Steam boiler with superheater
By adopting a combined structure of corrugated furnace gallbladder, threaded smoke pipe, superheater and condenser in the steam boiler, the problems of low thermal energy utilization, high smoke exhaust temperature and large pollutant emissions in traditional steam boilers are solved, and efficient, environmentally friendly and energy-saving steam supply is achieved.
Patent Information
- Application Number
- CN202420628925.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-03-29
AI Technical Summary
During the combustion process of traditional steam boilers, due to the limitations of the furnace body structure and heat exchange method, there are problems such as low thermal energy utilization, high smoke exhaust temperature, and large pollutant emissions.
A steam boiler with superheater was designed, using corrugated furnace gallbladder and threaded smoke pipe structure to increase the smoke residence time and heat exchange area, introduce the superheater to increase the steam temperature and pressure, and recover the waste heat through the condenser to reduce the smoke exhaust temperature.
It improves thermal energy utilization, reduces smoke exhaust temperature and pollutant emissions, meets the demand for high-quality steam, and reduces energy consumption and operating costs.
Smart Images
Figure CN222559996U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boilers, in particular to a steam boiler with a superheater. Background Art
[0002] As an important thermal energy equipment, steam boilers are widely used in industrial, commercial and civil fields to provide steam for various production and life processes. With the development of science and technology and the improvement of environmental protection requirements, higher requirements are also put forward for the performance and efficiency of steam boilers.
[0003] During the combustion process, traditional steam boilers often have problems such as low thermal energy utilization, high exhaust temperature, and large pollutant emissions due to the limitations of the furnace structure and heat exchange method. Utility Model Content
[0004] The utility model aims to provide a steam boiler with a superheater to solve the problems of low thermal energy utilization, high exhaust gas temperature, large pollutant emissions, etc. in the combustion process of traditional steam boilers proposed in the above background technology due to the limitations of the furnace structure and the heat exchange method.
[0005] To achieve the above-mentioned purpose, the utility model provides a steam boiler with a superheater, comprising a furnace body, a corrugated furnace liner is arranged inside the furnace body, a burner is installed at one end of the furnace body, a corrugated furnace liner is installed inside the furnace body, one end of the corrugated furnace liner is connected to a reburning chamber, a threaded smoke pipe is connected to the upper part of the reburning chamber, one end of the threaded smoke pipe is connected to a front smoke box, a superheater and a condenser are installed on the top of the furnace body, and one side of the superheater is connected to the front smoke box through a connecting flue.
[0006] Preferably, a sewage pipe is connected to one end of the bottom of the furnace body, an explosion-proof door is installed at one end of the furnace body, and a safety valve and a manhole are installed at the top of the furnace body.
[0007] Preferably, a water level gauge, a pressure gauge and a platform ladder are installed on the outside of the furnace body, and a base is installed on the bottom of the furnace body.
[0008] Preferably, a water supply pump is provided outside the furnace body, and the water supply pump is connected to the furnace body and the condenser through a water supply pipe.
[0009] Preferably, the end of the corrugated furnace core is connected to the inner wall of the furnace body through a straight pull rod, and the upper part of the corrugated furnace core is connected to the inner wall of the furnace body through an oblique support rod.
[0010] Preferably, the top of the condenser is connected to the air inlet of the burner through a circulation pipeline.
[0011] Preferably, a steam outlet is installed on the top of the superheater, and the top of the superheater is connected to the top of the furnace body through a steam pipeline. A superheater is arranged inside the superheater, one end of the superheater is connected to the steam pipeline, and the other end is connected to the steam outlet.
