CN111237082B - Waste heat recovery device of gas generator set - Google Patents
Waste heat recovery device of gas generator set Download PDFInfo
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- CN111237082B CN111237082B CN202010059992.0A CN202010059992A CN111237082B CN 111237082 B CN111237082 B CN 111237082B CN 202010059992 A CN202010059992 A CN 202010059992A CN 111237082 B CN111237082 B CN 111237082B
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- 239000007789 gas Substances 0.000 title claims abstract description 52
- 239000002918 waste heat Substances 0.000 title claims abstract description 23
- 238000011084 recovery Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 200
- 238000004891 communication Methods 0.000 claims abstract description 46
- 238000002156 mixing Methods 0.000 claims abstract description 40
- 238000004364 calculation method Methods 0.000 claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 23
- 239000003546 flue gas Substances 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/16—Other apparatus for heating fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
- F28D21/001—Recuperative heat exchangers the heat being recuperated from exhaust gases for thermal power plants or industrial processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/004—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for engine or machine cooling systems
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
The invention provides a waste heat recovery device of a gas generator set, wherein if the temperature T1 detected by a first temperature sensor is less than a first standard temperature T01, a controller controls a reversing valve to be communicated with a second pipeline firstly, the communication time is preset time K0, after K0 time, the controller controls the reversing valve to be communicated with a third pipeline, and the communication time is K1; after K1 time, the controller controls the reversing valve to be communicated with the second pipeline again; when water is fed into the mixing device, the controller controls the third electric control valve to be opened, the cold water supply device supplies cold water into the mixing device, and the cold water quantity Q supplied by the mixing device each time Cold 1 The calculation method of (c) is as follows: q Cold 1 V1S1K1, where V1 is the flow rate on the first conduit, S1 is the cross-sectional area of the first conduit, and K1 is the single communication time for the diverter valve to communicate with the third conduit; when the controller controls the third electric control valve to be opened, the controller simultaneously controls the second electric control valve to be opened, and the cold water supply device supplies cold water to the heat exchanger.
Description
Technical Field
The invention relates to the technical field of gas power generation, in particular to a waste heat recovery device of a gas generator set.
Background
At present, a gas generator set is widely applied, and then, the generation of gas is only performed under the fermentation and decomposition actions of various microorganisms under certain temperature, humidity, pH value and anaerobic conditions, so that certain requirements are required on the temperature, and the gas tank is heated at lower external temperature, particularly in winter. Then, on the other hand, only about 35% of the energy produced by the gas is converted into electrical energy. About 30% of the rest of the waste heat is discharged along with tail gas, and 25% of the waste heat is taken away by engine cooling water, so that a large amount of waste heat can be generated during power generation of the generator set, and the waste heat cannot be effectively utilized at present. To this end, the invention provides a waste heat recovery device of a gas generator set, so as to at least partially solve the problems.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description section. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to overcome the problems in the prior art, the invention provides a waste heat recovery device of a gas generator set, which comprises: the system comprises a gas tank, a gas generator set, a reversing valve, a heat exchanger, a cold water supply device, a mixing device and a flue gas heat exchanger; a water outlet of the cooling system of the gas generator set is connected with the reversing valve through a first pipeline, the reversing valve divides hot water from the first pipeline into two parts, one part of the hot water enters the mixing device from a second pipeline through the reversing valve, and the other part of the hot water enters the flue gas heat exchanger from a third pipeline through the reversing valve; the cold water supply device is arranged above the mixing device, and the heat exchanger is arranged below the mixing device; the cold water supply device is provided with two water outlets, one water outlet of the cold water supply device discharges cold water into the mixing device through a fourth pipeline, and the other water outlet of the cold water supply device is connected with the water inlet of the heat exchanger through a fifth pipeline, so that the cold water supply device inputs cold water into the heat exchanger; the mixing device mixes the hot water from the second pipeline with the cold water from the fourth pipeline, the mixed medium-low temperature water enters the heat exchanger through a sixth pipeline, and the medium-low temperature water is further cooled in the heat exchanger and then enters a water inlet of the cooling system of the gas generator set as new cooling water through a seventh pipeline;
