CN218937076U - Energy-saving gas heating system - Google Patents
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- CN218937076U CN218937076U CN202320110772.5U CN202320110772U CN218937076U CN 218937076 U CN218937076 U CN 218937076U CN 202320110772 U CN202320110772 U CN 202320110772U CN 218937076 U CN218937076 U CN 218937076U
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Abstract
The utility model discloses an energy-saving gas heating system, which comprises a gas heater, a heat exchange unit, a heat source unit and a condensate water recovery unit; the gas heater is connected with a circulating water input side and a circulating water output side of the heat exchange unit through a circulating water pipeline, the heat source unit is connected with a heat source side of the heat exchange unit, and a condensation side of the heat exchange unit is connected with a condensation water recovery unit; the gas is heated by circulating water in the gas heater, and the gas heater conveys the circulating water to the heat exchange unit through a circulating water pipeline; the heat source unit conveys the heat source to the heat exchange unit, so that the heat source heats the circulating water in the heat exchange unit, and the circulating water heated by the heat exchange unit is conveyed into the gas heater through the circulating water pipeline again; the condensation water recovery unit is used for recovering condensation water generated after the heat source in the heat exchange unit is condensed. The utility model can effectively prevent the failure of shutdown and insufficient output of a certain heater, and realize safe and reliable operation.
Description
Technical Field
The utility model relates to the technical field of energy utilization and recovery, in particular to an energy-saving gas heating system using exhaust steam as a heat source.
Background
In the existing heavy industry, light industry and civil industry in China, a lot of low-grade steam is often generated, such as steam turbine exhaust steam of a power plant, a drainage expansion vessel, deaerator exhaust gas, waste heat steam and flash steam in the steel chemical industry and the like. The low-grade steam is not emphasized because of low pressure and low temperature, so that working medium or energy is wasted, and the method runs counter to the current standard of double carbon in China. Meanwhile, some gases are required to be heated to a certain temperature before being combusted or utilized because of the requirements in the process, the heated temperature is sometimes close to the saturation temperature of the exhaust steam, the possibility is provided for utilizing the exhaust steam, a typical application such as a secondary air before entering an air preheater of a coal-fired power plant is often required to be heated to a certain temperature in autumn and winter, and a heater for heating by auxiliary steam is usually adopted at present. However, the method of heating the gas by using the steam with higher taste is easy to cause energy waste, and the steam capable of doing work is used for providing low-temperature heat, so that the cost performance is not high.
Disclosure of Invention
In view of the above, the utility model provides an energy-saving gas heating system using exhaust steam as a heat source, which can solve the technical problems of energy waste and low cost performance caused by heating gas by using high-grade steam.
The first aspect of the utility model provides an energy-saving gas heating system, which comprises a gas heater, a heat exchange unit, a heat source unit and a condensate water recovery unit; the gas heater is connected with a circulating water input side and a circulating water output side of the heat exchange unit through a circulating water pipeline, the heat source unit is connected with a heat source side of the heat exchange unit, and a condensation side of the heat exchange unit is connected with the condensation water recovery unit; the gas is heated by circulating water in the gas heater, and the gas heater conveys the circulating water to the heat exchange unit through the circulating water pipeline; the heat source unit conveys a heat source to the heat exchange unit, so that the heat source heats circulating water in the heat exchange unit, and the circulating water heated by the heat exchange unit is conveyed into the gas heater through the circulating water pipeline again; the condensation water recovery unit is used for recovering condensation water generated after the heat source in the heat exchange unit is condensed.
Further, the heat exchange unit comprises a first heat exchanger, and the heat source unit comprises a first heat source; the heat source side of the first heat exchanger is connected with a first heat source pipeline, and the first heat source is conveyed into the first heat exchanger through the first heat source pipeline so that the first heat source heats circulating water in the first heat exchanger.
