CN211668018U - Boiler system - Google Patents
Boiler system Download PDFInfo
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- CN211668018U CN211668018U CN201922352579.9U CN201922352579U CN211668018U CN 211668018 U CN211668018 U CN 211668018U CN 201922352579 U CN201922352579 U CN 201922352579U CN 211668018 U CN211668018 U CN 211668018U
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- water
- boiler
- heat exchanger
- heat exchange
- outlet pipe
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model discloses a boiler system, which comprises a boiler water injection tank, a boiler and a heat exchanger, wherein the boiler water injection tank is connected to the boiler through a water injection pipe, the boiler comprises a boiler water tank and a combustion chamber, and the combustion chamber heats water in the boiler water tank; the waste gas of the combustion chamber is discharged to a heat exchanger through a waste gas discharge pipe to heat water in the heat exchanger, and the water in the heat exchanger is connected to a boiler water injection tank through a heat exchanger water outlet pipe; the water injection pipe and the heat exchanger water outlet pipe are controlled by valves respectively, and the system further comprises a control unit which is connected to the valves for opening and closing the water injection pipe and the heat exchanger water outlet pipe. Adopt the utility model discloses a boiler system, surplus heat in can the make full use of hot flue gas improves boiler system's efficiency, reduces fuel consumption.
Description
Technical Field
The utility model relates to a heat energy exchange equipment among the feed processing equipment especially involves boiler and control system thereof.
Background
The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, and the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy. The boiler is a water container heated on fire, a furnace is a place where fuel is combusted, and the boiler comprises a boiler and a furnace. The hot water or steam generated in the boiler can directly provide heat energy for industrial production and people life, and can also be converted into mechanical energy through a steam power device, or the mechanical energy is converted into electric energy through a generator. The boiler for supplying hot water is called a hot water boiler, is mainly used for life, and has a small amount of application in industrial production. The boiler for generating steam is called as a steam boiler, often called as a boiler for short, and is widely used for thermal power stations, ships, locomotives and industrial and mining enterprises. In the feed processing industry, boilers are also widely used.
The boiler has water tank and combustion chamber, discharges out waste gas (hot flue gas) after the fuel burning in the combustion chamber, among the prior art, hot flue gas is through simply handling or directly discharging without handling, but the temperature of this kind of hot flue gas generally reaches about 160 ~ 250 degrees centigrade, includes a large amount of heats, has consequently formed the waste, has reduced the availability factor of fuel. While allowing water (e.g. natural gas: CH) produced by the combustion of the fuel4+2O2→CO2+2H2O) water vapor in a superheated state in the flue gas, is lost from the chimney with the flue gas. The heat efficiency of the traditional boiler can only reach 85% -91% generally.
SUMMERY OF THE UTILITY MODEL
In order to solve the hot flue gas of boiler emission among the prior art and directly discharge through simply handling or not handling, but the temperature of this kind of hot flue gas generally reaches about 160 ~ 250 degrees centigrade, includes a large amount of heats, has consequently formed the waste, has reduced the technical problem such as availability factor of fuel, the utility model discloses a boiler system has been taken, energy in the hot flue gas of boiler combustion back emission (generally about 160 ~ 250 degrees centigrade) is retrieved through certain device, and the gas temperature of discharging fume after retrieving only has about 60 degrees centigrade, and the thermal efficiency has improved about 10% like this roughly, has just practiced thrift about 10% gas for boiler system naturally, and in the energy recuperation-process, can also reduce harmful gas's emission simultaneously, reduces environmental pollution. In order to realize the technical effect, the utility model discloses following technical scheme has been taken.
A boiler system comprises a boiler water injection tank, a boiler and a heat exchanger, wherein,
the boiler water injection tank is connected to a boiler through a water injection pipe, the boiler comprises a boiler water tank and a combustion chamber, and the combustion chamber heats water in the boiler water tank;
the waste gas of the combustion chamber is discharged to a heat exchanger through a waste gas discharge pipe to heat water in the heat exchanger, and the water in the heat exchanger is connected to a boiler water injection tank through a heat exchanger water outlet pipe;
the water injection pipe and the heat exchanger water outlet pipe are controlled by valves respectively, and the system further comprises a control unit which is connected to the valves for opening and closing the water injection pipe and the heat exchanger water outlet pipe.
Through the above arrangement of the utility model, the sensible heat in the high temperature flue gas discharged from the boiler and the latent heat released by the condensation of the water vapor can be absorbed by the heat exchanger, which is an efficient condensation waste heat recovery device, so as to achieve the purpose of improving the thermal efficiency of the boiler.
