Straw briquetting corner tube boiler

Abstract

The utility model relates to the technical field of boilers, in particular to a straw briquetting corner tube boiler, and in the straw briquetting corner tube boiler, straw is combusted in a combustion chamber to generate high-temperature flue gas. High-temperature flue gas enters the settling chamber through the first communicating hole, and in the settling chamber, large-particle dust settles under the action of gravity and inertia. And the flue gas subjected to preliminary sedimentation enters the heating chamber through the second communicating hole to heat the heated pipe penetrating through the heating chamber. One end of the heating pipe is communicated with the lower boiler barrel, the other end of the heating pipe is communicated with the upper boiler barrel, water circulation is formed, and heat transfer and utilization are achieved. The settling chamber is additionally arranged to effectively reduce the amount of dust entering the heating chamber and the heated pipe, reduce the dust deposition speed of the heated pipe and prolong the maintenance period and the service life of the heated pipe. The boiler can be widely applied to the technical field of boilers.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler technical field, concretely relates to a straw briquette angle tube boiler. BACKGROUND

[0002] Straw as a kind of renewable energy its cost is lower, and a large number of angle tube boilers begin to use straw as fuel.In this kind of boiler, upper drum is mainly used to store steam-water mixture and realize steam-water separation, so as to provide high-quality steam.The lower drum is responsible for distributing and collecting working medium and maintaining the stability of water circulation.Heated pipes play a key role in it, one end of which is communicated with the lower drum, and the other end is communicated with the upper drum, forming a complete water circulation loop.Through such design, the heated pipe can efficiently transfer the heat generated by combustion to the working medium in the pipe, realizing energy conversion.

[0003] However, due to the fact that straw combustion produces a large amount of dust, these dusts flow with flue gas and easily adhere to the surface of the heated pipe.The dust on the surface of the heated pipe can seriously affect its heat transfer performance, resulting in a decrease in heat transfer efficiency.This not only affects the heating effect of the working medium in the upper and lower drums, affecting the yield and quality of steam, but also may cause damage to the heated pipe due to local overheating, and even affect the safe and stable operation of the entire boiler. SUMMARY

[0004] In view of the problem that a large amount of dust produced by straw combustion easily adheres to the surface of the heated pipe, reducing the heat transfer performance of the heated pipe and the heating effect of the working medium of the boiler, the utility model provides a straw briquette angle tube boiler.

[0005] To solve the above technical problems, the utility model solves them by the following technical schemes:

[0006] A straw briquette angle tube boiler, comprising a boiler main body, wherein the boiler main body is provided with an upper drum, a lower drum, a combustion chamber and a heated pipe, and a settling chamber is arranged above the combustion chamber, a heating chamber is arranged above the settling chamber, a first communication hole is formed in the bottom wall of the settling chamber and communicated with the combustion chamber, a second communication hole is formed in the top wall of the settling chamber and communicated with the heating chamber, one end of the heated pipe is communicated with the lower drum, and the other end of the heated pipe is communicated with the upper drum through the heating chamber.

[0007] In the straw briquette angle tube boiler, the straw is combusted in the combustion chamber to generate high-temperature flue gas. The high-temperature flue gas enters the settling chamber through the first communication hole. In the settling chamber, the larger particles of dust settle under the action of gravity and inertia. The flue gas after preliminary settling enters the heating chamber through the second communication hole to heat the heat pipes passing through the heating chamber. The working medium in the heat pipes absorbs heat, one end of which is communicated with the lower drum, and the other end is communicated with the upper drum, forming a water circulation to realize heat transfer and utilization. The addition of the settling chamber can effectively reduce the amount of dust entering the heating chamber and the heat pipes, reduce the speed of dust accumulation in the heat pipes, and prolong the maintenance cycle and service life.

[0008] As preferred; the inner side wall of the settling chamber is staggered with a plurality of baffles, and each baffle and the inner wall of the settling chamber form an airflow passage for the hot gas to pass through.

[0009] When the flue gas enters the settling chamber, it will encounter the staggered baffles. Due to the blocking and airflow direction changing effect of the baffles, the flow path of the flue gas becomes tortuous. When the airflow is diverted, the dust particles in the flue gas cannot follow the airflow in time due to their large inertia, and thus separate from the airflow and settle down. At the same time, the airflow passage formed between the baffle and the inner wall of the settling chamber allows the flue gas to continue to flow and eventually enter the heating chamber through the second communication hole. The dust capturing capacity of the settling chamber is improved, and the cleanliness inside the boiler is better guaranteed

[0010] As preferred; one side wall of the baffle is fixedly connected with the inner side wall of the settling chamber, and the remaining three side walls of the baffle and the inner side wall of the settling chamber are spaced apart and do not contact each other; and a scraper ring is sleeved on the baffle, and the scraper ring can move along the baffle.