Further, the heat exchange unit further comprises a second heat exchanger, and the heat source unit further comprises a second heat source and a steam injector; the first heat source is conveyed into the steam injector through a first heat source pipeline, and the second heat source is conveyed into the steam injector through a second heat source pipeline; and the first heat source and the second heat source are mixed and upgraded by the steam ejector to form a third heat source, and the third heat source output by the steam ejector is conveyed into the second heat exchanger through a third heat source pipeline, so that the third heat source heats circulating water in the second heat exchanger.
Further, the condensate water recovery unit comprises a first condensate water recovery unit; the first condensate water recovery unit comprises a first condensate water tank and a first condensate water pump; the input end of the first condensation water tank is connected with the condensation side of the first heat exchanger through a first condensation water pipeline, the output end of the first condensation water tank is connected with a first condensation water discharge pipeline, and the first condensation water pump is arranged on the first condensation water discharge pipeline; the first condensate tank is used for collecting condensate water generated after the first heat source in the first heat exchanger is condensed, and the condensate water is pumped and discharged by the first condensate pump.
Further, the condensate water recovery unit comprises a second condensate water recovery unit; the second condensate water recovery unit comprises a second condensate water tank and a second condensate water pump; the input end of the second condensation water tank is connected with the condensation side of the second heat exchanger through a second condensation water pipeline, the output end of the second condensation water tank is connected with a second condensation water discharge pipeline, and the second condensation water pump is arranged on the second condensation water discharge pipeline; the second condensate tank is used for collecting condensate water generated after the third heat source in the second heat exchanger is condensed, and the condensate water is pumped and discharged by the second condensate pump.
Further, the heat exchange unit further comprises a third heat exchanger; the second heat source is also conveyed to the third heat exchanger through a second heat source pipeline, so that the second heat source heats circulating water in the third heat exchanger.
Further, the device also comprises a drainage unit, wherein the drainage unit comprises a drainage device, one end of the drainage device is connected with the condensation side of the third heat exchanger through a third condensation water pipeline, the other end of the drainage device is used for being connected with a drainage recovery system, and condensation water generated after the second heat source in the third heat exchanger is condensed is discharged to the drainage recovery system through the drainage device.
Further, the device also comprises a first vacuum unit, wherein the first vacuum unit is respectively connected with the heat source side of the first heat exchanger and the first condensation water tank through a first vacuumizing pipeline and is used for vacuumizing the heat source side of the first heat exchanger and the first condensation water tank and pumping the first heat source which is not condensed.
Further, the device also comprises a second vacuum unit which is respectively connected with the heat source side of the second heat exchanger and the second condensation water tank through a second vacuumizing pipeline and is used for vacuumizing the heat source side of the second heat exchanger and the second condensation water tank and pumping the third heat source which is not condensed.
The energy-saving gas heating system provided by the embodiment of the utility model uses the exhaust steam as a heat source, can meet the requirement of maximally utilizing the exhaust steam, can be applied to various industries, and achieves the purposes of energy saving and emission reduction. The heat exchange unit formed by the first heat exchanger, the second heat exchanger and the third heat exchanger which are connected in parallel can effectively prevent the failure of shutdown and insufficient output of a certain heater, and safe and reliable operation is realized.
Drawings
For purposes of illustration and not limitation, the utility model will now be described in accordance with its preferred embodiments, particularly with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of an energy-saving gas heating system according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a structure of an energy-saving gas heating system according to an embodiment of the present utility model.
Wherein: 100. a gas heater 110, a circulating water pipeline 120 and a circulating water pump;
200. a heat exchange unit 210, a first heat exchanger 220, a second heat exchanger 230 and a third heat exchanger;
300. a heat source unit 310, a steam injector 320, a first heat source line 330, a second heat source line 340, and a third heat source line;
400. a condensate water recovery unit 410, a first condensate water recovery unit 411, a first condensate water tank 412, a first condensate water pump 413, a first condensate water pipeline 414, a first condensate water discharge pipeline 420, a second condensate water recovery unit 421, a second condensate water tank 422, a second condensate water pump 423, a second condensate water pipeline 424, a second condensate water discharge pipeline;
500. a drainage unit 510, a steam trap 520, a third condensate pipeline 530 and a third condensate discharge pipeline;
610. a first vacuum unit 611, a first vacuumizing pipeline 620, a second vacuum unit 621, and a second vacuumizing pipeline;
700. and (3) a valve.
