Hot air type condensation steam boiler and energy-saving heat supply system
By adopting a curved flue and inclined partitions in the steam boiler, the flow direction of flue gas and air is changed, creating a buffer effect and recovering waste heat from the flue gas. This solves the problems of unstable wind speed and high exhaust temperature, achieving a more efficient energy-saving effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-03-24
AI Technical Summary
In existing steam boilers, the air preheater and flue gas discharge pipe are straight pipes, which leads to unstable air velocity, affects the uniformity and stability of combustion, occupies a large space, and has a high flue gas temperature, which is not conducive to energy saving.
The hot air condensing steam boiler adopts a bend flue and inclined partition components to change the direction of flue gas discharge and air intake. Combined with the arc-shaped air duct design, it forms a buffer effect and uses the inclined partition components to exchange waste heat of flue gas, thereby reducing the exhaust temperature.
It improves the stability of air velocity, enhances the recovery and utilization of flue gas, reduces the exhaust temperature, saves boiler room space, and reduces construction costs.
Smart Images
Figure CN224033776U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a steam boiler technical field, concretely relates to a hot air type condensing steam boiler and energy -conserving heating system. BACKGROUND
[0002] Steam boiler is a kind of with fuel gas, fuel oil etc. as fuel and air combustion, to system water heating, make it provide hot water / high temperature steam for user's equipment.
[0003] At present, in order to respond to the requirement of national energy saving and emission reduction, the flue gas recovery equipment is usually arranged, the waste heat of discharged flue gas is recycled, such as condenser, economizer etc., and the air preheater is also set up by technology, air is preheated, on the one hand, the exhaust temperature of flue gas can be reduced, on the other hand, the temperature of air can be improved, so that it burns better in furnace, to improve the combustion temperature of mixed gas better.
[0004] In the prior art, the air preheater is arranged between the condenser and the economizer, and is connected with the burner through the hot air pipe, in the above structure, since the air inlet pipe is straight pipe type, although there is the buffering effect of air preheater, but the wind speed is still high or airflow speed is unstable, air entering the burner after air entering the burner, the uniformity and stability of combustion are easily affected, similarly, the flue gas discharge pipe is also straight pipe type, and the rapid discharge of flue gas is not conducive to the heat exchange of flue gas, in addition, the air pipe communicated with the air preheater is usually arranged separately and is arranged outside the boiler, after being arranged in this way, the space of boiler room is greatly occupied, and it is also not beautiful, the air pipe needs to be constructed on site, which easily increases the workload of on-site construction, greatly increases the cost of on-site construction, and the exhaust gas temperature of the structure arranged in this way is still high, is 60 DEG C-120 DEG C, which is not conducive to energy saving. UTILITY MODEL CONTENTS
[0005] In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a hot air type condensing steam boiler, to solve the above-mentioned traditional problems.
[0006] The second purpose of the utility model is to provide an energy-saving heating system using the hot air type condensing steam boiler.
[0007] One of the purposes of the utility model is realized by the following technical scheme:
[0008] The utility model provides a hot -blast type condensing steam boiler, including base, boiler body, the elbow flue that arranges in the upside of boiler body, heat recovery assembly and air flue, the flue gas discharge port of boiler body is connected with heat recovery assembly through the elbow flue, and heat recovery assembly includes energy saving device, air preheater, condenser and smoke outlet in turn along the smoke flow direction arrangement, the smoke outlet is equipped with the inclined separation part, the inclined separation part will be divided into smoke outlet and air inlet, the smoke outlet is roughly vertically arranged with the smoke direction of the smoke outlet and the air inlet direction, the air inlet direction and the air outlet direction of the smoke outlet are roughly vertically arranged, the air flue is arranged below heat recovery assembly, and the air flue includes first air flue, second air flue and third air flue, the air inlet of first air flue is connected with air inlet, the air outlet of first air flue and the air inlet of second air flue are connected with the shell side of air preheater respectively, and the second air flue is connected with boiler body through third air flue.
[0009] Preferably, one side of the air flue is arc-shaped and closely arranged with the boiler body in the cross section.
[0010] Preferably, the exhaust volume of the smoke outlet is greater than the air inlet volume of the air inlet.
