CN204704825U - A kind of extremely low concentration coal mine gas boiler - Google Patents
A kind of extremely low concentration coal mine gas boiler Download PDFInfo
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Abstract
本实用新型涉及一种极低浓度煤矿瓦斯锅炉，其包括掺混鼓风机、抽排瓦斯安全阀组、瓦斯掺混装置、换向阀组、锅炉本体、引风机、锅炉引风机和烟囱；抽排瓦斯管道通过抽排瓦斯安全阀组连接瓦斯掺混装置瓦斯进口，掺混鼓风机连接瓦斯掺混装置空气进口，瓦斯掺混装置出口通过换向阀组连接锅炉本体；换向阀组连接引风机，锅炉本体烟气出口连接锅炉引风机，引风机和锅炉引风机都连接烟囱；锅炉本体內横向设置一锅筒，锅炉本体与锅筒之间形成液体腔室；在锅筒内腔一侧设置有燃烧装置，另一侧设置对流换热面，燃烧装置中的陶瓷蓄热材料层由第一耐火材料层分为第一陶瓷蓄热材料层和第二陶瓷蓄热材料层。本实用新型可以广泛应用于煤矿瓦斯的燃烧系统中。
The utility model relates to an extremely low-concentration coal mine gas boiler, which comprises a mixing blower, a gas extraction safety valve group, a gas mixing device, a reversing valve group, a boiler body, an induced fan, a boiler induced fan and a chimney; The gas pipeline is connected to the gas inlet of the gas mixing device through the exhaust gas safety valve group, the mixing blower is connected to the air inlet of the gas mixing device, and the outlet of the gas mixing device is connected to the boiler body through the reversing valve group; the reversing valve group is connected to the induced draft fan, The flue gas outlet of the boiler body is connected to the boiler induced draft fan, and both the induced draft fan and the boiler induced draft fan are connected to the chimney; a drum is arranged horizontally in the boiler body, and a liquid chamber is formed between the boiler body and the drum; The other side of the combustion device is provided with a convective heat exchange surface, and the ceramic heat storage material layer in the combustion device is divided into a first ceramic heat storage material layer and a second ceramic heat storage material layer by the first refractory material layer. The utility model can be widely used in coal mine gas combustion systems.
Description
技术领域technical field
本实用新型涉及一种锅炉，特别是关于一种极低浓度煤矿瓦斯锅炉。The utility model relates to a boiler, in particular to an extremely low concentration coal mine gas boiler.
背景技术Background technique
我国煤矿每年向大气排放的甲烷量达190亿m3，居世界第一，约占中国工业生产中甲烷排放量的三分之一，而其中通过煤矿抽采泵站排入大气的甲烷约为60～75亿m3，为西气东输工程设计年输气量的50％～63％。当前煤矿瓦斯抽采泵站抽采出的瓦斯气体，其甲烷浓度一般在2％～30％；除少量甲烷浓度高于9％的抽排瓦斯可以用于内燃机发电以外，甲烷浓度低于9％的抽排瓦斯目前全部排放大气。甲烷、空气预混气体的爆炸极限范围为5％～15％；对于甲烷浓度为2％～3％的极低浓度煤矿瓦斯来说，由于存在大量过剩空气因而绝热燃烧温度降低，在自然条件下不会燃烧、爆炸，应用、处理难度极大，目前没有成熟的处理、利用技术，也没有能以甲烷浓度为2％～3％的极低浓度煤矿瓦斯作为燃料的燃烧系统。China's coal mines emit 19 billion m 3 of methane into the atmosphere every year, ranking first in the world, accounting for about one-third of China's methane emissions from industrial production, and the amount of methane discharged into the atmosphere through coal mine pumping stations is about 6-7.5 billion m 3 , which is 50%-63% of the designed annual gas transmission volume of the West-East Gas Transmission Project. The methane concentration of the methane gas extracted by the current coal mine gas extraction pump station is generally 2% to 30%; except for a small amount of methane concentration higher than 9%, the methane concentration is lower than 9% except that the exhausted gas can be used for internal combustion engine power generation At present, all the extraction gas is discharged into the atmosphere. The explosion limit of methane and air premixed gas ranges from 5% to 15%. For extremely low concentration coal mine gas with methane concentration of 2% to 3%, the adiabatic combustion temperature decreases due to the presence of a large amount of excess air. Under natural conditions It will not burn or explode, and its application and treatment are extremely difficult. At present, there is no mature treatment and utilization technology, and there is no combustion system that can use extremely low concentration coal mine gas with a methane concentration of 2% to 3% as fuel.
