect of the cooling water and will not be contaminated by the cooling water.

[0046] The circulation of the medium and low temperature waste heat steam and the organic working medium in the evaporator 21 is in different paths, ensuring that the organic working medium can absorb the heat of the medium and low temperature waste heat steam and become a gaseous organic working medium in the evaporator 21 .

[0047] like Figure 2As shown, when in use, the circulation route of the system is:

[0048] First, the waste heat steam acts on the first turbine generator 1, so that the first turbine generator 1 generates electric energy, and the medium and low temperature waste heat steam output from the outlet of the first turbine generator 1 enters the evaporator 21;

[0049] Secondly, the liquid organic working medium is input into the evaporator 21 by the working medium pump 24, absorbs the heat of the medium and low temperature waste heat steam, and turns the liquid organic working medium into a gaseous organic working medium, which acts on the second turbine generator 22 to generate electric energy again;

[0050] Furthermore, the gaseous organic working medium outputted from the outlet of the second turbine generator 22 is condensed by the condenser 23, converted into liquid organic working medium, and enters the liquid storage tank 25 for cyclic use;

[0051] Finally, the medium-low temperature waste heat steam in the evaporator 21 is converted into condensed water after the liquid organic working medium absorbs all the heat, and then flows into the heating device 3 to be converted into steam again for cyclic use.

[0052] This system first uses the waste heat steam to act on the first turbine generator 1 to convert it into electrical energy. Then, the medium and low temperature waste heat steam from the outlet of the first turbine generator 1 converts the organic working fluid into a gaseous organic working fluid and then acts on the second turbine generator 22 to convert it into electrical energy. By setting up two electrical energy conversions, the potential of waste heat at different temperatures is repeatedly tapped, avoiding the efficiency reduction of a single unit due to the temperature limitation of the heat source, thereby improving the overall energy utilization efficiency.

[0053] For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and deformations made to the implementation methods are still within the protection scope of the present invention.

Claims

1. A magnetic suspension ORC waste heat cascade utilization system, comprising a magnetic suspension turbine generator set and a magnetic suspension low-temperature waste heat generator set (2) connected in series, characterized in that: The magnetic levitation turbine generator set comprises a first turbine generator (1), and the magnetic levitation low-temperature waste heat generator set (2) comprises an evaporator (21). The outlet of the first turbine generator (1) is connected to the inlet of the evaporator (21), the outlet of the evaporator (21) is connected to the second turbine generator (22), the outlet of the second turbine generator (22) is connected to a condensing assembly, the outlet of the evaporator (21) is also connected to a heating device (3), and the outlet of the heating device (3) is connected to the inlet of the first turbine generator (1).

2. The magnetic suspension ORC waste heat cascade utilization system according to claim 1 is characterized in that: The condensing assembly comprises a condenser (23) connected to the outlet of the second turbine generator (22).

3. The magnetic suspension ORC waste heat cascade utilization system according to claim 2 is characterized in that: The outlet of the condenser (23) is connected to a liquid storage tank (25).

4. The magnetic suspension ORC waste heat cascade utilization system according to claim 3 is characterized by: The outlet of the liquid storage tank (25) is connected to a working fluid pump (24), and the outlet of the working fluid pump (24) is connected to the inlet of the evaporator (21).

5. The magnetic suspension ORC waste heat cascade utilization system according to claim 4 is characterized in that: The condenser (23) is also connected to a cooling device for ensuring the cooling and condensing effect of the condenser (23).

6. The magnetic suspension ORC waste heat cascade utilization system according to claim 5 is characterized in that: The cooling device comprises a cooling pump (231) connected to the inlet of the condenser (23), the inlet end of the cooling pump (231) is connected to a cooling tower (230), and the inlet of the cooling tower (230) is connected to the outlet of the condenser (23).

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