Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing greening substrate by using wood chips and straw

A technology of straw and wood chips, applied in the production field of greening substrates, can solve the problems of slow release of harmful substances, unsuitable for industrial production, increase production cost, etc., and achieve the effects of good effect, strong water and fertilizer retention capacity, and cost saving.

Inactive Publication Date: 2019-08-06
YANGZHOU ZHONGTIANLI NEW MATERIAL
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent document CN106316503A discloses a method of making soil matrix for garden flowers from sludge, which uses sludge, sawdust, stone powder and nitric acid to mix and dry and shape, and uses the strong acidity and strong oxidative properties of nitric acid to kill the Harmful bacteria and pathogens need to add stone powder to react with nitric acid to adjust the pH value of the mixture. The addition of stone powder will affect the growth of flowers. Do not add too much stone powder. Adding nitric acid to the system will increase the cost and is not suitable for industrial production.
[0007] Although the above two methods utilize urban sludge, many additives are used in the production process of forming greening substrates, which not only increases the production cost, but also brings about the slow release of harmful pollutants into the water body during the production process and use process. substance hazard

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Take the dried sawdust and crush it into a diameter of less than 35mm with a crusher. The corn stalks are taken and pulverized into a size smaller than 35mm in diameter by using a pulverizer. spare.

[0023] 2. The domestic sludge comes from a sewage treatment plant in Qingdao, and the solid content of the domestic sludge is 15%.

[0024] The high-pressure sludge filter press is used to dehydrate the domestic sludge, and the solid content of the dehydrated sludge reaches 68%.

[0025] 3. Adhesive: any one of urea-formaldehyde resin, epoxy resin and amino resin.

[0026] 4. Add sawdust, straw, and sludge into the mixing tank. The input amount is: 2100kg of sawdust, 450kg of domestic sludge, and 250kg of straw.

[0027] After stirring for 2 hours, mix well, then add 200kg of binder into the mixing tank, and continue stirring for 30 minutes to obtain 3000 kg of mixed material.

[0028] 5. Send the mixed material into the molding machine for molding, and shape it int...

Embodiment 2

[0033] 1. Take the sun-dried sawdust and grind it into a diameter of less than 30mm with a grinder. Take the corn stalks and grind it with a grinder into a diameter of less than 30mm for later use.

[0034] 2. The domestic sludge comes from a sewage treatment plant in Qingdao, and the solid content of the domestic sludge is 12%.

[0035] A special sludge filter press is used to dehydrate the sludge, and the solid content of the dehydrated domestic sludge reaches 70%.

[0036] 3. Adhesive: any one of urea-formaldehyde resin, epoxy resin and amino resin.

[0037] 4. Add sawdust, straw, and domestic sludge into the mixing tank. The feeding amount is: 1800kg of sawdust, 600kg of domestic sludge, and 350kg of straw.

[0038] Stir the sawdust, domestic sludge and straw for 2.5 hours, mix well, then add 250 kg of binder, and continue stirring for 30 minutes to obtain 3000 kg of mixed materials.

[0039] 5. Send the mixed material to the extrusion machine for extruding, the size of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Diameter sizeaaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for producing a greening substrate by using wood chips and straw, relates to the technical field of production of greening substrates, and also relates to the technology of reuse of wood chips and straw. Crushed wood chips and straw and an adhesive are mixed to obtain a mixture. The mixture is extruded to obtain a formed sheet. Then, the formed sheet is dried by microwave to obtain the sterilized greening substrate. The method has the advantages of easily available raw materials, low price, low cost and no pollution, realizes the reuse of the wood chips, the straw and sludge, and also has the advantages of simple production process, good product stability, nutrient balance and strong water retention and fertilizer conservation capability.

Description

technical field [0001] The invention relates to the technical field of greening substrate production, and also relates to the recycling technology of sawdust and straw. Background technique [0002] Sawdust is a cheap material with low density and easy molding. It can be used as the residual waste of wood processing, which can be reprocessed to make boards. It can be used as fuel, feed, and fertilizer. It improves the fertility of the substrate and has a high water retention capacity. As a kind of organic waste, straw can be fermented into organic fertilizer after crushing and a series of processing, which can be directly used as organic fertilizer for crops. Wood chips and straws can be used as plant growth substrates after being dried, crushed, shaped and sterilized. [0003] The discharge of domestic sludge is increasing year by year with the improvement of the quality of life of residents. These sludges are the inevitable products of sewage treatment plants and sewage ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B27N3/02B27N3/00B27N3/28
CPCB27N3/007B27N3/02B27N3/28
Inventor 吴宗斌
Owner YANGZHOU ZHONGTIANLI NEW MATERIAL