阅读说明：本技术 一种废气余热回收燃气节能热风炉 (Waste gas waste heat recovery gas energy-saving hot blast stove ) 是由 陆学中 潘久君 潘保利 于 2020-03-19 设计创作，主要内容包括：本发明是一种废气余热回收燃气节能热风炉。其机体结构由燃烧器(1)、燃烧室(2)、废气回收室(3)、混风室(5)、阻燃板(6)、沉降室(8)、配风门(10)、低温废气回收管(11)、冷却废气回收管(12)等组成,废气回收室(3)外筒一侧与低温废气回收管(11)连接,另一侧与冷却废气回收管(12)连接,低温干燥段废气和冷却段废气分别经低温废气回收管(11)和冷却废气回收管(12)进入废气回收室(3)后,在混风室(5)与高温气体混合再加热后供给干燥机高温干燥段干燥谷物,实现余热回收利用,与无废气余热回收燃气热风炉相比,利用干燥机废气余热20-30％,减少燃料消耗15-25％,节能效果显著,降低烘干成本,是粮食、种子、饲料干燥机等理想配套热源。(The invention relates to a waste gas waste heat recovery gas energy-saving hot blast stove. The machine body structure of the waste heat recovery and drying machine comprises a combustor (1), a combustion chamber (2), a waste gas recovery chamber (3), a wind mixing chamber (5), a flame-retardant plate (6), a settling chamber (8), an air distribution door (10), a low-temperature waste gas recovery pipe (11), a cooling waste gas recovery pipe (12) and the like, wherein one side of an outer cylinder of the waste gas recovery chamber (3) is connected with the low-temperature waste gas recovery pipe (11), the other side of the outer cylinder of the waste gas recovery chamber is connected with the cooling waste gas recovery pipe (12), after the low-temperature drying section waste gas and the cooling section waste gas enter the waste gas recovery chamber (3) through the low-temperature waste gas recovery pipe (11) and the cooling waste gas recovery pipe (12) respectively, the waste gas is mixed with high-temperature gas and reheated in the wind mixing chamber (5) and then is supplied to a high-temperature drying section of the drying machine to dry grains, thereby realizing the waste heat recovery and utilization, compared with a gas hot blast stove without waste heat recovery and waste heat, the waste heat recovery and the waste gas waste heat utilization of the drying machine is realized by 20-30 percent, and the fuel consumption is reduced by 15-25 percent, the energy-saving effect is remarkable, the drying cost is reduced, and the energy-saving heat source is an ideal matched heat source for grain, seed and feed dryers and the like.)

1. The utility model provides an energy-conserving hot-blast furnace of waste gas waste heat recovery gas which characterized in that: the waste gas drying device is matched with a hot air dryer of 2-level or above, one side of an outer cylinder of a waste gas recovery chamber (3) is connected with a low-temperature waste gas recovery pipe (11), the other side of the outer cylinder is connected with a cooling waste gas recovery pipe (12), and waste gas of a low-temperature drying section and waste gas of a cooling section respectively enter the waste gas recovery chamber (3) through the low-temperature waste gas recovery pipe (11) and the cooling waste gas recovery pipe (12) and are mixed with high-temperature gas in a gas mixing chamber (5) to be reheated and then supplied to a high-temperature drying section of the drying machine, so that waste heat recovery and utilization are realized.

2. The energy efficient hot blast stove according to claim 1, characterized in that: after the gas is ignited in the burner (1), the opening degree of the air distribution door (10) is adjusted to ensure that the burning flame continuously and stably burns in the combustion chamber (2), the gas is sprayed out from the flame outlet (4) to enter the air mixing chamber (5), meanwhile, hot air generated by the burning of the other burner is directly supplied to a low-temperature drying section for drying grains, evaporated waste gas enters a low-temperature waste gas recovery pipe (11) through a dust settling chamber of a drier under the action of an air blower, simultaneously, after grains are cooled by a fan at a cooling section, waste gas at the cooling section enters a cooling waste gas recovery pipe (12) under the action of the fan, the waste gas at the low-temperature drying section and the waste gas at the cooling section respectively enter a waste gas recovery chamber (3) through the low-temperature waste gas recovery pipe (11) and the cooling waste gas recovery pipe (12) under the combined action of the fan at the high-temperature drying section and the fan at the cooling section, and then are mixed with high-temperature gas and reheated in the air mixing chamber (5), at this time, part of dust, a small amount of light rice hulls or corn husks and the like carried in the waste gas of the low-temperature drying section and the waste gas of the cooling section are ignited and combusted, due to the blocking of the flame-retardant plate (6), dust and unburnt particles generated by combustion settle in the settling chamber (8), high-temperature gas is sucked into a high-temperature drying section air heater through a hot air outlet (7) and then is sent to a high-temperature drying section of the drying machine, a large amount of water vapor generated by heating grains is discharged out of the drying machine, the dust falling into the bottom of the settling chamber (8) is cleaned and discharged through an ash cleaning door (9) or is discharged through a dust removing auger, the gap between an inner cylinder and an outer cylinder of the combustion chamber (2) is 200-600mm, the larger the heat productivity of the combustor (1), the larger the diameter of the inner cylinder and the outer cylinder of the combustion chamber (2), the larger the sectional areas of the low-temperature waste gas recovery pipe (11) and the cooling waste gas recovery pipe (12), and the longer the length of the settling chamber (9) is more than 1500 mm.