[0012] Preferably, a chimney is connected to the outer side of the condenser.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] In this steam boiler with superheater, the corrugated furnace and threaded smoke pipe are set to increase the residence time and heat exchange area of flue gas in the furnace, so that heat can be more fully transferred to water, and the utilization rate of thermal energy is improved. In addition, the introduction of the superheater further increases the temperature and pressure of steam, making it have higher thermal energy and work capacity, meeting the needs of various industrial and living fields for high-quality steam. Through the setting of the condenser, the waste heat and moisture in the flue gas are effectively recovered, the exhaust temperature is reduced, and the heat loss is reduced. This not only improves the thermal efficiency of the boiler, but also reduces energy consumption and operating costs. At the same time, the harmful substances in the flue gas are further purified, reducing pollution to the environment. The steam boiler is also equipped with complete safety facilities and protection devices, such as safety valves, explosion-proof doors, and sewage pipes, to ensure the safe and stable operation of the boiler. At the same time, the setting of auxiliary equipment such as water level gauges, pressure gauges, and platform escalators facilitates the operator to monitor and maintain the boiler. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a front view structural schematic diagram of the utility model;
[0016] Figure 2 It is a side view structural schematic diagram of the utility model;
[0017] Figure 3 It is a schematic diagram of the top structure of the utility model.
[0018] The meaning of each number in the figure is:
[0019] 1. Furnace body; 11. Drain pipe; 12. Explosion-proof door; 13. Safety valve; 14. Manhole; 15. Circulation pipeline; 16. Steam pipeline; 17. Water level gauge; 18. Pressure gauge; 19. Platform escalator; 110. Water pump; 111. Water pipe; 2. Corrugated furnace; 21. Straight pull rod; 22. Diagonal support rod; 3. Backfire chamber; 4. Threaded smoke pipe; 5. Burner; 6. Base; 7. Front smoke box; 8. Connecting flue; 9. Superheater; 91. Steam outlet; 10. Condenser; 101. Chimney. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] The utility model provides a steam boiler with a superheater, such as Figure 1-Figure 3 As shown, it includes a furnace body 1, a corrugated furnace liner 2 is arranged inside the furnace body 1, a burner 5 is installed at one end of the furnace body 1, a corrugated furnace liner 2 is installed inside the furnace body 1, one end of the corrugated furnace liner 2 is connected to a backfire chamber 3, the upper part of the backfire chamber 3 is connected to a threaded smoke pipe 4, one end of the threaded smoke pipe 4 is connected to a front smoke box 7, a superheater 9 and a condenser 10 are installed on the top of the furnace body 1, one side of the superheater 9 is connected to the front smoke box 7 through a connecting flue 8, the threaded smoke pipes 4 are densely arranged in parallel, and the densely arranged threaded smoke pipes increase the heat exchange stroke and time between the flue gas and water, strengthen the convective heat transfer, reduce the exhaust temperature of the boiler, improve the thermal efficiency, and save fuel. The combustion chamber adopts the structure of a corrugated furnace 2, which not only strengthens the disturbance of the flue gas, but also increases the radiation heat transfer area; it not only increases the rigidity of the furnace, but also effectively weakens the expansion stress of the furnace; it not only enhances the heat transfer effect, but also promotes the combustion of fuel in the furnace. The saturated steam in the superheater tube in the superheater 9 absorbs the high-temperature flue gas, heats up to superheated steam and is transported to the heat user, and further reduces the temperature of the flue gas before entering the condenser 10, that is, the flue gas outlet of the superheater 9 is connected to the condenser 10, the flue gas is deeply cooled in the condenser 10, the softened water in the water inlet pipe is heated, and the heated water is returned to the boiler to increase the water inlet temperature, thereby achieving the purpose of energy saving.
[0022] In this embodiment, a sewage pipe 11 is connected to one end of the bottom of the furnace body 1, an explosion-proof door 12 is installed at one end of the furnace body 1, a safety valve 13 and a manhole 14 are installed on the top of the furnace body 1, and the cylinder of the explosion-proof door 12 is connected to the rear tube plate of the reburning chamber 3, which is convenient for inspection and maintenance of the boiler.