Detailed Description
In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, and the described embodiments are merely some, rather than all, embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
The embodiment of the utility model provides an energy-saving gas heating system using exhaust steam as a heat source, which is mainly used for heating gas, thereby achieving the recovery of exhaust steam heat, further achieving the purposes of energy saving and consumption reduction by using low-grade heat and increasing the work efficiency of high-grade steam.
The following describes in detail a specific implementation scheme of an energy-saving gas heating system according to an embodiment of the present utility model with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an energy-saving gas heating system according to an embodiment of the present utility model. Referring to fig. 1, the energy-saving gas heating system includes a gas heater 100, a heat exchange unit 200, a heat source unit 300, a condensed water recovery unit 400, and a water drain unit 500.
The gas is introduced into the gas heater 100 through the gas inlet side of the gas heater 100, heated by the gas heater 100, and the heated gas is outputted from the gas outlet side of the gas heater 100.
The heat exchange unit 200 includes a first heat exchanger 210, a second heat exchanger 220, and a third heat exchanger 230, the circulating water output side of the gas heater 100 is respectively connected to the circulating water input sides of the first heat exchanger 210, the second heat exchanger 220, and the third heat exchanger 230 through a circulating water pipeline 110, the circulating water output by the gas heater 100 respectively enters the first heat exchanger 210, the second heat exchanger 220, and the third heat exchanger 230 through the circulating water pipeline 110, and the circulating water is respectively heated by the first heat exchanger 210, the second heat exchanger 220, and the third heat exchanger 230; the circulating water output sides of the first heat exchanger 210, the second heat exchanger 220 and the third heat exchanger 230 are connected with the circulating water input side of the gas heater 100 through the circulating water pipeline 110, and the circulating water heated by the first heat exchanger 210, the second heat exchanger 220 and the third heat exchanger 230 enters the gas heater 100 again through the circulating water pipeline 110 so as to heat the gas in the gas heater 100.
The heat source unit 300 includes a first heat source, a second heat source, and a steam injector 310. The first heat source pipeline 320 is connected to the heat source side of the first heat exchanger 210, and the first heat source is input into the first heat exchanger 210 through the first heat source pipeline 320 to heat the circulating water in the first heat exchanger 210. The input end of the steam injector 310 is respectively connected with a first heat source pipeline 320 and a second heat source pipeline 330, the output end of the steam injector 310 is connected with the heat source side of the second heat exchanger 220 through a third heat source pipeline 340, the first heat source is conveyed into the steam injector 310 through the first heat source pipeline 320, the second heat source is conveyed into the steam injector 310 through the second heat source pipeline 330, the first heat source and the second heat source are upgraded by the steam injector 310 to obtain a third heat source, and the third heat source output by the steam injector 310 is input into the second heat exchanger 220 through the third heat source pipeline 340 so as to heat circulating water in the second heat exchanger 220. The heat source side of the third heat exchanger 230 is connected to a second heat source pipe 330, and the second heat source is also input into the third heat exchanger 230 through the second heat source pipe 330 to heat the circulating water entering the third heat exchanger 230.
The condensation water recovery unit 400 is connected to the condensation sides of the first heat exchanger 210 and the second heat exchanger 220, respectively, and is used for recovering condensation water generated after the condensation of the first heat source in the first heat exchanger 210 and the condensation water generated after the condensation of the third heat source in the second heat exchanger 220.
