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Dust suppressant as well as preparation method and application thereof

A dust suppressant and reaction technology, applied in the field of dust suppressant and its preparation, can solve the problems of easy cracking of the road surface, secondary dust on the road surface, and high cost, and achieve a low impact on the road environment, realize reuse and low use cost. Effect

Active Publication Date: 2019-12-20
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dry hard concrete pavement and paved asphalt pavement have the disadvantages of dusty weather in dry weather, easy cracking of the road surface, and relatively troublesome maintenance. At the same time, a large number of vehicles are likely to cause secondary dust on the road surface, which seriously affects the urban atmospheric environment.
[0003] At present, the dust problem caused by paving asphalt roads and dry hard concrete roads is generally solved by sprinkler watering, but the water evaporates quickly, and it needs to be sprayed 5 to 7 times a day in sunny and hot weather, which is costly and wastes water resources.
On the basis of sprinkling water to suppress dust, in recent years, hygroscopic chemical dust suppressants made by adding halogen inorganic salts to water and super absorbent dust suppressants made of water-absorbing resin sols are also found in urban road dust suppression, but There are still problems such as poor environmental friendliness, damage to road surfaces, and high cost

Method used

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  • Dust suppressant as well as preparation method and application thereof
  • Dust suppressant as well as preparation method and application thereof
  • Dust suppressant as well as preparation method and application thereof

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preparation example Construction

[0020] The invention provides a kind of preparation method of dust suppressant, comprises the following steps:

[0021] Mix cellulase, water and straw, carry out enzymolysis reaction, add thickener or adhesive to obtain dust suppressant.

[0022] In the present invention, unless otherwise specified, the raw materials used are commercially available products well known in the art.

[0023] In the present invention, the cellulase preferably includes xylanase, acid cellulase, cellobiase and β-glucanase; the xylanase, acid cellulase, cellobiase The mass ratio to β-glucanase is preferably (1-4):(1-4):(1-4):(1-2), more preferably 3:3:3:1. In the present invention, the straw is preferably corn straw or sorghum straw; the particle size of the straw is preferably 1-2mm. In the present invention, the mass ratio of the cellulase, water and straw is preferably (0.01-2):(280-340):(5-10).

[0024] Before the mixing, the present invention preferably heats the water to 45-55° C., and adjus...

Embodiment 1

[0036] ①Crush the corn stalks with a pulverizer, the particle size of which is 1-2 mm, and set aside;

[0037] ② Mixing xylanase, acid cellulase, cellobiase and β-glucanase according to the mass ratio to prepare a compound enzyme, the mass ratio of the above four enzymes is 1:1:2:2;

[0038] ③ Use dilute hydrochloric acid and a pH meter to adjust the pH of 300 ml of water to 6.0, heat up to 50°C and keep it at a constant temperature;

[0039] ④Add 0.9g of the compound enzyme in ② into the water in ③ to activate. The activation time is 6 minutes to obtain an activated enzyme solution. During activation, stir to accelerate the dispersion and activation of the four enzymes;

[0040] ⑤Take 6g of ① crushed straw and put it into the above-mentioned activated enzyme solution, start the enzymatic hydrolysis reaction, the reaction time is 60min, then stop heating, add 0.3g of polyvinyl alcohol, ultrasonically stir the whole process, continue to stir for 20min after adding polyvinyl alc...

Embodiment 2

[0044] ①Crush the corn stalks with a pulverizer, the particle size of which is 1-2 mm, and set aside;

[0045] ② Mixing xylanase, acid cellulase, cellobiase and β-glucanase according to the mass ratio to prepare a compound enzyme, the mass ratio of the above four enzymes is 1:1:1:1;

[0046] ③ Use dilute hydrochloric acid and a pH meter to adjust the pH of 300 ml of water to 6.0, heat the water to 50°C and keep it at a constant temperature;

[0047] ④Add 0.9g of the compound enzyme in ② into the water in ③ to activate it. The activation time is 6 minutes to obtain an activated enzyme liquid. When the enzyme is activated, stir to accelerate the dispersion and activation of the four enzymes;

[0048] ⑤Take 6g of ① crushed straw and put it into the above-mentioned activated enzyme solution, start the enzymatic hydrolysis reaction, the reaction time is 60min, then stop heating, add 0.3g of polyvinyl alcohol, ultrasonically stir the whole process, continue to stir for 20min after a...

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Abstract

The invention provides a dust suppressant as well as a preparation method and application thereof, and belongs to the field of road dust suppression. The preparation method of the dust suppressant comprises the following steps: mixing cellulase, water and straw, carrying out an enzymolysis reaction, and adding a thickener or an adhesive to obtain the dust suppressant. Straw is used as a raw material and is degraded through cellulase, and macromolecular saccharides such as xylan and cellulose are degraded into low-molecular saccharides; low-molecular carbohydrates are dissolved in a supernatantliquid, water evaporates is achieved after spraying, a soft mucous membrane layer is formed on the road surface due to residual carbohydrates, and the moisture absorption capacity can be kept for a long time, so that the road surface is kept in a relatively humid environment, and flying dust is inhibited; meanwhile, the formed soft mucous membrane layer can be well combined with the road surface;by adding the thickener or the adhesive, the viscosity of the dust suppressant can be improved, flying dust on the road surface can be effectively adhered, and thus the dust suppression effect is enhanced; in addition, the soft mucous membrane layer is not easy to dry to form a shell, so that the anti-rolling effect is better.

Description

technical field [0001] The invention relates to the technical field of road dust suppression, in particular to a dust suppressant and its preparation method and application. Background technique [0002] According to the actual application scenarios, roads mainly include crushed stone pavement, dry hard concrete pavement and paved asphalt pavement. Dry hard concrete pavement and paved asphalt pavement have the disadvantages of dusty weather in dry weather, easy cracking of the road surface, and relatively troublesome maintenance. At the same time, a large number of vehicles are likely to cause secondary dust on the road surface, which seriously affects the urban atmospheric environment. [0003] At present, the dust problem caused by paving asphalt roads and dry hard concrete roads is generally solved by sprinkler watering, but the water evaporates quickly, and it needs to be sprayed 5 to 7 times a day in sunny and hot weather, which is costly and wastes water resources. . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/22C12P19/02C12P19/12C12P19/14
CPCC09K3/22C12P19/14C12P19/12C12P19/02
Inventor 梁文俊池浩任思达李坚
Owner BEIJING UNIV OF TECH
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