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Low-water-consumption and low-emission turpentine processing method

A processing method and low-emission technology, applied in the field of rosin processing, can solve problems such as pollution of the environment, and achieve the effects of low water consumption, low noise and high safety

Active Publication Date: 2020-12-15
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the current rosin processing technology, the water consumption of rosin processing reaches an astonishing 1.9 tons / ton. Even if the 0.7-0.8 tons / ton oily wastewater produced in the distillation process is fully recycled, the water consumption for processing 1 ton of rosin is also more than 1.2 tons. , the consumed water eventually becomes oily wastewater, which pollutes the environment

Method used

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  • Low-water-consumption and low-emission turpentine processing method
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  • Low-water-consumption and low-emission turpentine processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Under normal temperature conditions, the viscosity of pine resin with a moisture content of 6% is greater than 10000mPa·s. As the water content increases, the viscosity of turpentine decreases. In industry, before transporting turpentine, a certain amount of water will be added to turpentine to reduce the viscosity of turpentine, so as to meet the conditions of turpentine transportation. Rosin, each conveying equipment conveys rosin with different moisture content under different conveying angles, the maximum conveying distance of the conveying equipment and the water consumption per ton of rosin (that is, the amount of water consumed by adding water to the rosin conveyed by the screw conveyor to reduce the viscosity or when the plunger pump conveys the rosin The data of pump head jacket cooling water consumption) are shown in Table 1:

[0049] Table 1 The conveying angle, conveying distance and conveying water consumption per ton of rosin conveyed by screw conveyor and...

Embodiment 2

[0053] The rosin is continuously put into the spray-rotary vertical continuous dissolver, and liquid water is not added to the rosin during the rosin dissolving process, eliminating the process of adding water, heating, vaporizing, boiling, stirring and melting during the rosin melting process, and adopting the mixture of hot-dissolved oil and high-temperature steam to produce The oil-steam mixture is used to dissolve the pine resin, and the dissolved oil is preheated to 130°C, and then mixed with high-temperature steam to obtain the oil-steam mixture. The oil-vapor mixture enters tangentially from the bottom of the pine resin vertical continuous dissolver, and rotates and mixes with the turpentine in the dissolver. The oil-vapor fully stirs the pine resin to achieve the purpose of rapid dissolution. The amount of dissolved oil added is: according to the height of the oil content in the raw material, the turpentine oil content after the adjustment is dissolved is 40%. The amou...

Embodiment 3

[0055] Embodiment 2 The heavier mechanical impurities in the rosin in the melter sink, and are discharged from the lower slag outlet after being washed by the water layer formed by cooling the water vapor in the melter and sinking in the rosin; the melted fat liquid and light Impurities overflow to the continuous slag removal filter outside the outlet. After slag removal and filtration, the fat liquid is sent to the next process, and the waste residue is recovered. The turpentine in the waste residue is recovered by rinsing with hot melt oil under stirring conditions, and the waste residue is in the In the slag steaming equipment, the molten oil is recovered by drying and steaming. The amount of molten oil used for rinsing the waste residue is 20% of the mass fraction of the waste residue. The temperature of the molten oil is 90°C. The distillation time of the waste residue is 0.5h, and the steam consumption is about 0.02 tons / ton Pine resin.

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Abstract

The invention discloses a method for processing rosin with low water consumption and low emission. The invention belongs to the field of water-saving processing of turpentine. The method comprises thefollowing steps: 1) water-saving conveying: not adding water into turpentine, and conveying the turpentine by adopting a plunger pump; 2) water-saving dissolving: not adding liquid water into the turpentine in the turpentine dissolving process, and dissolving the turpentine by adopting an oil-steam mixture generated by mixing hot dissolved oil and high-temperature steam by using a vertical continuous dissolver; 3) water-saving washing: enhancing the contact between water and the grease liquid by adopting a small amount of repeated hot water washing mode and forced stirring, then standing forlayering to discharge water and impurities at the lower layer, separately collecting to a middle-layer grease liquid tank, putting middle-layer grease liquid into a dissolving kettle, adding a small amount of dissolved oil, heating for dissolving, and separating by a horizontal screw centrifuge and a butterfly centrifuge to obtain pure lipid liquids; and 4) water-saving distillation: distilling the turpentine by adopting a conduction oil heating and reduced pressure distillation process in a turpentine distillation and separation process.

Description

technical field [0001] The invention relates to a method for processing rosin, in particular to an environment-friendly rosin processing method with low water consumption and low discharge. Background technique [0002] Pine resin is a characteristic plantation non-wood forest resource. There are about 13 million hm of pine forests in my country 2 , The annual reserve of turpentine is nearly 20 million tons. my country is the world's largest producer of turpentine, with the highest annual output of nearly 1 million tons. However, my country is not yet a strong country in rosin processing and utilization technology. The rosin processing industry generally has environmental problems such as high water consumption and large sewage discharge. Strict requirements were put forward, resulting in many turpentine processing enterprises being forced to close down due to large amounts of sewage discharge and high sewage treatment costs. This is very unfavorable to the abundant turpent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/02C09F3/00
CPCC09F1/02C09F3/00
Inventor 陈玉湘徐士超赵振东王婧卢言菊毕良武古研
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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