CN104533660A - Exhaust turbine generator set - Google Patents

Abstract

An exhaust gas turbine generator set includes a turbine, a permanent magnet generator and an inverter. The turbine is used for receiving exhaust gas to be driven to rotate by the exhaust gas. The permanent magnet generator is driven by rotation of the turbine to generate electricity. The inverter is electrically connected with the permanent magnet generator to convert the electric power generated by the permanent magnet generator into required electric power.

Description

Exhaust gas turbine generator set

technical field

The invention relates to a power generation device, in particular to an exhaust gas turbine generator set utilizing exhaust gas residual heat and residual pressure.

Background technique

In the existing exhaust gas generator, complex valve group equipment is used to control the flow of the exhaust gas before entering the turbine, so as to control the frequency and power of the generated electric power. In the existing configuration, since the turbine speed needs to be constant, the exhaust gas generator can only operate to generate electricity when the main engine is running at a certain range of power. For example, the turbine can only be connected to generate electricity within the range of 70-100% of the main power. Otherwise, the frequency and voltage of the generated electricity fluctuate widely, which cannot meet the requirements of grid connection. If the power of the main engine is too high or too low, the exhaust generator will stop. Therefore, the exhaust gas when the main engine is running at low power cannot be recycled, resulting in low recycling efficiency.

Contents of the invention

In view of this, this paper proposes an exhaust gas turbine generator set to efficiently recover the waste heat and pressure of the waste gas.

The exhaust gas turbogenerator set proposed in this paper generally includes a turbine, a permanent magnet generator and an inverter. The turbine is used for receiving exhaust gas to be driven to rotate by the exhaust gas. The permanent magnet generator is driven by rotation of the turbine to generate electricity. The inverter is electrically connected with the permanent magnet generator to convert the electric power generated by the permanent magnet generator into required electric power.

In an embodiment, a reduction box may be arranged between the turbine and the permanent magnet generator.

In one embodiment, the exhaust gas is the exhaust gas of a piston engine.

In one embodiment, the piston engine includes a supercharger, and the exhaust gas is exhaust gas discharged from the supercharger.

This paper also proposes an exhaust gas turbogenerator set, including an exhaust gas collection device and at least one turbogenerating unit. The exhaust collection device is in fluid communication with at least one exhaust source for collecting exhaust from the at least one exhaust source. The at least one turbine power generation unit is connected to the exhaust gas collection device to utilize the exhaust gas to generate electricity. Wherein, each turbine generating unit includes a turbine, a permanent magnet generator and an inverter. The turbine is in fluid communication with the exhaust gas collection device, and is used for receiving the exhaust gas collected by the exhaust gas collection device and being driven to rotate by the exhaust gas. The permanent magnet generator is driven by rotation of the turbine to generate electricity. The inverter is electrically connected with the permanent magnet generator to convert the electric power generated by the permanent magnet generator into required electric power.

In one embodiment, there are multiple exhaust gas sources, and one turbine power generation unit. In another embodiment, there are multiple exhaust gas sources and multiple turbine power generation units, and each turbo power generation unit is selectively turned on according to the quantity of exhaust gas. In another embodiment, there is one exhaust gas source, and multiple turbine power generation units, and each turbine power generation unit is selectively turned on according to the amount of exhaust gas.

In some embodiments, the exhaust source is a piston engine.

To sum up, the exhaust gas turbine generator set provided in this paper uses an inverter to convert the power generated by the permanent magnet generator. When combined with a piston engine, a turbogenerator set can operate over a greater range of engine power. Theoretically, as long as the engine is running, regardless of full or partial working conditions, the turbogenerator set can automatically sense and run automatically, so the recovery of waste heat and pressure of exhaust gas is more efficient. It is no longer necessary to arrange complex valve group equipment on the upstream of the turbine to control the exhaust gas flow through the turbine, so the present invention also simplifies the system control and structure, and reduces the cost. In some embodiments, the exhaust gas from one or more exhaust gas sources is combined to drive one or more turbine power generation units. In this way, these power generation units can be selectively opened according to the amount of exhaust gas at the front end, so that the turbine power generation units can work at the best design efficiency point as much as possible, and the operating efficiency of the power generation device can be improved. In addition, the embodiment in which multiple sources of exhaust gas drive a power generation unit reduces the cost of the turbo power generation unit.

Description of drawings

FIG. 1 is a system schematic diagram of one embodiment of an exhaust gas turbogenerator set.

FIG. 2 is a system schematic diagram of another embodiment of the exhaust gas turbogenerator set.