[0023] Specifically, a water level gauge 17, a pressure gauge 18 and a platform escalator 19 are installed on the outside of the furnace body 1, and a base 6 is installed at the bottom of the furnace body 1. The water level gauge 17 and the pressure gauge 18 can know the water level and pressure in the gas boiler in real time. When the water level and pressure are abnormal, the staff will be informed through the alarm, thereby improving the safety of the gas boiler.
[0024] Furthermore, a water supply pump 110 is disposed outside the furnace body 1 , and the water supply pump 110 is connected to the furnace body 1 and the condenser 10 through a water supply pipe 111 .
[0025] Furthermore, the end of the corrugated furnace liner 2 is connected to the inner wall of the furnace body 1 through a straight pull rod 21, and the upper part of the corrugated furnace liner 2 is connected to the inner wall of the furnace body 1 through a diagonal support rod 22. The diagonal support rod 22 and the straight pull rod 21 play a role in enhancing the strength of the gas boiler, while not interfering with the threaded smoke pipe, furnace liner and other components, thereby improving the safety of the gas boiler.
[0026] Furthermore, the top of the condenser 10 is connected to the air inlet of the burner 5 through a circulation pipeline 15. A portion of the flue gas is diverted from the smoke exhaust port of the boiler through a circulation pipeline 15 back to the air intake port of the burner 5 and added to the furnace for recirculation, which can lower the combustion temperature and the oxygen partial pressure, thereby effectively reducing NOx generation, achieving the purpose of low nitrogen emissions, and meeting environmental protection requirements.
[0027] Furthermore, a steam outlet 91 is installed at the top of the superheater 9, and the top of the superheater 9 is connected to the top of the furnace body 1 through the steam pipeline 16. A superheating pipe is arranged inside the superheater 9, one end of the superheating pipe is connected to the steam pipeline 16, and the other end is connected to the steam outlet 91.
[0028] Furthermore, a chimney 101 is connected to the outside of the condenser 10 to facilitate the exhaust of smoke.
[0029] It is worth noting that the superheater 9 and condenser 10 are installed on the upper part of the boiler, without occupying any space, and the condensed water on the heat transfer surface can be discharged naturally. The superheater 9 and condenser 10 are compact in structure and easy to install; the superheater tube in the superheater 9 is made of alloy steel to meet the requirements that the superheater tube and steam pipe metal have sufficiently high creep strength, lasting strength and lasting plasticity; the superheater tube metal has good stability of organizational properties during long-term operation at high temperature; and the oxidation depth of the superheater tube metal at the operating temperature (i.e., tube wall temperature) should be less than 0.1 mm / year. The condenser 10 is made of high-quality sulfuric acid dew point corrosion-resistant steel 09CrCuSb (ND steel) spiral fin tubes, which have a long service life.
[0030] When the steam boiler with superheater of the utility model is in use, the fuel is first burned inside the furnace body 1 through the burner 5 to generate high-temperature flue gas. The flue gas first enters the corrugated furnace 2. Under the action of the corrugated furnace 2, the flue gas is disturbed and the radiation heat transfer is enhanced, so that the heat is more effectively transferred to the boiler water. Subsequently, the flue gas enters the reburner 3 and further passes through the threaded flue pipe 4. These densely parallel arranged threaded flue pipes increase the heat exchange stroke and time between the flue gas and the water, thereby improving the thermal efficiency. Next, the flue gas enters the superheater 9, where the saturated steam enters the superheater tube in the superheater 9 through the steam pipeline 16. The superheater tube absorbs the heat of the high-temperature flue gas and heats up to become superheated steam. The superheated steam is then transported to the heat user through the steam outlet 91. After passing through the superheater 9, the temperature of the flue gas is further reduced, and then it enters the condenser 10. In the condenser 10, the flue gas exchanges heat with the softened water in the water inlet pipe, transfers the heat to the water, and heats the water. The heated water is returned to the boiler, which increases the water inlet temperature, thereby achieving the purpose of energy saving. At the same time, the condenser 10 also guides a part of the flue gas back to the air inlet of the burner 5 through the circulation pipeline 15 to recirculate the flue gas to reduce the combustion temperature and oxygen partial pressure, reduce the generation of NOx, and meet environmental protection requirements.