Hot water enters the reversing valve, and the controller controls the working state of the reversing valve according to the difference value between the temperature T1 detected by the first temperature sensor and a prestored first standard temperature T01;
if the temperature T1 detected by the first temperature sensor is less than a first standard temperature T01, the controller controls the reversing valve to be communicated with the second pipeline firstly, the communication time is preset time K0, after K0 time, the controller controls the reversing valve to be communicated with the third pipeline, and the communication time is K1; after K1 time, the controller controls the reversing valve to be communicated with the second pipeline again; the controller controls the third electric control valve to be opened every time water is fed into the mixing device, the cold water supply device supplies cold water into the mixing device, and the amount Q of cold water supplied by the mixing device every time Cold 1 The calculation method of (c) is as follows:
Q cold 1 = V1S1K1, where V1 is the flow rate over the first conduit, S1 is the cross-sectional area of the first conduit, and K1 is the single communication time for the diverter valve to communicate with the third conduit;
when the controller controls the third electric control valve to be opened, the controller simultaneously controls the second electric control valve to be opened, and the cold water supply device supplies cold water to the heat exchanger.
Furthermore, the heat exchanger is provided with a heat absorption water inlet, a heat absorption water outlet, a heat release water inlet and a heat release water outlet, the heat absorption water inlet is connected with a fifth pipeline, the heat absorption water outlet is connected with a third pipeline, the heat release water inlet is connected with a sixth pipeline, and the heat release water outlet is connected with a seventh pipeline; cold water enters the heat exchanger through the hot water suction inlet, and medium-low temperature water enters the heat exchanger through the heat release water inlet; the medium-low temperature water exchanges heat with cold water in the heat exchanger, and forms low-temperature water after releasing heat and leaves the heat exchanger through the heat release water outlet; the cold water absorbs heat to form medium-temperature water, and the medium-temperature water leaves the heat exchanger through the heat absorption water outlet.
Furthermore, the third pipeline is also connected with the flue gas heat exchanger, medium-temperature water from the heat exchanger and hot water from the reversing valve are mixed in the third pipeline, high-temperature water formed after mixing enters the flue gas heat exchanger, high-temperature water exchanges heat with flue gas from the gas generator set in the flue gas heat exchanger, the high-temperature water absorbs heat from the flue gas to form hot water, and the hot water enters the gas tank to heat gas in the gas tank.
Further, a first electronic control valve is arranged on the first pipeline, a second electronic control valve is arranged on the fifth pipeline, and a third electronic control valve is arranged on the fourth pipeline.
Further, a first temperature sensor is arranged on the first pipeline and used for detecting the temperature T1 on the first pipeline;
a second temperature sensor is arranged on the second pipeline and is used for detecting the temperature T2 on the second pipeline;
a third temperature sensor is arranged on the seventh pipeline and is used for detecting the temperature T3 on the seventh pipeline;
a first flow rate sensor is arranged on the first pipeline and is used for detecting the flow rate V1 on the first pipeline;
a second flow rate sensor is arranged on the second pipeline and is used for detecting the flow rate V2 on the second pipeline;
a third flow rate sensor is arranged on the third pipeline and is used for detecting a flow rate V3 on the third pipeline;
a fourth flow rate sensor is arranged on the fourth pipeline and is used for detecting the flow rate V4 on the fourth pipeline;
a fifth flow rate sensor is provided on the fifth conduit to detect a flow rate V5 on the fifth conduit.
Further, the cold water supply device supplies cold water quantity Q to the heat exchanger every time Cold 2 The calculation method of (c) is as follows:
Q cold 2 = V1S1K0, where V1 is the flow velocity over the first pipe and S1 is the cross-section of the first pipeK0 is the single communication time for the directional valve to communicate with the second conduit 82.