FIG. 3 is a system schematic diagram of another embodiment of the exhaust gas turbogenerator set.

Detailed ways

Before describing the embodiments in detail, it should be understood that the present invention is not limited to the detailed structures or arrangements of elements described herein below or in the accompanying drawings. The present invention can be an embodiment implemented in other ways. Also, it should be understood that the phraseology and terminology used herein are for descriptive purposes only and should not be interpreted as limiting. The terms "including", "comprising", "having" and similar expressions used herein are meant to include the items listed thereafter, their equivalents and other additional items. In particular, when "a certain element" is described, the present invention does not limit the number of the element to one, but may also include a plurality.

FIG. 1 is a system schematic diagram of an embodiment of an exhaust gas turbogenerator set. The exhaust gas turbogenerator set in FIG. 1 generally includes a turbine 12 , a reduction box 14 , a permanent magnet generator 16 and an inverter 18 .

The turbine 12 is configured to receive exhaust gas from the exhaust gas source 10 to be rotated by the exhaust gas. The exhaust gas source 10 is, for example, exhaust gas generated by a piston engine 10 . In the case that the engine 10 is not equipped with a supercharger, the exhaust gas received by the turbine 12 can be directly obtained from the exhaust valve of the engine 10; when the engine 10 is equipped with a supercharger, the exhaust gas received by the turbine 12 can be Obtained from the exhaust port of the supercharger.

The rotational kinetic energy of the turbine 12 passes through the reduction box 14 and then drives the permanent magnet generator 16 to generate electricity. The inverter 18 is electrically connected with the permanent magnet generator 16 to convert the electric power generated by the permanent magnet generator 16 into required electric power. For example, the inverter 18 converts the electric power generated by the permanent magnet generator 16 into constant frequency and constant voltage electric power for grid connection.

By using the inverter 18 for power conversion, the turbogenerator set of the present invention can operate over a greater range of engine power. Theoretically, as long as the engine is running, regardless of full or partial working conditions, the turbogenerator set can automatically sense and run automatically. The upstream of the turbine 12 does not need to set complicated valve group equipment to control the exhaust gas flow through the turbine, so the present invention simplifies the system control and structure, and reduces the cost.

FIG. 2 is a system schematic diagram of another embodiment of the exhaust gas turbogenerator set. The exhaust gas turbine generator set in FIG. 2 generally includes a plurality of exhaust gas sources 20 , an exhaust gas collection device 21 , a turbine 22 , a reduction box 24 , a permanent magnet generator 26 and an inverter 28 . Wherein, the working principles and structures of the turbine 22, the reduction box 24, the permanent magnet generator 26, and the inverter 28 may be the same as those of the embodiment in FIG. 1 . The exhaust gas source 20 can also be a piston engine 20 as in the embodiment of FIG. 1 . The plurality of piston engines 10 are all in communication with the exhaust gas collection device 21 . Each piston engine 10 supplies exhaust gas to the exhaust gas collection device 21 only when it is running. As long as one engine 10 is running, the exhaust gas generating set can be driven to run. Compared with the situation where one engine 10 drives one exhaust gas generator set, multiple engines 10 jointly drive one exhaust gas generator set, which reduces the cost of the exhaust gas generator set.

FIG. 3 is a system schematic diagram of another embodiment of the exhaust gas turbogenerator set. The exhaust gas turbine generator set in FIG. 3 generally includes at least one exhaust gas source 30 , an exhaust gas collection device 31 , multiple turbines 32 , multiple reduction boxes 34 , multiple permanent magnet generators 36 , and multiple inverters 38 . Wherein, the working principles and structures of the turbine 32, the reduction box 34, the permanent magnet generator 36, and the inverter 38 may be the same as those of the foregoing embodiments. The exhaust gas source 30 can also be a piston engine 30 , the number of which can be one or several, all of which are in communication with the exhaust gas collection device 31 . Each piston engine 30 supplies exhaust gas to the exhaust gas collection device 31 only when it is running. As long as one engine 30 is running, it can drive the exhaust gas generating set at the rear end to run.

Different from the foregoing embodiments, the above-mentioned multiple turbines 32 , multiple reduction boxes 34 , multiple permanent magnet generators 36 , and multiple inverters 38 correspond to multiple generator sets. In the embodiment shown in FIG. 3 , there are two turbines 32 , reduction boxes 34 , permanent magnet generators 36 and two inverters 38 , so two generating units 40 are formed. The two power generation units can be selectively turned on and operated according to the amount of exhaust gas at the front end. For example, when the amount of exhaust gas is small (for example, only a part of the engine 30 is running or the engine 30 is running under low power conditions), only one power generation unit can be started to generate electricity, so that the turbine of the started power generation unit can work as close as possible to the optimum Design efficiency point locations. As the amount of exhaust gas increases (eg, more engines 30 are started or run at high or rated power), both power generation units can be turned on to generate electricity.

