Waste heat steam boiler suitable for garbage incinerator

Abstract

The utility model relates to the technical field of boilers, in particular to a waste heat steam boiler suitable for a garbage incinerator, which comprises a boiler body, a boiler barrel is mounted at the top of the boiler body, a smoke inlet is arranged at one end of the boiler body, a smoke outlet is arranged at the other end of the boiler body, and a plurality of convection banks are vertically arranged inside the boiler body. Headers are installed at the upper end and the lower end of the convection bank, the upper header is connected with the boiler barrel through a pipeline, a plurality of soot blowers are installed on the upper portion of the convection bank and fixed through transverse rods, and the transverse rods are installed on the inner wall of the upper portion of the boiler body. According to the waste heat steam boiler suitable for the garbage incinerator, remarkable technical innovation is carried out aiming at the problem that particle impurities are deposited when a traditional boiler is used for treating garbage incineration flue gas. The soot blower is ingeniously installed on the upper portion of the convection bank, the design of the S-shaped smoke channel is combined, the problem of a deposition layer on the convection bank is effectively solved, the efficient heat exchange performance of the convection bank is kept, and the operation stability and safety of the boiler are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, and specifically to a waste heat steam boiler applicable to a waste incinerator. Background Art

[0002] During the waste incineration process, the generated high-temperature flue gas not only carries a large amount of sensible heat but also often contains various particulate impurities. During the flow of the flue gas, these impurities are likely to adhere to the convection tubes of the boiler, and a thick deposition layer will be formed after long-term accumulation, which not only affects the heat transfer efficiency of the convection tubes but also may lead to unstable operation of the boiler and even pose potential safety hazards.

[0003] When traditional waste heat steam boilers are designed, they often neglect the effective treatment and cleaning of these particulate impurities. The deposition layer on the convection tubes is not only difficult to remove, but also a large amount of dust and pollutants may be generated during the cleaning process, causing secondary pollution to the environment. At the same time, the presence of the deposition layer also increases the maintenance difficulty and cost of the boiler. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a waste heat steam boiler applicable to a waste incinerator to solve the problem that traditional waste heat steam boilers often neglect the effective treatment and cleaning of these particulate impurities as mentioned in the above background art.

[0005] To achieve the above purpose, the utility model provides a waste heat steam boiler applicable to a waste incinerator, including a furnace body. A drum is installed at the top of the furnace body. A flue gas inlet is provided at one end of the furnace body, and a flue gas outlet is provided at the other end of the furnace body. A number of convection tubes are vertically arranged inside the furnace body. Headers are installed at the upper and lower ends of the convection tubes. The upper header is connected to the drum through a pipeline. A number of soot blowers are installed on the upper part of the convection tubes. The soot blowers are fixed by a cross bar, and the cross bar is installed on the inner wall of the upper part of the furnace body. The space inside the furnace body outside the convection tubes forms an S-shaped flue gas passage through a baffle plate.

[0006] Preferably, a steam-water separator is installed at the top of the drum.

[0007] Preferably, a safety valve and a pressure gauge are installed at the top of the drum.

[0008] Preferably, a base is installed at the bottom of the furnace body.

[0009] Preferably, the connecting pipelines between the header and the drum are multiple and arranged in parallel.

[0010] Preferably, a slag collection bin is provided at the bottom of the furnace body, and a slag discharge port is provided on one side of the slag collection bin.

[0011] Preferably, a plurality of blow-off valves are connected to the outer side of the bottom of the furnace body.

[0012] Preferably, a water level gauge is installed on the outer wall of one side of the drum.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the waste heat steam boiler applicable to a waste incinerator, significant technological innovations have been made to address the problem of particulate impurity deposition faced by traditional boilers when dealing with waste incineration flue gas. By ingeniously installing soot blowers on the upper part of the convective tube bundle and combining with the design of the S-shaped flue gas channel, the deposition layer on the convective tube bundle has been effectively solved, not only maintaining its high heat transfer performance, but also greatly improving the operation stability and safety of the boiler.