The water drain unit 500 is connected to the condensation side of the third heat exchanger 230, and is used for recovering condensed water generated after the second heat source of the third heat exchanger 230 is condensed.
In the embodiment of the utility model, the first heat source can be exhaust steam, the second heat source can be auxiliary steam, and the third heat source can be quality-improving exhaust steam. The upgraded exhaust steam is formed by mixing exhaust steam and auxiliary steam through the steam injector 310. The auxiliary steam is the steam extracted from the steam turbine or the steam generated by other equipment such as a boiler, and the temperature and the pressure of the steam are relatively high, so that the quality is relatively good.
The first heat source and the second heat source can be various due to different working conditions, the combination is not described here, and the basic principle is similar to the utility model. The heated gas in the embodiments of the present utility model may be air, flue gas or gas.
The energy-saving gas heating system provided by the embodiment of the utility model adopts the steam injector for quality improvement, so that the temperature and pressure of exhaust steam can be effectively improved, and the exhaust steam is not available.
The energy-saving gas heating system provided by the embodiment of the utility model uses the exhaust steam as a heat source, can meet the requirement of maximally utilizing the exhaust steam, can be applied to various industries, and achieves the purposes of energy saving and emission reduction. The heat exchange unit composed of the first heat exchanger, the second heat exchanger and the third heat exchanger which are connected in parallel can effectively prevent the failure of shutdown and insufficient output of a certain heater, and safe and reliable operation is achieved.
The working process of the energy-saving gas heating system is described below by taking the first heat source as exhaust steam, the second heat source as auxiliary steam, the third heat source as quality-improving exhaust steam and heating air as an example.
The air is introduced into the gas heater 100 through the gas inlet side of the gas heater 100, and is heated by the circulating water in the gas heater 100. The circulating water in the gas heater 100 at this time is sent to the first heat exchanger 210, the second heat exchanger 220, and the third heat exchanger 230 through the circulating water pipe 110, and the circulating water is heated by one or more of the first heat exchanger 210, the second heat exchanger 220, and the third heat exchanger 230.
When the temperature and pressure of the exhaust steam meet the capability of heating the circulating water, the exhaust steam enters the first heat exchanger 210 through the first heat source pipeline 320, and the exhaust steam provides heat for the circulating water after heat exchange of the first heat exchanger 210, so that the circulating water is heated. The condensate generated by the exhaust steam is recovered by the condensate recovery unit 400.
When the temperature and pressure of the exhaust steam are insufficient to raise the circulating water to the required temperature, auxiliary steam with higher pressure and the exhaust steam are mixed and upgraded by the steam injector 310 to obtain upgraded exhaust steam with higher temperature and pressure than the original exhaust steam, the upgraded exhaust steam enters the second heat exchanger 220 through the third heat source pipeline 340, and heat is provided for the circulating water after the upgraded exhaust steam exchanges heat by the second heat exchanger 220, so that the water temperature of the circulating water is raised to the required temperature. The condensate generated by the upgraded exhaust steam is recovered by the condensate recovery unit 400.
When the second heat exchanger 220 still cannot meet the heating requirement of the circulating water, the auxiliary steam can be directly input into the third heat exchanger 230 through the second heat source pipeline 330, and the auxiliary steam heats the circulating water after heat exchange of the third heat exchanger 230. The condensed water generated by the auxiliary steam is recovered through the drain unit 500.
The three working conditions can be independently used, or mixed to heat the circulating water, and the heating is dependent on the actual working conditions.
Because the quality of the exhaust steam is not high, the auxiliary steam with high quality commonly used in the prior art heats the gas, and the heat of the exhaust steam is difficult to utilize and is often wasted. The gas heating system provided by the embodiment of the utility model achieves the aims of saving energy, reducing consumption and reducing emission by utilizing exhaust steam to the maximum extent and utilizing auxiliary steam to the minimum extent.
In some embodiments, the gas heater 100 employs a dividing wall heater, and after the gas enters the gas heater 100, the gas is heated by the circulating water within the gas heater 100.