[0011] Preferably, the exhaust volume of the smoke outlet is 1.1-1.6 times the air inlet volume of the air inlet.
[0012] Preferably, the inclined separation part is one of a steel plate coated with a carbon fiber coating and / or a multi-walled carbon nanotube coating, and a heat exchange copper pipe.
[0013] Preferably, the boiler body is a horizontal internal combustion two-pass wet back type structure.
[0014] Preferably, the boiler body is provided with a burner, a furnace, a back-pumping chamber, a threaded smoke pipe, and a front smoke box, the burner is arranged on the front side of the boiler body and is connected with the inner cavity of the furnace, the furnace is horizontally arranged at the lower part of the boiler body, the back-pumping chamber is arranged at the rear side of the furnace, the threaded smoke pipe is horizontally arranged at the upper part of the furnace and is connected with the back-pumping chamber, and the front smoke box is arranged at the front side of the boiler body and is connected with the threaded smoke pipe.
[0015] Preferably, helical finned tubes are arranged in the energy saving device and the condenser, and threaded heat exchange pipes are arranged in the air preheater.
[0016] Preferably, an air filter and / or a silencer are further arranged between the third air flue and the boiler body.
[0017] The second purpose of the utility model is achieved by the following technical scheme:
[0018] An energy-saving heating system comprises the hot-blast type condensing steam boiler.
[0019] Compared with the prior art, the hot air type condensing steam boiler has the beneficial effects that:
[0020] The hot air type condensing steam boiler has the beneficial effects that: the structure of the smoke outlet is improved, the smoke outlet direction and the air inlet direction are changed, a certain buffering effect is formed, the stability of the air speed and the recycling of the flue gas are ensured, and the waste heat of the flue gas can be exchanged through the inclined separation component, so that the exhaust gas temperature is further reduced. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 The side structure of the hot air type condensing steam boiler is shown in the figure.
[0022] Figure 2 The side structure of the hot air type condensing steam boiler is shown in the figure. Figure 1 The top view of the hot air type condensing steam boiler is shown in the figure.
[0023] Figure 3 The front view of the hot air type condensing steam boiler is shown in the figure. Figure 1 The front view of the hot air type condensing steam boiler is shown in the figure.
[0024] Figure 4 The transverse cross-sectional view of the hot air type condensing steam boiler is shown in the figure. Figure 1 The transverse cross-sectional view of the hot air type condensing steam boiler is shown in the figure.
[0025] Figure 5 The first longitudinal cross-sectional view of the hot air type condensing steam boiler is shown in the figure. Figure 1 The first longitudinal cross-sectional view of the hot air type condensing steam boiler is shown in the figure.
[0026] Figure 6 The second longitudinal cross-sectional view of the hot air type condensing steam boiler is shown in the figure. Figure 1 The second longitudinal cross-sectional view of the hot air type condensing steam boiler is shown in the figure.
[0027] In the figure: 10, boiler body; 20, turning flue; 30, heat recovery component; 31, economizer; 32, air preheater; 33, condenser; 34, smoke outlet; 340, inclined separation component; 40, air duct; 41, first air duct; 42, second air duct; 43, third air duct. DETAILED DESCRIPTION
[0028] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, many specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0029] In the description of the utility model, it needs to be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0030] In the description of the utility model, it needs to be understood that when one element is considered to be "connected" to another element, it can be directly connected to another element or there can be intermediate elements. On the contrary, when the element is called "directly" connected to another element, there is no intermediate element.
[0031] Please refer to Figures 1-6 , the hot air type condensing steam boiler of a preferred embodiment of the utility model, for installing on an energy saving heating system, for the user to provide hot water / high temperature steam, specifically, the hot air type condensing steam boiler includes base, boiler body 10, the elbow flue 20 arranged on the upper side of boiler body 10, heat recovery assembly 30 and air duct 40, the flue gas discharge port of boiler body 10 is communicated with heat recovery assembly 30 through elbow flue 20, heat recovery assembly 30 includes energy saving device 31, air preheater 32, condenser 33 and smoke outlet 34 arranged in turn along the flue gas flow direction;Smoke outlet 34 is provided with inclined separation component 340, inclined separation component 340 divides smoke outlet 34 into flue gas outlet and air inlet, the smoke direction of flue gas outlet and the smoke direction are substantially perpendicular to set, the air inflow direction of flue gas outlet and the air outflow direction are substantially perpendicular to set;Air duct 40 is arranged below heat recovery assembly 30, air duct 40 includes first air duct 41, second air duct 42 and third air duct 43, the air inlet of first air duct 41 is communicated with air inlet, the air outlet of first air duct 41, the air inlet of second air duct 42 are respectively communicated with the shell side of air preheater 32, and the second air duct 42 is connected with the boiler body 10 through the third air duct 43.
