Method for preparing ecological water permeable bricks with garden wastes as raw materials

Abstract

The invention relates to a method for preparing ecological water permeable bricks with garden wastes as raw materials, and belongs to the technical field of landscaping. The garden wastes are used asmain raw materials; phenolic resins are modified by biological oil generated by quick high-temperature thermal cracking of larches; and the modified phenolic resins are used for bonding with the garden wastes to prepare the ecological water permeable bricks. The method effectively solves the problems of incapability of regenerating raw materials of traditional water permeable bricks, attenuation of the water permeation performance and weak biocompatibility, and preferably solves the garbage waste burden problem generated in urban landscaping. The ecological water permeable bricks prepared by the method achieve excellent pressure resistance, water permeation resistance and wear resistance; and through adding of the biological oil, the excellent mould and corrosion resistance is achieved, and the weather resistance is improved. The ecological water permeable bricks are comfortable in foot feeling, beautiful in surface, wide in source of the raw materials, long in use period, recyclable,low in production cost and prominent in economical benefit.

Description

technical field

[0001] The invention relates to a method for preparing ecological permeable bricks by using garden wastes as raw materials, and belongs to the technical field of landscaping. Background technique

[0002] With the continuous increase of urban green area, the number of green trimmings and naturally fallen branches and leaves is also increasing. According to statistics, Beijing produces as much as 400 tons of garden waste (fresh weight) every year. Traditional treatment methods, such as burning will produce a lot of smoke and landfill will take up a lot of land and the consumption cycle will be too long. However, the organic soil fertilizer prepared by biological treatment has the disadvantages of high investment cost, long production cycle, and high price, and it is difficult to compete with low-cost chemical fertilizers. Some studies have used garden waste to produce wooden backing boards (application number CN201710429344.8), or to prepare environmentally ...

Examples

preparation example Construction

[0035] In the preparation method of the present invention, the bio-oil used is a liquid substance produced by high-temperature pyrolysis, and the preparation process is a prior art, such as the "preparation method of a pyrolysis oil urea-formaldehyde resin organic covering mat" proposed by our research group (patent The preparation method of bio-oil in application number 201711016952.2). The preparation process includes the following steps: heating the biomass material (with larch as the main raw material) at a rate of 1000-10000°C / s to a temperature of 500-650°C under anaerobic or low-oxygen conditions, with a residence time of 0.5-2s, Then quickly condense the liquid substance obtained; the liquid substance is subjected to rotary distillation at a temperature of 55° C. for 25 to 30 minutes and a pressure of 0.1 MPa to obtain larch bio-oil with a water content of 20 to 30% and a pH value of 2.5 to 3.5 .

[0036] In order to better understand the present invention, the follow...

Embodiment 1

[0038] (1) Pretreat the garden waste to obtain raw materials for the preparation of ecological permeable bricks. The operation steps of the process are as follows:

[0039] (1-1) After the landscaping waste is crushed with a pulverizer, the landscaping waste fragments with a particle size of 4 to 10 meshes are screened out;

[0040] (1-2) Drying the crushed material (1-1) obtained above to obtain raw materials for preparing ecological permeable bricks with a moisture content of 12%.

[0041] (2) prepare the modified adhesive for ecological permeable bricks, comprising the following steps:

[0042] (2-1) Take 121 parts by weight of formaldehyde solution, 35 parts by weight of sodium hydroxide solution, and 75 parts by weight of phenol solution, add them into the reaction kettle, mix and stir, and heat up to 90° C. in 15 minutes, and keep it warm for 1 hour;

[0043] (2-2) Adjust the temperature to 75°C, add 40 parts by weight of formaldehyde solution, 5 parts by weight of sodium...

Embodiment 2

[0054] (1) Pretreat the garden waste to obtain raw materials for the preparation of ecological permeable bricks. The operation steps of the process are as follows:

[0055] (1-1) After pulverizing the landscaping waste with a pulverizer, screen out landscaping waste fragments with a diameter of 4 to 10 meshes;

[0056] (1-2) Drying the crushed material (1-1) obtained above to obtain raw materials for preparing ecological permeable bricks with a moisture content of 12%.