发明内容Contents of the invention
针对上述问题，本实用新型的目的是提供一种可有效提高甲烷浓度为2％～3％的极低浓度煤矿瓦斯的氧化率，充分利用瓦斯氧化产生的热量，减少锅炉内热量损失的一种极低浓度煤矿瓦斯锅炉。In view of the above problems, the purpose of this utility model is to provide a method that can effectively increase the oxidation rate of extremely low-concentration coal mine gas with a methane concentration of 2% to 3%, make full use of the heat generated by gas oxidation, and reduce the heat loss in the boiler. Very low concentration coal mine gas boiler.
为实现上述目的，本实用新型采取以下技术方案：一种极低浓度煤矿瓦斯锅炉，其特征在于：它包括掺混鼓风机、抽排瓦斯安全阀、瓦斯掺混装置、换向阀组、锅炉本体、锅炉引风机、引风机和烟囱；抽排瓦斯管道通过所述抽排瓦斯安全阀连接所述瓦斯掺混装置的瓦斯进口，所述掺混鼓风机连接所述瓦斯掺混装置的空气进口，所述瓦斯掺混装置的出口通过所述换向阀组连接所述锅炉本体；所述锅炉本体的烟气出口连接所述锅炉引风机的进风口，所述锅炉本体还通过所述换向阀组连接所述引风机的进风口，所述锅炉引风机和所述引风机的出风口都连接至所述烟囱；In order to achieve the above purpose, the utility model adopts the following technical solutions: an extremely low concentration coal mine gas boiler, which is characterized in that it includes a mixing blower, a gas extraction safety valve, a gas mixing device, a reversing valve group, and a boiler body , boiler induced draft fan, induced draft fan and chimney; the exhaust gas pipeline is connected to the gas inlet of the gas blending device through the exhaust gas safety valve, and the blending blower is connected to the air inlet of the gas blending device, so The outlet of the gas mixing device is connected to the boiler body through the reversing valve group; the flue gas outlet of the boiler body is connected to the air inlet of the boiler induced draft fan, and the boiler body is also passed through the reversing valve group Connect the air inlet of the induced draft fan, the boiler induced draft fan and the air outlet of the induced draft fan are both connected to the chimney;
所述锅炉本体內横向设置有一锅筒，所述锅炉本体的炉壁与所述锅筒的管壁之间形成一液体腔室；在所述锅筒的内腔一侧设置有燃烧装置，另一侧设置有对流换热面，所述燃烧装置位于所述对流换热面底部；所述燃烧装置包括带有通孔的陶瓷蓄热材料层和第一耐火材料层，所述第一耐火材料层位于所述陶瓷蓄热材料层的中部，将所述陶瓷蓄热材料层分为对称的第一陶瓷蓄热材料层和第二陶瓷蓄热材料层；在位于所述锅筒一端口的所述锅炉本体的端面上靠近燃烧装置的部位设置有第一进出口和第二进出口，所述第一进出口与所述第一陶瓷蓄热材料层连通，所述第二进出口与所述第二陶瓷蓄热材料层连通；所述锅炉本体的烟气出口设置在位于所述锅筒另一端口的所述锅炉本体的端面上靠近所述对流换热面的部位。A drum is horizontally arranged in the boiler body, and a liquid chamber is formed between the furnace wall of the boiler body and the tube wall of the drum; a combustion device is arranged on one side of the inner cavity of the drum, and One side is provided with a convective heat exchange surface, and the combustion device is located at the bottom of the convection heat exchange surface; the combustion device includes a ceramic heat storage material layer with through holes and a first refractory material layer, and the first refractory material The ceramic heat storage material layer is located in the middle of the ceramic heat storage material layer, and the ceramic heat storage material layer is divided into a symmetrical first ceramic heat storage material layer and a second ceramic heat storage material layer; A first inlet and outlet and a second inlet and outlet are provided on the end surface of the boiler body close to the combustion device, the first inlet and outlet communicate with the first ceramic heat storage material layer, and the second inlet and outlet communicate with the first ceramic heat storage material layer. The second ceramic heat storage material layer is connected; the flue gas outlet of the boiler body is arranged on the end surface of the boiler body at the other port of the drum, close to the convective heat exchange surface.
