CN214403791U - Waste heat comprehensive utilization system of coal mine gas internal combustion generator - Google Patents
Waste heat comprehensive utilization system of coal mine gas internal combustion generator Download PDFInfo
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- CN214403791U CN214403791U CN202023218457.XU CN202023218457U CN214403791U CN 214403791 U CN214403791 U CN 214403791U CN 202023218457 U CN202023218457 U CN 202023218457U CN 214403791 U CN214403791 U CN 214403791U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
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Abstract
The utility model discloses a waste heat comprehensive utilization system of a coal mine gas internal combustion generator, which comprises a power turbine, a steam turbine, an ORC unit, a double-shaft generator, a waste heat boiler, a condenser, a water return pump, a cylinder sleeve water supply pump, a deaerator and a condensed water recovery pump; the waste heat comprehensive utilization system has the advantages that the waste heat of the high-temperature section of the flue gas of the coal mine gas internal combustion generator is recycled by the aid of the power turbine, the waste heat of the low-temperature section of the flue gas is recycled by the aid of the steam turbine, and meanwhile, the waste heat comprehensive utilization system is used for recycling the waste heat of the cylinder sleeve water by the aid of the ORC system, so that the recycling rate of the waste heat of the coal mine gas generator is greatly improved, and meanwhile, the influence on external environment temperature is reduced.
Description
Technical Field
The utility model relates to a waste heat recovery recycles the technique, concretely relates to colliery gas internal combustion generator waste heat comprehensive utilization system.
Background
The main component of coal mine gas is methane, and the coal mine gas belongs to available clean energy. In order to strongly promote the development and utilization of coal mine gas, the coal mine gas extraction utilization scale is rapidly increased year by year, the gas control capability is obviously improved, and the coal mine gas development is preliminarily commercialized and scaled.
Because most coal mines cannot be directly combusted as fuel gas when the gas concentration is lower than 30%, many coal mines use the gas of the coal mines in a power generation mode of an internal combustion engine, and certain economic benefits and social benefits are generated.
However, the power generation efficiency of a gas internal combustion generator adopted in coal mine gas power generation is only about 30%, 60% -70% of energy is dissipated by the flue gas of the internal combustion generator and cylinder jacket water, the flue gas of the internal combustion generator is usually directly discharged to the atmosphere, the cylinder jacket water is cooled by cooling water of an external cooling tower and then circularly enters a generator cooling unit, the waste heat of the flue gas and the cylinder jacket water cannot be effectively utilized, great energy waste is caused, and meanwhile, the influence on the atmospheric environment temperature is caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the low generating efficiency when current colliery gas adopts gas internal combustion generator to generate electricity, internal combustion generator flue gas is direct directly to be discharged the unable effective utilization of atmosphere usually and can cause the problem of atmospheric environment temperature influence to and internal combustion generator's the unable effective problem that utilizes of cylinder liner water, the utility model provides a colliery gas internal combustion generator waste heat comprehensive utilization system, not only recycle colliery gas internal combustion generator's flue gas high temperature section, middle temperature section waste heat generate electricity, can retrieve cylinder liner water waste heat simultaneously and generate electricity.
The utility model discloses a basic realization principle is:
high-temperature smoke exhausted by the coal mine gas internal combustion generator drives the power turbine to do work for driving the double-shaft generator to generate power, then the high-temperature smoke is reduced to medium-temperature smoke, the medium-temperature smoke is reduced to low-temperature smoke after heat exchange and exhausted, the medium-temperature smoke generates superheated steam after heat exchange of the waste heat boiler to drive the steam turbine to do work for driving the double-shaft generator to generate power; water in a cylinder sleeve of the coal mine gas internal combustion generator enters an ORC unit evaporator to evaporate an organic working medium, and the organic working medium steam drives a turbine of the ORC unit to do work for power generation.
The technical scheme of the utility model is that: the comprehensive utilization system for the waste heat of the coal mine gas internal combustion generator comprises a power turbine, a steam turbine, an ORC unit, a double-shaft generator, a waste heat boiler, a condenser, a water return pump, a cylinder sleeve water supply pump, a deaerator and a condensed water recovery pump;
the power turbine, the steam turbine, the ORC unit and the double-shaft generator are integrated equipment; wherein, the double-shaft generator is an asynchronous generator;
the power turbine is connected with one end of the double-shaft generator through the power turbine clutch, the rear shaft end of the steam turbine is connected with the other shaft end of the double-shaft generator through the steam turbine clutch, and the ORC turbine in the ORC unit is connected with the front shaft of the steam turbine through the ORC clutch;
the internal combustion generator is connected with the power turbine through a first flue gas pipeline, and the power turbine is connected with the waste heat boiler through a second flue gas pipeline;
the waste heat boiler is connected with a steam turbine through a first steam pipeline, and the steam turbine is connected with a condenser through a second steam pipeline;
the cylinder sleeve in the internal combustion generator is connected with an ORC unit through a water pipe, and the ORC unit exchanges heat with high-temperature water discharged by the cylinder sleeve to convert the liquid organic working medium into organic working medium steam for driving an ORC turbine to rotate; the ORC unit is connected with the deaerator through a water return pump;
the deaerator is connected with the condenser through a condensed water recovery pump;
the deaerator is connected with a cylinder sleeve of the internal combustion engine generator through a cylinder sleeve water supply pump.
