A low-water consumption, low-discharge and fat-releasing processing method

A processing method and low-emission technology, which is applied in the field of rosin processing, can solve environmental pollution and other problems, and achieve the effects of low water consumption, low energy loss, and low noise

Active Publication Date: 2022-07-26
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A low-water consumption, low-discharge and fat-releasing processing method
  • A low-water consumption, low-discharge and fat-releasing processing method
  • A low-water consumption, low-discharge and fat-releasing processing method

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Experimental program
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Effect test

Embodiment 1

[0048] Under normal temperature conditions, the viscosity of rosin with a moisture content of 6% is greater than 10,000 mPa·s. With the increase of water content, the viscosity of rosin decreases. In industry, before conveying rosin, a certain amount of water will be added to the rosin to reduce the viscosity of rosin, so as to meet the conditions of rosin transportation, which are transported by screw conveyor and plunger pump respectively Rosin, each conveying equipment conveys rosin with different moisture content at different conveying angles, the maximum conveying distance of the conveying equipment and the water consumption per ton of rosin (that is, the water consumption of adding water to the rosin by the screw conveyor to reduce the viscosity or when the rosin is conveyed by the plunger pump. The data of pump head jacket cooling water consumption) are shown in Table 1:

[0049] Table 1. Conveying angle, conveying distance and water consumption per ton of rosin conveye...

Embodiment 2

[0053] The rosin is continuously put into the spray vertical continuous dissolver, and liquid water is not added to the rosin during the rosin dissolving process. The process of adding water, heating, gasification, boiling, stirring and melting during the rosin dissolving process is eliminated. The oil-vapor mixture is dissolved in turpentine, the dissolved oil is preheated to 130 ℃, and then mixed with high-temperature water vapor to obtain the oil-vapor mixture. The oil-vapor mixture enters tangentially from the bottom of the rosin vertical continuous dissolver, and rotates and mixes with the rosin in the dissolver. The amount of dissolved oil added is: according to the level of oil content in the raw material, adjust the oil content of turpentine after dissolving to 40%. The amount of water required to dissolve the steam consumed by the rosin, that is, the water consumption, is 0.14 t / t. The water consumption of dissolving rosin in the traditional process is more than 0.5 ...

Embodiment 3

[0055] Example 2 The heavier mechanical impurities in the rosin in the melter sink, and are discharged from the lower slag discharge port after being cooled by the water vapor in the melter and the water layer formed by the sinking in the rosin; The impurities overflow to the continuous slag removal filter outside the outlet. After slag removal and filtration, the obtained fat liquid is sent to the next process, and the waste residue is recovered. The melted oil is recovered by drying in the slag steaming equipment. The amount of melted oil used for rinsing the waste residue is 20% of the mass fraction of the waste residue. The temperature of the melted oil is 90°C, the distillation time of the waste residue is 0.5h, and the steam consumption is about 0.02 ton / ton. Pine resin.

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Abstract

The invention discloses a fat-releasing processing method with low water consumption and low discharge. It belongs to the field of water-saving processing of rosin. Including: 1) water-saving transportation: do not add water to rosin, use plunger pump to transport rosin, 2) water-saving dissolution: do not add liquid water to rosin during the process of rosin dissolving, use vertical continuous dissolver, use heat The oil-vapor mixture produced by the mixing of dissolved oil and high-temperature water vapor dissolves the rosin. 3) Water-saving washing: by using a small amount of multiple hot water washing methods, and using forced stirring to enhance the contact between the water and the fat liquid, and then standing still and stratified to discharge the water and impurities in the lower layer, separately collected in the middle-layer fat liquid tank, and the middle-layer fat liquid is placed. Add a little dissolving oil to the dissolving kettle for heating and dissolving, and separate it by a decanter centrifuge and a butterfly centrifuge to obtain a pure fat liquid. 4) Water-saving distillation: The process of turpentine distillation and separation of turpentine uses heat-conducting oil heating and vacuum distillation to distill the turpentine.

Description

technical field [0001] The invention relates to a rosin processing method, in particular to an environment-friendly rosin processing method with low water consumption and low discharge. Background technique [0002] Pine resin is a non-wood forest resource of characteristic artificial forests. There are about 13 million ha of pine forests in my country. 2 , The annual storage of rosin is nearly 20 million tons. my country is the world's largest producer of rosin, 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, and 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 shut down due to a large amount of sewage discharge and high sewage treatment costs. This is very unfavorable to the development, u...

Claims

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Application Information

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Patent Type & Authority Patents(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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