所述换向阀组包括第一换向阀、第二换向阀、第三换向阀和第四换向阀；所述第一换向阀的一端和所述第二换向阀的一端并联至所述瓦斯掺混装置的出口；所述第一换向阀的另一端连接所述第三换向阀的一端；所述第二换向阀的另一端连接所述第四换向阀的一端；所述第三换向阀的另一端和所述第四换向阀的另一端并联至所述引风机的进风口；所述锅炉本体的所述第一进出口与所述第一换向阀和所述第三换向阀之间的管道连通；所述锅炉本体的所述第二进出口与所述第二换向阀和所述第四换向阀之间的管道连通。The reversing valve group includes a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve; one end of the first reversing valve and one end of the second reversing valve connected in parallel to the outlet of the gas mixing device; the other end of the first reversing valve is connected to one end of the third reversing valve; the other end of the second reversing valve is connected to the fourth reversing valve The other end of the third reversing valve and the other end of the fourth reversing valve are connected in parallel to the air inlet of the induced draft fan; the first inlet and outlet of the boiler body are connected to the first The pipe between the reversing valve and the third reversing valve is connected; the second inlet and outlet of the boiler body is connected with the pipe between the second reversing valve and the fourth reversing valve.
在所述锅炉本体底部靠近所述锅炉本体的所述第一进出口和所述第二进出口处设置有冷水进口，在所述锅炉本体上部靠近所述锅炉本体的烟气出口处设置有热水蒸汽出口。A cold water inlet is provided at the bottom of the boiler body near the first inlet and outlet and the second inlet and outlet of the boiler body, and a hot water inlet is arranged at the upper part of the boiler body near the flue gas outlet of the boiler body. Water vapor outlet.
所述对流换热面由换热管构成，所述对流换热面的烟气出口与所述锅炉本体的烟气出口连通。The convective heat exchange surface is composed of heat exchange tubes, and the flue gas outlet of the convective heat exchange surface communicates with the flue gas outlet of the boiler body.
在所述陶瓷蓄热材料层外部设置有第二耐火材料层。A second refractory material layer is arranged outside the ceramic heat storage material layer.
所述锅炉本体的外壁设置有保温材料层。The outer wall of the boiler body is provided with an insulating material layer.