[0011] In the settling chamber, one side wall of the baffle is fixedly connected with the inner side wall of the settling chamber, and the remaining three side walls are spaced apart from the inner side wall. When the flue gas passes through, the dust settles under the action of the baffle. The scraper ring sleeved on the baffle can move along the baffle to scrape off the dust deposited on the baffle, preventing the dust from accumulating too much on the baffle to affect the settling effect.

[0012] As preferred; a sliding rail is formed on the baffle, and an electric sliding block movable along the sliding rail is arranged in the sliding rail, and the scraper ring is fixed on the electric sliding block.

[0013] In the sliding rail formed on the baffle, the electric sliding block can move along the sliding rail under the power drive. The scraper ring is fixed on the electric sliding block, and can move along the surface of the baffle with the movement of the electric sliding block.

[0014] As preferred; the end of the baffle away from the inner wall of the settling chamber is inclined downward.

[0015] The end of the baffle plate away from the inner wall of the settling chamber is inclined downward. When the flue gas passes through the baffle plate, the dust is more likely to slide downward along the inclined plate surface under the action of inertia and gravity rather than being accumulated at the end of the baffle plate. The natural falling tendency of the dust is enhanced, and the dust settling efficiency is improved

[0016] As preferred, a plurality of mounting shafts are further included, two ends of the mounting shafts are fixed on the side wall of the first communication hole respectively, a rotating ring rotatable along the mounting shaft is sleeved on the mounting shaft, and blades are uniformly distributed on the side wall of the rotating ring.

[0017] When the high-temperature flue gas passes through the first communication hole into the settling chamber from the combustion chamber, the flowing flue gas will impact on the blades uniformly distributed on the side wall of the rotating ring. Due to the impact force of the flue gas, the rotating ring sleeved on the mounting shaft will rotate along the mounting shaft. The rotating blades can play a certain spoiler effect on the entering flue gas, so that the dust particles in the flue gas are more easily separated and settled.

[0018] As preferred, a dust removal door is arranged on the wall of the settling chamber.

[0019] When a certain amount of dust accumulates in the settling chamber and needs to be cleaned, the dust removal door can be opened for manual or mechanical dust removal operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a sectional view of the straw briquette angle tube boiler in the embodiment;

[0021] Fig. 2 It is a structural schematic view of the mounting shaft in the embodiment;

[0022] Fig. 3 It is a structural schematic view of the baffle plate in the embodiment.

[0023] The names of the parts referred to by the respective numbers in the drawings are as follows:

[0024] 110, boiler body; 1101, upper drum; 1102, lower drum; 1103, combustion chamber; 1104, steam pipe; 1105, return pipe; 120, heating pipe; 130, settling chamber; 1301, first communication hole; 1302, second communication hole; 140, heating chamber; 150, baffle plate; 1501, sliding rail; 1502, electric sliding block; 160, scraping ring; 170, mounting shaft; 1701, rotating ring; 1702, blade. DETAILED DESCRIPTION

[0025] In order to further understand the content of the present application, the present application will be described in detail in conjunction with the drawings and embodiments. It should be understood that the embodiments are only used to explain the present application but not to limit the present application.

[0026] Embodiment

[0027] As Figs. 1-3 shown in the embodiment, the straw briquette angle tube boiler includes a boiler body 110. Inside the boiler body 110, from top to bottom, there are a heating chamber 140, a settling chamber 130 and a combustion chamber 1103, and inside, there are an upper drum 1101 and a lower drum 1102. One end of the heat receiving tube 120 communicates with the lower drum 1102, and the other end passes through the heating chamber 140 and communicates with the upper drum 1101.

[0028] The bottom wall of the settling chamber 130 is provided with a first communication hole 1301 communicating with the combustion chamber 1103, and the top wall is provided with a second communication hole 1302 communicating with the heating chamber 140. The inner side wall of the settling chamber 130 is staggered with a plurality of baffles 150. One side wall of the baffle 150 is fixedly connected with the inner side wall of the settling chamber 130, and the other three side walls have a gap between the inner wall of the settling chamber 130. A sliding rail 1501 is formed on the baffle 150, and an electric sliding block 1502 is arranged in the sliding rail 1501. A scraping ring 160 is fixed on the electric sliding block 1502, and the end of the baffle 150 away from the inner wall of the settling chamber 130 is inclined downward. A plurality of installation shafts 170 are fixed on the side wall of the first communication hole 1301, and a rotatable rotating ring 1701 is sleeved on the installation shaft 170. The side wall of the rotating ring 1701 is uniformly distributed with blades 1702. A dust removal door is also formed on the wall of the settling chamber 130. The upper drum 1101 is provided with a steam pipe 1104 for discharging high-temperature steam. The upper drum 1101 and the lower drum 1102 are connected by a reflux pipe 1105.