Further, the controller is also stored with a parameter temperature Tc; if the temperature T1 detected by the first temperature sensor is greater than a first standard temperature T01, the controller controls the reversing valve to be communicated with the second pipeline firstly, the communication time is (1-m) K0 (m is a parameter), after the (1-m) K0 time, the controller controls the reversing valve to be communicated with the third pipeline, and the communication time is (K1 + mK 0); after the time (K1 + mK 0), the controller controls the reversing valve to be communicated with the second pipeline again; wherein, the calculation formula of the parameter m is as follows: m =
。
Further, the mixing device supplies cold water quantity Q every time Cold 1 The calculation method of (c) is as follows:
Q cold 1 = V1S1 (K1 + mK 0), where V1 is the flow rate on the first conduit, S1 is the cross-sectional area of the first conduit, and (K1 + mK 0) is the single communication time of the diverter valve with the third conduit;
the cold water quantity Q supplied to the heat exchanger by the cold water supply device each time Cold 2 The calculation method of (c) is as follows:
Q cold 2 = V1S1 (1-m) K0, where V1 is the flow rate on the first conduit, S1 is the cross-sectional area of the first conduit, and (1-m) K0 is the single communication time of the diverter valve with the second conduit.
Further, every preset time, the controller calculates a real-time temperature difference Δ H ', Δ H' = T1-T3, where T1 is the temperature on the first pipeline, T3 is the temperature on the seventh pipeline, and the controller stores a standard temperature difference Δ H; the controller compares the real-time temperature difference delta H 'with the standard temperature difference delta H, and when the real-time temperature difference delta H' is smaller than the standard temperature difference delta H, the controller controls the communication time of the reversing valve and the second pipeline to be (1-m-0.1 n) K0; the controller controls the communication time of the reversing valve and the third pipeline to be (K1 + mK0+0.1 n); wherein n is the number of times that the real-time temperature difference delta H' is smaller than the standard temperature difference delta H.
Further, the diameter of the first pipeline is not equal to that of the second pipeline, and the amount of cold water Q supplied by the mixing device 6 every time Cold 1 =max{Q Cold 1 '，Q Cold 1 ' ' ', wherein,
Q cold 1 ' = V1S1K1, where V1 is the flow rate over the first conduit, S1 is the cross-sectional area of the first conduit, and K1 is the single communication time for the diverter valve to communicate with the third conduit;
Q Cold 1 ' = V1S1 (K1 + K0) — V2S2K0, where V1 is a flow rate on the first conduit, V2 is a flow rate on the second conduit, S1 is a cross-sectional area of the first conduit, S2 is a cross-sectional area of the second conduit, K0 is a single communication time of the direction change valve communicating with the second conduit, and K1 is a single communication time of the direction change valve communicating with the third conduit.
Compared with the prior art, the invention has the following advantages:
the hot water is divided into two parts by arranging the reversing valve, so that part of the hot water discharged by the gas generator set is used for absorbing the heat of the flue gas, and is further used for heating the gas tank; the temperature of the other part of hot water is greatly reduced after the hot water is mixed with cold water through the mixing device, and the hot water is cooled again through the heat exchanger and then is used as cooling water of the gas generator set, so that the cyclic utilization of water resources is realized. The invention is also provided with a controller which controls the working state of each valve by receiving the electric signals transmitted back by the sensor group, so as to further achieve the control effect.
Further, the controller is stored with a parameter temperature Tc, and the communication time is controlled in the controller according to the parameter temperature Tc, the temperature detected by the first temperature sensor and the correlation of the first standard temperature T01, so as to realize accurate control.
Further, the controller calculates a real-time temperature difference Δ H 'every preset time, and compares the real-time temperature difference Δ H' with a standard temperature difference Δ H, thereby adjusting the communication time to realize accurate control.
In conclusion, the waste heat recovery device of the gas generator set provided by the invention has the advantages of simple structure, good use effect and easiness in popularization and use, and the purpose of fully utilizing energy is achieved.