本实用新型由于采取以上技术方案，其具有以下优点：1、本实用新型由于采用将陶瓷蓄热材料层分为两部分，瓦斯在其中一部分进行氧化放出的部分热量对另一部分进行加热，作为瓦斯在另一部分进行氧化所需要的热量，实现了热量的循环利用，减少了能量的损耗。2、本实用新型由于采用换热阀组使得本实用新型中的极低浓度煤矿瓦斯锅炉可以实现周期性往复切换运行，可有效保持陶瓷蓄热材料层的温度，满足甲烷浓度为2％～3％的极低浓度煤矿瓦斯在陶瓷蓄热材料层中进行氧化所需的热量。3、本实用新型由于采用将燃烧装置与对流换热面均设置在锅炉本体内的锅筒内腔中，使得锅炉本体的炉壁与锅筒的管壁之间形成液体腔室，液体腔室内的液体通过对流换热面充分吸收甲烷浓度为2％～3％的极低浓度煤矿瓦斯氧化产生的部分高温烟气的热量，有效提高了热量的回收利用率。4、本实用新型由于在陶瓷蓄热材料层外部设置有耐火材料层，且在锅炉本体的外壁设置有保温材料层，大大地减少了热量的损失。综上所述，本实用新型可以广泛应用于煤矿瓦斯的燃烧系统中。Due to the adoption of the above technical scheme, the utility model has the following advantages: 1. The utility model divides the ceramic heat storage material layer into two parts, and part of the heat released by the oxidation of the gas in one part heats the other part as gas The heat required for oxidation in another part realizes heat recycling and reduces energy loss. 2. Due to the adoption of the heat exchange valve group in this utility model, the ultra-low concentration coal mine gas boiler in the utility model can realize periodic reciprocating switching operation, which can effectively maintain the temperature of the ceramic heat storage material layer and satisfy the methane concentration of 2% to 3 The heat required for the oxidation of extremely low concentration coal mine gas in the ceramic heat storage material layer. 3. Since the utility model adopts the method of setting the combustion device and the convective heat exchange surface in the drum inner cavity of the boiler body, a liquid chamber is formed between the furnace wall of the boiler body and the tube wall of the drum, and the liquid chamber The liquid fully absorbs the heat of part of the high-temperature flue gas generated by the oxidation of extremely low-concentration coal mine gas with a methane concentration of 2% to 3% through the convective heat exchange surface, effectively improving the recovery and utilization rate of heat. 4. In the utility model, a refractory material layer is arranged outside the ceramic heat storage material layer, and an insulating material layer is arranged on the outer wall of the boiler body, which greatly reduces heat loss. In summary, the utility model can be widely used in coal mine gas combustion systems.
附图说明Description of drawings
图1是本实用新型的整体结构示意图；Fig. 1 is the overall structural representation of the utility model;
图2是本实用新型换向运行示意图之一；Fig. 2 is one of the schematic diagrams of the reversing operation of the utility model;
图3是本实用新型换向运行示意图之二。Fig. 3 is the second schematic diagram of the reversing operation of the utility model.
具体实施方式Detailed ways
下面结合附图和实施例对本实用新型进行详细的描述。Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.
如图1所示，本实用新型提供一种极低浓度煤矿瓦斯锅炉，其包括掺混鼓风机1、抽排瓦斯安全阀2、瓦斯掺混装置3、换向阀组、锅炉本体4、锅炉引风机5、引风机6和烟囱7。抽排瓦斯管道通过抽排瓦斯安全阀2连接瓦斯掺混装置3的瓦斯进口，掺混鼓风机1连接瓦斯掺混装置3的空气进口，瓦斯掺混装置3的出口通过换向阀组连接锅炉本体4，锅炉本体4的烟气出口连接锅炉引风机5的进风口，锅炉本体4还通过换向阀组连接引风机6的进风口。锅炉引风机5和引风机6的出风口都连接至烟囱7。As shown in Figure 1, the utility model provides an extremely low-concentration coal mine gas boiler, which includes a mixing blower 1, a gas extraction safety valve 2, a gas mixing device 3, a reversing valve group, a boiler body 4, a boiler lead Fan 5, induced draft fan 6 and chimney 7. The gas extraction pipeline is connected to the gas inlet of the gas mixing device 3 through the gas extraction safety valve 2, the mixing blower 1 is connected to the air inlet of the gas mixing device 3, and the outlet of the gas mixing device 3 is connected to the boiler body through a reversing valve group 4. The flue gas outlet of the boiler body 4 is connected to the air inlet of the boiler induced draft fan 5, and the boiler body 4 is also connected to the air intake of the induced draft fan 6 through a reversing valve group. Both the air outlets of the boiler induced draft fan 5 and the induced draft fan 6 are connected to the chimney 7 .