When no heat exchanger's ordinary boiler burns natural gas, if the thermal efficiency of boiler calculates for 90% according to fuel low order calorific capacity, adopts the utility model discloses a heat exchanger carries out hot flue gas heat recovery back, and exhaust gas temperature falls to 50 ~ 60 ℃, and the temperature in the water injection case can reach about 40 ℃, and its thermal efficiency then can improve about 107%. If the utility model is adopted, the boiler system saves a lot of operating cost compared with the common hot water boiler. Taking 100 kilocal/h boiler as an example, the natural gas consumption of a common boiler is 126.5Nm3H (natural gas low calorific value of 8500 kcal/Nm)3) The utility model discloses a boiler system natural gas consumption is 110Nm3The natural gas amount is saved by about 10 percent.
Wherein, including the casing in the heat exchanger, hold many heat exchange tubes in the casing, the heat exchange tube is hollow structure, and the water of treating the heating is filled to its hollow portion, many heat exchange tubes constitute multilayer stack structure, and each layer includes more than one heat exchange tube, have the space between the layer and between each heat exchange tube on each layer, exhaust gas discharge pipe follows the access of casing bottom.
Through the utility model discloses an above setting because use a large amount of heat exchange tubes among the heat exchanger, heat exchange tube adopts high thermal conductivity materials such as copper or aluminium to make, consequently has very high heat transfer effect for water in the heat exchange tube is by the intensive heating, has improved efficiency.
The heat exchange tubes in each layer are arranged at intervals according to a regular triangle and an inverted triangle, and the heat exchange tubes between the upper layer and the lower layer are arranged according to a mirror image by taking a horizontal boundary between the upper layer and the lower layer as a boundary.
Through the utility model discloses an above setting for the heat transfer surface area of heat exchange tube further strengthens, can transmit the moisture in the heat exchange tube with more hot flue gas heat.
The shell comprises a heat exchanger, a water outlet pipe and a plurality of heat exchange pipes, wherein the heat exchanger comprises a plurality of heat exchange pipes which are connected to the heat exchanger water outlet pipe together, and a water pump is arranged in the heat exchanger water outlet pipe.
Because many heat exchange tubes's sectional area is very little, water has received mobile influence wherein, and through the utility model discloses an above setting can overcome this point, provides the water pump in the heat exchanger outlet pipe and pressurizes, provides mobile for the heat exchange tube among the heat exchanger.
The water outlet pipe of the heat exchanger comprises a temperature sensor, the temperature sensor is connected to the control unit, and the control unit is connected to the water pump of the water outlet pipe of the heat exchanger.
The heat exchanger also comprises a circulating water tank, water is stored in the circulating water tank, and the circulating water tank comprises a circulating water inlet pipe and a circulating water outlet pipe; wherein circulation water tank is connected to through the circulation inlet tube many heat exchange tube's the end of intaking, do many heat exchange tube input water, many heat exchange tube's play water end is connected to the circulation outlet pipe, will pass through the water input circulation water tank of heat exchange heating, include the water pump in circulation inlet tube or the circulation outlet pipe.
Adopt the utility model discloses an above setting can heat the water in the circulating water tank repeatedly, has improved the temperature of heat exchanger outlet pipe from this, has improved the temperature in the water injection case promptly.
The heat exchanger shell is characterized in that the heat exchanger shell inner wall is provided with a heat insulation layer, and no gap is formed between the heat insulation layer of the shell inner wall and the heat exchange tube at the outermost side of each layer.
Adopt the utility model discloses an above setting can avoid the heat in the hot flue gas to scatter and disappear along the casing is inside, has improved the thermal utilization efficiency in the hot flue gas of boiler system.
Drawings
Fig. 1 is a schematic diagram of an overall structure of a boiler system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an internal structure of a heat exchanger of a boiler system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Detailed exemplary embodiments are disclosed below. However, specific structural and functional details disclosed herein are merely for purposes of describing example embodiments.
It should be understood, however, that the invention is not to be limited to the particular exemplary embodiments disclosed, but to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure. Like reference numerals refer to like elements throughout the description of the figures.
Referring to the drawings, the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function and the achievable purpose of the present invention. Meanwhile, the position limitation terms cited in the present specification are for clarity of description only, and are not intended to limit the scope of the present invention, and the changes or adjustments of the relative relationship thereof should be considered as the scope of the present invention without substantial changes in the technical content.
It will also be understood that the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. It will be further understood that when an element or unit is referred to as being "connected" or "coupled" to another element or unit, it can be directly connected or coupled to the other element or unit or intervening elements or units may also be present. Moreover, other words used to describe the relationship between components or elements should be understood in the same manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.).
