CN220017706U - A straight-through water-cooled low-nitrogen combustion fire tube hot water boiler - Google Patents

Abstract

The utility model discloses a straight-through water-cooling low-nitrogen combustion fire tube hot water boiler, which comprises a boiler body, wherein the boiler body comprises a boiler liner and a water storage tank, the water storage tank is arranged above the boiler liner, a combustion mechanism is arranged in the boiler liner, the combustion mechanism heats up water in the water storage tank by combustion, a water outlet pipe and a water inlet pipe are arranged above the boiler body, the heated water is discharged from the water outlet pipe into a user and then enters the water storage tank from the water inlet pipe, and the boiler body is provided with a water inlet pipe and a water outlet pipe which are communicated with the water inlet pipe through the water inlet pipeOne side is provided with a smoke exhaust pipe; the straight-through type water-cooling low-nitrogen combustion fire tube hot water boiler can enable hot water in the boiler to circulate inside and outside during use, meets indoor heating requirements of users, and can inhibit thermal NO during combustion _X The production of the boiler realizes low nitrogen environment protection, and in addition, the boiler has high thermal efficiency, small overall size and small occupied area, and is suitable for popularization and use.

Description

A straight-through water-cooled low-nitrogen combustion fire tube hot water boiler

Technical field

The utility model relates to the technical field of hot water boilers, in particular to a straight-through water-cooled low-nitrogen combustion fire tube hot water boiler.

Background technique

The boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy, electrical energy, etc. in the fuel, and the output of the boiler is steam, high-temperature water, etc. with a certain thermal energy. The boiler is divided into steam boiler and hot water boiler. , the output of steam boilers is high-temperature steam, while the output of hot water boilers is hot water. Both the steam and hot water produced will eventually be discharged for industrial or household use.

The Chinese utility model patent with publication number CN218764019U discloses a straight-through hydrogen-fired hot water boiler, which includes a furnace body, a hydrogen-fired burner, a furnace, a threaded smoke pipe group and a chimney. The furnace body is provided with a furnace and a threaded smoke pipe. group, the hydrogen-burning burner is arranged at the front end of the furnace body, the furnace and the hydrogen-burning burner are connected through the burner connecting barrel section, the rear tube plate of the furnace is connected to the threaded smoke pipe group, and the rear end of the furnace body passes through the smoke outlet The chimney is connected, and the hydrogen-burning burner, furnace, threaded smoke pipe group and smoke outlet are on the same horizontal straight line; the technical problem of the safety hazard of hydrogen accumulation and the easy corrosion of the furnace is solved.

However, the above-mentioned hot water boiler cannot achieve internal and external circulation of hot water during use, and the boiler cannot suppress the generation of thermal _NO Temperature cannot be absorbed twice, resulting in low thermal efficiency and inconvenience.

Contents of the invention

The purpose of this utility model is to solve the above problems and provide a furnace that can circulate hot water inside and outside the furnace to meet the user's indoor heating needs, and can suppress the generation of thermal _NO High, overall size, small footprint, straight-through water-cooled low-nitrogen combustion fire tube hot water boiler.

In order to achieve the above purpose, the technical solution of the present invention is: a straight-through water-cooled low-nitrogen combustion fire tube hot water boiler, including a boiler body, the boiler body includes a furnace and a water storage tank, and the water storage tank is located in the furnace Above the furnace, there is a combustion mechanism inside the furnace. The combustion mechanism heats up the water in the water storage tank. There is an outlet pipe and a water inlet pipe above the boiler body. The heated water is discharged from the outlet pipe into the boiler. The user then enters the water storage tank through the water inlet pipe, and a smoke exhaust pipe is provided on one side of the boiler body.

Preferably, the combustion mechanism includes a burner, a combustion tube, a front header and a rear header. The burner is located outside the boiler body. One end of the combustion tube is connected to the burner, and the other end passes through the front header. Extending into the furnace and fixedly connected to the rear header, the combustion tube is provided with exhaust holes along its length.

