CN-224215306-U - Full-premix combustion water-fire tube steam boiler

CN224215306UCN 224215306 UCN224215306 UCN 224215306UCN-224215306-U

Abstract

The utility model relates to the technical field of boilers, in particular to a full premix combustion water-fire tube steam boiler which comprises a boiler body, wherein a full premix burner is arranged outside one side of the boiler body, an upper boiler barrel is arranged on the upper part of the boiler body, a lower boiler barrel is arranged on the lower part of the boiler body, a hearth is arranged in the boiler body close to the full premix burner, an upper smoke collecting chamber is arranged at the top of the upper boiler barrel, a lower smoke collecting chamber is arranged at the bottom of the lower boiler barrel, a plurality of heat exchange sleeves are vertically arranged in the boiler body, each heat exchange sleeve comprises an inner tube and an outer tube, the inner tube is positioned in the outer tube, and one side of the lower smoke collecting chamber is communicated with the inside of the boiler body. In the full-premix combustion water-fire tube steam boiler, a full-premix combustion technology is adopted, fuel and air are fully mixed according to a certain proportion before combustion, so that uniform combustible mixed gas is formed, combustion is more complete, and combustion efficiency is improved. The full premix burner is reasonable in design, is suspended in a limited space behind a combustion plane, is suitable for smaller furnace space, and ensures the stability and uniformity of combustion.

Inventors

Feng Jiaju
YANG YUZHEN
Feng Ruoyan
TIAN ZHIJIAN
ZHENG XUEYU
LI PENGZHI
LIU JUNJIE
CHENG HEKANG
LIANG KUNLONG
YANG DONGHAI

Assignees

河南省四通锅炉有限公司

Dates

Publication Date: 20260508
Application Date: 20250418

Claims (8)

1. A full premix combustion water-fire tube steam boiler comprises a boiler body (1) and is characterized in that a full premix combustor (4) is arranged on the outer portion of one side of the boiler body (1), an upper boiler tube (2) is arranged on the upper portion of the boiler body (1), a lower boiler tube (3) is arranged on the lower portion of the boiler body (1), a hearth (5) is arranged in the boiler body (1) and close to the full premix combustor (4), an upper smoke collecting chamber (6) is arranged on the top of the upper boiler tube (2), a lower smoke collecting chamber (7) is arranged on the bottom of the lower boiler tube (3), a plurality of heat exchange sleeves (8) are vertically arranged in the boiler body (1), each heat exchange sleeve (8) comprises an inner tube (81) and an outer tube (82), the inner tube (81) is located in the outer tube (82), and one side of the lower smoke collecting chamber (7) is communicated with the inner portion of the boiler body (1).
2. The full premix combustion water-fire tube steam boiler as claimed in claim 1, wherein a steam outlet (21) is arranged at the top of the upper boiler barrel (2).
3. The full premix combustion water and fire tube steam boiler as claimed in claim 1, wherein a smoke outlet (61) is arranged at the top of the upper smoke collecting chamber (6).
4. The full premix combustion water and fire tube steam boiler according to claim 1, wherein one side of the lower boiler barrel (3) is connected with a water supply pipe (31), and a water supply pump (32) is arranged on the water supply pipe (31).
5. The full premix combustion water and fire tube steam boiler according to claim 1, wherein the upper end of the outer tube (82) is communicated with the upper furnace cylinder (2), and the lower end of the outer tube (82) is communicated with the lower furnace cylinder (3).
6. The full premix combustion water and fire tube steam boiler according to claim 5, wherein the upper end of the inner tube (81) penetrates through the upper furnace tube (2) and is communicated with the upper smoke collecting chamber (6), and the lower end of the inner tube (81) penetrates through the lower furnace tube (3) and is communicated with the lower smoke collecting chamber (7).
7. The full premix combustion water and fire tube steam boiler according to claim 1, wherein heat exchange channels are formed between adjacent heat exchange sleeves (8).
8. The full premix combustion water-fire tube steam boiler of claim 1, wherein the heat exchange sleeves (8) are two groups, namely a cooling sleeve and a flame stabilizing sleeve, the cooling sleeve is close to the hearth, and the flame stabilizing sleeve is far away from the hearth.