[0032] The hot air type condensing steam boiler described above changes the flue gas smoke direction and the air inlet direction by improving the structure of smoke outlet 34, forms a certain buffer effect, to ensure the stability of air speed and the recycling of flue gas, and at the same time, the waste heat of flue gas can be exchanged through inclined separation component 340 to further reduce the exhaust gas temperature.
[0033] In this embodiment, one side of air duct 40 is arc-shaped and closely arranged on boiler body 10 in cross section, so that air duct 40 and boiler body 10 can be integrally arranged before leaving the factory, so as to save the occupied space of boiler room and better the appearance.
[0034] In the embodiment, the exhaust volume of the flue gas outlet is larger than the intake volume of the air inlet, which facilitates the discharge of flue gas and the preheating of air to the required temperature by more flue gas. Alternatively, the exhaust volume of the flue gas outlet is 1.1-1.6 times, such as 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, etc., of the intake volume of the air inlet.
[0035] In another embodiment, the inclined partition member 340 is made of a material with good heat conductivity, and further, the inclined partition member 340 is one of a steel plate coated with a carbon fiber coating and / or a multi-walled carbon nanotube coating on both sides, a heat exchange copper pipe, or other heat conductive materials, so as to facilitate the heat exchange between flue gas and air, and the heat exchange between the two after colliding on both sides of the inclined partition member 340.
[0036] In the embodiment, the boiler body 10 is a horizontal internal combustion two-pass wet back type structure. Specifically, the boiler body 10 is provided with a burner, a furnace, a back pass chamber, a threaded smoke pipe, and a front smoke box. The burner is arranged on the front side of the boiler body 10 and communicates with the inner cavity of the furnace. The furnace is horizontally arranged at the lower part of the boiler body 10. The back pass chamber is arranged at the rear side of the furnace. The threaded smoke pipe is horizontally arranged at the upper part of the furnace and communicates with the back pass chamber. The front smoke box is arranged on the front side of the boiler body 10 and communicates with the threaded smoke pipe.
[0037] In one embodiment, the energy saver 31 and the condenser 33 are each provided with a spiral finned tube, and the air preheater is provided with a threaded heat exchange pipe.
[0038] In other embodiments, an air filter and / or a silencer (not shown in the figure) are further arranged between the third air duct 43 and the boiler body 10. The air filter can filter the air, and the silencer can perform silencing.
[0039] In other embodiments, the boiler body 10 is further provided with an outer thermal insulation, a rear panel, a platform escalator, a valve instrument, a water pump, and a blast door. The above-mentioned arrangements facilitate subsequent management.
[0040] The principle of the boiler is as follows:
[0041] 1. Flue gas process: The boiler uses a gas combustion device. Fuel gas is sprayed from the burner into the furnace to burn at a slightly positive pressure. The high-temperature flue gas generated by combustion is radiantly heat exchanged in the first-pass furnace, enters the second-pass threaded smoke pipe through the back pass chamber, flows from back to front in the threaded smoke pipe to the front smoke box, and then turns to enter the energy saver 31, and then sequentially flows through the air preheater, the condenser 33, and then through the smoke outlet 34 to turn upward by 90° and connect with the external smoke exhaust pipe to be discharged to the atmosphere. The condensed water condensed in the energy saver 31, the air preheater, the condenser 33, and the smoke outlet 34 is collected and flows back to the condenser 33, and finally flows out from the water collecting tray at the bottom of the condenser 33.