Preferably, a plurality of fire exhaust pipes are evenly arranged around the combustion tube, the plurality of fire exhaust pipes are arranged along the outer circumference of the combustion tube, and the exhaust holes are provided between every two adjacent fire exhaust pipes. There is cooling water in the fire exhaust pipe, one end of the fire exhaust pipe is connected to the front header, and the other end is connected to the rear header. The cooling water circulates in the front header, the fire exhaust pipe and the rear header.

Preferably, the front header is provided with a partition, and the partition divides the front header into a water inlet chamber and a drainage chamber. The water inlet chamber is provided with a water inlet, and the drainage chamber is provided with a drainage outlet.

Preferably, the burner includes a fan, a gas inlet channel, an air inlet channel and an igniter. Air and gas enter the burner and are mixed by the fan, and the mixed gas is ignited by the igniter.

Preferably, a smoke collection box is also provided on one side of the water storage tank, and a first return pipe and a second return pipe are provided in the water storage tank. One end of the first return pipe is connected to the furnace, and the other end is connected to the furnace. The smoke collecting box is connected, one end of the second return pipe is connected with the smoke collecting box, and the other end extends toward the smoke exhaust pipe. The smoke generated by the combustion in the furnace passes through the first return pipe, the smoke collecting box and the second The return pipe is discharged from the exhaust pipe.

Preferably, the water outlet pipe and the water inlet pipe are respectively connected to a circulating water pump, and the inlet and outlet water are forced to circulate through the circulating water pump.

The utility model discloses a straight-through water-cooled low-nitrogen combustion fire tube hot water boiler, which includes a boiler body. The boiler body includes a furnace and a water storage tank. The water storage tank is located above the furnace. Inside the furnace There is a combustion mechanism, and the combustion mechanism heats up the water in the water storage tank. There is a water outlet pipe and a water inlet pipe above the boiler body. The heated water is discharged from the water outlet pipe into the user and then enters the storage tank from the water inlet pipe. A water tank is provided with a smoke exhaust pipe on one side of the boiler body; compared with the existing technology, this straight-through water-cooled low-nitrogen combustion fire tube hot water boiler can circulate hot water inside and outside the furnace when in use, satisfying users Indoor heating needs, and can suppress the generation of thermal _NO

Description of the drawings

Figure 1 is a schematic diagram of the internal structure of a straight-through water-cooled low-nitrogen combustion fire tube hot water boiler of the present invention.

Figure 2 is a schematic structural diagram of the burner and air supply assembly in a straight-through water-cooled low-nitrogen combustion fire tube hot water boiler of the present invention.

Figure 3 is a schematic structural diagram of the burner and air supply assembly in a straight-through water-cooled low-nitrogen combustion fire tube hot water boiler of the present invention.

Figure 4 is a schematic cross-sectional view taken at A-A in Figure 2.

Figure 5 is a schematic cross-sectional view taken at B-B in Figure 2.

Figure 6 is a schematic plan view of the combustion tube in a straight-through water-cooled low-nitrogen combustion fire tube hot water boiler of the present invention.

In the picture: 1. Boiler body; 11. Furnace tank; 12. Water storage tank; 121. First return pipe; 122. Second return pipe; 13. Smoke collecting box; 14. Water outlet pipe; 15. Water inlet pipe; 16. Smoke exhaust pipe; 2. Burner; 21. Fan; 22. Gas inlet channel; 23. Air inlet channel; 24. Igniter; 3. Front header; 31. Partition; 32. Water inlet; 33. Drainage outlet; 4. Rear header; 5. Combustion pipe; 51. Exhaust hole; 6. Fire exhaust pipe.

Detailed ways

The utility model will now be described in further detail with reference to the accompanying drawings. The accompanying drawing is a simplified schematic diagram, which only illustrates the basic structure of the present utility model in a schematic manner, so it only shows the components related to the present utility model.