Furthermore, the power turbine clutch, the steam turbine clutch and the ORC clutch are all in ratchet structure forms.
Further, the ORC unit comprises an ORC turbine, an evaporator, an ORC condenser and a working medium pump; organic working medium steam output by the evaporator drives the ORC turbine to do work, then the organic working medium is condensed by the ORC condenser to form liquid organic working medium, and the liquid organic working medium enters the ORC evaporator again through the working medium pump to be evaporated, so that the power generation of the waste heat of the cylinder sleeve water is realized.
Further, the system also comprises a cooling tower and a cooling water pump; the condenser and the ORC condenser form respective cooling water circulation loops through a cooling tower and a cooling water pump.
Furthermore, the water pipe is provided with a regulating valve for controlling the flow of the cylinder liner water supplied to the ORC unit by the cylinder liner.
Compared with the prior art, the utility model, the technical advantage is:
(1) the utility model discloses to colliery gas generator waste heat wasting of resources's current situation, through exploring and studying, provide an utilize power turbine recycle colliery gas internal combustion generator's flue gas high temperature section waste heat, utilize steam turbine recycle flue gas low temperature section waste heat, utilize the waste heat comprehensive utilization system of ORC system recovery cylinder liner water waste heat simultaneously, by a wide margin promotion colliery gas generator waste heat's recycle ratio, also reduced the influence to external ambient temperature simultaneously.
(2) The utility model discloses power turbine, the steam turbine, ORC unit and biax generator are an integrated equipment, power turbine, the steam turbine, ORC unit directly or indirectly drives same biax generator, power turbine passes through power turbine clutch and is connected with biax generator's one end, the axle head passes through the steam turbine clutch behind the steam turbine and is connected with another axle head of biax generator, ORC turbine passes through the ORC clutch and is connected with the axle head before the steam turbine, power turbine and steam turbine can independently drive biax generator, also can drive biax generator simultaneously, ORC turbine can pass through steam turbine drive biax generator, simple system structure, not only can practice thrift equipment cost, simplify system control system simultaneously, and the running cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The reference numbers are as follows:
1-an internal combustion generator; 2-a power turbine; 3-a power turbine clutch; 4-a dual shaft generator; 5-turbine clutch; 6-a steam turbine; a 7-ORC clutch; an 8-ORC turbine; 9-a waste heat boiler; 10-a condenser; 11-a cooling water tower; 12-a cooling water pump; a 13-ORC condenser; a 14-ORC evaporator; 15-working medium pump; 16-a water return pump; 17-a deaerator; 18-condensate recovery pump; 19-cylinder liner water supply pump; 20-regulating valve.
A-a first flue gas pipeline, B-a second flue gas pipeline, C-a first steam pipeline, D-a second steam pipeline and E-a water pipe.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Colliery gas engine generator can not be fully with the energy transformation of colliery gas electric energy, and 60% ~ 70% energy is consumed by engine generator flue gas and cylinder liner water, causes very big energy extravagant, consequently need carry out recycle to generator flue gas waste heat and cylinder liner water waste heat to improve energy utilization, for this the utility model provides a colliery gas generator waste heat comprehensive utilization system and method.
Examples
The embodiment provides a comprehensive utilization system for waste heat of a coal mine gas internal combustion generator, which is shown in fig. 1 and comprises a plurality of internal combustion generators 1, a power turbine 2, a steam turbine clutch 3, a double-shaft generator 4, a steam turbine clutch 5, a steam turbine 6, an ORC unit, a waste heat boiler 9, a condenser 10, a cooling tower 11, a cooling water pump 12, a water return pump 16, a deaerator 17, a condensed water recovery pump 18, a cylinder liner water supply pump 19 and an adjusting valve 20;
the ORC unit comprises an ORC clutch 7, an ORC turbine 8, an ORC condenser 13, an ORC evaporator 14 and a working medium pump 15; organic working medium steam output by the ORC evaporator 14 drives the ORC turbine 8 to work, then forms condensed water through the ORC condenser 13, and the condensed water enters the ORC evaporator 14 again through the working medium pump 15 to be evaporated.