It should be noted that, although the above-mentioned embodiment only takes two power generation units as an example, the exhaust gas generator set of the present invention can be designed with any suitable number of power generation units according to the needs, and these power generation units are selectively opened according to the amount of exhaust gas at the front end . Although the above embodiments take a piston engine as the exhaust gas source as an example, the exhaust gas source can be any device that can provide high pressure and high temperature, such as garbage incinerators, other industrial exhaust gases, and the like.

To sum up, this paper provides an exhaust gas turbine generator set, which uses an inverter 18 to convert the electric power generated by the permanent magnet generator. When combined with a piston engine, a turbogenerator set can operate over a greater range of engine power. Theoretically, as long as the engine is running, regardless of full or partial working conditions, the turbogenerator set can automatically sense and run automatically. It is no longer necessary to arrange complicated valve group equipment on the upstream of the turbine to control the flow of exhaust gas passing through the turbine, so the present invention simplifies the system control and structure, and reduces the cost. In some embodiments, the exhaust gas from one or more exhaust gas sources is combined to drive one or more turbine power generation units. In this way, these power generation units can be selectively opened according to the amount of exhaust gas at the front end, so that the turbine power generation units can work at the best design efficiency point as much as possible, and the operating efficiency of the power generation device can be improved. In addition, the embodiment in which multiple sources of exhaust gas drive a power generation unit reduces the cost of the turbo power generation unit.

The concepts described herein may be implemented in other forms without departing from their spirit and characteristics. The particular embodiments disclosed are to be considered as illustrative rather than restrictive. Accordingly, the scope of the invention is to be determined by the appended claims rather than by these preceding descriptions. Any change within the literal meaning of the claims and within the range of equivalency shall belong to the scope of these claims.

Claims (10)

1. An exhaust gas turbine generator set, comprising a turbine, the turbine is used to receive exhaust gas to be driven to rotate by the exhaust gas, characterized in that, the exhaust gas turbine generator set further includes: a permanent magnet generator driven by rotation of the turbine to generate electricity; and an inverter, the inverter is electrically connected with the permanent magnet generator to convert the electric power generated by the permanent magnet generator into required electric power. 2. The exhaust gas turbine generator set according to claim 1, wherein a reduction box is arranged between the turbine and the permanent magnet generator. 3. The exhaust gas turbine generator set according to claim 1, wherein the exhaust gas is the exhaust gas of a piston engine. 4. The exhaust gas turbine generator set according to claim 3, wherein the piston engine includes a supercharger, and the exhaust gas is exhaust gas discharged from the supercharger. 5. An exhaust gas turbine generator set, characterized in that it comprises: an exhaust collection device in fluid communication with at least one exhaust source to collect exhaust from the at least one exhaust source; and At least one turbine power generation unit, the at least one turbine power generation unit is connected to the exhaust gas collection device to use the exhaust gas to generate electricity, wherein each turbine power generation unit includes: a turbine, the turbine is in fluid communication with the exhaust gas collection device, and is used to receive the exhaust gas collected by the exhaust gas collection device and be driven to rotate by the exhaust gas; a permanent magnet generator driven by rotation of the turbine to generate electricity; and an inverter, the inverter is electrically connected with the permanent magnet generator to convert the electric power generated by the permanent magnet generator into required electric power. 6 . The exhaust gas turbine generator set according to claim 5 , wherein there are multiple exhaust gas sources, and one turbine power generation unit. 7 . 7. The exhaust gas turbine generator set as claimed in claim 5, characterized in that, the quantity of the exhaust gas source is multiple, the quantity of the turbine power generation unit is multiple, and each turbine power generation unit is based on the The amount of exhaust gas can be selectively opened. 8. The exhaust gas turbine generator set as claimed in claim 5, wherein the quantity of the exhaust gas source is one, and the quantity of the turbine generating units is multiple, and each turbine generating unit is based on the exhaust gas can be selectively turned on. 9. The exhaust gas turbogenerator set according to claim 5, wherein the exhaust gas source is a piston engine. 10. The exhaust gas turbine generator set according to any one of claims 5-9, wherein a reduction box is arranged between the turbine and the permanent magnet generator.