Please refer to Figures 1-6. A straight-through water-cooled low-nitrogen combustion fire tube hot water boiler includes a boiler body 1. The boiler body 1 includes a furnace 11 and a water storage tank 12. The water storage tank 12 is located in the furnace 11. Above the boiler body 1, there is a combustion mechanism inside. The combustion mechanism heats up the water in the water storage tank 12. There is a water outlet pipe 14 and a water inlet pipe 15 above the boiler body 1. The heated water It is discharged from the water outlet pipe 14 into the user and then enters the water storage tank 12 from the water inlet pipe 15. The water outlet pipe 14 and the water inlet pipe 15 are respectively connected to the circulating water pump. The inlet and outlet water is forced to circulate through the circulating water pump. That is to say, the furnace liner passes through the combustion mechanism. The combustion heats the water in the water storage tank 12. After heating, the hot water is discharged from the water outlet pipe through the circulating water pump and enters the household for use. After use, the temperature decreases and then enters the water storage tank 12 from the water inlet pipe 15 through the circulating water pump again. This cycle ensures For indoor heating of residents, a smoke exhaust pipe 16 is provided on one side of the boiler body 1. The smoke generated by the combustion mechanism is finally discharged from the boiler body at the smoke exhaust pipe 16.

In the solution of the present utility model, the combustion mechanism includes a burner 2, a combustion tube 5, a front header 3 and a rear header 4. The burner 2 is located outside the boiler body 1, and one end of the combustion tube 5 is connected to The burner 2 is connected, and the other end extends through the front header 3 into the furnace 11 and is fixedly connected to the rear header 4. The combustion tube 5 is provided with an exhaust hole 51 along its length direction; wherein the burner 2 It includes a fan 21, a gas inlet channel 22, an air inlet channel 23 and an igniter 24. Air and gas enter the burner and are mixed by the fan 21, and the mixed gas is ignited by the igniter 24. That is to say, the mixed gas pipe enters the furnace 11 through the exhaust hole 51. When the igniter ignites the gas, the flame in the furnace heats the water in the upper water storage tank.

Furthermore, a plurality of fire exhaust pipes 6 are evenly arranged around the combustion tube 5. The plurality of fire exhaust pipes 6 are arranged along the outer circumference of the combustion tube 5. The exhaust holes 51 are provided on every two adjacent ones. Between the fire exhaust pipes 6, the fire exhaust pipes 6 and the exhaust holes 51 are set up one by one. Cooling water is provided in the fire exhaust pipe 6. One end of the fire exhaust pipe 6 is connected to the front header 3, and the other end is connected to the front header 3. It is connected with the rear header 4, and the cooling water circulates in the front header 3, the fire exhaust pipe 6 and the rear header 4.

Specifically, a partition 31 is provided inside the front header 3. The partition 31 separates the front header 3 into a water inlet chamber and a drainage chamber. The water inlet chamber is provided with a water inlet 32, and the drainage chamber is provided with a drain port 33. Cooling Water enters the water inlet cavity through the water inlet 32, and the cooling water in the water inlet cavity enters the rear header 4 through the fire drain pipe 6. The cooling water in the rear header 4 then enters the front header 3 through the fire drain pipe 6, and finally passes through The drain port 33 is discharged to complete the circulation of cooling water.

When in use, air and gas enter the burner 2, and are uniformly mixed by the fan and ignited by the igniter. At this time, the gas is ignited in the furnace to heat the water in the water storage tank 12. During the combustion process, due to the fire exhaust pipe 6 There is circulating cooling water inside, so it can ensure that the flame is evenly distributed and does not produce local high temperatures, and the flame temperature is kept below 950°C, which can effectively suppress the generation of thermal _NOx and achieve low-nitrogen environmental protection.

The traditional diffusion burner has a long flame and requires a large furnace space. However, the density of exhaust holes between the fire exhaust pipes is high and the thermal efficiency is high. Therefore, a larger furnace can be used to meet the usage requirements, further reducing the need for a larger furnace. Small overall boiler size, reducing floor space.

