Method and agent for improving contamination and corrosion conditions of biomass boiler
A biomass boiler and fouling technology, which is applied in liquid chemical plating, metal material coating process, lighting and heating equipment, etc., can solve problems such as adverse effects of boilers, and achieve the effect of improving adverse effects.
Inactive Publication Date: 2017-08-18
SHANGHAI PUDONG ROAD & BRIDGE CONSTR
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a method for improving the fouling and corrosion of the biomass boiler. The method for improving the fouling and corrosion of the biomass boiler in the present invention can significantly improve the gas phase content Potassium components have adverse effects on boilers and other equipment in high temperature environments
Method used
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Embodiment 1
[0022] The method for improving fouling and corrosion of biomass boilers is implemented as follows: inject agent A into the boiler at a temperature of 900°C through a nozzle for 1 hour, collect ash samples produced after biomass fuel combustion, and mark them as A1. The gained ash sample is carried out potassium content detection, corresponding data result sees figure 1 .
Embodiment 2
[0024] The method for improving the fouling and corrosion of biomass boilers is implemented as follows: spray agent B through the nozzle at the temperature of the boiler at 900°C for 1 hour, collect the ash samples produced after the combustion of biomass fuels, and mark them as B1. The gained ash sample is carried out potassium content detection, corresponding data result sees figure 1 .
Embodiment 3
[0026] The method for improving fouling and corrosion of biomass boilers is implemented as follows: spray agent C through the nozzle at the temperature of the boiler at 900°C for 1 hour, collect the ash samples produced after the combustion of biomass fuels, and mark them as C1. The gained ash sample is carried out potassium content detection, corresponding data result sees figure 1 .
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The invention discloses a method for improving contamination and corrosion conditions of a biomass boiler. The method comprises the steps that 1, an agent is prepared, specifically, silica sol with the content of silicon dioxide being 30% and alumina sol with the content of aluminium oxide being 15% are mixed, wherein the mixing ratio is that the silicon-aluminum ratio is between 1 and 3, then a proper amount of ultrapure water is added, and the mixture is uniformly stirred so as to obtain the required agent; 2, 4-8 nozzles are uniformly arranged at the positions, with the temperature being 800-1000 DEG C, of the boiler, and the jetting range is ensured to completely cover the whole cross section of the boiler; and 3, the agent is fed into a boiler hearth by using a water pump, moisture in the agent is rapidly evaporated through a high-temperature environment in the hearth, the nanoscale silicon dioxide and the nano-scale aluminum oxide can react with gas-phase potassium in flue gas to generate a non-volatile substance with the high melting point. The invention further discloses the agent for improving the contamination and corrosion conditions of the biomass boiler. According to the method and the agent, adverse effects on equipment such as the boiler caused by a gas-phase potassium-containing component in a high-temperature environment in the combustion process of biomass fuel can be can be overcome.
Description
technical field [0001] The invention relates to a method for improving fouling and corrosion caused by gaseous alkali metals in flue gas during the operation of a biomass boiler, in particular to a method for improving fouling and corrosion of a biomass boiler. Background technique [0002] Biomass energy is the fourth largest energy after coal, oil and natural gas, and is the most competitive clean and renewable energy to replace fossil fuels. Biomass itself contains very little sulfur and nitrogen, and has the advantage of nearly zero CO2 emissions. It is estimated that the total amount of bioenergy on the earth is about 140-180 billion tons per year, which is equivalent to 10 times the current total energy consumption in the world. Our country is rich in biomass resources. At present, our country produces more than 700 million tons of crop straw every year, and the remaining 300 million tons have not been effectively utilized after being returned to the field as feed. ...
Claims
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IPC IPC(8): F23J1/00C23C18/12
CPCF23J1/00C23C18/1254
Inventor 施曙东闫国杰罗芳艳刘钢李军代张健涂圣康邱轶许严邓国民姚凯陈韬
Owner SHANGHAI PUDONG ROAD & BRIDGE CONSTR