In the embodiment of the present utility model, the first heat exchanger 210 is a heat exchanger for realizing heat exchange between a first heat source (such as exhaust steam) and circulating water, the second heat exchanger 220 is a heat exchanger for realizing heat exchange between a third heat source (such as quality improvement exhaust steam) and circulating water, and the third heat exchanger 230 is a heat exchanger for realizing heat exchange between a second heat source (such as auxiliary steam) and circulating water. The first heat exchanger 210, the second heat exchanger 220 and the third heat exchanger 230 may be operated independently to heat the circulating water independently, or may be operated partially or completely simultaneously to heat the circulating water stepwise.
In some embodiments, the circulating water pipelines 110, in which the circulating water output sides of the first, second and third heat exchangers 210, 220 and 230 are connected to the circulating water input side of the gas heater 100, are respectively provided with the circulating water pump 120, and circulation of the circulating water among the gas heater 100, the first, second and third heat exchangers 210, 220 and 230 is achieved through the circulating water pump 120.
The gas heater 100 can also achieve the effect of general temperature raising by receiving the circulating water of the first heat exchanger 210, the second heat exchanger 220 and the third heat exchanger 230 in a layered and graded manner. At this time, the heated circulating water of different kinds is fed into the gas heater 100 by the plurality of circulating water pumps 120 to heat the gas step.
In some embodiments, the condensate water recovery unit 400 includes a first condensate water recovery unit 410 and a second condensate water recovery unit 420. The first condensate recovery unit 410 is connected to the condensation side of the first heat exchanger 210, and is configured to recover condensate generated after the condensation of the first heat source in the first heat exchanger 210. The second condensate recovery unit 420 is connected to the condensation side of the second heat exchanger 220, and is configured to recover condensate generated after the condensation of the third heat source in the second heat exchanger 220.
Fig. 2 is a schematic diagram of a structure of an energy-saving gas heating system according to an embodiment of the present utility model. Referring to fig. 2, the first condensate recovery unit 410 includes a first condensate tank 411 and a first condensate pump 412. The input end of the first condensate tank 411 is connected to the condensation side of the first heat exchanger 210 through a first condensate pipe 413, the output end of the first condensate tank 411 is connected to a first condensate drain pipe 414, and the first condensate pump 412 is mounted on the first condensate drain pipe 414. The first condensate tank 411 collects condensate generated after the first heat source in the first heat exchanger 210 is condensed, and pumps water and discharges the condensate by the first condensate pump 412.
Referring to fig. 2, the second condensate recovery unit 420 includes a second condensate tank 421 and a second condensate pump 422. The input end of the second condensed water tank 421 is connected to the condensing side of the second heat exchanger 210 through a second condensed water pipeline 423, the output end of the second condensed water tank 421 is connected to a second condensed water discharge pipeline 424, and the second condensed water pump 422 is mounted on the second condensed water discharge pipeline 424. The second condensate tank 421 collects condensate generated after the third heat source in the second heat exchanger 210 is condensed, and is pumped and discharged by the second condensate pump 412.
In some embodiments, the first condensate tank 411 and the second condensate tank 421 are respectively provided with a liquid level meter, and the first condensate pump 412 and the second condensate pump 422 can be controlled to operate according to the liquid level value displayed by the liquid level meter.
Referring to fig. 2, in some embodiments, the energy-saving gas heating system further includes a first vacuum unit 610 and a second vacuum unit 620 due to the lower pressure of the first heat source and the third heat source and the presence of uncondensed gas.
The first vacuum unit 610 is connected to the heat source side of the first heat exchanger 210 and the first condensation water tank 411 through a first vacuum pipe 611, and is used for evacuating the heat source side of the first heat exchanger 210 and the first condensation water tank 411, and pumping away the uncondensed first heat source.