[0015] In addition, this boiler has also made the maintenance and cleaning work of the boiler more convenient by optimizing the structural design, such as adding a slag collecting bin and blow-off valves, effectively reducing the maintenance cost and reducing the risk of environmental pollution. At the same time, devices such as steam-water separators, safety valves, pressure gauges and water level gauges equipped on the drum further improve the operation monitoring and safety performance of the boiler.

[0016] In summary, the waste heat steam boiler of the present utility model has shown excellent technical effects in the field of waste incineration. It not only improves the waste heat recovery efficiency, but also effectively solves the problem of particulate impurity deposition, providing a strong guarantee for the long-term stable operation of the boiler, and having significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view structural schematic diagram of the present utility model;

[0018] Figure 2 is a side view structural schematic diagram of the present utility model;

[0019] Figure 3 is a top view structural schematic diagram of the present utility model;

[0020] Figure 4 is an internal structural schematic diagram of the furnace body in the present utility model;

[0021] The meanings of each label in the figure are as follows:

[0022] 1. Furnace body; 11. Flue gas inlet; 12. Flue gas outlet; 13. Base; 14. Water wall; 15. Header; 16. Slag collecting bin; 17. Slag discharge port; 18. Blow-off valve; 2. Drum; 21. Water level gauge; 22. Steam-water separator; 23. Safety valve; 3. Convective tube bundle; 31. Baffle; 4. Cross bar; 41. Soot blower. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] The present invention provides a waste heat steam boiler applicable to a waste incinerator, as Figures 1-4 shown, which includes a furnace body 1. A steam drum 2 is installed at the top of the furnace body 1. A flue gas inlet 11 is provided at one end of the furnace body 1, and a flue gas outlet 12 is provided at the other end of the furnace body 1. A plurality of convection tube bundles 3 are vertically arranged inside the furnace body 1. Header tanks 15 are installed at the upper and lower ends of the convection tube bundles 3. The upper header tank 15 is connected to the steam drum 2 through a pipeline. A plurality of soot blowers 41 are installed on the upper part of the convection tube bundles 3. The soot blowers 41 are fixed by a cross bar 4, and the cross bar 4 is installed on the inner wall of the upper part of the furnace body 1. The space inside the furnace body 1 outside the convection tube bundles 3 forms an S-shaped flue gas passage through a baffle plate 31. A water-cooled wall 14 is installed on the inner wall of the furnace body 1, and the upper and lower ends of the water-cooled wall 14 are connected to the header tank 15, which is convenient for reducing the temperature of the inner wall of the furnace body 1.

[0025] In this embodiment, a steam-water separator 22 is installed on the top of the steam drum 2, which is convenient for steam-water separation, so as to realize the outward discharge of steam.

[0026] Specifically, a safety valve 23 and a pressure gauge are installed on the top of the steam drum 2 for ensuring the pressure monitoring of the steam drum 2.

[0027] Furthermore, a base 13 is installed at the bottom of the furnace body 1, which is convenient for the support and fixation of the furnace body 1.

[0028] Furthermore, the connecting pipelines between the header tank 15 and the steam drum 2 are multiple and arranged in parallel, so that the water in the steam drum 2 can uniformly enter the header tank 15.

[0029] Furthermore, a slag collection bin 16 is provided at the bottom of the furnace body 1, and a slag discharge port 17 is provided on one side of the slag collection bin 16, which is convenient for collecting the blown dust and impurities and performing regular cleaning.

[0030] Furthermore, a plurality of blowdown valves 18 are connected to the outer side of the bottom of the furnace body 1, which is convenient for blowdown operation.

[0031] Furthermore, a water level gauge 21 is installed on the outer wall of one side of the steam drum 2 for monitoring the water level in the steam drum 2.

[0032] When the waste heat steam boiler applicable to a waste incinerator of the present utility model is in use, first, when the high-temperature flue gas generated by the waste incinerator enters the furnace body 1 through the flue gas inlet 11, this flue gas carries a large amount of sensible heat. Inside the furnace body 1, the flue gas is guided to flow through a number of vertically arranged convection tube bundles 3. The design of the convection tube bundles 3 enables the flue gas to conduct sufficient heat exchange with them, thereby converting the sensible heat in the flue gas into the heat energy of the water in the convection tube bundles 3.

