Method for treating combusted slag by titanium white by-product ferrous sulfate and titanium white waste acid

A process for treating the ash dregs of incinerator with the waste acid and ferrous sulfate as by-product, which are generated in preparing titanium oxide by sulfuric acid method, includes such stepsas proportionally introducing said waste acid and FeSO4 to the ash dregs pit of incinerator, anaerobic stirring for 0.5-1 hr to immobilize Cr, oxidizing the ash dregs for 1-5 hr in intermediate pit, and controlling pH value to 9-11 for stabilizing heavy metals. Its advantages are simple process, low cost and utilizing waste to treat waste.

City house refuse treatment method

生活垃圾焚烧炉燃烧过程控制方法

The present invention relates to a combustion process control method for urban domestic refuse incinerator. Based on the fuzzy control mode said invention can automatically control input quantity, and can output the speech variable quantity to execution mechanism to make refuse incinerator control. The furnace cavity temp. of refuse incinerator, furnace temp. variable rate and flue gas air preheater air pressure variable signal are inputted into the basic fuzzy controller, then the fuzzy controller can outupt the various speech variable quantities of material-adding working time of material-feeding device, material-adding internal time, air blower bafflw position, primary air baffle position and flue gas air preheater by-pass baffle position to control refuse incinerator.

钛白废酸及钛白副产品硫酸亚铁处理焚烧灰渣的方法

... 本发明是一种利用硫酸法钛白废酸及副产品硫酸亚铁处理焚烧灰渣的方法。现有技术中，焚烧灰渣多为填埋处理，而钛白废酸及副产品硫酸亚铁尚无安全可靠出路，这两种废料各自的处理都存在着成本高，处理难度大等不足。本发明利用钛白废酸及副产品硫酸亚铁溶液作为焚烧炉出渣水，即将钛白废酸及副产品硫酸亚铁溶液按20～135g FeSO#-[4]/kg干灰渣的比例引入焚烧炉出渣坑处理灰渣，并利用灰渣的碱性中和钛白废酸及硫酸亚铁的酸性，在出渣坑中经过0.5～1小时的厌氧搅动阶段稳定铬后，灰渣排入中转渣坑与空气接触氧化1～5小时，氧化结束时控制渣的滤液的pH值在9～11范围以使灰渣中的重金属在氧化过程中被稳定化。本发明工艺简单、容易实施，以废治废，有效降低了治废、排废成本，减少了焚烧灰渣和硫酸法钛白废酸副产品给环境带来的污染。 ...

House refuse treatment method for city

The municipal house refuse treatment method includes the following steps: zoning nunicipal refuse and stacking it in storage pool, stirring, natural fermentation for 4-6 days; spraying fermented diffusate into furnace to make high-temp. pyrolysis; and decomposing the harmful gas escaped by fermentation into odourless gas; incinerating the fermented refuse in refuse incinerator, separating solid furnace slag by magnetic method to remove iron, then sieving for application; and utilizing the high temp. flue gas produced by refuse incineration to heat the water being in the furnace to produce saturated steam or superheated steam which can be supplied for steam turbo-unit to generate power or heating for external system. Said invention does no pollute environment, can produce heat energy and possesses good treatment effect.