CN213119023U - Flue gas waste heat recovery system of gas generator set - Google Patents
Flue gas waste heat recovery system of gas generator set Download PDFInfo
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- CN213119023U CN213119023U CN202021352776.7U CN202021352776U CN213119023U CN 213119023 U CN213119023 U CN 213119023U CN 202021352776 U CN202021352776 U CN 202021352776U CN 213119023 U CN213119023 U CN 213119023U
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Abstract
The application relates to a gas generating set flue gas waste heat recovery system belongs to gas generating set technical field, include: the gas generator set comprises a gas engine and a generator, and an output shaft of the gas engine is coaxially connected with an input shaft of the generator; the system comprises a flue gas waste heat recovery unit, a fuel gas waste heat recovery unit and a fuel gas waste heat recovery unit, wherein the flue gas waste heat recovery unit comprises an electric three-way valve, a steam generator, an economizer and a silencer which are sequentially connected, an inlet of the electric three-way valve is connected with a smoke exhaust pipe of a gas engine, a flue gas outlet of the steam generator is connected with a flue gas inlet of the economizer through a flange, and a water outlet of the economizer is connected with a water inlet of the steam generator; and the softened water supply unit is used for supplying softened water to the steam generator and the economizer. The system has the advantages of compact structure, reasonable design, low manufacturing and installation cost, continuous twice waste heat recovery of the flue gas of the gas generator set, and effective improvement of the waste heat utilization rate.
Description
Technical Field
The application relates to the technical field of gas generator sets, in particular to a flue gas waste heat recovery system of a gas generator set.
Background
The gas generating set can produce a large amount of flue gas in the course of working, the exhaust gas temperature is above 300 ℃, these heats are not discharged to the air directly through utilizing, not only waste to the waste heat resource of flue gas itself, and, can cause the environmental heat to pollute because of the temperature rise near the exhaust port.
At present, in order to recover the flue gas waste heat of a gas generator set, some heat recovery devices are also installed on the gas generator set, but the heat recovery devices in the prior art are single in structure and function, and can only simply recover the heat generated by waste gas, but the flue gas recovery utilization rate of the heat recovery devices is insufficient, the residual heat in the flue gas is directly discharged, and the part of heat is not effectively utilized, or a heat dissipation device needs to be added for cooling, so that the heat efficiency of the whole system is low.
Disclosure of Invention
The embodiment of the application provides a gas generating set flue gas waste heat recovery system to solve heat recovery device's among the prior art flue gas recycle rate not enough, remaining heat direct emission in the flue gas leads to partial heat not being utilized effectively not enough.
The embodiment of the application provides a gas generating set flue gas waste heat recovery system, includes:
the gas generator set comprises a gas engine and a generator, and an output shaft of the gas engine is coaxially connected with an input shaft of the generator;
the system comprises a flue gas waste heat recovery unit, a gas engine, a gas generator, a coal economizer and a silencer, wherein the flue gas waste heat recovery unit comprises an electric three-way valve, a steam generator, the coal economizer and the silencer which are sequentially connected, an inlet of the electric three-way valve is connected with a smoke exhaust pipe of the gas engine, a flue gas outlet of the steam generator is connected with a flue gas inlet of the coal economizer through a flange, and a water outlet of the coal economizer is connected with a water inlet of the steam generator;
a softened water supply unit for supplying softened water to the steam generator and the economizer.
In some embodiments, the softened water supply unit includes a softened condensed water tank and a water supply line, and the softened condensed water tank is connected with the steam generator and the economizer through the water supply line, respectively.
In some embodiments, the water supply pipeline comprises a first water supply branch and a second water supply branch, a first water supply pump is arranged on the first water supply branch, a second water supply pump is arranged on the second water supply branch, water inlets of the first water supply branch and the second water supply branch are connected with the softened condensed water tank, and water outlets of the first water supply branch and the second water supply branch are connected with a water inlet of the economizer together.
In some embodiments, a bypass pipe is further disposed between the water outlets of the first and second water supply branches and the water inlet of the steam generator, a second valve is disposed on the bypass pipe, and a third valve is disposed between the water outlets of the first and second water supply branches and the water inlet of the economizer.
In some embodiments, the softened water inlet and the condensed water inlet are formed in the top of the softened condensed water tank, a floating ball type water valve is arranged in the softened condensed water tank and used for controlling the opening and closing of the softened water inlet and the condensed water inlet, an overflow pipe is arranged on the top of the softened condensed water tank, a drain pipe is arranged on the bottom of the softened condensed water tank, and a first valve is arranged on the drain pipe.
