CN210512790U - Modularized flue gas waste heat recovery heat exchanger system - Google Patents
Modularized flue gas waste heat recovery heat exchanger system Download PDFInfo
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- CN210512790U CN210512790U CN201920718048.4U CN201920718048U CN210512790U CN 210512790 U CN210512790 U CN 210512790U CN 201920718048 U CN201920718048 U CN 201920718048U CN 210512790 U CN210512790 U CN 210512790U
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Abstract
The utility model relates to a modularized flue gas waste heat recovery heat exchanger system, a plurality of heat exchanger modules are orderly connected in parallel and arranged in a cavity inside an integral box, and each heat exchanger module works independently; the high-temperature flue gas input main pipe, the low-temperature flue gas output main pipe, the cold water input main pipe and the hot water output main pipe are all arranged outside the integral box; the heat exchanger module comprises a high-temperature heat exchanger and a low-temperature heat exchanger, the high-temperature heat exchanger and the low-temperature heat exchanger are connected in series, the heat exchanger module is put into work successively in the application, and the next heat exchanger module is started after the previous heat exchanger module is in a heat exchange stable working stage; the waste heat of the flue gas is utilized to the maximum extent, and the utilization rate of primary energy of the distributed energy station is improved; the heat exchanger can supply hot water in stages according to temperature, so that a low-temperature heat source can be utilized in a cascade mode.
Description
Technical Field
The utility model relates to a heat exchanger technical field, specifically say, relate to a modularization flue gas waste heat recovery heat exchanger system for gas internal-combustion engine distributed energy station.
Background
At present, the environmental pressure is increasing, the energy system using coal as main fuel for centralized power generation faces the current situation of compressed energy production, and clean energy represented by natural gas is introduced in spring. The natural gas distributed power station has the characteristics of close proximity to users, small installed capacity, simultaneous supply of various cold, heat and electricity energy sources, cascade utilization of the energy sources, fixed electricity by heat, quick and convenient start and stop and the like.
The tail end of a distributed energy station of a gas combustion engine generator set is generally required to be provided with a heat exchanger. The heat exchangers are of various types and are classified according to structure: the heat exchanger comprises a shell-and-tube heat exchanger, a (drill) plate heat exchanger, a plate-fin heat exchanger and the like, wherein the shell-and-tube heat exchanger is widely applied, the design technology and theoretical research are relatively basic, the application reliability is relatively high, and the research focus at present mainly focuses on the aspects of tube-side and shell-side heat transfer technologies. Meanwhile, in the development process of some novel heat exchangers, corrosion-resistant heat exchangers made of non-metallic materials are common heat exchangers, such as graphite heat exchangers, fluoroplastic heat exchangers and glass heat exchangers.
However, the heat exchanger used in the distributed energy station has a special environment, firstly, the flue gas-hot water type heat exchanger is matched according to the flue gas volume of rated capacity of a power station, the actual operation condition fluctuates greatly, the heat exchanger is often operated under a partial load condition, the supply volume of the flue gas is lower than the requirement of the heat exchanger, and acidic substances (NO) in the flue gas are causedx、SO2) Water condensation, causing corrosion; secondly, when the distributed energy station is frequently started and stopped, the radiator works discontinuously, and acid substances are separated out when the radiator is started each time, so that heat exchange is causedThe corrosion of the radiator is mainly sulfide acid corrosion which is shown in practical cases; finally, when the energy station is partially loaded, the fluctuation of the outlet water temperature of the hot water in the heat exchanger is large, which results in very poor experience of the energy supply object (hot water user).
