Process and device for burning tanning sludge by adopting fluidized bed suspended boiler

Abstract

The invention discloses a process and device for burning tanning sludge by adopting a fluidized bed suspended boiler, and relates to the technical field of environmental engineering and thermal power engineering. The device for burning tanning sludge by adopting the fluidized bed suspended boiler is in the stable gas-solid fluidized state in a fluidized bed under the effect of about 30-40 m / s high-speed air flow, severe fluidized combustion is carried out, burning in the fluidized bed is sufficient, the temperature is high, Dioxin in waste gas is discharged to the minimum, heat generated by sludge burning can be supplied to the interior of a tanning factory, the tanning sludge is effectively disposed, and meanwhile certain economic and environment-friendly benefits can be obtained.

Description

technical field [0001] The invention relates to the technical fields of environmental engineering and thermal energy engineering, in particular to a process and equipment for incinerating tanning sludge by using a fluidized bed suspension boiler. Background technique [0002] my country is the world's leather processing center and a major tanning country. The amount of leather resources and the output of leather and fur products rank first in the world. Chromium and its compounds are commonly used basic raw materials in the tanning industry. A large amount of chromium-containing wastewater and waste residues are generated during the production process. my country's tanning industry produces about 1.4 million tons of leather waste every year, most of which are discarded at will, and the heavy metal chromium contained in it has caused serious pollution to the environment. Chromium can accumulate in the human body through the food chain and pose a potential hazard to the human ...

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Problems solved by technology

[0003] Chinese patent document "A medicament for bioleaching treatment of tannery sludge" (publication number CN101891359A, published on November 24, 2011) discloses a medicament for bioleaching treatment of tannery sludge, which The material is mainly composed of ammonium sulfate, dipotassium hydrogen phosphate, magnesium sulfate heptahydrate, vitamins, trace elements, carbon source substances, etc. The bioleaching agent has excellent performance of high treatment efficiency and can effectively metabolize heavy metal accumulation substances, but its The composition is complex, the preparation cost is high, and the operation management after putting into operation also requires professionals, which is not conducive to widespread promotion

[0004] The Chinese patent document "A Technology and Equipment for Drying Tannery Sludge Using Boiler Flue Gas" (publication number CN1648080, published on August 3, 2005) discloses a method for drying tannery sludge using boiler flue gas. The technology and its equipment, this method can effectively use the boiler flue gas to dry the tannery sludge, which has the environmental protection advantage of being waste, but because the dried tannery sludge still needs to be landfilled, it violates the current The theme of "reduction" disposal of solid waste can no longer meet the current concept of solid waste disposal

The starting point of the above two methods is to turn tannery sludge into building materials, aiming to achieve double benefits of environmental protection and economic benefits. However, the preparation workshop and stock warehouse need a large area. Under the background of increasing land costs, The above two methods are difficult to carry out large-scale promotion

At the same time, considering the export of the prepared products, it is impossible to effectively and quickly solve the rapid output of tannery sludge in the factory area

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