Waste heat utilization device of gas generator set

Abstract

The utility model discloses a waste heat utilization device of a gas generator set, which comprises a boiler provided with a water inlet and a water outlet. The heat exchange assembly comprises a first pipeline, a first heat exchanger, a second pipeline, a second heat exchanger and a third pipeline, the first pipeline is used for guiding low-temperature water to one end of the first heat exchanger, the other end of the first heat exchange pipe communicates with one end of the second pipeline, and the other end of the second pipeline communicates with one end of the second heat exchanger; the other end of the second heat exchanger communicates with one end of the third pipeline, and the other end of the third pipeline communicates with the water inlet. According to the waste heat utilization device of the fuel gas heating unit, the first heat exchanger and the second heat exchanger are arranged to achieve two times of heat exchange and then enter the boiler, and the waste heat utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery and utilization, in particular to a waste heat utilization device for a gas-fired generator set. Background Art

[0002] At present, waste heat generated by industrial activities not only wastes energy, but also has a negative impact on the environment. As an effective means of energy conservation, waste heat utilization has attracted much attention. With the continuous development of technology, waste heat utilization technology has been continuously innovated and improved, making the use of waste heat more efficient, reliable and economical, which can significantly reduce production costs, while also reducing greenhouse gas emissions and alleviating environmental pressure.

[0003] Gas generator sets mainly use natural gas or harmful gases as fuel, generate heat energy through combustion, and then convert it into electricity. Utilization of waste heat (partial gas turbine): The high-temperature gas discharged from the gas turbine can enter the waste heat boiler, and the high-temperature exhaust gas is used to heat the water in the boiler, and the hot water is exported for heating or hot water equipment. How to improve the utilization rate of waste heat needs to be solved urgently. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a waste heat utilization device for a gas heating unit, which realizes two heat exchanges and then enters the boiler by setting a first heat exchanger and a second heat exchanger, thereby improving the waste heat utilization rate.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A waste heat utilization device for a gas-fired generator set, comprising:

[0007] A boiler, wherein the boiler is provided with a water inlet and a water outlet;

[0008] A heat exchange assembly includes a first pipe, a first heat exchanger, a second pipe, a second heat exchanger and a third pipe, wherein the first pipe is used to guide low-temperature water to one end of the first heat exchanger, the other end of the first heat exchange pipe is connected to one end of the second pipe, the other end of the second pipe is connected to one end of the second heat exchanger, the other end of the second heat exchanger is connected to one end of the third pipe, and the other end of the third pipe is connected to the water inlet.

[0009] Furthermore, the first heat exchanger and the second heat exchanger are both plate heat exchangers.

[0010] Furthermore, a first connector is provided on the first pipeline, and the first connector is installed on the first heat exchanger through a flange.

[0011] Furthermore, both ends of the second pipeline are provided with second connectors, and the two second connectors of the second pipeline are respectively connected to the first heat exchanger and the second heat exchanger through flanges.

[0012] Furthermore, both ends of the third pipeline are provided with third connectors, and the two third connectors of the third pipeline are respectively connected to the second heat exchanger and the boiler through flanges.

[0013] Furthermore, the water outlet is connected with a diversion pipe.

[0014] Furthermore, the first heat exchanger is also connected to a first water inlet pipe and a first water outlet pipe.

[0015] Furthermore, the second heat exchanger is also connected to a second water inlet pipe and a second water outlet pipe.

[0016] Compared with the prior art, the beneficial effect of the utility model is that the cold water is heat exchanged twice by the first heat exchanger and the second heat exchanger and then enters the boiler for heating. Compared with directly heating the cold water, the boiler heats the hot water after two heat exchanges, which can reduce the heat required for heating in the boiler and save resources.

[0017] In addition, the first heat exchanger and the second heat exchanger perform heat exchange twice with the cooling water in different parts of the gas generator set, respectively, to cool the waste heat in the water in stages, and gradually heat the water by heat exchange to improve the heat recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the installation structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the waste heat utilization device of the utility model.