Drawings
In order that the advantages of the invention will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings.
Fig. 1 is a schematic view of the overall structure of an embodiment of the waste heat recovery device of the gas generator set.
Description of reference numerals:
1. a gas tank; 2. a gas generator set; 3. a diverter valve; 4. a heat exchanger; 5. a cold water supply; 6. a mixing device; 7. a flue gas heat exchanger; 81. a first conduit; 82. a second conduit; 83. a third pipeline; 84. a fourth conduit; 85. a fifth pipeline; 86. a sixth pipeline; 87. a seventh pipe; 91. a first electrically controlled valve; 92. a second electrically controlled valve; 93. a third electrically controlled valve.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail so as not to obscure the embodiments of the invention.
In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The following detailed description of preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
In the description of the present invention, the terms "inside", "outside", "longitudinal", "transverse", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the present invention provides a waste heat recovery device of a gas generator set, including: the system comprises a gas tank 1, a gas generator set 2, a reversing valve 3, a heat exchanger 4, a cold water supply device 5, a mixing device 6 and a flue gas heat exchanger 7.
A water outlet of a cooling system of the gas generator set 2 is connected with the reversing valve 3 through a first pipeline 81, the reversing valve 3 divides hot water from the first pipeline 81 into two parts, one part of the hot water enters the mixing device 6 from a second pipeline 82 through the reversing valve 3, and the other part of the hot water enters the flue gas heat exchanger 7 from a third pipeline 83 through the reversing valve 3; a cold water supply device 5 is arranged above the mixing device 6, and a heat exchanger 4 is arranged below the mixing device; the cold water supply device 5 is provided with two water outlets, one water outlet of the cold water supply device 5 discharges cold water into the mixing device 6 through a fourth pipeline 84, and the other water outlet of the cold water supply device 5 is connected with the water inlet of the heat exchanger 4 through a fifth pipeline 85, so that the cold water supply device 5 inputs cold water into the heat exchanger 4; the mixing device 6 mixes the hot water from the second pipeline 82 with the cold water from the fourth pipeline 84, the mixed medium-low temperature water enters the heat exchanger 4 through the sixth pipeline 86, and the medium-low temperature water is further cooled in the heat exchanger 4 and then enters the water inlet of the cooling system of the gas generator set 2 through the seventh pipeline 87 as new cooling water.
Specifically, the heat exchanger 4 is provided with a heat absorption water inlet 41, a heat absorption water outlet 42, a heat release water inlet 43 and a heat release water outlet 44, the heat absorption water inlet 41 is connected with a pipeline 85, the heat absorption water outlet 42 is connected with a pipeline 83, the heat release water inlet 43 is connected with a sixth pipeline 86, and the heat release water outlet 44 is connected with a seventh pipeline 87; cold water enters the heat exchanger 4 through the heat absorption water inlet 41, and medium-low temperature water enters the heat exchanger 4 through the heat release water inlet 43; the medium and low temperature water exchanges heat with cold water in the heat exchanger 4, and the medium and low temperature water forms low temperature water after releasing heat and leaves the heat exchanger 4 through a hot water releasing outlet 44; the cold water absorbs heat to form medium temperature water, and the medium temperature water leaves the heat exchanger 4 through the heat absorption water outlet 42.
Specifically, the third pipeline 3 is further connected with a flue gas heat exchanger 7, medium-temperature water from the heat exchanger 4 and hot water from the reversing valve 3 are mixed in the third pipeline 83, the mixed high-temperature water enters the flue gas heat exchanger 7, the high-temperature water exchanges heat with flue gas from the gas generator in the flue gas heat exchanger 7, the high-temperature water absorbs heat from the flue gas to form hot water, and the hot water enters the gas tank 1 to heat the gas therein.
In some embodiments of the invention, each pipe connection is flanged. Through flange joint, not only connect convenient and fast, also safe and reliable is convenient for change simultaneously. The types of heat exchangers 4 include, but are not limited to, U-tube heat exchangers, submerged coil heat exchangers, shell and tube heat exchangers, spiral plate heat exchangers, and trickle heat exchangers.