The second vacuum unit 620 is connected to the heat source side of the second heat exchanger 220 and the second condensation water tank 421 through a second vacuumizing pipe 621, and is used for vacuumizing the heat source side of the second heat exchanger 220 and the second condensation water tank 421 and pumping the non-condensed third heat source.
In some embodiments, the first and second vacuum units 610, 620 may be vacuum pumps or other evacuating devices, with the purpose of evacuating non-condensable gases from the condensing sides of the first and second heat exchangers and obtaining a vacuum, forcing the first and third heat sources (exhaust steam) into the first and second heat exchangers for condensation.
Referring to fig. 2, in some embodiments, the water drain unit 500 includes a water drain 510, one end of the water drain 510 is connected to the condensation side of the third heat exchanger 230 through a third condensation water pipeline 520, the other end of the water drain 510 is connected to a water drain recovery system through a third condensation water discharge pipeline 530, and condensed water generated after the condensation of a second heat source (such as auxiliary steam) in the third heat exchanger 230 is discharged to the water drain recovery system through the water drain 510.
In some embodiments, the drainage unit 500 may also be composed of a condensate tank and a condensate pump, and the structures of the drainage unit are similar to those of the first condensate recovery unit 410 and the first condensate recovery unit 420, and will not be described again.
Referring to fig. 2, valves 700 are respectively disposed on the circulating water pipeline 110, the first heat source pipeline 320, the second heat source pipeline 330, the third heat source pipeline 340, the first vacuuming pipeline 611, the second vacuuming pipeline 621, the first condensed water pipeline 413, the second condensed water pipeline 423, the first condensed water discharge pipeline 414, the second condensed water discharge pipeline 424, the third condensed water pipeline 520 and the third condensed water discharge pipeline 530.
The first heat exchanger, the second heat exchanger and the third heat exchanger can work independently or partially or all at the same time through the opening and closing of the valve 700 on each pipeline and the adjustment of the opening and closing degree. By controlling the valves 700 on the branches of the circulating water pipeline, the heat exchangers on the branches independently heat the circulating water and then enter the gas heater 100, and when a plurality of circulating water pumps 120 are adopted, the pipelines of the circulating water pumps 120 entering and exiting are arranged in a grading manner with the first heat exchanger 210, the second heat exchanger 220 and the third heat exchanger 210, and the circulating water after the step heat exchange in the gas heater 100 can independently heat the gas step by step. The flexible configuration can be carried out according to actual requirements according to the requirements of specific working conditions. Through improvement of a pipeline, independent arrangement of a circulating water pump and graded manufacture of heat exchangers, circulating water heated by different heat exchangers can be independently received according to temperature volumes, gas is heated in a temperature gradient mode, and the circulating water is returned to each heat exchanger for reheating.
Taking the first heat source as exhaust steam, the second heat source as auxiliary steam and the third heat source as quality improvement exhaust steam as an example, the working process of the energy-saving gas heating system is as follows:
circulating water in the gas heater 100 flows into the first heat exchanger 210, the second heat exchanger 220 and the third heat exchanger 230 through the circulating water pipeline 110 respectively;
the exhaust steam is input into the first heat exchanger 210 through the first heat source pipeline 320, and after the exhaust steam exchanges heat through the first heat exchanger 210, the exhaust steam provides heat for circulating water in the first heat exchanger 210 to heat the circulating water, and after the exhaust steam is heated through the first heat exchanger 210, the circulating water flows into the gas heater 100 again through the circulating water pipeline 110. The condensate water generated after the exhaust steam in the first heat exchanger 210 is condensed is collected by the first condensate tank 411 and pumped and discharged by the first condensate pump 412.