To the problem that high temperature flue gas utilization ratio is low among the gas internal combustion engine generator in colliery, the utility model discloses fall to 0.1MPa, 250 ℃ -300 ℃ middle temperature flue gas after 1 exhaust 0.25MPa, 500 ~ 600 ℃ high temperature flue gas drive power turbine 2 do work, fall to 0.01MPa after the middle temperature flue gas gets into the oxygen-eliminating water heat transfer that exhaust-heat boiler 9 and oxygen-eliminating device 17 provided, 110 ℃ low temperature flue gas is discharged, the oxygen-eliminating water produces superheated steam after the heat transfer of exhaust-heat boiler 9 and drives turbine 6 and do work, realize that high temperature section flue gas and middle and low temperature section flue gas retrieve the electricity generation.
To colliery gas internal combustion engine cylinder liner water waste heat resource waste problem, the utility model discloses carry the organic working medium of ORC evaporimeter 14 evaporation to produce organic working medium steam with internal combustion engine 1 exhaust cylinder liner water, get into once more after 17 deoxidizations of oxygen-eliminating device after cylinder liner water is cooled down by organic working medium cooling simultaneously and get into internal combustion engine 1 and cool off once more, get into ORC evaporimeter 14 evaporation once more after ORC condenser 13 condensation after organic working medium steam drive ORC turbine 8 does work, realize cylinder liner water waste heat power generation.
The specific connection structure of this embodiment is:
the power turbine 2, the steam turbine 6, the ORC unit and the double-shaft generator 4 are integrated equipment and drive the same double-shaft generator 4 to generate electricity; wherein, the double-shaft generator 4 is an asynchronous generator; the power turbine 2 is connected with one end of the double-shaft generator 4 through the power turbine clutch 3, the rear shaft end of the steam turbine 6 is connected with the other shaft end of the double-shaft generator 4 through the steam turbine clutch 5, and an ORC turbine 8 in the ORC unit is connected with the front shaft of the steam turbine 6 through an ORC clutch 7; wherein, the power turbine clutch 3, the steam turbine clutch 5 and the ORC clutch 7 are all in ratchet structure form; the automatic connection and disconnection of the power turbine, the steam turbine, the ORC turbine and the double-shaft generator can be realized according to the rotating speed;
the internal combustion generator 1 is connected with the power turbine 2 through a first flue gas pipeline A, and the power turbine 2 is connected with the waste heat boiler 9 through a second flue gas pipeline B; the waste heat boiler 9 is connected with the steam turbine 6 through a first steam pipeline C, and the steam turbine 6 is connected with the condenser 10 through a second steam pipeline D; the cylinder sleeve in the internal combustion generator is connected with the ORC unit through a water pipe E, and in order to control the flow of cylinder sleeve water supplied to the ORC unit by the cylinder sleeve, a regulating valve 20 is arranged on the water pipe; after exchanging heat with the high-temperature cylinder sleeve water, the liquid organic working medium of the ORC unit is converted into organic working medium steam for driving the ORC turbine 8 to rotate; the ORC unit is connected with a deaerator 17 through a water return pump 16; the deaerator 17 is connected with the condenser 10 through a condensed water recovery pump 18; the deaerator 17 is connected with a cylinder sleeve of the internal combustion engine generator 1 through a cylinder sleeve water supply pump 19; the condenser 10 and the ORC condenser 13 each form a cooling water circulation circuit by a cooling tower 11 and a cooling water pump 12.
The starting and using process of the utilization system comprises the following steps:
(1) starting a cooling water tower 11, and continuously supplying cooling water to a condenser 10 and an ORC condenser 13 by a cooling water pump 12;
(2) starting the double-shaft generator 4, wherein the double-shaft generator 4 is in a motor working state, and a power grid supplies power to the double-shaft generator 4;
(3) high-temperature flue gas of the internal combustion generator 1 enters the power turbine 2, the power turbine 2 is accelerated, the power turbine clutch 5 is automatically connected with the power turbine 2 and the double-shaft generator 4 when the rotating speed of the power turbine 2 is higher than that of the double-shaft generator 4, the power turbine 2 outputs mechanical energy to one shaft end of the double-shaft generator 4, and the double-shaft generator 4 converts the mechanical energy into electric energy to supply power to a power grid;
(4) the method comprises the following steps that (1) medium-temperature flue gas exhausted by a power turbine is subjected to heat exchange through a waste heat boiler 9 to generate steam, the steam enters a steam turbine 6, the steam turbine 6 is accelerated, when the rotating speed of the steam turbine 6 is higher than that of a double-shaft generator 4, a steam turbine clutch 5 is automatically connected with the steam turbine 6 and the double-shaft generator 4, the steam turbine 6 outputs mechanical energy to the other shaft end of the double-shaft generator 4, the double-shaft generator 4 converts all mechanical energy input from the two shaft ends into electric energy, and power is continuously supplied to a power grid;
(5) the cylinder liner water of the internal combustion generator enters the ORC evaporator, the ORC evaporator 14 outputs organic working medium steam to the ORC turbine 8, the ORC turbine 8 is accelerated, when the rotation speed of the ORC turbine 8 is higher than that of the steam turbine 6, the ORC clutch 7 is automatically connected with the ORC turbine 8 and the steam turbine 6, the ORC turbine 8 outputs mechanical energy to the steam turbine 6, the steam turbine 6 outputs the mechanical energy of the ORC turbine 8 and the mechanical energy generated by the steam turbine 6 to the double-shaft generator 4 through the steam turbine clutch 5, and the double-shaft generator 4 continuously converts all the mechanical energy input by two shaft ends into electric energy to supply power to a power grid.