With continued reference to fig. 1, the present invention further includes an electronic control valve assembly and a sensor assembly; the electric control valves comprise a first electric control valve 91, a second electric control valve 92 and a third electric control valve 93;
a first electronic control valve 91 is provided on the first pipe 81, a second electronic control valve 92 is provided on the fifth pipe 85, a third electronic control valve 93 is provided on the fourth pipe 84, and a controller (not shown) controls the operating states of the first electronic control valve 91, the second electronic control valve 92, and the third electronic control valve 93.
The sensor group (not shown in the figure) comprises: a first temperature sensor provided on the first pipe 81, the first temperature sensor being configured to detect a temperature T1 on the first pipe 81; a second temperature sensor provided on the second duct 82, the second temperature sensor being configured to detect a temperature T2 on the second duct 82; a third temperature sensor provided on the seventh duct 87, the third temperature sensor being configured to detect a temperature T3 on the seventh duct 87; a first flow rate sensor provided on the first pipe 81, the first flow rate sensor being configured to detect a flow rate V1 on the first pipe 81; a first flow rate sensor provided on the first pipe 81, the first flow rate sensor being configured to detect a flow rate V1 on the first pipe 81; a second flow rate sensor provided on the second pipe 82, the second flow rate sensor being configured to detect a flow rate V2 on the second pipe 82; a third flow rate sensor provided on the third duct 83, the third flow rate sensor being configured to detect a flow rate V3 on the third duct 83; a fourth flow rate sensor provided on the fourth pipe 84, the fourth flow rate sensor being configured to detect a flow rate V4 on the fourth pipe 84; and a fifth flow rate sensor provided on the fifth pipe 85, the fifth flow rate sensor being configured to detect a flow rate V5 on the fifth pipe 85.
The controller receives the electric signals transmitted back by the sensor group, and controls the working state of each electric control valve according to the temperature and the flow rate of water flow in each pipeline reflected in the electric signals.
Hot water is introduced into the direction valve 3, and the controller controls the operation state of the direction valve 3 according to the difference between the temperature T1 detected by the first temperature sensor and the pre-stored first standard temperature T01.
Specifically, if the temperature T1 detected by the first temperature sensor is less than the first standard temperature T01, the controller controls the reversing valve 3 to be communicated with the second pipeline 82 firstly, the communication time is preset time K0, after K0 time, the controller controls the reversing valve 3 to be communicated with the third pipeline 83, and the communication time is K1; after time K1, the control unit controls the switching valve 3 to again communicate with the second line 82. When water is fed into the mixing device 6, the controller controls the third electric control valve 93 to be opened, the cold water supply device 5 supplies cold water into the mixing device 6, and the amount Q of cold water supplied by the mixing device 6 every time Cold 1 The calculation method of (c) is as follows:
Q cold 1 = V1S1K1 where V1 is the flow rate on the first pipe 81, S1 is the cross-sectional area of the first pipe 81, and K1 is the single communication time for which the direction valve 3 communicates with the third pipe 83.
When the controller controls the third electronic control valve 93 to be opened, the controller simultaneously controls the second electronic control valve 92 to be opened, and the cold water supply device 5 supplies cold water to the heat exchanger 4; in some embodiments of the invention, the cold water supply device 5 supplies the heat exchanger 4 with a quantity of cold water Q each time Cold 2 The calculation method of (c) is as follows:
Q cold 2 = V1S1K0 where V1 is the flow rate on the first pipe 81, S1 is the cross-sectional area of the first pipe 81, and K0 is the single communication time for which the direction valve 3 communicates with the second pipe 82.