[0042] 2. Air flow: the air required for fuel combustion flows from the right upper part of the furnace into the air inlet of the smoke outlet 34, is preheated, turns 90° downward, enters the first air duct 41, flows along the first air duct 41 from back to front into the air inlet chamber at the bottom of the air preheater 32, turns 90° upward in the air inlet chamber of the air preheater 32, enters the air preheater 32, turns 180° in the air preheater 32 after heat exchange with the heat exchange pipes in the air preheater 32, enters the air outlet chamber at the lower part of the air preheater 32, turns 90° in the air outlet chamber of the air preheater 32 after the hot air is heated, enters the second air duct 42, flows along the second air duct 42 from back to front, flows into the third air duct 43, reaches the hot air turning chamber near the front smoke box, turns 90° downward, leaves the boiler body 10, and is introduced into the burner through the on-site furnace front air duct 40 to participate in the combustion of fuel.
[0043] Water flow: the high-temperature deoxygenated make-up water of the boiler enters the economizer 31 through the boiler feed water pump to exchange heat and absorb heat from the flue gas, and the heated boiler make-up water directly enters the boiler body 10. The system make-up water is sent into the condenser 33 through the make-up water pump to absorb heat, absorbs the sensible heat and condensation latent heat in the low-temperature flue gas, and the heated water enters the deaerator to be deoxygenated and serves as the make-up water of the boiler.
[0044] The technical features of the above-described embodiments can be combined in any manner. To make the description brief, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered as falling within the scope of the present disclosure.
[0045] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all fall within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.
Claims
1. A hot air condensing steam boiler, characterized in that, The system includes a base, a boiler body, a curved flue arranged on the upper side of the boiler body, a heat recovery assembly, and an air duct. The flue gas outlet of the boiler body is connected to the heat recovery assembly through the curved flue. The heat recovery assembly includes an economizer, an air preheater, a condenser, and a flue gas outlet arranged sequentially along the flue gas flow direction. The flue gas outlet is provided with an inclined partition, which divides the flue gas outlet into a flue gas outlet and an air inlet. The flue gas outlet's outlet direction is approximately perpendicular to the inlet direction, and the air inlet direction is approximately perpendicular to the outlet direction. The air duct is located below the heat recovery assembly and includes a first air duct, a second air duct, and a third air duct. The air inlet of the first air duct is connected to the air inlet, and the air outlets of the first and second air ducts are respectively connected to the shell side of the air preheater. The second air duct is connected to the boiler body through the third air duct.
2. The hot air condensing steam boiler according to claim 1, characterized in that, In cross-section, one side of the air duct is arc-shaped and is set close to the boiler body.
3. The hot air condensing steam boiler according to claim 1, characterized in that, The exhaust volume of the flue gas outlet is greater than the intake volume of the air inlet.
4. The hot air condensing steam boiler according to claim 3, characterized in that, The exhaust volume of the flue gas outlet is 1.1-1.6 times the intake volume of the air inlet.
5. The hot air condensing steam boiler according to claim 1, characterized in that, The inclined separating component is one of a steel plate or a heat exchange copper tube coated with carbon fiber coating and / or doped with multi-walled carbon nanotube coating on both sides.
6. The hot air condensing steam boiler according to claim 1, characterized in that, The boiler body is a horizontal, internal combustion, two-pass, wet-back structure.
7. The hot air condensing steam boiler according to claim 6, characterized in that, The boiler body is provided with a burner, a furnace shell, a combustion chamber, a threaded smoke pipe and a front smoke box. The burner is located on the front side of the boiler body and is connected to the inner cavity of the furnace shell. The furnace shell is horizontally placed at the lower part of the boiler body. The combustion chamber is located at the rear side of the furnace shell. The threaded smoke pipe is horizontally placed at the upper part of the furnace shell and is connected to the combustion chamber. The front smoke box is located on the front side of the boiler body and is connected to the threaded smoke pipe.
8. The hot air condensing steam boiler according to claim 1, characterized in that, Both the energy saver and the condenser are equipped with spiral finned tubes.
9. The hot air condensing steam boiler according to claim 1, characterized in that, An air filter and / or silencer are also provided between the third air duct and the boiler body.
10. An energy-saving heating system, characterized in that, Including the hot air condensing steam boiler as described in any one of claims 1-9.