Furthermore, in order to facilitate the discharge of smoke generated during gas combustion, a smoke collection box 13 is provided on one side of the water storage tank 12, and a first return pipe 121 and a second return pipe are provided in the water storage tank 12. 122. One end of the first return pipe 121 is connected to the furnace 11 and the other end is connected to the smoke collecting box 13. One end of the second return pipe 122 is connected to the smoke collecting box 13 and the other end is in the direction of the smoke exhaust pipe 16. Extension; as the gas burns in the furnace, the internal temperature rises and the flue gas concentration gradually increases. The smoke will flow to the smoke collecting box along the first return pipe 121. Similarly, the smoke in the smoke collecting box 13 will flow to the smoke exhaust pipe along the second return pipe 122. Finally, the smoke generated by the combustion in the furnace 11 will pass through The first return pipe 121, the smoke collecting box 13 and the second return pipe 122 are discharged from the smoke exhaust pipe 16; during the smoke exhaust process, the first return pipe 121 and the second return pipe 122 always penetrate the water storage tank 12 and contact the water inside. , at this time, the temperature of the return pipe can further heat the water and improve the heating efficiency.

Obviously, the above-mentioned embodiments are only examples for clear explanation and are not intended to limit the implementation. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. An exhaustive list of all implementations is neither necessary nor possible. The obvious changes or modifications derived therefrom are still within the protection scope of the invention.

Claims (7)

1. A straight-through water-cooled low-nitrogen combustion fire tube hot water boiler, including a boiler body, characterized in that the boiler body includes a furnace and a water storage tank, the water storage tank is located above the furnace, and the furnace There is a combustion mechanism inside, and the combustion mechanism heats up the water in the water storage tank. There is an outlet pipe and a water inlet pipe above the boiler body. The heated water is discharged from the outlet pipe and enters the user through the water inlet pipe. A water storage tank is provided with a smoke exhaust pipe on one side of the boiler body. 2. The straight-through water-cooled low-nitrogen combustion fire tube hot water boiler according to claim 1, characterized in that the combustion mechanism includes a burner, a combustion tube, a front header and a rear header, and the burner is located at Outside the boiler body, one end of the combustion tube is connected to the burner, and the other end extends through the front header into the furnace and is fixedly connected to the rear header. The combustion tube is provided with an exhaust hole along its length. 3. The straight-through water-cooled low-nitrogen combustion fire tube hot water boiler according to claim 2, characterized in that a plurality of fire exhaust pipes are evenly arranged around the combustion tube, and the plurality of fire exhaust pipes burn along the The outer circumference of the tubes is arranged, and the exhaust holes are arranged between each two adjacent fire exhaust pipes. Cooling water is provided in the fire exhaust pipes. One end of the fire exhaust pipes is connected to the front header, and the other end is connected to the rear header. The headers are connected, and the cooling water circulates in the front header, fire exhaust pipe and rear header. 4. The straight-through water-cooled low-nitrogen combustion fire tube hot water boiler according to claim 3, characterized in that a partition is provided in the front header, and the partition divides the front header into a water inlet chamber and a water inlet chamber. Drainage cavity, the water inlet cavity is provided with a water inlet, and the drainage cavity is provided with a drainage outlet. 5. The straight-through water-cooled low-nitrogen combustion fire tube hot water boiler according to claim 2 or 3, characterized in that the burner includes a fan, a gas inlet channel, an air inlet channel and an igniter, and the air and gas It enters the burner and is mixed by the fan, and the mixed gas is ignited by the igniter. 6. The straight-through water-cooled low-nitrogen combustion fire tube hot water boiler according to claim 1, characterized in that a smoke collection box is also provided on one side of the water storage tank, and a first return pipe is provided in the water storage tank. and a second return pipe. One end of the first return pipe is connected to the furnace and the other end is connected to the smoke collecting box. One end of the second return pipe is connected to the smoke collecting box and the other end extends toward the smoke exhaust pipe. The smoke generated by combustion in the furnace is discharged from the exhaust pipe through the first return pipe, the smoke collection box and the second return pipe. 7. The straight-through water-cooled low-nitrogen combustion fire tube hot water boiler according to claim 1, characterized in that the water outlet pipe and the water inlet pipe are respectively connected to a circulating water pump, and the inlet and outlet water are forced to circulate through the circulating water pump.