Specifically, the controller also stores a parameter temperature Tc; if the temperature T1 detected by the first temperature sensor is greater than the first standard temperature T01, the controller controls the reversing valve 3 to be communicated with the second pipeline 82 firstly, the communication time is (1-m) K0 (m is a parameter), after the (1-m) K0 time, the controller controls the reversing valve 3 to be communicated with the third pipeline 83, and the communication time is (K1 + mK 0); after the time (K1 + mK 0) has elapsed, the controller controls the selector valve 3 to communicate again with the second line 82. Wherein, the calculation formula of the parameter m is as follows: m =
(ii) a Correspondingly, the quantity Q of cold water supplied by the mixing device 6 at a time Cold 1 The calculation method of (c) is as follows:
Q cold 1 = V1S1 (K1 + mK 0), where V1 is the flow rate on the first pipe 81, S1 is the cross-sectional area of the first pipe 81, and (K1 + mK 0) is the single communication time for which the selector valve 3 communicates with the third pipe 83; cold water quantity Q supplied by cold water supply device 5 to heat exchanger 4 each time Cold 2 The calculation method of (c) is as follows:
Q cold 2 = V1S1 (1-m) K0 where V1 is the flow rate on the first conduit 81, S1 is the cross sectional area of the first conduit 81, and (1-m) K0 is the single communication time for the diverter valve 3 to communicate with the second conduit 82.
Specifically, the controller calculates a real-time temperature difference Δ H ', Δ H' = T1-T3 every preset time, where T1 is the temperature on the first pipeline 81, and T3 is a standard temperature difference Δ H stored in the temperature controller on the seventh pipeline 87; the controller compares the real-time temperature difference delta H 'with the standard temperature difference delta H, and when the real-time temperature difference delta H' is smaller than the standard temperature difference delta H, the controller controls the communication time of the reversing valve 3 and the second pipeline 82 to be preset time (1-m-0.1 n) K0; the controller controls the communication time of the reversing valve 3 and the third pipeline 83 to be (K1 + mK0+0.1 n); wherein n is the number of times that the real-time temperature difference delta H' is smaller than the standard temperature difference delta H. For example, the controller has calculated 5 real-time temperature differences, wherein 3 real-time temperature differences Δ H' are less than the standard temperature difference Δ H, and before the controller calculates the 6 th real-time temperature difference, the controller controls the communication time of the reversing valve 3 and the second pipeline 82 to be the preset time (1-m-0.5) K0; the controller controls the communication time of the change valve 3 and the third pipe 83 to be (K1 + mK0+ 0.5).
In the above embodiment of the present invention, the diameters of the pipes are all equal; in other embodiments of the invention, the diameter of the first conduit 81 and the diameter of the second conduit 82 are not equal, in which case the mixing device 6 supplies an amount of cold water Q each time Cold 1 =max{Q Cold 1 '，Q Cold 1 ' ' ', wherein,
Q cold 1 ' = V1S1K1 where V1 is the flow rate on the first conduit 81, S1 is the cross-sectional area of the first conduit 81, and K1 is the single communication time for which the diverter valve 3 communicates with the third conduit 83.
Q Cold 1 ' = V1S1 (K1 + K0) — V2S2K0, where V1 is the flow rate on the first conduit 81, V2 is the flow rate on the second conduit 82, S1 is the cross-sectional area of the first conduit 81, S2 is the cross-sectional area of the second conduit 82, K0 is the single communication time when the diverter valve 3 communicates with the second conduit 82, and K1 is the single communication time when the diverter valve 3 communicates with the third conduit 83.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "component" and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. It will be appreciated by those skilled in the art that many variations and modifications may be made to the teachings of the invention, which fall within the scope of the invention as claimed.