[0029] Principle of use:

[0030] The straw burns in the combustion chamber 1103 to produce high-temperature flue gas, which enters the settling chamber 130 through the first communication hole 1301 in the bottom wall of the settling chamber 130. At the first communication hole 1301, the flue gas impacts the blades 1702 on the rotating ring 1701, causing the rotating ring 1701 to start rotating, which disturbs the flow of flue gas and promotes dust separation.

[0031] The flue gas entering the settling chamber 130 encounters the staggered baffles 150 with one end inclined, and the airflow path becomes tortuous, and the dust settles due to inertia and gravity. When the surface of the baffle 150 accumulates dust for a long time, the electric sliding block 1502 is started, and the scraping ring 160 sleeved on the baffle 150 moves along the baffle 150 under the drive of the electric sliding block 1502, and the deposited dust is scraped off.

[0032] The flue gas after preliminary settling enters the heating chamber 140 through the second communication hole 1302 in the top wall of the settling chamber 130 to heat the heat receiving tube 120. The work enters the heat receiving tube 120 from the lower drum 1102, the working medium in the heat receiving tube 120 absorbs heat in the heating chamber 140, and then enters the upper drum 1101 to perform gas-liquid separation, high-temperature steam is discharged from the steam pipe 1104 to provide high-temperature steam required by the outside world; the condensed liquid reenters the lower drum 1102 through the reflux pipe 1105, and then the water circulation is formed between the upper drum 1101 and the lower drum 1102 to realize heat transfer and utilization. When the dust in the settling chamber 130 accumulates to a certain degree, the dust removal door can be opened for cleaning.

[0033] Through the above setting, the amount of dust entering the heating chamber 140 and the surface of the heat receiving tube 120 is significantly reduced, the dust accumulation speed of the heat receiving tube 120 is reduced, the equipment maintenance cycle and service life are prolonged. The dust capturing and settling capacity of the settling chamber 130 is enhanced, the cleanliness inside the boiler is improved, and the operation efficiency is guaranteed. The disturbance effect of the rotating ring 1701 effectively promotes the separation and settlement of dust, and improves the overall dust removal effect.

[0034] In summary, the above is only a preferred embodiment of the present embodiment, and any changes and modifications made according to the patent scope of the present embodiment should be within the scope of the present embodiment.

Claims

1. A straw briquette corner tube boiler, comprising a boiler body (110), wherein an upper drum (1101), a lower drum (1102), a combustion chamber (1103) and a heating tube (120) are arranged in the boiler body (110), characterized in that: The application further comprises a settling chamber (130) arranged above the combustion chamber (1103), a heating chamber (140) arranged above the settling chamber (130), a first communication hole (1301) arranged on the bottom wall of the settling chamber (130) and communicated with the combustion chamber (1103), and a second communication hole (1302) arranged on the top wall of the settling chamber (130) and communicated with the heating chamber (140); one end of the heated pipe (120) is communicated with the lower kettle cylinder (1102), and the other end of the heated pipe (120) is communicated with the upper kettle cylinder (1101) through the heating chamber (140).

2. A straw bale corner tube boiler according to claim 1, characterized in that: The inner side wall of the settling chamber (130) is arranged with a plurality of baffles (150) in a staggered manner, and the baffle (150) and the inner wall of the settling chamber (130) form an airflow channel for hot gas.

3. A straw bale corner tube boiler according to claim 2, characterised in that: One side wall of the baffle (150) is fixedly connected with the inner side wall of the settling chamber (130), and the remaining three side walls of the baffle (150) are spaced apart from the inner side wall of the settling chamber (130) and do not contact each other; a scraper ring (160) is sleeved on the baffle (150), and the scraper ring (160) can move along the baffle (150).

4. A straw bale corner tube boiler according to claim 3, characterised in that: The baffle (150) is arranged with a sliding rail (1501), the sliding rail (1501) is arranged with an electric sliding block (1502) which can move along the sliding rail (1501), and the scraper ring (160) is fixed on the electric sliding block (1502).

5. A straw bale corner tube boiler according to claim 2, characterised in that: The end of the baffle (150) away from the inner wall of the settling chamber (130) is inclined downward.

6. A straw bale corner tube boiler according to claim 1, characterized in that: A plurality of mounting shafts (170) are arranged, two ends of the mounting shaft (170) are fixed on the side wall of the first communication hole (1301), respectively, a rotating ring (1701) which can rotate along the mounting shaft (170) is sleeved on the mounting shaft (170), and the side wall of the rotating ring (1701) is uniformly arranged with blades (1702).

7. A straw bale corner tube boiler according to claim 1, characterized in that: The side wall of the settling chamber (130) is arranged with an ash removal door.

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