[0020] In the figure: 1, rack; 2, low-temperature water pipeline of gas generator set; 3, high-temperature water pipeline of gas generator set; 4, boiler; 5, first heat exchanger; 6, second heat exchanger; 7, first water outlet pipe; 8, first water inlet pipe; 9, first pipeline; 10, second pipeline; 11, second water inlet pipe; 12, second water outlet pipe; 13, third pipeline; 14, third water inlet pipe; 15, diverter pipe. DETAILED DESCRIPTION

[0021] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0024] like Figure 1 as well as Figure 2 The waste heat utilization device of a gas generator set shown includes a frame 1, a boiler 4 and a heat exchange component. The boiler 4 and the heat exchange component are installed on the frame 1 of the gas generator set, and the boiler 4 is provided with a water inlet and a water outlet.

[0025] The specific heat exchange component includes a first pipe 9, a first heat exchanger 5, a second pipe 10, a second heat exchanger 6 and a third pipe 13. The first pipe 9 is used to guide low-temperature water to one end of the first heat exchanger 5, the other end of the first heat exchange pipe is connected to one end of the second pipe 10, the other end of the second pipe 10 is connected to one end of the second heat exchanger 6, the other end of the second heat exchanger 6 is connected to one end of the third pipe 13, and the other end of the third pipe 13 is connected to the water inlet.

[0026] On the basis of the above structure, when the waste heat utilization device of the gas generator set of the utility model is used, when in use, the above-mentioned boiler 4 can introduce cold water into the boiler 4 through the third water inlet pipe 14, and the water in the boiler 4 can enter the first heat exchanger 5 through the first pipe 9, and the hot water in the first heat exchanger 5 performs the first heat exchange, at this time, the cold water can be heated for the first time, that is, the cold water is preliminarily heated, and then the preliminarily heated water can enter the second heat exchanger 6 through the second pipe 10, and the hot water in the second heat exchanger 6 is heated for the second time, and the preliminarily heated water is heated twice. At this time, the hot water exported from the second heat exchanger 6 has been heated twice, and then enters the boiler 4 through the third pipe 13 to complete the last heating, which can reduce the heating of the boiler 4 and save resources, and the heated water in the boiler can be used for heating systems or hot water equipment, etc., thereby improving thermal efficiency.

[0027] In this way, the cold water is heat exchanged twice by the first heat exchanger 5 and the second heat exchanger 6 before entering the boiler 4 for heating. Compared with directly heating the cold water, the boiler 4 heats the hot water after two heat exchanges, which can reduce the heat required for heating in the boiler 4 and save resources.

[0028] It should be noted that the gas generator set in the prior art includes a cooling system, and there are two sets of cooling pipes for cooling different positions of the generator set, one of which is used to cool and dissipate heat from high-speed rotating high-temperature components such as the stator and rotor of the generator, thereby ensuring the normal operation and life of the generator. Therefore, this set of cooling pipes will form high-temperature water after cooling.

[0029] The other set of cooling pipes will be used to dissipate heat from components with lower heat generation, such as generator bearings and sealing devices, to reduce the heat generated by friction and ensure the life of bearings and sealing rings. After cooling, this set of cooling pipes will form low-temperature water.

[0030] Furthermore, in this embodiment, the first heat exchanger 5 is also connected to a first water inlet pipe 8 and a first water outlet pipe 7. The first water inlet pipe 8 of the first heat exchanger 5 is connected to the low-temperature water pipeline 2 of the gas generator set, and the first water outlet pipe 7 can be connected to the cooling water circuit of the gas generator set, so that the first heat exchanger 5 can guide the low-temperature water and the cold water to perform preliminary heat exchange, and use the low-temperature water waste heat of the generator set to heat the cold water for the first time, thereby improving the waste heat utilization rate. The low-temperature water after heat exchange returns to the corresponding cooling pipeline to dissipate heat again, and the cycle is repeated to utilize the low-temperature waste heat of the generator set.

[0031] That is, the first heat exchanger and the second heat exchanger perform heat exchange twice with the cooling water in different parts of the gas generator set respectively, that is, the cooling water that absorbs the waste heat from different positions of the gas generator set is heated twice with the heating water in the first heat exchanger and the second heat exchanger, the waste heat in the cooling water is cooled in stages, and the water is gradually heated by heat exchange to improve the heat recovery efficiency.