Or, after the exhaust steam and the auxiliary steam are upgraded by the steam injector 310, upgraded exhaust steam is obtained, the upgraded exhaust steam is input into the second heat exchanger 220 by the third heat source pipeline 340, and after the upgraded exhaust steam is subjected to heat exchange by the second heat exchanger 220, heat is provided for circulating water in the second heat exchanger 220 to heat the circulating water, and after the circulating water is heated by the second heat exchanger 220, the circulating water flows into the gas heater 100 again by the circulating water pipeline 110. The condensate water generated after the exhaust steam in the second heat exchanger 220 is condensed is collected by the second condensate tank 421 and pumped and discharged by the second condensate pump 422.
Or, the auxiliary steam is input into the third heat exchanger 230 through the second heat source pipeline 330, and after the auxiliary steam exchanges heat through the third heat exchanger 230, the auxiliary steam provides heat for circulating water in the third heat exchanger 230 to heat the circulating water, and after the auxiliary steam is heated by the third heat exchanger 230, the circulating water flows into the gas heater 100 through the circulating water pipeline 110. The condensed water generated after the auxiliary steam in the third heat exchanger 230 is condensed is discharged to the drain recovery system through the drain trap 510.
The gas is introduced into the gas heater 100 through the gas inlet side of the gas heater 100, and the gas is heated by the circulating water in the gas heater 100.
The scope of the utility model encompasses all conditions suitable for such exhaust steam and steam heating, including power stations, steel, petrochemical, food and pharmaceutical, heating power, etc., in the civilian light industry, heavy industry, military, aerospace, etc., and is not explicitly recited herein.
The energy-saving gas heating system can be used for energy-saving gas heating, and the specific energy-saving gas heating method is realized based on the energy-saving gas heating system. The energy-saving gas heating method comprises the following steps:
the circulating water in the gas heater 100 is transferred to the first heat exchanger 210, the second heat exchanger 220, and the third heat exchanger 230 through the circulating water line 110.
The first heat source enters the first heat exchanger 210 through the first heat source pipeline 320, and after the first heat source exchanges heat through the first heat exchanger 210, heat is provided for the circulating water so as to heat the circulating water. The condensed water generated by the first heat source is recovered through the condensed water recovery unit 400.
Alternatively, the first heat source enters the steam injector 310 through the first heat source pipeline 320, the second heat source enters the steam injector 310 through the second heat source pipeline 330, the first heat source and the second heat source are mixed and upgraded through the steam injector 310 to form a third heat source, the third heat source enters the second heat exchanger 220 through the third heat source pipeline 340, and the third heat source provides heat for the circulating water after heat exchange of the second heat exchanger 220 so as to heat the circulating water. The condensed water generated by the third heat source is recovered through the condensed water recovery unit 400.
Alternatively, the second heat source is input into the third heat exchanger 230 through the second heat source pipe 330, and the second heat source heats the circulating water after exchanging heat through the third heat exchanger 230. The condensed water generated by the second heat source is recovered through the water drain unit 500.
The gas is introduced into the gas heater 100 through the gas inlet side of the gas heater 100, and the gas is heated by the circulating water in the gas heater 100.
In the embodiment of the utility model, the first heat source can be exhaust steam, the second heat source can be auxiliary steam, and the third heat source can be quality-improving exhaust steam.
The above description has been made of the implementation of an energy-saving gas heating system provided in the embodiment of the present utility model. Specific features of an energy-efficient gas heating system provided by embodiments of the present utility model may be specifically designed according to the effects of the features disclosed above, all of which are within the ability of those skilled in the art. Moreover, the above disclosed features are not limited to the disclosed combinations with other features, and other combinations between features may be made by those skilled in the art in accordance with the purpose of the present utility model to achieve the purpose of the present utility model.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives can occur depending upon design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (9)
1. An energy-saving gas heating system is characterized by comprising a gas heater, a heat exchange unit, a heat source unit and a condensate water recovery unit;
the gas heater is connected with a circulating water input side and a circulating water output side of the heat exchange unit through a circulating water pipeline, the heat source unit is connected with a heat source side of the heat exchange unit, and a condensation side of the heat exchange unit is connected with the condensation water recovery unit;
the gas is heated by circulating water in the gas heater, and the gas heater conveys the circulating water to the heat exchange unit through the circulating water pipeline; the heat source unit conveys a heat source to the heat exchange unit, so that the heat source heats circulating water in the heat exchange unit, and the circulating water heated by the heat exchange unit is conveyed into the gas heater through the circulating water pipeline again; the condensation water recovery unit is used for recovering condensation water generated after the heat source in the heat exchange unit is condensed.