Fig. 1 is a schematic diagram of an overall structure of a boiler system according to an embodiment of the present invention. As shown, the present embodiment comprises a boiler system comprising a boiler water tank 10, a boiler 20, and a heat exchanger 302, wherein,
the boiler water injection tank 10 is connected to a boiler 20 through a water injection pipe 101, the boiler 20 comprises a boiler water tank 201 and a combustion chamber 202, and the combustion chamber 202 heats water in the boiler water tank 201, for example, by using natural gas for combustion;
the waste gas of the combustion chamber 202 is discharged to a heat exchanger 302 through a waste gas discharge pipe 301 to heat water in the heat exchanger 302, and the water in the heat exchanger 302 is connected to a boiler water injection tank 10 through a heat exchanger water outlet pipe 303;
the water injection pipe 101 and the heat exchanger water outlet pipe 303 are controlled by valves respectively, the system further comprises a control unit 40, and the control unit 40 is connected to the valves for opening and closing the water injection pipe 101 and the heat exchanger water outlet pipe 303.
Through the above arrangement of the embodiment of the present invention, the heat exchanger, which is an efficient condensation waste heat recovery device, can be used to absorb the sensible heat in the high temperature flue gas discharged from the boiler and the latent heat released by the condensation of the water vapor, so as to achieve the purpose of improving the thermal efficiency of the boiler.
When no heat exchanger's ordinary boiler burns natural gas, if the thermal efficiency of boiler calculates for 90% according to fuel low order calorific capacity, adopts the utility model discloses a heat exchanger carries out hot flue gas heat recovery back, and exhaust gas temperature falls to 50 ~ 60 ℃, and the temperature in the water injection case can reach about 40 ℃, and its thermal efficiency then can improve about 107%. If the utility model is adopted, the boiler system saves a lot of operating cost compared with the common hot water boiler. Taking 100 kilocal/h boiler as an example, the natural gas consumption of a common boiler is 126.5Nm3H (natural gas low calorific value of 8500 kcal/Nm)3) The utility model discloses a boiler system natural gas consumption is 110Nm3The natural gas amount is saved by about 10 percent.
Fig. 2 is a schematic diagram of an internal structure of a heat exchanger of a boiler system according to an embodiment of the present invention. As shown in the drawings, in a specific embodiment of the present invention, the heat exchanger 302 includes a housing 3021 therein, a plurality of heat exchange tubes 3022 are accommodated in the housing 3021, the heat exchange tubes 3022 are hollow, a hollow portion 30221 thereof is filled with water to be heated, the heat exchange tubes 3022 constitute a multi-layer stacked structure, each layer includes more than one heat exchange tube 3022, gaps are provided between layers and between each heat exchange tube 3022, and the exhaust gas discharge pipe 301 is inserted from the bottom end of the housing 3021, for example, enters the interior of the housing 3021 through an exhaust gas inlet 30211.
Through the utility model discloses above setting among the specific embodiment, because use a large amount of heat exchange tube 3022 among the heat exchanger 302, heat exchange tube 3022 adopts high thermal conductivity materials such as copper or aluminium to make, consequently has very high heat transfer effect for water in the heat exchange tube 3022 is fully heated, has improved boiler system's overall efficiency.
In a specific embodiment of the present invention, the cross-sectional shape of the heat exchanging pipe 3022 is generally triangular, the middle portion of the heat exchanging pipe 3022 has a triangular hollow portion 30221, three vertexes of the triangle respectively have two extending portions 30222 extending along each side direction, the heat exchanging pipe 3022 in each layer is disposed according to the regular triangle and the inverted triangle, and each heat exchanging pipe 3022 between the upper and lower adjacent layers is disposed according to the mirror image according to the horizontal boundary between the upper and lower layers.
Through the utility model discloses above setting among the specific embodiment for heat exchange tube 3022's heat transfer surface area further strengthens, can give the moisture in the heat exchange tube 3022 more hot flue gas heat transfer.
In a specific embodiment of the present invention, a plurality of heat exchange pipes 3022 included in the housing 3021 are commonly connected to the heat exchanger outlet pipe 303, and a water pump is provided in the heat exchanger outlet pipe 303.
Because many heat exchange tube 3022's sectional area is very little, the flow of water therein has received the influence of mobility, and through the utility model discloses an above setting can overcome this problem, provides the water pump in heat exchanger outlet pipe 303 and pressurizes, provides mobility for heat exchange tube 3022 among heat exchanger 302.