In view of the above, it is necessary to design a heat exchanger suitable for a distributed energy source station of a gas combustion engine.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design is reasonable, the system is perfect, progressive increase heat transfer ability, flue gas waste heat utilization rate are high be used for the modularization flue gas waste heat recovery heat exchanger system at gas internal-combustion engine distributing type energy station.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a modularization flue gas waste heat recovery heat exchanger system, includes whole case, its characterized in that: the system also comprises a high-temperature flue gas input main pipe, a low-temperature flue gas output main pipe, a cold water input main pipe, a hot water output main pipe and a plurality of heat exchanger modules; the heat exchanger modules are sequentially arranged in parallel in the inner cavity of the integral box, and each heat exchanger module works independently; the high-temperature flue gas input main pipe, the low-temperature flue gas output main pipe, the cold water input main pipe and the hot water output main pipe are all arranged outside the integral box; the heat exchanger module comprises a high-temperature heat exchanger and a low-temperature heat exchanger, wherein the high-temperature heat exchanger and the low-temperature heat exchanger are respectively provided with a smoke inlet, a smoke outlet, a water inlet and a water outlet, the smoke inlet of the high-temperature heat exchanger is connected with the high-temperature smoke input main pipe through a branch pipe, and a throttle valve is arranged on the branch pipe; the smoke outlet of the high-temperature heat exchanger is connected with the smoke inlet of the low-temperature heat exchanger through a second branch pipe, and a first temperature sensor is arranged on the second branch pipe; a smoke outlet of the low-temperature heat exchanger is connected with a low-temperature smoke output main pipe through a third branch pipe, and a second temperature sensor is arranged on the third branch pipe; the water inlet of the low-temperature heat exchanger is connected with the cold water input main pipe through a first water pipe, an electric valve is arranged on the first water pipe, the water outlet of the low-temperature heat exchanger is connected with the water inlet of the high-temperature heat exchanger through a second water pipe, the water outlet of the high-temperature heat exchanger is connected with the hot water output main pipe through a third water pipe, and a third temperature sensor is arranged on the third water pipe.
Preferably, the heat exchanger system further comprises a controller, and the controller is in communication connection with the throttle valve, the electrically operated valve, the first temperature sensor, the second temperature sensor and the third temperature sensor in each heat exchanger module.
Preferably, the bottom surface of the box body of the low-temperature heat exchanger is obliquely arranged, and a condensed water outlet is arranged at the lower part.
Preferably, the low-temperature flue gas output main pipe is made of epoxy resin, and a water collecting tank is arranged in the low-temperature flue gas output main pipe.
Preferably, the low-temperature heat exchanger is internally provided with a plurality of heat exchange water pipes, and the outer surfaces of the heat exchange water pipes are sprayed with the anti-corrosion layers.
The utility model discloses a working process does: firstly, in an initial state, a throttle valve in a first heat exchanger module is kept normally open, and throttle valves in other heat exchanger modules are closed; then, introducing smoke into the first heat exchanger module, obtaining information of the first temperature sensor and the second temperature sensor by the controller, and controlling the electric valve to open by a certain opening degree by the controller when the reading of the second temperature sensor reaches 35 ℃, namely the smoke temperature of the smoke outlet of the low-temperature heat exchanger is 35 ℃; along with the slow rise of the smoke outlet temperature, when the smoke temperature of the smoke outlet of the low-temperature heat exchanger is close to 50 ℃, and according to the hot water temperature monitored by the third temperature sensor, further opening the opening of the electric valve until the opening of the electric valve is completely opened; and (3) as time goes on, when the smoke temperature of the smoke outlet of the high-temperature heat exchanger rises to 125 ℃, then, the second heat exchanger module is started to work, the opening degrees of the throttle valve and the electric valve of the second heat exchanger module are determined according to the smoke temperature of the smoke outlet of the high-temperature heat exchanger in the first heat exchanger module, the smoke temperature of the smoke outlet of the low-temperature heat exchanger and the hot water temperature, and the like, and the subsequent heat exchanger modules are gradually started until the full-load working condition of the distributed generator set of the gas internal combustion engine is met.