[0057] (2) prepare the modified adhesive for ecological permeable bricks, comprising the following steps:

[0058] (2-1) Take 121 parts by weight of formaldehyde solution, 35 parts by weight of sodium hydroxide solution, and 85 parts by weight of phenol solution into the reaction kettle and stir, raise the temperature to 90° C. in 12 minutes, and keep the temperature for 1 hour;

[0059] (2-2) Adjust the temperature to 75°C, add 40 parts by weight of formaldehyde solution, 5 parts by weight of sodium hydroxid...

technical field

[0001] The invention relates to a method for preparing ecological permeable bricks by using garden wastes as raw materials, and belongs to the technical field of landscaping. Background technique

[0002] With the continuous increase of urban green area, the number of green trimmings and naturally fallen branches and leaves is also increasing. According to statistics, Beijing produces as much as 400 tons of garden waste (fresh weight) every year. Traditional treatment methods, such as burning will produce a lot of smoke and landfill will take up a lot of land and the consumption cycle will be too long. However, the organic soil fertilizer prepared by biological treatment has the disadvantages of high investment cost, long production cycle, and high price, and it is difficult to compete with low-cost chemical fertilizers. Some studies have used garden waste to produce wooden backing boards (application number CN201710429344.8), or to prepare environmentally ...

Examples

preparation example Construction

[0035] In the preparation method of the present invention, the bio-oil used is a liquid substance produced by high-temperature pyrolysis, and the preparation process is a prior art, such as the "preparation method of a pyrolysis oil urea-formaldehyde resin organic covering mat" proposed by our research group (patent The preparation method of bio-oil in application number 201711016952.2). The preparation process includes the following steps: heating the biomass material (with larch as the main raw material) at a rate of 1000-10000°C / s to a temperature of 500-650°C under anaerobic or low-oxygen conditions, with a residence time of 0.5-2s, Then quickly condense the liquid substance obtained; the liquid substance is subjected to rotary distillation at a temperature of 55° C. for 25 to 30 minutes and a pressure of 0.1 MPa to obtain larch bio-oil with a water content of 20 to 30% and a pH value of 2.5 to 3.5 .

[0036] In order to better understand the present invention, the follow...

Embodiment 1

[0038] (1) Pretreat the garden waste to obtain raw materials for the preparation of ecological permeable bricks. The operation steps of the process are as follows:

[0039] (1-1) After the landscaping waste is crushed with a pulverizer, the landscaping waste fragments with a particle size of 4 to 10 meshes are screened out;

[0040] (1-2) Drying the crushed material (1-1) obtained above to obtain raw materials for preparing ecological permeable bricks with a moisture content of 12%.

[0041] (2) prepare the modified adhesive for ecological permeable bricks, comprising the following steps:

[0042] (2-1) Take 121 parts by weight of formaldehyde solution, 35 parts by weight of sodium hydroxide solution, and 75 parts by weight of phenol solution, add them into the reaction kettle, mix and stir, and heat up to 90° C. in 15 minutes, and keep it warm for 1 hour;

[0043] (2-2) Adjust the temperature to 75°C, add 40 parts by weight of formaldehyde solution, 5 parts by weight of sodium...

Embodiment 2

[0054] (1) Pretreat the garden waste to obtain raw materials for the preparation of ecological permeable bricks. The operation steps of the process are as follows:

[0055] (1-1) After pulverizing the landscaping waste with a pulverizer, screen out landscaping waste fragments with a diameter of 4 to 10 meshes;

[0056] (1-2) Drying the crushed material (1-1) obtained above to obtain raw materials for preparing ecological permeable bricks with a moisture content of 12%.

[0057] (2) prepare the modified adhesive for ecological permeable bricks, comprising the following steps:

[0058] (2-1) Take 121 parts by weight of formaldehyde solution, 35 parts by weight of sodium hydroxide solution, and 85 parts by weight of phenol solution into the reaction kettle and stir, raise the temperature to 90° C. in 12 minutes, and keep the temperature for 1 hour;

[0059] (2-2) Adjust the temperature to 75°C, add 40 parts by weight of formaldehyde solution, 5 parts by weight of sodium hydroxid...