In some embodiments, the steam generator comprises a steam drum and a heat exchanger, the steam drum is fixedly connected with the heat exchanger, the heat exchanger comprises a shell and a heat exchange tube positioned in the shell, the heat exchange tube is positioned below the steam drum and communicated with the steam drum, the shell is further provided with a flue gas inlet and a flue gas outlet, the heat exchange tube is positioned between the flue gas inlet and the flue gas outlet, and the heat exchanger exchanges heat with the steam drum through the heat exchange tube.
In some embodiments, the heat exchange tube comprises a downcomer, a header and an upcomer, the diameter of the downcomer is greater than that of the upcomer, the top of the downcomer and the top of the upcomer are both communicated with the steam drum, the bottom of the downcomer and the bottom of the upcomer are both communicated with the header, and the downcomer, the header and the upcomer are all superconducting heat tubes.
In some embodiments, the economizer comprises a chamber and a water pipe arranged in the chamber, a water inlet and a water outlet are respectively arranged at two ends of the water pipe, the chamber of the economizer is further provided with a flue gas inlet and a flue gas outlet, the water outlet of the water pipe is communicated to the water inlet of the steam generator, a sixth valve is arranged between the water pipe and the water inlet of the steam generator, and the water pipe is a stainless steel pipe.
In some embodiments, the steam generator and the economizer are both provided with a drain pipe, a fourth valve is arranged on the drain pipe, and a cooling and pollution discharge pool is arranged at a water outlet of the drain pipe.
In some embodiments, a steam pipe is arranged at the top of the steam generator, and a fifth valve is arranged on the steam pipe.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a flue gas waste heat recovery system of a gas generator set, and the system is provided with the gas generator set, a flue gas waste heat recovery unit and a softened water supply unit. The flue gas waste heat recovery unit comprises an electric three-way valve, a steam generator, an economizer and a silencer which are sequentially connected, wherein the inlet of the electric three-way valve is connected with the flue gas outlet of the gas engine, and the flue gas outlet of the steam generator is connected with the flue gas inlet of the economizer through a flange. The softened water supply unit is used for supplying softened water to the steam generator and the economizer.
Therefore, the system adopts the flue gas waste heat recovery unit to recover the flue gas waste heat to generate steam, and the heat exchange efficiency of the system is higher than that of a conventional single-structure heat exchanger. The flue gas waste heat recovery unit is arranged between the flues and has small resistance, and the original smoke exhaust system is not influenced. The steam generator and the economizer are connected relatively independently through the flange, and once a fault occurs, the steam generator and the economizer can be independently disassembled, so that the shutdown and the shutdown cannot be caused. The waste gas discharged by the gas generator set enters a steam generator through an electric three-way valve, and is discharged at low temperature through a silencer by a coal economizer, and the temperature of the flue gas can be reduced to be only 10 ℃ higher than the temperature of steam. Softened water of the softened water supply unit firstly enters the economizer, then is converted into a steam-water mixture through heat absorption of the steam generator, and the steam-water mixture is subjected to steam-water separation in the steam drum to form saturated steam. The system has the advantages of compact structure, reasonable design, low manufacturing and installation cost, continuous twice waste heat recovery of the flue gas of the gas generator set, and effective improvement of the waste heat utilization rate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present application;
fig. 2 is a schematic structural view of a steam generator according to an embodiment of the present application.
Reference numerals:
1-a gas generator set, 2-a smoke exhaust pipe, 3-an electric three-way valve, 4-a steam generator, 5-an economizer, 6-a water supply pipeline, 7-a softened condensed water tank, 8-a silencer, 41-a steam drum, 42-a heat exchanger, 43-a heat exchange pipe, 44-a steam pipeline, 45-a water discharge pipe, 46-a fourth valve, 47-a cooling and sewage disposal pool, 48-a fifth valve, 51-a sixth valve, 52-a third valve, 61-a first water supply pump, 62-a second water supply pump, 63-a first water supply branch, 64-a second water supply branch, 65-a bypass pipe, 66-a second valve, 71-a softened water inlet, 72-a condensed water inlet, 73-a floating ball type water valve and 74-an overflow pipe, 75-first valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a gas generating set flue gas waste heat recovery system, and it is not abundant that it can solve heat recovery unit's flue gas recycle rate among the prior art, and surplus heat directly discharges in the flue gas, leads to the problem that partial heat is not utilized effectively.