[0032] Furthermore, the second heat exchanger 6 is also connected to a second water inlet pipe 11 and a second water outlet pipe 12. The second water inlet pipe 11 of the second heat exchanger 6 is connected to the high-temperature water pipeline 3 of the gas generator set, and the second water outlet pipe 12 can be connected to the cooling water circuit of the gas generator set, so that the second heat exchanger 6 can guide the high temperature and preheated water to perform a second heat exchange, and use the waste heat of the high-temperature water of the generator set to heat the preheated water for the second time, thereby improving the waste heat utilization rate. The high-temperature water after heat exchange returns to the corresponding cooling pipeline to dissipate heat again, and the cycle is repeated to utilize the high-temperature waste heat of the generator set.

[0033] Furthermore, the first heat exchanger 5 and the second heat exchanger 6 can both be selected as existing plate heat exchangers with large heat exchange area and high heat exchange efficiency.

[0034] Furthermore, a first connecting head is provided on the first pipeline 9, and the first connecting head is installed on the first heat exchanger 5 through a flange. In this way, the flange can be installed on the outside of the first connecting head, and the flange can be assembled with the first heat exchanger 5 through bolts to improve the connection surface, and the assembly structure of the first pipeline 9 is stable.

[0035] Furthermore, second connectors are provided at both ends of the second pipe 10, and the two second connectors of the second pipe 10 are respectively connected to the first heat exchanger 5 and the second heat exchanger 6 through flanges. Similarly, the second connectors of the second pipe 10 are respectively assembled with the first heat exchanger 5 and the second heat exchanger 6 through bolts through flanges to improve the connection surface, and the assembly structure of the second pipe 10 is stable.

[0036] Further, both ends of the third pipeline 13 are provided with third connectors, and the two third connectors of the third pipeline 13 are respectively connected to the second heat exchanger 6 and the boiler 4 through flanges. The two third connectors of the third pipeline 13 are respectively connected to the second heat exchanger 6 and the boiler 4 through flanges. Similarly, the third connectors of the third pipeline 13 are respectively assembled with the second heat exchanger 6 and the boiler 4 through bolts through the flanges, so as to improve the connection surface and stabilize the assembly structure of the third pipeline 13.

[0037] The first connector, the second connector and the third connector can all be selected as pipe connectors in the prior art.

[0038] Furthermore, the water outlet is connected with a shunt pipe 15 , so that the hot water in the boiler 4 can be guided to various hot water devices or heating systems through the shunt pipe 15 , thereby improving the utilization rate of the hot water in the boiler 4 .

[0039] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the utility model.

Claims

1. A waste heat utilization device for a gas-fired generator set, characterized in that: include, A boiler, wherein the boiler is provided with a water inlet and a water outlet; A heat exchange component includes a first pipe, a first heat exchanger, a second pipe, a second heat exchanger and a third pipe, wherein the first pipe is used to guide low-temperature water to one end of the first heat exchanger, the other end of the first heat exchanger is connected to one end of the second pipe, the other end of the second pipe is connected to one end of the second heat exchanger, the other end of the second heat exchanger is connected to one end of the third pipe, and the other end of the third pipe is connected to the water inlet.

2. The waste heat utilization device of a gas-fired generator set according to claim 1, characterized in that: The first heat exchanger and the second heat exchanger are both plate heat exchangers.

3. The waste heat utilization device of a gas-fired generator set according to claim 1, characterized in that: The first pipeline is provided with a first connector, and the first connector is installed on the first heat exchanger through a flange.

4. The waste heat utilization device of a gas-fired generator set according to claim 3, characterized in that: Both ends of the second pipeline are provided with second connectors, and the two second connectors of the second pipeline are respectively connected to the first heat exchanger and the second heat exchanger through flanges.

5. The waste heat utilization device of a gas-fired generator set according to claim 4, characterized in that: Both ends of the third pipeline are provided with third connectors, and the two third connectors of the third pipeline are respectively connected to the second heat exchanger and the boiler through flanges.

6. The waste heat utilization device of a gas-fired generator set according to any one of claims 1 to 5, characterized in that: The water outlet is connected with a diversion pipe.

7. The waste heat utilization device of a gas-fired generator set according to any one of claims 1 to 5, characterized in that: The first heat exchanger is also connected to a first water inlet pipe and a first water outlet pipe.

8. The waste heat utilization device of a gas-fired generator set according to any one of claims 1 to 5, characterized in that: The second heat exchanger is also connected to a second water inlet pipe and a second water outlet pipe.

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