Hot blast stove is a kind of industrial hot blast stove which heates water in hot blast stove and outputs hot steam through fuel combustion. With the successive implementation of national energy saving and emission reduction policies, vigorous energy saving campaigns have been carried out in all walks of life. As an energy user, improving the thermal efficiency of hot blast stove can not only reduce combustion. The amount of material used can save costs for enterprises and reduce pollution. Zheng Guo, an engineer with unique experience in manufacturing and R&D of industrial hot stoves in China, points out that improving the thermal efficiency of hot stoves can start from the following aspects: 合理改造换热面：
Reasonable modification of heat exchange surface:
1. Removal of the arch of the original furnace for the horizontal hot blast stove, and transformation of the coal-fired furnace bed with insulation layer and refractory bricks into a secondary radiation surface. The vertical hot blast stove can build radiation heap at the bottom of the furnace and install radiation arch at the top of the furnace gallbladder.
2、控制炉膛与烟道的漏风量。对成都收账公司的观火孔进行密封, 对热风炉的风道和烟道进行密封改造, 特别是砖砌风道和烟道漏风量较大时, 改烧燃气后, 必须进行密封处理, ****改为金属烟道。当多台热风炉共用一台总烟道时, 每台热风炉的分烟道上应设隔断装置, 防止烟气及吹扫过程中的残留煤气流入停止运行的热风炉炉膛中去。
2. Control the air leakage of furnace and flue. Sealing the observation holes of hot blast stove, sealing the air duct and flue duct of hot blast stove, especially when the air leakage of brick air duct and flue duct is large, after burning gas, sealing treatment must be carried out, and ** should be changed to metal flue duct. When multiple hot blast stoves share a total flue, a partition device should be installed in the distributor of each hot blast stove to prevent the flue gas and residual gas from flowing into the stoppage hot blast stove hearth.
Reasonable selection of burners:
1、在额定供气压力下, 燃烧器的热负荷必须满足热风炉的要求。燃烧完全, 过剩空气系数低, 燃烧温度高,燃烧噪音小, 炉膛火焰充满度好, 火焰辐射能力强。
1. Under the rated supply pressure, the heat load of the burner must meet the requirements of the hot blast stove. Full combustion, low excess air coefficient, high combustion temperature, low combustion noise, good furnace flame filling, strong flame radiation capacity.
2. Load regulation ratio meets the requirements of hot blast stove operation and can adjust excess air coefficient.
3. It can realize the self-control project stipulated in the regulations of hot blast stove Safety Technical Supervision issued by the Ministry of Labor.
1、合理利用热风炉保温及烟气余热。对没有保温措施的热风炉进行保温, 使热风炉表面温度不超过50 ℃~ 60 ℃, 使热风炉表面的热损失在3% 以内。对保温效果不好的热风炉重新保温。由于改烧燃气后烟气中没有灰尘, 可以改用换热效率高的省煤器, 充分利用烟气的余热。
1. Reasonable utilization of heat preservation of hot blast stove and waste heat of flue gas. The hot blast stove without thermal insulation measures is insulated so that the surface temperature of the hot blast stove does not exceed 50 60 and the heat loss on the surface of the hot blast stove is less than 3%. Re-heat preservation of hot blast stove with poor heat preservation effect. Since there is no dust in the flue gas after burning the gas, the economizer with high heat transfer efficiency can be used to make full use of the waste heat of the flue gas.
2、增加对流换热量。首先要清除炉筒、联箱及其他受热面的水垢和灰渣层。对水管热风炉, 增设挡烟板, 增加烟气流程和烟气冲刷面积, 提高烟气流速, 对火管热风炉, 可在烟火管内安装麻花状旋流片或螺旋金属丝, 增加烟气的流速和边界层的扰动, 提高对流换热系数。
2. Increase convective heat transfer. First of all, the scale and ash layer on the hearth, header and other heating surfaces should be removed. For water pipe hot blast stove, add smoke shield, increase flue gas flow and flue gas scour area, increase flue gas flow rate. For fire pipe hot blast stove, twist swirl sheet or spiral wire can be installed in the fire pipe, increase flue gas flow rate and boundary layer disturbance, and improve convective heat transfer coefficient.
标签:   热风炉 环氧地坪 地坪 环氧地坪漆 环氧地坪施工