Claims (10)
1. The utility model provides a waste heat recovery device of gas generating set which characterized in that includes: the system comprises a gas tank, a gas generator set, a reversing valve, a heat exchanger, a cold water supply device, a mixing device and a flue gas heat exchanger; a water outlet of the cooling system of the gas generator set is connected with the reversing valve through a first pipeline, the reversing valve divides hot water from the first pipeline into two parts, one part of the hot water enters the mixing device from a second pipeline through the reversing valve, and the other part of the hot water enters the flue gas heat exchanger from a third pipeline through the reversing valve; the cold water supply device is arranged above the mixing device, and the heat exchanger is arranged below the mixing device; the cold water supply device is provided with two water outlets, one water outlet of the cold water supply device discharges cold water into the mixing device through a fourth pipeline, and the other water outlet of the cold water supply device is connected with the water inlet of the heat exchanger through a fifth pipeline, so that the cold water supply device inputs cold water into the heat exchanger; the mixing device mixes the hot water from the second pipeline with the cold water from the fourth pipeline, the mixed medium-low temperature water enters the heat exchanger through a sixth pipeline, and the medium-low temperature water is further cooled in the heat exchanger and then enters a water inlet of the cooling system of the gas generator set as new cooling water through a seventh pipeline;
Hot water enters the reversing valve, and the controller controls the working state of the reversing valve according to the difference between the temperature T1 detected by the first temperature sensor and a pre-stored first standard temperature T01;
if the temperature T1 detected by the first temperature sensor is less than a first standard temperature T01, the controller controls the reversing valve to be communicated with the second pipeline firstly, and the communication time isThe preset time is K0, after the K0 time elapses, the controller controls the reversing valve to be communicated with the third pipeline, and the communication time is K1; after K1 time, the controller controls the reversing valve to be communicated with the second pipeline again; the controller controls the third electric control valve to be opened every time water is fed into the mixing device, the cold water supply device supplies cold water into the mixing device, and the amount Q of cold water supplied by the mixing device every time Cold 1 The calculation method of (c) is as follows:
Q cold 1 = V1S1K1, where V1 is the flow rate over the first conduit, S1 is the cross-sectional area of the first conduit, and K1 is the single communication time for the diverter valve to communicate with the third conduit;
when the controller controls the third electric control valve to be opened, the controller simultaneously controls the second electric control valve to be opened, and the cold water supply device supplies cold water to the heat exchanger.
2. The waste heat recovery device of the gas generator set according to claim 1, wherein the heat exchanger is provided with a hot water suction inlet, a hot water suction outlet, a hot water discharge inlet and a hot water discharge outlet, the hot water suction inlet is connected with a fifth pipeline, the hot water suction outlet is connected with a third pipeline, the hot water discharge inlet is connected with a sixth pipeline, and the hot water discharge outlet is connected with a seventh pipeline; cold water enters the heat exchanger through the hot water suction inlet, and medium-low temperature water enters the heat exchanger through the hot water discharge inlet; the medium-low temperature water exchanges heat with cold water in the heat exchanger, and forms low-temperature water after releasing heat and leaves the heat exchanger through the heat release water outlet; the cold water absorbs heat to form medium-temperature water, and the medium-temperature water leaves the heat exchanger through the heat absorption water outlet.
3. The waste heat recovery device of the gas generator set according to claim 2, wherein the third pipeline is further connected to the flue gas heat exchanger, the medium temperature water from the heat exchanger and the hot water from the reversing valve are mixed in the third pipeline, the mixed high temperature water enters the flue gas heat exchanger, the high temperature water exchanges heat with the flue gas from the gas generator set in the flue gas heat exchanger, the high temperature water absorbs heat from the flue gas to form hot water, and the hot water enters the gas tank to heat the gas therein.
4. The waste heat recovery device of the gas generator set according to claim 3, wherein a first electrically controlled valve is disposed on the first pipeline, the second electrically controlled valve is disposed on the fifth pipeline, and a third electrically controlled valve is disposed on the fourth pipeline.
