CN-122015527-A - Hot water boiler utilizing high-temperature waste gas waste heat

Abstract

The invention discloses a hot water boiler utilizing the waste heat of high-temperature waste gas, which solves the problems that the existing waste heat recovery equipment cannot be adapted to the high-temperature tar-containing waste gas, and has low heat exchange efficiency, inconvenient cleaning and maintenance and poor operation stability. The boiler comprises a boiler frame, a water storage frame and a plurality of hot air conveying pipes, wherein the left side and the right side above the boiler frame are respectively provided with an air inlet pipe and an air outlet pipe, the water storage frame is arranged inside the boiler frame, the plurality of hot air conveying pipes are transversely and densely arranged in the water storage frame and are completely immersed in circulating water, two ends of the hot air conveying pipes are respectively communicated with the air inlet pipe and the air outlet pipe, and the top of the water storage frame is provided with a circulating water inlet and outlet. The invention adopts a single-stage direct dividing wall type immersed heat exchange structure, has high waste heat recovery efficiency, can stably adapt to high-flow high-temperature waste gas, is matched with an online cleaning structure and a rigid supporting structure, has reliable operation and convenient maintenance, and is suitable for various industrial high-temperature waste gas waste heat recovery scenes.

Inventors

• YAN CHANGZHI
• YANG GUOWEI
• QIN JIAWANG
• WEN DAMING
• PAN QIANG
• HUANG YUANTAN
• XU SHIJIAN
• Sun Xiangma
• XIE YOUMING
• LI WEIMING
• KONG DEMING
• Xiong Xueyuan
• LIU LINGFEI
• YAN QIHONG

Assignees

• 广东创智智能装备有限公司

Dates

Publication Date

20260512

Application Date

20260403

Claims (10)

1. 1. A hot water boiler utilizing waste heat of high-temperature waste gas is characterized by comprising a boiler frame (1), a water storage frame (2) arranged in the boiler frame (1), a plurality of hot air conveying pipes arranged in the water storage frame (2), air inlet pipes (31) and air outlet pipes (32) respectively arranged on the left side and the right side above the boiler frame (1) and used for inputting the high-temperature waste gas and outputting cooled tail gas respectively, circulating water is filled in the water storage frame (2), the plurality of hot air conveying pipes are transversely densely arranged in the water storage frame (2) and are completely immersed in the circulating water, two ends of the hot air conveying pipes are respectively communicated with the air inlet pipes (31) and the air outlet pipes (32), and the boiler frame (1) is further provided with a circulating water inlet (41) and a circulating water outlet (42) which are communicated to the top of the water storage frame (2) and used for inputting low-temperature circulating water and outputting heated hot water respectively.
2. 2. The hot water boiler utilizing the waste heat of the high-temperature waste gas according to claim 1, wherein the boiler frame (1) is divided into an air inlet cavity (11), a heat exchange cavity (12) and an air outlet cavity (13) from left to right, the air inlet cavity (11) is respectively communicated with an air inlet pipe (31) and an air inlet end of a hot air conveying pipe, the water storage frame (2) is arranged in the heat exchange cavity (12), and the air outlet cavity (13) is respectively communicated with the air outlet end of the hot air conveying pipe and an air outlet pipe (32).
3. 3. The hot water boiler using the waste heat of the high-temperature exhaust gas according to claim 1, wherein a supporting frame for fixing the hot air conveying pipe is further arranged inside the water storage frame (2), and the supporting frame is composed of a plurality of round branches (51) longitudinally distributed inside the water storage frame (2).
4. 4. The hot water boiler using the residual heat of the high temperature exhaust gas according to claim 1, wherein the boiler frame (1) is further provided with iron plate reinforcing ribs (6).
5. 5. The hot water boiler using the waste heat of the high temperature exhaust gas according to claim 1, wherein the boiler frame (1) is further provided with a multifunctional drainage structure, the multifunctional drainage structure comprises three drainage ports arranged at the bottom of the boiler frame (1), the drainage ports at the left side and the right side are used for draining water or cleaning liquid, and the middle drainage port is used for draining water or cleaning liquid after the water storage frame (2) is cleaned independently.
6. 6. The hot water boiler utilizing the waste heat of the high-temperature waste gas according to claim 1 or 5, wherein a liquid medicine injection interface (71) is formed on the air inlet pipe (31) and is communicated with the boiler frame (1) for injecting liquid medicine during cleaning, and a water injection interface (72) is formed on the air outlet pipe (32) and is communicated with the boiler frame (1) for injecting clean water during cleaning.
7. 7. The hot water boiler using the residual heat of the high temperature exhaust gas according to claim 1 or 4, wherein the top of the boiler frame (1) is further provided with an automatic exhaust valve (81) for exhausting the air in the circulating water inside the water storage frame (2).
8. 8. The hot water boiler utilizing the waste heat of the high temperature exhaust gas according to claim 1, wherein the top of the boiler frame (1) is further provided with a water supplementing interface (82) for supplementing the water storage frame (2) with circulating water.
9. 9. The hot water boiler using the residual heat of the high temperature exhaust gas according to claim 1, wherein the hot air delivery pipe is a 304 stainless steel pipe.
10. 10. The hot water boiler using the residual heat of the high temperature exhaust gas according to claim 1, wherein the bottom of the boiler frame (1) is also connected with a supporting underframe (83).