锅炉本体4內横向设置有一锅筒，锅炉本体4的炉壁与锅筒的管壁之间形成一液体腔室8；在锅筒的内腔一侧设置有燃烧装置，另一侧设置有对流换热面9，燃烧装置位于对流换热面9底部。燃烧装置包括带有通孔的陶瓷蓄热材料层和第一耐火材料层10，第一耐火材料层10位于陶瓷蓄热材料层的中部，将陶瓷蓄热材料层分为完全对称的第一陶瓷蓄热材料层11和第二陶瓷蓄热材料层12。在位于锅筒一端口的锅炉本体4的端面上靠近燃烧装置的部位设置有第一进出口13和第二进出口14，第一进出口13与第一陶瓷蓄热材料层11连通，第二进出口14与第二陶瓷蓄热材料层12连通。锅炉本体4的烟气出口设置在位于锅筒另一端口的锅炉本体4的端面上靠近对流换热面9的部位。A drum is arranged horizontally inside the boiler body 4, and a liquid chamber 8 is formed between the furnace wall of the boiler body 4 and the tube wall of the drum; a combustion device is arranged on one side of the inner cavity of the drum, and a convection device is installed on the other side. The heat exchange surface 9 and the combustion device are located at the bottom of the convection heat exchange surface 9 . The combustion device includes a ceramic heat storage material layer with through holes and a first refractory material layer 10, the first refractory material layer 10 is located in the middle of the ceramic heat storage material layer, and the ceramic heat storage material layer is divided into completely symmetrical first ceramic The thermal storage material layer 11 and the second ceramic thermal storage material layer 12 . A first inlet and outlet 13 and a second inlet and outlet 14 are provided on the end face of the boiler body 4 at one port of the drum near the combustion device. The first inlet and outlet 13 communicate with the first ceramic heat storage material layer 11, and the second The inlet and outlet 14 communicate with the second ceramic heat storage material layer 12 . The flue gas outlet of the boiler body 4 is arranged on the end surface of the boiler body 4 located at the other port of the drum, close to the convective heat exchange surface 9 .
换向阀组包括第一换向阀15、第二换向阀16、第三换向阀17和第四换向阀18。第一换向阀15的一端和第二换向阀16的一端并联至瓦斯掺混装置3的出口；第一换向阀15的另一端连接第三换向阀17的一端；第二换向阀16的另一端连接第四换向阀18的一端；第三换向阀17的另一端和第四换向阀18的另一端并联至引风机6的进风口。锅炉本体4的第一进出口13与第一换向阀15和第三换向阀17之间的管道连通；锅炉本体4的第二进出口14与第二换向阀16和第四换向阀18之间的管道连通。The reversing valve group includes a first reversing valve 15 , a second reversing valve 16 , a third reversing valve 17 and a fourth reversing valve 18 . One end of the first reversing valve 15 and one end of the second reversing valve 16 are connected in parallel to the outlet of the gas mixing device 3; the other end of the first reversing valve 15 is connected to one end of the third reversing valve 17; the second reversing valve The other end of the valve 16 is connected to one end of the fourth reversing valve 18; the other end of the third reversing valve 17 and the other end of the fourth reversing valve 18 are connected to the air inlet of the induced draft fan 6 in parallel. The first inlet and outlet 13 of the boiler body 4 communicate with the pipeline between the first reversing valve 15 and the third reversing valve 17; the second inlet and outlet 14 of the boiler body 4 communicate with the second reversing valve 16 and the fourth reversing valve The piping between the valves 18 communicates.
上述实施例中，在锅炉本体4底部靠近锅炉本体4的第一进出口13和第二进出口14处设置有冷水进口19，在锅炉本体4上部靠近锅炉本体4的烟气出口处设置有热水蒸汽出口20，液体通过冷水进口19进入液体腔室8内，与极低浓度煤矿瓦斯氧化放热后产生的高温烟气进行换热，换热后的液体由热水蒸汽出口20排出液体腔室8。In the above embodiment, a cold water inlet 19 is provided at the bottom of the boiler body 4 close to the first inlet and outlet 13 and the second inlet and outlet 14 of the boiler body 4, and a hot water inlet 19 is provided at the upper part of the boiler body 4 near the flue gas outlet of the boiler body 4. The water vapor outlet 20, the liquid enters the liquid chamber 8 through the cold water inlet 19, and exchanges heat with the high-temperature flue gas generated after the oxidation and heat release of the extremely low-concentration coal mine gas, and the heat-exchanged liquid is discharged from the liquid chamber through the hot water vapor outlet 20 Room 8.