The process of using the system to stop using is as follows:
(1) cylinder liner water input to the ORC evaporator 14 is cut off, the ORC turbine 8 is decelerated, and the connection between the ORC turbine 8 and the steam turbine 6 is automatically cut off;
(2) the steam input to the steam turbine 6 is cut off, and the steam turbine 6 is decelerated and automatically separated from the double-shaft generator 4;
(3) the flue gas input by the power turbine 2 is cut off, and the power turbine 2 is decelerated and automatically separated from the double-shaft generator 4;
(4) turning off the dual shaft generator 4;
(5) the cooling tower 11 is turned off and the cooling water pump 12 stops the supply of cooling water.
Claims (5)
1. The utility model provides a colliery gas internal combustion generator waste heat comprehensive utilization system which characterized in that: the system comprises a power turbine, a steam turbine, an ORC unit, a double-shaft generator, a waste heat boiler, a condenser, a water return pump, a cylinder sleeve water supply pump, a deaerator and a condensed water recovery pump;
the power turbine, the steam turbine, the ORC unit and the double-shaft generator are integrated equipment; wherein, the double-shaft generator is an asynchronous generator;
the power turbine is connected with one end of the double-shaft generator through the power turbine clutch, the rear shaft end of the steam turbine is connected with the other shaft end of the double-shaft generator through the steam turbine clutch, and the ORC turbine in the ORC unit is connected with the front shaft of the steam turbine through the ORC clutch;
the internal combustion generator is connected with the power turbine through a first flue gas pipeline, and the power turbine is connected with the waste heat boiler through a second flue gas pipeline;
the waste heat boiler is connected with a steam turbine through a first steam pipeline, and the steam turbine is connected with a condenser through a second steam pipeline;
the cylinder sleeve in the internal combustion generator is connected with an ORC unit through a water pipe, and the ORC unit exchanges heat with high-temperature water discharged by the cylinder sleeve to convert the liquid organic working medium into organic working medium steam for driving an ORC turbine to rotate; the ORC unit is connected with the deaerator through a water return pump;
the deaerator is connected with the condenser through a condensed water recovery pump;
the deaerator is connected with a cylinder sleeve of the internal combustion engine generator through a cylinder sleeve water supply pump.
2. The coal mine gas internal combustion generator waste heat comprehensive utilization system according to claim 1, characterized in that: the power turbine clutch, the steam turbine clutch and the ORC clutch are all in ratchet structure forms.
3. The coal mine gas internal combustion generator waste heat comprehensive utilization system according to claim 2, characterized in that: the ORC unit comprises an ORC turbine, an evaporator, an ORC condenser and a working medium pump; organic working medium steam output by the evaporator drives the ORC turbine to do work, then the organic working medium is condensed by the ORC condenser to form liquid organic working medium, the liquid organic working medium enters the ORC evaporator again through the working medium pump to exchange heat with cylinder sleeve water for evaporation, and the cylinder sleeve water waste heat power generation is realized.
4. The coal mine gas internal combustion generator waste heat comprehensive utilization system according to claim 3, characterized in that: the cooling tower and the cooling water pump are also included;
the condenser and the ORC condenser form respective cooling water circulation loops through a cooling tower and a cooling water pump.
5. The coal mine gas internal combustion generator waste heat comprehensive utilization system according to claim 3, characterized in that: and the water pipe is provided with a regulating valve for controlling the flow of the cylinder liner water supplied to the ORC unit by the cylinder liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023218457.XU CN214403791U (en) | 2020-12-28 | 2020-12-28 | Waste heat comprehensive utilization system of coal mine gas internal combustion generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023218457.XU CN214403791U (en) | 2020-12-28 | 2020-12-28 | Waste heat comprehensive utilization system of coal mine gas internal combustion generator |
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| CN214403791U true CN214403791U (en) | 2021-10-15 |
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| CN202023218457.XU Active CN214403791U (en) | 2020-12-28 | 2020-12-28 | Waste heat comprehensive utilization system of coal mine gas internal combustion generator |
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