Description

Hot water boiler utilizing high-temperature waste gas waste heat Technical Field The invention relates to the technical field of industrial waste heat recycling equipment, in particular to a hot water boiler utilizing high-temperature waste gas waste heat. Background A large amount of high-temperature waste gas carrying waste heat can be generated in the industrial production process, if the waste heat is directly discharged, serious energy waste is caused, heat pollution is also formed, and the energy-saving and consumption-reducing industrial development requirements are not met. In the prior art, the Chinese patent with the publication number of CN204255130U discloses an oil pretreatment high-temperature waste gas waste heat utilization system, which designs a waste heat recovery structure taking a waste heat absorption tower as a core aiming at high-temperature waste gas which is discharged by an oil cooler of an oil pretreatment workshop, and mainly comprises a fan, an air heater, the oil cooler, a salon, the waste heat absorption tower, a spray pump and a shell-and-tube heat exchanger. The core waste heat recovery principle is that high-temperature waste gas enters a waste heat absorption tower after being dedusted by a saxophone, passes through a packing layer from bottom to top, forms countercurrent gas-liquid direct contact heat exchange with cold water sprayed by a main spray pipe in the packing layer, becomes hot water after absorbing the heat of the waste gas, and is sent into a shell-and-tube heat exchanger through a spray pump to indirectly exchange heat to release heat, and cooled cold water is sent into a spray pipe again for circulating spraying, so that the waste heat recovery of the high-temperature waste gas is realized. The system increases the gas-liquid contact area through the packing layer, improves the heat recovery rate of medium-low temperature waste gas, can synchronously remove peculiar smell and dust impurities in the waste gas, and has certain application value in the low-temperature dust-containing waste gas waste heat recovery scene of the oil pretreatment industry. The scheme adopts gas-liquid direct contact type spray heat exchange, is only suitable for medium-low temperature waste gas at about 85 ℃, and can lead to severe vaporization of spray water for high-temperature waste gas at 200 ℃ to cause severe fluctuation of pressure of a heat exchange cavity and extremely poor heat exchange stability, and meanwhile, potential safety hazards such as equipment cavitation, pipeline vibration and the like are easily caused, so that the use requirements of continuous and stable heat exchange of the high-temperature waste gas can not be met. In addition, the prior art adopts a two-stage heat exchange mode of waste gas-spray water-purified water, has more heat transfer links and large overall heat loss, can only realize small temperature drop of medium-low temperature waste gas, can not simultaneously realize the heat exchange target of large temperature difference, and has difficult waste heat recovery efficiency to meet the utilization requirement of high temperature waste gas. Meanwhile, the heat exchange cavity does not adopt an optimized structure matched with a heat exchange unit, the whole volume of the equipment is huge, the space utilization rate is low, and high-efficiency heat exchange cannot be realized in a compact structure. The scheme adopts countercurrent layout of waste gas from bottom to top and spray water from top to bottom, has long airflow circulation path and large circulation resistance, can not stably adapt to the heat exchange requirement of high-flow high-temperature waste gas, easily solves the problems of bias airflow and uneven heat exchange, and leads to large fluctuation of overall heat exchange efficiency and incapability of maintaining stable waste heat recovery effect. In addition, this prior art waste heat utilization form is single, can't directly produce available industrial hot water. To sum up, the existing waste heat utilization system using the spray packed tower as the core can only adapt to the waste gas scene of medium and low temperature and low dust and oil content, and cannot solve the problem of high-efficiency waste heat recovery of 200 ℃ high-flow high-temperature industrial waste gas, and cannot meet the requirement of high-efficiency heat exchange, so that the development of a hot water boiler utilizing the waste heat of high-temperature waste gas with high heat exchange efficiency and stable structure is needed. Disclosure of Invention The application aims to provide a hot water boiler utilizing the residual heat of high-temperature waste gas. In order to achieve the above purpose, the present invention adopts the following technical scheme: A hot water boiler utilizing waste heat of high-temperature waste gas comprises a boiler frame 1, a water storage frame 2 arranged in the boiler frame 1, a plurality of hot air conveying pipe