上述实施例中，对流换热面9由换热管构成，对流换热面9的烟气出口与锅炉本体4的烟气出口连通。In the above embodiments, the convective heat exchange surface 9 is composed of heat exchange tubes, and the flue gas outlet of the convective heat exchange surface 9 communicates with the flue gas outlet of the boiler body 4 .
上述实施例中，在陶瓷蓄热材料层外部设置有第二耐火材料层21，以便减少陶瓷蓄热材料层的散热。In the above embodiments, the second refractory material layer 21 is arranged outside the ceramic heat storage material layer, so as to reduce the heat dissipation of the ceramic heat storage material layer.
上述实施例中，锅炉本体4的外壁设置有保温材料层22，用于减少因锅炉本体4的散热损失的热量。In the above-mentioned embodiments, the outer wall of the boiler body 4 is provided with an insulating material layer 22 for reducing heat loss due to heat dissipation of the boiler body 4 .
上述实施例中，对流换热面9的面积根据25.8m2/MW～32.2m2/MW的标准设置，较普通燃油、燃气锅炉增加20％～50％，有效地提高极低浓度煤矿瓦斯锅炉的热量回收效率。In the above embodiments, the area of the convective heat exchange surface 9 is set according to the standard of 25.8m 2 /MW to 32.2m 2 /MW, which is 20% to 50% higher than that of ordinary fuel oil and gas boilers, effectively improving the efficiency of extremely low concentration coal mine gas boilers. heat recovery efficiency.
本实用新型还提供了一种极低浓度煤矿瓦斯锅炉的运行方法，包括以下步骤：The utility model also provides a method for operating an ultra-low concentration coal mine gas boiler, which includes the following steps:
1)开启抽排瓦斯安全阀2，煤矿抽排瓦斯经过抽排瓦斯管道进入瓦斯掺混装置3，与由掺混鼓风机1提供的新鲜空气混合，形成甲烷浓度为2％～3％的极低浓度煤矿瓦斯。1) Open the gas extraction safety valve 2, the coal mine exhaust gas enters the gas blending device 3 through the gas extraction pipeline, and mixes with the fresh air provided by the blending blower 1 to form an extremely low methane concentration of 2% to 3%. Concentration coal mine gas.
2)对锅炉本体4进行预热，开启第一换向阀15和第四换向阀18，如图2所示，甲烷浓度为2％～3％的极低浓度煤矿瓦斯经过第一换向阀15从锅炉本体4的第一进出口13进入第一陶瓷蓄热材料层11，在第一陶瓷蓄热材料层11中进行氧化放热。从第一陶瓷蓄热材料层11流出的高温烟气，一部分进入第二陶瓷蓄热材料层12，对第二陶瓷蓄热材料层12进行预热后由锅炉本体4的第二进出口14经第四换向阀18、引风机6和烟囱7排出大气；另一部分进入对流换热面9的换热管中，与液体腔室8内的水进行热量交换后由锅炉本体4的烟气出口经锅炉引风机5和烟囱7排出大气。2) Preheat the boiler body 4, open the first reversing valve 15 and the fourth reversing valve 18, as shown in Fig. The valve 15 enters the first ceramic heat storage material layer 11 from the first inlet and outlet 13 of the boiler body 4 , and oxidizes and releases heat in the first ceramic heat storage material layer 11 . Part of the high-temperature flue gas flowing out from the first ceramic heat storage material layer 11 enters the second ceramic heat storage material layer 12, and after preheating the second ceramic heat storage material layer 12, it passes through the second inlet and outlet 14 of the boiler body 4. The fourth reversing valve 18, the induced draft fan 6 and the chimney 7 exhaust the atmosphere; the other part enters the heat exchange tube of the convection heat exchange surface 9, exchanges heat with the water in the liquid chamber 8, and is discharged from the flue gas outlet of the boiler body 4 The atmosphere is discharged through the boiler induced fan 5 and the chimney 7.