[0033] As the heat exchange progresses, the water in the convection tube bundles 3 is gradually heated and converted into steam. These steams then rise through the connecting pipeline between the upper header 15 and the drum 2 and enter the drum 2. Inside the drum 2, the steam further undergoes steam-water separation to ensure the quality of the discharged steam.

[0034] During the operation of the boiler, particulate impurities from the flue gas may adhere to the convection tube bundles 3, forming a deposition layer. To solve this problem, the present utility model installs a number of soot blowers 41 on the upper part of the convection tube bundles 3. These soot blowers 41 are fixed to the upper inner wall of the furnace body 1 through a cross bar 4 and are periodically activated to remove the deposition layer on the convection tube bundles 3. The dust and impurities blown off will fall into the slag collection bin 16 at the bottom of the furnace body 1 and are periodically cleaned through the slag discharge port 17.

[0035] In addition, the space inside the furnace body 1 outside the convection tube bundles 3 forms an S-shaped flue gas channel through the smoke deflecting plate 31. This design extends the flow path of the flue gas inside the furnace body 1, increases the contact time between the flue gas and the convection tube bundles 3, and thus improves the waste heat recovery efficiency.

[0036] During the entire operation of the boiler, the safety valve 23 and the pressure gauge on the top of the drum 2 are used to monitor and control the pressure inside the drum 2 to ensure the safe operation of the boiler. At the same time, the water level gauge 21 is used to monitor the water level inside the drum 2 to ensure the normal operation of the boiler. When sewage discharge is required, it can be operated through the sewage valve 18 connected to the outside of the bottom of the furnace body 1.

[0037] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A waste heat steam boiler suitable for a waste incinerator, comprising a furnace body (1), characterized in that: A boiler drum (2) is installed on the top of the furnace body (1), a flue gas inlet (11) is provided at one end of the furnace body (1), and a flue gas outlet (12) is provided at the other end of the furnace body (1). A plurality of convection tube bundles (3) are vertically arranged inside the furnace body (1), and headers (15) are installed at the upper and lower ends of the convection tube bundles (3). The upper header (15) is connected to the boiler drum (2) through a pipeline. A plurality of soot blowers (41) are installed on the upper part of the convection tube bundle (3), and the soot blowers (41) are fixed by a cross bar (4). The cross bar (4) is installed on the upper inner wall of the furnace body (1). The space outside the convection tube bundle (3) in the furnace body (1) forms an S-shaped flue gas channel through a smoke folding plate (31).

2. The waste heat steam boiler suitable for a garbage incinerator according to claim 1, characterized in that: A steam-water separator (22) is installed on the top of the boiler drum (2).

3. The waste heat steam boiler suitable for a garbage incinerator according to claim 1, characterized in that: A safety valve (23) and a pressure gauge are installed on the top of the boiler drum (2).

4. The waste heat steam boiler suitable for a garbage incinerator according to claim 1, characterized in that: A base (13) is installed at the bottom of the furnace body (1).

5. The waste heat steam boiler suitable for a garbage incinerator according to claim 1, characterized in that: The connecting pipes between the header (15) and the boiler drum (2) are multiple pipes arranged in parallel.

6. The waste heat steam boiler suitable for a garbage incinerator according to claim 1, characterized in that: A slag collecting bin (16) is provided at the bottom of the furnace body (1), and a slag discharge port (17) is provided on one side of the slag collecting bin (16).

7. The waste heat steam boiler suitable for a garbage incinerator according to claim 1, characterized in that: A plurality of sewage valves (18) are connected to the outer side of the bottom of the furnace body (1).

8. The waste heat steam boiler suitable for a garbage incinerator according to claim 1, characterized in that: A water level gauge (21) is installed on one side outer wall of the boiler drum (2).

Images