In a specific embodiment of the present invention, the heat exchanger outlet pipe 303 includes a temperature sensor therein, the temperature sensor is connected to the control unit 40, and the control unit 40 is connected to the water pump of the heat exchanger outlet pipe 303.
In a specific embodiment of the present invention, the heat exchanger 302 further includes a circulating water tank, water is stored in the circulating water tank, and the circulating water tank includes a circulating water inlet pipe and a circulating water outlet pipe; wherein circulation water tank is connected to through the circulation inlet tube many heat exchange tube 3022's the end of intaking, does many heat exchange tube 3022 input water, many heat exchange tube 3022's the water outlet end is connected to the circulation outlet pipe, will pass through the water input circulation water tank of heat exchange heating, include the water pump in circulation inlet tube or the circulation outlet pipe.
Through the utility model discloses above setting among the specific embodiment, can heat the water in the circulating water tank repeatedly, improved the temperature of heat exchanger outlet pipe 303 from this, improved the temperature in the water injection tank 10 promptly.
In one embodiment of the present invention, the heat exchanger shell 3021 has a heat insulating layer on the inner wall, and there is no space between the heat insulating layer on the inner wall of the shell 3021 and the outermost heat exchange tubes 3022 on each layer.
Through the utility model discloses above setting among the specific embodiment, can avoid the heat in the hot flue gas to scatter and disappear along inside casing 3021, improved the thermal utilization efficiency in the hot flue gas of boiler system.
While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (7)
1. A boiler system comprises a boiler water injection tank, a boiler and a heat exchanger, wherein,
the boiler water injection tank is connected to a boiler through a water injection pipe, the boiler comprises a boiler water tank and a combustion chamber, and the combustion chamber heats water in the boiler water tank;
the waste gas of the combustion chamber is discharged to a heat exchanger through a waste gas discharge pipe to heat water in the heat exchanger, and the water in the heat exchanger is connected to a boiler water injection tank through a heat exchanger water outlet pipe;
the water injection pipe and the heat exchanger water outlet pipe are controlled by valves respectively, and the system further comprises a control unit which is connected to the valves for opening and closing the water injection pipe and the heat exchanger water outlet pipe.
2. The boiler system according to claim 1, wherein the heat exchanger includes a housing, the housing accommodating a plurality of heat exchange tubes therein, the heat exchange tubes having a hollow structure in which a hollow portion is filled with water to be heated, the plurality of heat exchange tubes constituting a multi-layered stacked structure, each layer including more than one heat exchange tube, the layers and the heat exchange tubes of each layer having a gap therebetween, the exhaust gas discharge pipe being accessed from a bottom end of the housing.
3. The boiler system according to claim 2, wherein the heat exchange tubes have a generally triangular cross-sectional shape, a hollow portion of the triangle being formed at a center portion thereof, three apexes of the triangle each having two extensions extending in respective side directions, the heat exchange tubes in each layer being arranged in a regular triangle spaced apart from an inverted triangle, and the heat exchange tubes in adjacent layers being arranged in mirror images bounded by horizontal boundary lines between the upper and lower layers.
4. The boiler system according to claim 2, wherein a plurality of heat exchange tubes included in the housing are commonly connected to a heat exchanger outlet pipe having a water pump therein.
5. The boiler system according to claim 4, wherein the heat exchanger outlet pipe comprises a temperature sensor therein, the temperature sensor being connected to the control unit, the control unit being connected to the water pump of the heat exchanger outlet pipe.
6. The boiler system according to claim 2, wherein the heat exchanger further comprises a circulation tank, the circulation tank storing water therein, the circulation tank comprising a circulation inlet pipe and a circulation outlet pipe; wherein circulation water tank is connected to through the circulation inlet tube many heat exchange tube's the end of intaking, do many heat exchange tube input water, many heat exchange tube's play water end is connected to the circulation outlet pipe, will pass through the water input circulation water tank of heat exchange heating, include the water pump in circulation inlet tube or the circulation outlet pipe.
7. The boiler system according to claim 2, wherein the heat exchanger shell has an insulation layer on the inner wall of the shell, and the insulation layer has no gap with the outermost heat exchange tubes of each layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922352579.9U CN211668018U (en) | 2019-12-24 | 2019-12-24 | Boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922352579.9U CN211668018U (en) | 2019-12-24 | 2019-12-24 | Boiler system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211668018U true CN211668018U (en) | 2020-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922352579.9U Active CN211668018U (en) | 2019-12-24 | 2019-12-24 | Boiler system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211668018U (en) |
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2019
- 2019-12-24 CN CN201922352579.9U patent/CN211668018U/en active Active
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