3)经过5分钟～120分钟后，换向阀组执行切换动作，关闭第一换向阀15和第四换向阀18，开启第二换向阀16和第三换向阀17，如图3所示，甲烷浓度为2％～3％的极低浓度煤矿瓦斯经过第二换向阀16从锅炉本体4的第二进出口14进入第二陶瓷蓄热材料层12，在第二陶瓷蓄热材料层12中进行氧化放热。从第二陶瓷蓄热材料层12流出的高温烟气，一部分进入第一陶瓷蓄热材料层11，对第一陶瓷蓄热材料层11进行预热后由锅炉本体4的第一进出口13经第三换向阀17、引风机6和烟囱7排出大气；另一部分进入对流换热面9的换热管中，与液体腔室8内的水进行热量交换后由锅炉本体4的烟气出口经锅炉引风机5和烟囱7排出大气。3) After 5 minutes to 120 minutes, the reversing valve group executes the switching action, closes the first reversing valve 15 and the fourth reversing valve 18, and opens the second reversing valve 16 and the third reversing valve 17, as shown in the figure 3, the extremely low-concentration coal mine gas with a methane concentration of 2% to 3% enters the second ceramic heat storage material layer 12 from the second inlet and outlet 14 of the boiler body 4 through the second reversing valve 16, Oxidation releases heat in the thermal material layer 12 . Part of the high-temperature flue gas flowing out from the second ceramic heat storage material layer 12 enters the first ceramic heat storage material layer 11, and after preheating the first ceramic heat storage material layer 11, it passes through the first inlet and outlet 13 of the boiler body 4. The third reversing valve 17, the induced draft fan 6 and the chimney 7 discharge the atmosphere; the other part enters the heat exchange tube of the convection heat exchange surface 9, exchanges heat with the water in the liquid chamber 8, and exits the flue gas of the boiler body 4 The atmosphere is discharged through the boiler induced fan 5 and the chimney 7.
4)经过5分钟～120分钟后，换向阀组执行切换动作，关闭第二换向阀16和第三换向阀17，开启第一换向阀15和第四换向阀18，重新进入步骤2)，极低浓度煤矿瓦斯锅炉经换向阀组执行切换动作进行周期性的往复切换运行。4) After 5 minutes to 120 minutes, the reversing valve group executes the switching action, closes the second reversing valve 16 and the third reversing valve 17, opens the first reversing valve 15 and the fourth reversing valve 18, and re-enters In step 2), the extremely low concentration coal mine gas boiler performs a switching action through the reversing valve group to perform periodic reciprocating switching operation.
上述各实施例仅用于说明本实用新型，其中各部件的结构、连接方式和制作工艺等都是可以有所变化的，凡是在本实用新型技术方案的基础上进行的等同变换和改进，均不应排除在本实用新型的保护范围之外。The above-mentioned embodiments are only used to illustrate the utility model, wherein the structure, connection mode and manufacturing process of each component can be changed to some extent, and all equivalent transformations and improvements carried out on the basis of the technical solution of the utility model are applicable. It should not be excluded from the protection scope of the present utility model.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104848233A (en) * | 2015-05-12 | 2015-08-19 | 北京矿大节能科技有限公司 | Coal-mine gas boiler with very low concentration and operation method thereof |
| CN106545876A (en) * | 2017-01-13 | 2017-03-29 | 中煤科工集团重庆研究院有限公司 | A method for heating wellbore with flue gas after gas thermal storage and oxidation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104848233A (en) * | 2015-05-12 | 2015-08-19 | 北京矿大节能科技有限公司 | Coal-mine gas boiler with very low concentration and operation method thereof |
| CN106545876A (en) * | 2017-01-13 | 2017-03-29 | 中煤科工集团重庆研究院有限公司 | A method for heating wellbore with flue gas after gas thermal storage and oxidation |
| CN106545876B (en) * | 2017-01-13 | 2019-03-19 | 中煤科工集团重庆研究院有限公司 | A method for heating wellbore with flue gas after gas regenerative oxidation |
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