5. The waste heat recovery device of the gas generator set according to claim 4, wherein a first temperature sensor is arranged on the first pipeline and used for detecting the temperature T1 on the first pipeline;
a second temperature sensor is arranged on the second pipeline and is used for detecting the temperature T2 on the second pipeline;
a third temperature sensor is arranged on the seventh pipeline and is used for detecting the temperature T3 on the seventh pipeline;
a first flow rate sensor is arranged on the first pipeline and is used for detecting the flow rate V1 on the first pipeline;
a second flow rate sensor is arranged on the second pipeline and is used for detecting the flow rate V2 on the second pipeline;
a third flow rate sensor is arranged on the third pipeline and is used for detecting a flow rate V3 on the third pipeline;
a fourth flow rate sensor is arranged on the fourth pipeline and is used for detecting the flow rate V4 on the fourth pipeline;
A fifth flow rate sensor is provided on the fifth conduit to detect a flow rate V5 on the fifth conduit.
6. The waste heat recovery device of the gas generator set according to claim 5, wherein the cold water supply device supplies cold water Q to the heat exchanger every time Cold 2 In a manner such asThe following:
Q cold 2 = V1S1K0, where V1 is the flow rate on the first conduit, S1 is the cross-sectional area of the first conduit, and K0 is the single communication time for the diverter valve to communicate with the second conduit 82.
7. The waste heat recovery device of the gas generator set as claimed in claim 6, wherein the controller further stores therein a parameter temperature Tc; if the temperature T1 detected by the first temperature sensor is greater than a first standard temperature T01, the controller controls the reversing valve to be communicated with the second pipeline firstly, the communication time is (1-m) K0 (m is a parameter), after the (1-m) K0 time, the controller controls the reversing valve to be communicated with the third pipeline, and the communication time is (K1 + mK 0); after the time (K1 + mK 0), the controller controls the reversing valve to be communicated with the second pipeline again; wherein, the calculation formula of the parameter m is as follows: m = 
。
8. The waste heat recovery device of the gas generator set according to claim 7, wherein the mixing device supplies cold water Q each time Cold 1 The calculation method of (c) is as follows:
Q cold 1 = V1S1 (K1 + mK 0), where V1 is the flow rate on the first conduit, S1 is the cross-sectional area of the first conduit, and (K1 + mK 0) is the single communication time of the diverter valve with the third conduit;
the cold water quantity Q supplied to the heat exchanger by the cold water supply device each time Cold 2 The calculation method of (c) is as follows:
Q cold 2 = V1S1 (1-m) K0, where V1 is the flow rate on the first conduit, S1 is the cross-sectional area of the first conduit, and (1-m) K0 is the single communication time of the diverter valve with the second conduit.
9. The waste heat recovery device of the gas generator set according to claim 6, wherein the controller calculates a real-time temperature difference Δ H ', Δ H' = T1-T3, where T1 is a temperature on the first pipeline, T3 is a temperature on the seventh pipeline, and the controller stores a standard temperature difference Δ H; the controller compares the real-time temperature difference delta H 'with the standard temperature difference delta H, and when the real-time temperature difference delta H' is smaller than the standard temperature difference delta H, the controller controls the communication time of the reversing valve and the second pipeline to be (1-m-0.1 n) K0; the controller controls the communication time of the reversing valve and the third pipeline to be (K1 + mK0+0.1 n); wherein n is the number of times that the real-time temperature difference delta H' is smaller than the standard temperature difference delta H.
10. The waste heat recovery device of the gas generator set according to claim 6, wherein the diameter of the first pipeline is not equal to the diameter of the second pipeline, and the amount of cold water Q supplied by the mixing device 6 per time is not equal to the amount of cold water Q supplied by the mixing device Cold 1 =max{Q Cold 1 '，Q Cold 1 ' ' ', wherein,
Q cold 1 ' = V1S1K1, where V1 is the flow rate over the first conduit, S1 is the cross-sectional area of the first conduit, and K1 is the single communication time for the diverter valve to communicate with the third conduit;
Q cold 1 ' = V1S1 (K1 + K0) — V2S2K0, where V1 is a flow rate on the first conduit, V2 is a flow rate on the second conduit, S1 is a cross-sectional area of the first conduit, S2 is a cross-sectional area of the second conduit, K0 is a single communication time of the direction change valve communicating with the second conduit, and K1 is a single communication time of the direction change valve communicating with the third conduit.
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