CN-122012143-A - Production equipment and method for extracting montan wax from lignite

CN122012143ACN 122012143 ACN122012143 ACN 122012143ACN-122012143-A

Abstract

The invention relates to production equipment for extracting montan wax from lignite, which comprises an extractor, wherein the extractor comprises an extraction tank, the extraction tank is divided into a plurality of extraction chambers, drag chain groups are respectively arranged in the extraction chambers, each drag chain group comprises a first drag chain segment, a soaking segment and a second drag chain segment, a separation plate is arranged at the bottom of the extraction tank and arranged below the drag chain groups of the extraction chambers, through holes which are vertically communicated are formed in the separation plate, a first storage tank and a second storage tank are arranged at the bottom of the extraction tank and are arranged below the separation plate, the first drag chain segment is correspondingly provided with a first spraying device, the first storage tank is correspondingly arranged below the first drag chain segment, the second drag chain segment is correspondingly provided with a second spraying device, the second spraying device is used for being communicated with a solvent inlet, the second storage tank is arranged below the second drag chain segment, the soaking segment is soaked in the second storage tank, countercurrent contact between an extractant and lignite particles is realized, and the lignite particles are fully extracted.

Inventors

YAN ZIPENG
CHEN SHAN
GAO SHANBAO

Assignees

河南华泰粮油机械股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260411

Claims (8)

1. A production device for extracting montan wax from lignite is characterized by comprising The extractor comprises a feed inlet, a discharge outlet, a liquid outlet and a solvent inlet, wherein the feed inlet is used for allowing lignite particles to enter the extractor for extraction, extracted lignite residues are discharged from the discharge outlet, and extract liquid is discharged from the liquid outlet; The desolventizing device is used for communicating with a discharge port of the extractor so as to dry and desolventize the extracted lignite residues; The solid-liquid separator comprises an extraction liquid inlet, a filter residue outlet and a filter liquid outlet, the extraction liquid inlet is communicated with a liquid outlet of the extractor, separated coal dust is discharged from the filter residue outlet, and filter liquid is discharged from the filter liquid outlet; The evaporator is used for being communicated with a filtrate outlet of the solid-liquid separator so as to increase the concentration of montan wax and resin in the filtrate; The crystallizer is communicated with the evaporator so as to crystallize and separate out montan wax in the filtrate; A centrifuge in communication with the crystallizer for separating the crystallized montan wax from the resin solvent mixture; The evaporation concentrator is communicated with the centrifugal machine to evaporate the solvent in the resin solvent mixed solution to obtain concentrated resin; The extractor comprises an extraction tank, the extension direction of the extraction tank is defined as the front-back direction, a plurality of partition boards are fixed in the extraction tank at intervals along the front-back direction, the partition boards divide the extraction tank into a plurality of extraction chambers, and a drag chain group for dragging lignite is respectively arranged in each extraction chamber; the drag chain group comprises a first drag chain segment, a soaking segment and a second drag chain segment, wherein the first drag chain segment is communicated with a feed inlet of the extractor, and the second drag chain segment is communicated with a discharge outlet of the extractor; the bottom of the extraction tank is provided with a separation plate which is arranged below the drag chain group of each extraction chamber, and the separation plate is provided with a through hole which runs through from top to bottom; The bottom of the extraction tank is provided with a first storage tank and a second storage tank, the first storage tank and the second storage tank are arranged below the isolation plate, the first drag chain section is correspondingly provided with a first spraying device, and the first storage tank is correspondingly arranged below the first drag chain section so as to collect the extraction liquid after the first spraying device sprays solvent and lignite of the first drag chain section is extracted; The second spraying device is correspondingly arranged on the second drag chain section and is used for being communicated with the solvent inlet, the second storage tank is arranged below the second drag chain section so as to collect the extraction liquid after the second spraying device sprays the solvent and lignite of the second drag chain section is extracted, the soaking section is soaked in the second storage tank, and the extraction liquid level in the second storage tank is positioned below the upper surface of the soaking section; the first spraying device is communicated with the second storage tank, and the liquid outlet is communicated with the first storage tank.
2. The production equipment for extracting montan wax from lignite according to claim 1, wherein the extraction tank comprises a first extraction tank and a second extraction tank which are arranged at left and right intervals, a discharge bin is arranged between the first extraction tank and the second extraction tank, a conveying structure is arranged in the discharge bin, and the discharge port is communicated with the discharge bin; And discharging the lignite slag extracted by the first extraction tank and the second extraction tank to a discharge bin and discharging the lignite slag from a discharge hole through a conveying structure.
3. The production equipment for extracting montan wax from lignite according to claim 2, wherein the drag chain group comprises a connecting section for connecting a first drag chain segment and a second drag chain segment, and the first drag chain segment, the soaking section, the second drag chain segment and the connecting section are connected end to form a closed loop.
4. A production facility for extracting montan wax from lignite according to claim 3, wherein the cross section of the extraction tank is inverted trapezoid, and the drag chain group is inverted trapezoid; The first drag chain segment in the first extraction tank is an inclined segment which is obliquely arranged from top to bottom and from left to right, the soaking segment in the first extraction tank is horizontally arranged, the second drag chain segment in the first extraction tank is an inclined segment which is obliquely arranged from top to bottom and from right to left, the first drag chain segment in the second extraction tank is an inclined segment which is obliquely arranged from top to bottom and from right to left, the soaking segment in the second extraction tank is horizontally arranged, and the second drag chain segment in the second extraction tank is an inclined segment which is obliquely arranged from top to bottom and from right to left.
5. The production equipment for extracting montan wax from lignite according to claim 4, wherein the solvent inlet is respectively communicated with the second spraying device of the first extraction tank and the second spraying device in the second extraction tank.
6. The production equipment for extracting montan wax from lignite, according to claim 5, is characterized in that a first spraying section in the first extraction tank is obliquely arranged from top to bottom and from left to right, a second spraying section in the first extraction tank is obliquely arranged from top to bottom and from right to left, a first spraying section in the second extraction tank is obliquely arranged from top to bottom and from right to left, and a second spraying section in the second extraction tank is obliquely arranged from top to bottom and from left to right.
7. The production method of a production facility for extracting montan wax from lignite according to any one of claims 1-6, characterized by comprising the steps of: s1, crushing and screening, namely crushing and screening lignite; s2-drying, namely drying the lignite; S3, continuous leaching, namely conveying lignite particles to an extractor, adding an organic solvent from a solvent inlet, carrying out countercurrent extraction on the organic solvent in an extraction chamber, discharging extracted lignite residues from a discharge hole, and discharging an extract from a liquid outlet; s4, desolventizing the extracted lignite slag, namely, drying and desolventizing the lignite slag in a desolventizer to evaporate and remove the solvent in the lignite slag from the lignite slag; s5, solid-liquid separation, namely, the extract enters a solid-liquid separator, the pulverized coal in the extract is filtered and then is discharged from a filter residue outlet, and the filtrate is discharged from a filtrate outlet; S6, concentrating and crystallizing the filtered extract to separate out the montan wax from the extract, and separating the montan wax from the resin through a centrifugal machine; And S7, concentrating the resin, namely evaporating the resin solvent mixed solution from which the montan wax is separated, and evaporating the solvent in the resin solvent mixed solution to obtain the concentrated resin.
8. The method for extracting montan wax from lignite according to claim 7, wherein in S7, the solvent evaporated from the resin solvent mixture is condensed and recovered, and then enters a water diversion system to separate the solvent and store the solvent in a solvent storage tank.