Compared with the prior art, the utility model, have following advantage and effect:
1. the modular design is adopted, and the heat exchange capacity is increased gradually;
2. the heat exchanger has strong adaptability and flexibly distributes the heat exchange capacity of a single module and the number of the modules;
3. the exit temperature of the flue gas is effectively controlled and stabilized within a fixed range, generally 35-50 ℃, and the heat pollution of the urban environment is effectively eliminated;
4. the outer surface of the heat exchange water pipe is sprayed with the anti-corrosion layer, so that the acid corrosion caused by acidic components in the flue gas can be effectively resisted, and the service life of the heat exchanger is prolonged;
5. the waste heat of the flue gas is utilized to the maximum extent, and the utilization rate of primary energy of the distributed energy station is improved; the heat exchanger can supply hot water in stages according to the temperature, so that a low-temperature heat source can be utilized in a gradient manner;
6. the installation is maintained conveniently, and effectual reduction maintenance time does not shut down the maintenance even, sparingly installs and reserves the place, only needs to change out the module that breaks down, has reduced maintenance cost, resources are saved.
Drawings
In order to illustrate the embodiments of the present invention or the solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a flue gas side structure of a heat exchanger system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a water-side structure of a heat exchanger system according to an embodiment of the present invention.
Fig. 3 is the internal structure schematic diagram of the heat exchanger in the embodiment of the present invention.
Description of reference numerals: the integrated box comprises an integrated box 1, a throttle valve 2, an electric valve 3, a third temperature sensor 4, a high-temperature flue gas input main pipe 5, a low-temperature flue gas output main pipe 6, a cold water input main pipe 7, a hot water output main pipe 8, a first temperature sensor 9, a second temperature sensor 10, a heat exchanger module 11, a high-temperature heat exchanger 11-1, a low-temperature heat exchanger 11-2, a condensed water outlet 1121, a third water pipe 12, a second water pipe 13, a first water pipe 14, a first branch pipe 15, a second branch pipe 16, a third branch pipe 17 and a heat exchange water pipe 18.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
See fig. 1-3.
The embodiment is a modular flue gas waste heat recovery heat exchanger system, which comprises an integral box 1, a controller, a high-temperature flue gas input header pipe 5, a low-temperature flue gas output header pipe 6, a cold water input header pipe 7, a hot water output header pipe 8 and a plurality of heat exchanger modules 11, wherein the plurality of heat exchanger modules 11 are sequentially connected in parallel and are arranged in a cavity inside the integral box 1, and each heat exchanger module 11 works independently; the number of heat exchanger modules 11 is determined according to the operating conditions of the generator set. The high-temperature flue gas input header pipe 5, the low-temperature flue gas output header pipe 6, the cold water input header pipe 7 and the hot water output header pipe 8 are all arranged outside the integral box 1. The whole box 1 is provided with a heat insulation layer which is made of different materials, and the highest temperature of the outer wall of the box body is not more than 40 ℃.
In this embodiment, the heat exchanger module 11 includes a high temperature heat exchanger 11-1 and a low temperature heat exchanger 11-2, and the high temperature heat exchanger 11-1 and the low temperature heat exchanger 11-2 have a smoke inlet, a smoke outlet, a water inlet, and a water outlet.
In this embodiment, the smoke inlet of the high temperature heat exchanger 11-1 is connected to the high temperature smoke input header pipe 5 through a first branch pipe 15, and the first branch pipe 15 is provided with the throttle valve 2, and the throttle valve 2 is used for controlling the amount of smoke introduced into the high temperature heat exchanger 11-1.
In this embodiment, the smoke outlet of the high temperature heat exchanger 11-1 is connected to the smoke inlet of the low temperature heat exchanger 11-2 through the second branch pipe 16, the first temperature sensor 9 is installed on the second branch pipe 16, and the first temperature sensor 9 is used for monitoring the smoke temperature of the smoke outlet of the high temperature heat exchanger 11-1 and feeding the temperature value back to the controller.
In this embodiment, the smoke outlet of the low-temperature heat exchanger 11-2 is connected to the low-temperature smoke output header pipe 6 through a third branch pipe 17, a second temperature sensor 10 is installed on the third branch pipe 17, and the second temperature sensor 10 is used for monitoring the smoke temperature of the smoke outlet of the low-temperature heat exchanger 11-2 and feeding back the temperature value to the controller.
