Silt ex-situ solidification treatment device and method

Abstract

The invention discloses a silt ex-situ solidification treatment device including a solidification box, a piston type mud transport pump, a mud transport pipe, a slurry transport pump, a slurry transport pipe and a solidification agent slurry storage tank; the piston type mud transport pump transports to-be-treated silt to the solidification box through the mud transport pipe; the solidification box comprises a box body, a stirring device, a mud feeding bucket, a bottom cover and a tilted leaky groove; the mud feeding bucket is arranged at the top of the box body; the inclined leaky slot is arranged at the bottom of the box body; the stirring device includes a stirring rod rolling walking groove, a stirring rod and a stirring motor; a guide line pipe and a slurry spray pipe are formed inside the stirring rod; the slurry spray pipe on the stirring rod communicates with the slurry transport pump and the solidification agent slurry storage tank through the slurry transport pipe successively. The invention also discloses a silt ex-situ solidification treatment method adopting the device; the device and the method are suitable for silt dredging for harbours and waterways, and bottom muddesilting for rivers and lake, and are applied in the fields of environmental protection and building construction to reduce the water content of silt, improve the strength of solidified soil bodies and achieve silt reduction and resource utilization.

Description

technical field [0001] The invention relates to a construction method and equipment for sludge heterogeneous solidification treatment, in particular to a sludge heterogeneous solidification treatment equipment and method, and belongs to the technical field of sludge treatment. Background technique [0002] With the introduction of sewage interception projects, about 1 billion cubic meters of dredged silt and dredged river and lake sediment are produced in China's ports and waterways every year. The treatment and disposal of bottom silt and the secondary pollution caused by it have become a common concern; for such a huge The commonly used treatment methods include chemical treatment, solidification treatment and physical treatment. Solidification and stabilization treatment has gradually become the technology favored by construction parties, design institutes and construction parties due to its high efficiency, low pollution and stable effect. Moreover, the sludge solidifica...

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Problems solved by technology

[0002] With the introduction of sewage interception projects, about 1 billion cubic meters of dredged silt and dredged river and lake sediment are produced in China's ports and waterways every year. The treatment and disposal of bottom silt and the secondary pollution caused by it have become a common concern; for such a huge The commonly used treatment methods include chemical treatment, solidification treatment and physical treatment. Solidification and stabilization treatment has gradually become the technology favored by construction parties, design institutes and construction parties due to its high efficiency, low pollution and stable effect. Moreover, the sludge solidification treatment process is generally divided into in-situ solidification treatment and ex-situ solidification treatment. In-situ solidification treatment generally adopts excavator stirring and cement mixing pile-like equipment; sludge ex-situ solidification treatment equipment such as patent ZL200420028026.9 and The disadvantages of the patent ZL201720090548.9 and the patent ZL200420028026.9 are: 1. It occupies a large area, and the production efficiency is low, the energy consumption is high, and the cost is also high; 2. The equipment needs to be fixed on the ground and cannot be moved conveniently, which limits its Scope of application; 3. The agitator is designed as a single-direction spiral blade. During the spiral conveying process, the sludge is transported in one direction, which is easy to accumulate locally and cause dead ends; the disadvantages of the patent ZL201720090548.9 are: 1. The reaction time between sludge and solidified materials Fixed, continuously pushing the feed and discharge, unable to control the uniformity of stirring; 2. The temperature in winter is low, and the reaction speed of the curing agent and the sludge slows down, resulting in insufficient reaction and affecting the strength in the later stage; In addition, these two existing patent documents discloses the structure, but does not disclose a set of continuous process operation methods

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