Technical Field

The invention relates to a heat source device for a dryer of grain, seed, oil and feed of agricultural machinery.

Background

The heat source devices matched with 2-grade and above hot air dryers for grains, seeds, oil and feed in the market at present are mostly coal-fired and oil-fired hot air furnaces, and then are fuel-fired and biomass hot air furnaces, which are commonly brick-mixed masonry type coal-fired hot air furnaces and fuel-fired and gas hot air furnaces without waste gas waste heat recovery, the coal-fired hot air furnaces have serious environmental pollution and do not meet the national environmental protection requirements, the coal-fired hot air furnaces are gradually eliminated products under the environmental protection limitation at present, the gas hot air furnaces without waste gas waste heat recovery comprise natural gas, liquefied gas, coal gas and the like, the environmental influence is great, particularly during the winter drying in the northern autumn, the environmental temperature is below 0 ℃, the lowest temperature is about-30 ℃, the problems of large gas consumption, non-energy conservation, high energy consumption of dryers, high drying cost, or incapability of use due to high gas price and the like are caused.

Disclosure of Invention

The invention aims to overcome the defects of the waste gas-free waste heat recovery gas hot blast stove and provides a waste gas-free waste heat recovery gas energy-saving hot blast stove. The gas of the energy-saving hot blast stove is sprayed into a combustion chamber by a burner for combustion, under the negative pressure action of a high-temperature drying section fan, the waste gas of a low-temperature drying section of the dryer and the waste gas of a cooling section are sucked into a waste gas recovery chamber, the recovered waste gas is gradually heated and enters a gas mixing chamber to be mixed with the high-temperature gas for reheating, part of dust in the recovered waste gas, rice husks or corn husks and the like are ignited, the part of the dust is blocked by a flame retardant plate when entering a settling chamber, the unburned rice husks or corn husks and the like fall into the settling chamber, the high-temperature gas is sucked into a high-temperature drying section of the dryer by a hot blast heater after continuously going forward through a hot blast pipeline and is supplied to the high-temperature drying section of the dryer for continuous flaming combustion, the waste gas of the low-temperature drying section is continuously recovered by the waste gas recovery chamber and the waste gas of the cooling section is reheated and then is supplied to the high-temperature drying section of the dryer for drying of the grains, and the waste heat recovery is realized. Compared with a gas hot blast stove without waste gas heat recovery, the energy-saving hot blast stove can recover 20-30% of waste gas heat of a dryer, save 15-25% of fuel consumption and has obvious energy-saving effect, and because the temperature of the recovered waste gas of a low-temperature drying section is always 30-40 ℃ no matter the ambient temperature, the humidity of the waste gas is below 70%, the temperature of a cooling section is 8-30 ℃ and the humidity of the waste gas is below 50%, the lower the ambient temperature is, the more obvious the energy-saving effect is, and a series of problems of high gas consumption, high energy consumption and the like are solved.