In this embodiment, a water inlet of the low-temperature heat exchanger 11-2 is connected with the cold water input header pipe 7 through a first water pipe 14, an electric valve 3 is installed on the first water pipe 14, the electric valve 3 controls the water inflow, a water outlet of the low-temperature heat exchanger 11-2 is connected with a water inlet of the high-temperature heat exchanger 11-1 through a second water pipe 13, a water outlet of the high-temperature heat exchanger 11-1 is connected with the hot water output header pipe 8 through a third water pipe 12, a third temperature sensor 4 is installed on the third water pipe 12, and the third temperature sensor 4 monitors the temperature of hot water generated after heat exchange.
In this embodiment, the controller is in communication connection with the throttle valve 2, the electrically operated valve 3, the first temperature sensor 9, the second temperature sensor 10 and the third temperature sensor 4 in each heat exchanger module 11, and the prior art is referred to as the principle of the controller.
In this embodiment, the bottom surface of the box body of the low temperature heat exchanger 11-2 is disposed obliquely, a condensed water outlet 1121 is disposed at a low position, and condensed water generated in the low temperature heat exchanger 11-2 is discharged through the condensed water outlet 1121 for centralized collection.
A plurality of heat exchange water pipes are arranged in the heat exchanger, for example, as shown in FIG. 3, wherein the reference numeral 18 is a heat exchange water pipe, and an anti-corrosion layer is sprayed on the outer surface of the heat exchange water pipe in the low-temperature heat exchanger 11-2, so that the acid corrosion caused by acidic components in the flue gas can be effectively resisted, and the service life of the heat exchanger is prolonged. The low-temperature flue gas output main pipe 6 is made of epoxy resin, and a water collecting tank is arranged in the low-temperature flue gas output main pipe.
The working process of the heat exchanger system of the embodiment is as follows: firstly, in an initial state, the throttle valve 2 in the first heat exchanger module 11 is kept normally open, and the throttle valves in other heat exchanger modules are closed; then, introducing smoke into the first heat exchanger module 11, obtaining information of the first temperature sensor 9 and the second temperature sensor 10 by the controller, and controlling the electric valve 3 to open by a certain opening degree by the controller when the reading of the second temperature sensor 10 reaches 35 ℃, namely the smoke temperature of the smoke outlet of the low-temperature heat exchanger 11-2 is 35 ℃; with the slow rise of the smoke outlet temperature, when the smoke temperature at the smoke outlet of the low-temperature heat exchanger 11-2 is close to 50 ℃, and according to the hot water temperature monitored by the third temperature sensor 4, further opening the opening degree of the electric valve 3 until the opening degree of the electric valve 3 is completely opened; and (3) as time goes on, when the smoke temperature of the smoke outlet of the high-temperature heat exchanger 11-1 rises to 125 ℃, then, the second heat exchanger module is started to work, the opening degrees of the throttle valve and the electric valve of the second heat exchanger module are determined according to the smoke temperature of the smoke outlet of the high-temperature heat exchanger in the first heat exchanger module, the smoke temperature of the smoke outlet of the low-temperature heat exchanger and the hot water temperature, and the like, and the subsequent heat exchanger modules are gradually started until the full-load working condition of the distributed generator set of the gas internal combustion engine is met.