Description

Full-premix combustion water-fire tube steam boiler Technical Field The utility model relates to the technical field of boilers, in particular to a full-premix combustion water-fire tube steam boiler. Background In the technical field of boilers, along with continuous promotion of town and industrialization, energy demands are continuously increased, and energy consumption of residents is continuously increased. Meanwhile, environmental protection consciousness is increasingly enhanced, and higher requirements are put on energy efficiency and environmental protection performance of boiler equipment. The traditional boiler has the problems of insufficient combustion, low thermal efficiency, higher pollutant emission and the like in the combustion process, so that energy sources are wasted, and environmental pollution is aggravated. To address these challenges, full premix combustion technology is increasingly being used in the boiler field. The full premix combustion technology is an advanced combustion mode and is characterized in that fuel and air are fully mixed according to a certain proportion before combustion to form uniform combustible mixed gas, and then the uniform combustible mixed gas is combusted in a full premix combustor. The combustion mode can improve combustion efficiency and reduce pollutant generated by incomplete combustion, especially emission of nitrogen oxides (NOx). However, the existing water-fire tube steam boiler still has some defects in structural design and thermal efficiency. For example, some boilers have low heat exchange efficiency, resulting in energy waste, and meanwhile, the NOx emissions generated in the combustion process of part of the boilers are still high, which does not meet the increasingly strict environmental standards. Disclosure of utility model The utility model aims to provide a full premix combustion water-fire tube steam boiler, which aims to solve the problems that the water-fire tube steam boiler provided in the background art still has some defects in structural design and thermal efficiency. In order to achieve the above purpose, the utility model provides a full premix combustion water-fire tube steam boiler, which comprises a boiler body, wherein a full premix burner is arranged outside one side of the boiler body, an upper boiler barrel is arranged on the upper part of the boiler body, a lower boiler barrel is arranged on the lower part of the boiler body, a hearth is arranged in the boiler body close to the full premix burner, an upper smoke collecting chamber is arranged at the top of the upper boiler barrel, a lower smoke collecting chamber is arranged at the bottom of the lower boiler barrel, a plurality of heat exchange sleeves are vertically arranged in the boiler body, each heat exchange sleeve comprises an inner pipe and an outer pipe, the inner pipe is positioned in the outer pipe, and one side of the lower smoke collecting chamber is communicated with the inside of the boiler body. Preferably, the top of the upper furnace vessel is provided with a steam outlet. Preferably, a smoke outlet is formed in the top of the upper smoke collecting chamber. Preferably, a water supply pipe is connected to one side of the lower furnace barrel, and a water supply pump is mounted on the water supply pipe. Preferably, the upper end of the outer tube is communicated with the upper furnace cylinder, and the lower end of the outer tube is communicated with the lower furnace cylinder. Preferably, the upper end of the inner tube penetrates through the upper furnace barrel and is communicated with the upper smoke collecting chamber, and the lower end of the inner tube penetrates through the lower furnace barrel and is communicated with the lower smoke collecting chamber. Preferably, heat exchange channels are formed between adjacent heat exchange sleeves. Preferably, the heat exchange sleeves are two groups, namely a cooling sleeve and a flame stabilizing sleeve, the cooling sleeve is close to the hearth, and the flame stabilizing sleeve is far away from the hearth. Compared with the prior art, the utility model has the beneficial effects that: In the full-premix combustion water-fire tube steam boiler, a full-premix combustion technology is adopted, fuel and air are fully mixed according to a certain proportion before combustion, so that uniform combustible mixed gas is formed, combustion is more complete, and combustion efficiency is improved. The full premix burner is reasonable in design, short in flame length, and suspended in a limited space behind a combustion plane, is suitable for smaller furnace space, and ensures the stability and uniformity of combustion. A plurality of heat exchange sleeves are vertically arranged in the furnace body and comprise an inner pipe and an outer pipe, so that an efficient heat exchange structure is formed. The inner pipe is used as a flue gas waste heat channel, a water flow channel is formed between the outer pipe and