[0031] During the entire operation process, the bottom drain pipe 11 of the furnace body 1 is used to regularly discharge dirt and impurities in the boiler. The water level gauge 17 and the pressure gauge 18 monitor the water level and pressure in the boiler in real time to ensure the safe operation of the boiler. Safety facilities such as the explosion-proof door 12, the safety valve 13 and the manhole 14 provide additional safety protection.
[0032] In addition, the water supply pump 110 supplies water to the boiler and the condenser 10 through the water supply pipe 111 to ensure the normal operation of the boiler and the cooling effect of the condenser. The end and the upper part of the corrugated furnace 2 are connected to the inner wall of the furnace body 1 through the straight tie rod 21 and the diagonal support rod 22, which enhances the strength and safety of the boiler.
[0033] Finally, the flue gas treated by the condenser 10 is discharged into the atmosphere through the chimney 101. The entire working process realizes efficient, energy-saving, environmentally friendly and safe steam supply.
[0034] Finally, it should be noted that the electronic components of the burner 5, superheater 9, etc. in this embodiment are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components are connected by wires respectively, and the specific connection means should refer to the working sequence between the electrical components in the above-mentioned working principle to complete the electrical connection, which are all well-known technologies in the art.
[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A steam boiler with a superheater, comprising a furnace body (1), characterized in that: A corrugated furnace liner (2) is arranged inside the furnace body (1), a burner (5) is installed at one end of the furnace body (1), a corrugated furnace liner (2) is installed inside the furnace body (1), one end of the corrugated furnace liner (2) is connected to a reburning chamber (3), the upper part of the reburning chamber (3) is connected to a threaded smoke pipe (4), one end of the threaded smoke pipe (4) is connected to a front smoke box (7), a superheater (9) and a condenser (10) are installed on the top of the furnace body (1), and one side of the superheater (9) is connected to the front smoke box (7) via a connecting flue (8).
2. The steam boiler with superheater according to claim 1, characterized in that: One end of the bottom of the furnace body (1) is connected to a sewage pipe (11), one end of the furnace body (1) is installed with an explosion-proof door (12), and the top of the furnace body (1) is installed with a safety valve (13) and a manhole (14).
3. The steam boiler with superheater according to claim 1, characterized in that: A water level gauge (17), a pressure gauge (18) and a platform ladder (19) are installed on the outside of the furnace body (1), and a base (6) is installed on the bottom of the furnace body (1).
4. The steam boiler with superheater according to claim 1, characterized in that: A water supply pump (110) is arranged outside the furnace body (1), and the water supply pump (110) is connected to the furnace body (1) and the condenser (10) through a water supply pipe (111).
5. The steam boiler with superheater according to claim 1, characterized in that: The end of the corrugated furnace liner (2) is connected to the inner wall of the furnace body (1) via a straight pull rod (21), and the upper part of the corrugated furnace liner (2) is connected to the inner wall of the furnace body (1) via an inclined support rod (22).
6. The steam boiler with superheater according to claim 1, characterized in that: The top of the condenser (10) is connected to the air inlet of the burner (5) through a circulation pipeline (15).
7. The steam boiler with superheater according to claim 1, characterized in that: A steam outlet (91) is installed at the top of the superheater (9), and the top of the superheater (9) is connected to the top of the furnace body (1) via a steam pipeline (16). A superheating pipe is arranged inside the superheater (9), and one end of the superheating pipe is connected to the steam pipeline (16), and the other end is connected to the steam outlet (91).
8. The steam boiler with superheater according to claim 1, characterized in that: The outer side of the condenser (10) is connected to a chimney (101).