In this embodiment, the heat exchanger modules are put into operation one by one, and after the previous heat exchanger module is in the heat exchange stable operation stage, the next heat exchanger module is started; the working stage of each heat exchanger module is divided into a preheating stage, a hot water transition stage and a stable working stage. The refined working mode shortens the time of separating out the flue gas in the heat exchanger, greatly reduces the time of staying in the heat exchanger even if acidic substances are separated out, improves the corrosion resistance of the heat exchange device, and improves the supply quality of hot water.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the patent idea of the utility model are included in the protection scope of the patent of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (5)
1. The utility model provides a modularization flue gas waste heat recovery heat exchanger system, includes whole case (1), its characterized in that: the system also comprises a high-temperature flue gas input main pipe (5), a low-temperature flue gas output main pipe (6), a cold water input main pipe (7), a hot water output main pipe (8) and a plurality of heat exchanger modules (11); the heat exchanger modules (11) are sequentially arranged in parallel in the inner cavity of the integral box (1), and each heat exchanger module (11) works independently; the high-temperature flue gas input header pipe (5), the low-temperature flue gas output header pipe (6), the cold water input header pipe (7) and the hot water output header pipe (8) are all arranged outside the integral box (1); the heat exchanger module (11) comprises a high-temperature heat exchanger (11-1) and a low-temperature heat exchanger (11-2), and the high-temperature heat exchanger (11-1) and the low-temperature heat exchanger (11-2) are respectively provided with a smoke inlet, a smoke outlet, a water inlet and a water outlet;
a smoke inlet of the high-temperature heat exchanger (11-1) is connected with the high-temperature smoke input main pipe (5) through a first branch pipe (15), and an air throttle valve (2) is arranged on the first branch pipe (15); a smoke outlet of the high-temperature heat exchanger (11-1) is connected with a smoke inlet of the low-temperature heat exchanger (11-2) through a second branch pipe (16), and a first temperature sensor (9) is arranged on the second branch pipe (16); a smoke outlet of the low-temperature heat exchanger (11-2) is connected with a low-temperature smoke output main pipe (6) through a third branch pipe (17), and a second temperature sensor (10) is arranged on the third branch pipe (17);
the water inlet of the low-temperature heat exchanger (11-2) is connected with the cold water input main pipe (7) through a first water pipe (14), the electric valve (3) is installed on the first water pipe (14), the water outlet of the low-temperature heat exchanger (11-2) is connected with the water inlet of the high-temperature heat exchanger (11-1) through a second water pipe (13), the water outlet of the high-temperature heat exchanger (11-1) is connected with the hot water output main pipe (8) through a third water pipe (12), and a third temperature sensor (4) is installed on the third water pipe (12).
2. The modular flue gas waste heat recovery heat exchanger system of claim 1, wherein: the heat exchanger system further comprises a controller, and the controller is in communication connection with the throttle valve (2), the electric valve (3), the first temperature sensor (9), the second temperature sensor (10) and the third temperature sensor (4) in each heat exchanger module (11).
3. The modular flue gas waste heat recovery heat exchanger system of claim 1, wherein: the bottom surface of the box body of the low-temperature heat exchanger (11-2) is obliquely arranged, and a condensed water outlet (1121) is arranged at the lower part.
4. The modular flue gas waste heat recovery heat exchanger system of claim 1, wherein: the low-temperature flue gas output main pipe (6) is made of epoxy resin, and a water collecting tank is arranged in the low-temperature flue gas output main pipe.
5. The modular flue gas waste heat recovery heat exchanger system of claim 1, wherein: the low-temperature heat exchanger (11-2) is internally provided with a plurality of heat exchange water pipes, and an anti-corrosion layer is sprayed on the outer surfaces of the heat exchange water pipes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920718048.4U CN210512790U (en) | 2019-05-20 | 2019-05-20 | Modularized flue gas waste heat recovery heat exchanger system |
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| CN201920718048.4U CN210512790U (en) | 2019-05-20 | 2019-05-20 | Modularized flue gas waste heat recovery heat exchanger system |
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| CN210512790U true CN210512790U (en) | 2020-05-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484488A (en) * | 2022-04-15 | 2022-05-13 | 秦皇岛信能能源设备有限公司 | Flue gas heat exchange system with water leakage self-checking and cleaning functions |
| CN114484487A (en) * | 2022-04-14 | 2022-05-13 | 秦皇岛信能能源设备有限公司 | Flue gas heat exchange system capable of realizing efficient heat exchange |
-
2019
- 2019-05-20 CN CN201920718048.4U patent/CN210512790U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484487A (en) * | 2022-04-14 | 2022-05-13 | 秦皇岛信能能源设备有限公司 | Flue gas heat exchange system capable of realizing efficient heat exchange |
| CN114484487B (en) * | 2022-04-14 | 2022-07-22 | 秦皇岛信能能源设备有限公司 | Flue gas heat exchange system capable of realizing efficient heat exchange |
| CN114484488A (en) * | 2022-04-15 | 2022-05-13 | 秦皇岛信能能源设备有限公司 | Flue gas heat exchange system with water leakage self-checking and cleaning functions |
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