Referring to fig. 1, an embodiment of the present application provides a flue gas waste heat recovery system for a gas turbine generator system, including:
the gas generator set 1 comprises a gas engine and a generator, wherein an output shaft of the gas engine is coaxially connected with an input shaft of the generator.
The flue gas waste heat recovery unit comprises an electric three-way valve 3, a steam generator 4, an economizer 5 and a silencer 8 which are sequentially connected, wherein an inlet of the electric three-way valve 3 is connected with a smoke exhaust pipe 2 of a gas engine, a flue gas outlet of the steam generator 4 is connected with a flue gas inlet of the economizer 5 through a flange, and a water outlet of the economizer 5 is connected with a water inlet of the steam generator 4.
A softened water supply unit for supplying softened water to the steam generator 4 and the economizer 5.
The system adopts the flue gas waste heat recovery unit to recover the flue gas waste heat of the gas generator set 1 to generate steam, and the heat exchange efficiency of the system is higher than that of a conventional single-structure heat exchanger. The flue gas waste heat recovery unit is arranged between the flues and has small resistance, and the original smoke exhaust system is not influenced. The steam generator 4 and the economizer 5 are connected through flanges and are relatively independent, and once a fault occurs, the steam generator can be independently dismounted, so that the boiler shutdown and the shutdown cannot be caused. The exhaust gas discharged by the gas generator set 1 enters the steam generator 4 through the electric three-way valve 3, the economizer 5 is discharged at low temperature through the muffler 8, and the temperature of the flue gas can be reduced to be only 10 ℃ higher than the temperature of the steam. The softened water of the softened water supply unit 7 firstly enters the economizer 5, and then is converted into a steam-water mixture through the heat absorption of the steam generator 4, and the steam-water mixture is subjected to steam-water separation in the steam generator 4 to form saturated steam. The system has the advantages of compact structure, reasonable design and low manufacturing and installation cost, and can be used for continuously recovering waste heat twice from the flue gas of the gas generator set 1, thereby effectively improving the waste heat utilization rate.
In some optional embodiments, referring to fig. 1, the embodiment of the present application provides a flue gas waste heat recovery system for a gas turbine generator set, and a softened water supply unit 7 of the system includes a softened condensed water tank 7 and a water supply pipe 6, and the softened condensed water tank 7 is connected to a steam generator 4 and an economizer 5 through the water supply pipe 6, respectively.
The water supply pipeline 6 comprises a first water supply branch 63 and a second water supply branch 64, the first water supply branch 63 is used as a main water supply pipeline, the second water supply branch 64 is used as a standby water supply pipeline, and when the first water supply branch 63 breaks down, the second water supply branch 64 is started to supply softened water to the steam generator 4 and the economizer 5, so that the use reliability of the water supply pipeline 6 is improved.
The first water supply branch 63 is provided with a first water supply pump 61, the second water supply branch 64 is provided with a second water supply pump 62, the water inlets of the first water supply branch 63 and the second water supply branch 64 are connected with the softened condensed water tank 7, and the water outlets of the first water supply branch 63 and the second water supply branch 64 are connected with the water inlet of the economizer 5.
In some optional embodiments, referring to fig. 1, the embodiment of the present application provides a flue gas waste heat recovery system for a gas turbine generator set, a bypass pipe 65 is further provided between the water outlets of the first water supply branch 63 and the second water supply branch 64 of the system and the water inlet of the steam generator 4, and a second valve 66 is provided on the bypass pipe 65. A third valve 52 is arranged between the water outlets of the first water supply branch 63 and the second water supply branch 64 and the water inlet of the economizer 5.
When the economizer 5 needs to be overhauled or replaced, the third valve 52 is closed, the second valve 66 is opened, the water outlets of the first water supply branch 63 and the second water supply branch 64 are communicated with the bypass pipe 65, the water supply pipeline 6 supplies softened water to the steam generator 4 through the bypass pipe 65, the economizer 5 is prevented from being broken down, the economizer 5 can be independently removed, and the steam generator 4 cannot be shut down or the gas generator set cannot be shut down.
