Method for preparing white snow-melting agent by using pyroligneous liquor and application thereof

Abstract

The invention discloses a white snow-melting agent prepared by using pyroligneous liquor and a method for preparing white snow-melting agent by using pyroligneous liquor. The method comprises the following steps: distilling pyroligneous liquor under the conditions of a pressure of 0.01+ / -0.005 MPa and a temperature of 68+ / -2 DEG C to obtain a colorless pyroligneous liquor; making the distilled pyroligneous liquor, calcium carbonate and basic magnesium carbonate react for 50-60 min at a temperature of 30-35 DEG C according to a ratio of (4-6):1:1 mol to prepare a colorless CMA (Calcium Magnesium Acetate) liquid snow-melting agent liquid; spraying and drying the colorless CMA liquid snow-melting agent liquid to obtain a CMA white solid snow-melting agent. The snow-melting agent is applied to accumulated snow with excellent effect. The CMA type environment-friendly snow-melting agent is prepared from a biomass effluent, an environment-friendly type snow-melting agent which is low in cost and free from chlorine damage can be provided for road deicing and snow-melting, and the CMA is a good corrosion remover and plays a role in protecting facilities such as roads, bridge facilities, and concrete members. The pyroligneous liquor is from one of byproducts from pyrolysis of the biomass waste through destructive distillation, and is a main energy of a sustainable development energy system.

Description

Technical field [0001] The invention belongs to snow removal technology, and particularly relates to a method and application of a white snow melting agent prepared from wood vinegar liquid. Background technique [0002] The traditional method of melting snow and deicing in winter in large and medium cities in my country is to use salt water. Although salt water is harmless to asphalt pavement, there are many insurmountable defects in other aspects: such as corrosion damage to roads, bridge facilities and concrete components, "salt damage" to flowers, trees, and even crops, and pollution after it flows into rivers and lakes. If water seeps into groundwater, drinking this water will cause great harm to human health and so on. [0003] In order to ensure the ecological environment and roads and other facilities, the United States, Canada, and Northern Europe are actively researching environmentally friendly snow melting agents. Calcium magnesium acetate (CMA) is an environmentally ...

AI Technical Summary

Problems solved by technology

[0007] According to the existing problems, we conducted research and experiments, and proposed a process method of rectification first and then reaction conversion. First, biomass waste (wheat straw, wild jujube core, wood chips, etc.) was used to dry distillation pyrolysis charcoal and fuel gas The black-brown waste liquid produced in the waste water—wood vinegar (the current index of wood vinegar is: acetic acid content is 6-12%, propionic acid 0.6%, formic acid 0.3%, pH=2.5), as a low-cost source of acetic acid, The near-white and low-cost CMA environment-friendly deicing agent has been prepared. The method is simple and feasible, and overcomes the defects that the CMA environmental-friendly deicing agent cannot be widely used due to the high price of acetic acid and color.