The technical scheme adopted by the invention for solving the technical problems is as follows: in the figures 1, 2 and 3, after the gas is ignited in the burner (1), the burning flame continuously burns in the combustion chamber (2), and is sprayed out from the flame outlet (4) to enter the air mixing chamber (5), under the negative pressure of the high temperature drying section fan and the combined action of the low temperature drying section fan and the cooling section fan, the low temperature drying section waste gas and the cooling section waste gas respectively pass through the low temperature waste gas recovery pipe (11) and the cooling waste gas recovery pipe (12), enter the waste gas recovery chamber (3), and then are mixed with the high temperature gas in the air mixing chamber (5) for reheating, at this time, part of dust, a small amount of light rice hulls or corn husks and the like carried in the low temperature drying section waste gas and the cooling section waste gas are ignited and burnt, because of the blocking of the flame retardant plate (6), the dust and the unburnt particles and the like generated by the burning settle in the settling chamber (8), and the high temperature hot air passes through the high temperature hot air outlet (7), and (4) sucking the grains by a hot air blower in the high-temperature drying section, and then sending the grains to a high-temperature drying section of a dryer for drying. Therefore, the combustion of the fuel gas in the combustion chamber (2) is realized, the fuel gas is mixed with the waste gas of the low-temperature drying section and the waste gas of the cooling section in the air mixing chamber (5), and the formed high-temperature hot air is supplied to the high-temperature drying section for drying grains, so that the waste heat of the waste gas of the dryer is recycled, the suction of a large amount of cold air is reduced, the fuel gas consumption is reduced, the energy is saved, and the energy is saved and the environment is protected.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a front view of an energy-saving hot blast stove

FIG. 2 is a left side view of FIG. 1

FIG. 3 is a top view of FIG. 1

The part numbers in fig. 1, 2, 3 illustrate;

1. the device comprises a combustor, 2, a combustion chamber, 3, a waste gas recovery chamber, 4, a firework outlet, 5, an air mixing chamber, 6, a flame retardant plate, 7, a hot air outlet, 8, a settling chamber, 9, an ash removal door, 10, an air distribution door, 11, a low-temperature waste gas recovery pipe and 12, a cooling waste gas recovery pipe.

Detailed Description

The following describes preferred embodiments of the present invention with reference to the accompanying drawings. In fig. 1, 2 and 3, the gas energy-saving hot-blast stove is implemented as follows: after the gas is ignited in the burner (1), the opening degree of the air distribution door (10) is adjusted to ensure that the flame continuously and stably burns in the combustion chamber (2), high-temperature hot air is sprayed out from a flame outlet (4) and enters the air mixing chamber (5), meanwhile, hot air generated by the combustion of the other gas furnace burner is directly supplied to a low-temperature drying section for drying grains, evaporated waste gas enters a low-temperature waste gas recovery pipe (11) through a dust settling chamber of a dryer under the action of an air blower, simultaneously, after grains are cooled by a fan at a cooling section, waste gas at the cooling section enters a cooling waste gas recovery pipe (12) under the action of the fan, the waste gas at the low-temperature drying section and the waste gas at the cooling section respectively enter a waste gas recovery chamber (3) through the low-temperature waste gas recovery pipe (11) and the cooling waste gas recovery pipe (12) under the negative pressure action of the fan at the high-temperature drying section and the combined action of the fan at the low-temperature drying section, the high-temperature gas is mixed with the combusted high-temperature gas in the air mixing chamber (5) and then heated, at the moment, part of dust, a small amount of light rice husks or corn husks and the like carried in the waste gas of the low-temperature drying section and the waste gas of the cooling section are ignited and combusted, because the blocking of the flame-retardant plate (6) and the wind speed of the high-temperature gas are reduced, dust and unburnt particles generated by combustion are settled in the settling chamber (8), the high-temperature gas is sucked by the hot air blower of the high-temperature drying section after passing through the hot air outlet (7) and then is sent to the high-temperature drying section of the drying machine, a large amount of water vapor generated by heating the grains is discharged outside the drying machine, and the dust falling into the bottom of the settling chamber (8) is cleaned and discharged through the dust cleaning door (9) or is discharged by arranging a dust removing auger. Thus, the combustion of the fuel gas in the combustion chamber (2) is realized, and the fuel gas is mixed with the waste gas of the low-temperature drying section and the waste gas of the cooling section in the air mixing chamber (5) and then heated to form high-temperature gas which is supplied to the high-temperature drying section for drying grains; the clearance between the inner cylinder and the outer cylinder of the combustion chamber (2) is 200-600mm, the larger the heat productivity of the combustor (1), the larger the diameters of the inner cylinder and the outer cylinder of the combustion chamber (2), the larger the sectional areas of the low-temperature waste gas recovery pipe (11) and the cooling waste gas recovery pipe (12), and the longer the settling chamber (8) is than 1500mm, which is beneficial to settling dust and particles.