In some optional embodiments, referring to fig. 1, the embodiment of the present application provides a flue gas waste heat recovery system for a gas turbine generator set, and a softened water inlet 71 and a condensed water inlet 72 are provided at the top of the softened condensed water tank 7 of the system, and the softened water inlet 71 and the condensed water inlet 72 are used for providing softened water to the softened condensed water tank 7.
The softened condensed water tank 7 is internally provided with a floating ball type water valve 73, the floating ball type water valve 73 is used for controlling the opening and closing of the softened water inlet 71 and the condensed water inlet 72, and when the water level of the softened condensed water tank 7 reaches a set position, the floating ball type water valve 73 automatically closes the softened water inlet 71 and the condensed water inlet 72. An overflow pipe 74 is provided on the top of the softened condensate tank 7, a drain pipe is provided on the bottom of the softened condensate tank 7, a first valve 75 is provided on the drain pipe, and the overflow pipe 74 and the drain pipe are used for discharging softened water in the softened condensate tank 7.
In some optional embodiments, referring to fig. 2, the embodiment of the present application provides a flue gas waste heat recovery system for a gas turbine generator set, a steam generator 4 of the system includes a steam drum 41 and a heat exchanger 42, and the steam drum 41 is located on top of the heat exchanger 42 and is fixedly connected with the heat exchanger 42. The heat exchanger 42 comprises a shell and a heat exchange tube 43 positioned in the shell, the heat exchange tube 43 is positioned below the steam drum 41 and communicated with the steam drum 41, the shell is also provided with a flue gas inlet and a flue gas outlet, the flue gas inlet on the shell is communicated with the electric three-way valve 3, and the flue gas outlet on the shell is communicated with the economizer 5. The heat exchange tube 43 is positioned between the flue gas inlet and the flue gas outlet, and the heat exchanger 42 exchanges heat with the steam drum 41 through the heat exchange tube 43.
The heat exchange tube 43 includes a down tube, a header tube and an up tube, the diameter of the down tube is larger than that of the up tube, the top of the down tube and the top of the up tube are both communicated with the steam drum 41, the bottom of the down tube and the bottom of the up tube are both communicated with the header tube, and the down tube, the header tube and the up tube are all superconducting heat tubes.
In some optional embodiments, referring to fig. 1, the present application provides a flue gas waste heat recovery system for a gas turbine generator system, where an economizer 5 of the system includes a chamber and a water pipe disposed in the chamber, and a water inlet and a water outlet are respectively disposed at two ends of the water pipe. The chamber of the economizer 5 is also provided with a flue gas inlet and a flue gas outlet, and the flue gas inlet of the economizer 5 is connected with the flue gas outlet of the steam generator 4 through a flange. The water outlet of the water pipe is communicated to the water inlet of the steam generator 4, a sixth valve 51 is arranged between the water pipe and the water inlet of the steam generator 4, the water pipe is a stainless steel pipe, the sixth valve 51 is used for controlling the connection and disconnection of the water pipe of the economizer 5 for supplying water to the steam generator 4, and the sixth valve 51 is closed when the economizer 5 needs to be overhauled or replaced.
The steam generator 4 and the economizer 5 are both provided with a drain pipe 45, a fourth valve 46 is arranged on the drain pipe 45, and a cooling and sewage discharging pool 47 is arranged at the water outlet of the drain pipe 46. The top of the steam generator 4 is provided with a steam pipe 44, and the steam pipe 44 is provided with a fifth valve 48.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; 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 application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a gas generating set flue gas waste heat recovery system which characterized in that includes:
the gas generator set (1), the said gas generator set (1) includes gas engine and generator, the output shaft of the said gas engine and input shaft of the generator are connected coaxially;
the device comprises a flue gas waste heat recovery unit, a steam generator (4), an economizer (5) and a silencer (8), wherein the flue gas waste heat recovery unit comprises an electric three-way valve (3), the steam generator (4), the economizer (5) and the silencer (8) which are sequentially connected, an inlet of the electric three-way valve (3) is connected with a smoke exhaust pipe (2) of a gas engine, a flue gas outlet of the steam generator (4) is connected with a flue gas inlet of the economizer (5) through a flange, and a water outlet of the economizer (5) is connected with a water inlet of the steam generator (4);
a softened water supply unit for supplying softened water to the steam generator (4) and the economizer (5).
2. The flue gas waste heat recovery system of the gas generator set as claimed in claim 1, characterized in that:
the softened water supply unit comprises a softened condensed water tank (7) and a water supply pipeline (6), wherein the softened condensed water tank (7) is respectively connected with the steam generator (4) and the economizer (5) through the water supply pipeline (6).