2. The energy efficient gas heating system of claim 1, wherein the heat exchange unit comprises a first heat exchanger and the heat source unit comprises a first heat source;
the heat source side of the first heat exchanger is connected with a first heat source pipeline, and the first heat source is conveyed into the first heat exchanger through the first heat source pipeline so that the first heat source heats circulating water in the first heat exchanger.
3. The energy efficient gas heating system of claim 2, wherein the heat exchange unit further comprises a second heat exchanger, the heat source unit further comprising a second heat source and a steam injector;
the first heat source is conveyed into the steam injector through a first heat source pipeline, and the second heat source is conveyed into the steam injector through a second heat source pipeline; and the first heat source and the second heat source are mixed and upgraded by the steam ejector to form a third heat source, and the third heat source output by the steam ejector is conveyed into the second heat exchanger through a third heat source pipeline, so that the third heat source heats circulating water in the second heat exchanger.
4. The energy efficient gas heating system of claim 2, wherein the condensate water recovery unit comprises a first condensate water recovery unit; the first condensate water recovery unit comprises a first condensate water tank and a first condensate water pump;
the input end of the first condensation water tank is connected with the condensation side of the first heat exchanger through a first condensation water pipeline, the output end of the first condensation water tank is connected with a first condensation water discharge pipeline, and the first condensation water pump is arranged on the first condensation water discharge pipeline; the first condensate tank is used for collecting condensate water generated after the first heat source in the first heat exchanger is condensed, and the condensate water is pumped and discharged by the first condensate pump.
5. The energy-saving gas heating system according to claim 3, wherein the condensed water recovery unit includes a second condensed water recovery unit; the second condensate water recovery unit comprises a second condensate water tank and a second condensate water pump;
the input end of the second condensation water tank is connected with the condensation side of the second heat exchanger through a second condensation water pipeline, the output end of the second condensation water tank is connected with a second condensation water discharge pipeline, and the second condensation water pump is arranged on the second condensation water discharge pipeline; the second condensate tank is used for collecting condensate water generated after the third heat source in the second heat exchanger is condensed, and the condensate water is pumped and discharged by the second condensate pump.
6. The energy efficient gas heating system of claim 3, wherein the heat exchange unit further comprises a third heat exchanger; the second heat source is also conveyed to the third heat exchanger through a second heat source pipeline, so that the second heat source heats circulating water in the third heat exchanger.
7. The energy-saving gas heating system according to claim 6, further comprising a water trap unit, wherein the water trap unit comprises a water trap, one end of the water trap is connected with the condensation side of the third heat exchanger through a third condensation water pipeline, the other end of the water trap is used for being connected with a water trap recovery system, and condensation water generated after condensation of the second heat source in the third heat exchanger is discharged to the water trap recovery system through the water trap.
8. The energy-saving gas heating system according to claim 4, further comprising a first vacuum unit connected to the heat source side of the first heat exchanger and the first condensation water tank through a first vacuum line, respectively, for evacuating the heat source side of the first heat exchanger and the first condensation water tank and removing the first heat source that is not condensed.
9. The energy-saving gas heating system according to claim 5, further comprising a second vacuum unit connected to the heat source side of the second heat exchanger and the second condensed water tank through a second vacuum line, respectively, for evacuating the heat source side of the second heat exchanger and the second condensed water tank and removing the third heat source that is not condensed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320110772.5U CN218937076U (en) | 2023-01-13 | 2023-01-13 | Energy-saving gas heating system |
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