3. The flue gas waste heat recovery system of the gas generator set as claimed in claim 2, characterized in that:
the water supply pipeline (6) comprises a first water supply branch (63) and a second water supply branch (64), a first water supply pump (61) is arranged on the first water supply branch (63), a second water supply pump (62) is arranged on the second water supply branch (64), the water inlets of the first water supply branch (63) and the second water supply branch (64) are connected with the softening and condensing water tank (7), and the water outlets of the first water supply branch (63) and the second water supply branch (64) are connected with the water inlet of the economizer (5).
4. The flue gas waste heat recovery system of the gas generator set as claimed in claim 3, wherein:
a bypass pipe (65) is further arranged between the water outlets of the first water supply branch (63) and the second water supply branch (64) and the water inlet of the steam generator (4), a second valve (66) is arranged on the bypass pipe (65), and a third valve (52) is arranged between the water outlets of the first water supply branch (63) and the second water supply branch (64) and the water inlet of the economizer (5).
5. The flue gas waste heat recovery system of the gas generator set as claimed in claim 2, characterized in that:
the top of softening condensate tank (7) is equipped with demineralized water inlet (71) and condensate water inlet (72), there are floater formula water valve (73) in the softening condensate tank (7), floater formula water valve (73) are used for controlling the switching of demineralized water inlet (71) and condensate water inlet (72), the top of softening condensate tank (7) is equipped with overflow pipe (74), is equipped with the drain pipe in the bottom of softening condensate tank, is equipped with first valve (75) on the drain pipe.
6. The flue gas waste heat recovery system of the gas generator set as claimed in claim 1, characterized in that:
steam generator (4) include steam pocket (41) and heat exchanger (42), steam pocket (41) and heat exchanger (42) fixed connection, heat exchanger (42) are including the casing and be located heat exchange tube (43) of casing, heat exchange tube (43) are located the below of steam pocket (41) and communicate with steam pocket (41), still be equipped with flue gas inlet and exhanst gas outlet on the casing, heat exchange tube (43) are located between flue gas inlet and the exhanst gas outlet, heat exchanger (42) are through heat exchange tube (43) and steam pocket (41) heat exchange.
7. The flue gas waste heat recovery system of the gas generator set as claimed in claim 6, wherein:
the heat exchange tube (43) comprises a descending tube, a collecting pipe and an ascending tube, the diameter of the descending tube is larger than that of the ascending tube, the top of the descending tube and the top of the ascending tube are communicated with the steam drum (41), the bottom of the descending tube and the bottom of the ascending tube are communicated with the collecting pipe, and the descending tube, the collecting pipe and the ascending tube are all superconducting heat tubes.
8. The flue gas waste heat recovery system of the gas generator set as claimed in claim 1, characterized in that:
the coal economizer (5) comprises a cavity and a water pipe arranged in the cavity, a water inlet and a water outlet are respectively formed in two ends of the water pipe, a flue gas inlet and a flue gas outlet are further formed in the cavity of the coal economizer (5), the water outlet of the water pipe is communicated to the water inlet of the steam generator (4), a sixth valve (51) is arranged between the water pipe and the water inlet of the steam generator (4), and the water pipe is a stainless steel pipe.
9. The flue gas waste heat recovery system of the gas generator set as claimed in claim 1, characterized in that:
steam generator (4) and economizer (5) all are equipped with drain pipe (45), be equipped with fourth valve (46) on drain pipe (45), the delivery port of drain pipe (45) is equipped with cooling blowdown pond (47).
10. The flue gas waste heat recovery system of the gas generator set as claimed in claim 1, characterized in that:
the top of the steam generator (4) is provided with a steam pipeline (44), and the steam pipeline (44) is provided with a fifth valve (48).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021352776.7U CN213119023U (en) | 2020-07-10 | 2020-07-10 | Flue gas waste heat recovery system of gas generator set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021352776.7U CN213119023U (en) | 2020-07-10 | 2020-07-10 | Flue gas waste heat recovery system of gas generator set |
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| CN213119023U true CN213119023U (en) | 2021-05-04 |
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| CN202021352776.7U Active CN213119023U (en) | 2020-07-10 | 2020-07-10 | Flue gas waste heat recovery system of gas generator set |
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| CN (1) | CN213119023U (en) |
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