Description

Production equipment and method for extracting montan wax from lignite Technical Field The invention belongs to the technical field of montan wax production, and particularly relates to production equipment and method for extracting montan wax from lignite. Background The montan wax has wide application, can be used for producing special cosmetics such as lipstick, hair spray and the like in daily chemical industry, has medium and high grade Wen Lamo in precision casting industry, is favorable for improving the precision and surface finish of castings, is used as lubricant and release agent in processing engineering plastics such as PVC and the like, improves the processing performance, and is used as an insulating material for wires and cables in electric industry to provide waterproof, moistureproof and insulating protection. The main raw material of the montan wax is montan. The global lignite resources are abundant, the geological reserves are about 4 trillion tons, and at the end of the 19 th century, german scientists and engineers (such as Franz Karl Lv Tege) first developed an industrial production process for continuous countercurrent extraction with benzene or toluene. Montan wax is not a simple "substitute" but a unique carrier of properties that are difficult to reach with a range of synthetic waxes and most natural waxes. It has high melting point (80-90 ℃) and high hardness, excellent moisture resistance, insulation and cohesiveness, and good luster and emulsifying property, the material is used as a non-replaceable or preferential raw material in specific fields such as precision casting (lost wax casting), coating, duplicating paper, cable insulation, lubricant, cosmetics and the like. In the extraction process of montan wax, a drag chain type extractor is widely used as core equipment at present. The working principle of the extractor is based on a multi-stage solvent spraying mode that a coal bed to be extracted is continuously paved on a drag chain which moves circularly, and the solvent is sprayed to the surface of the coal bed in a grading way through an upper spraying system. Under the action of gravity, the solvent permeates from top to bottom and flows through the coal seam, and then is collected into a solvent collecting box below, so that primary contact extraction is completed. However, this design has inherent limitations-the contact time of the coal with the solvent is entirely dependent on the time required for the solvent to pass through the coal seam under gravity drive. Because the thickness of the coal bed is limited, the flow rate of the solvent is high, and the actual contact time of the two in each stage of extraction process is short, the solvent extraction effect cannot be fully exerted, and the overall extraction efficiency is low. Therefore, how to prolong the dynamic contact time of coal and solvent becomes a key improvement direction for improving the extraction efficiency of montan wax. Disclosure of Invention In view of the above, the invention aims to provide production equipment and a method for extracting montan wax from lignite, which are used for solving the technical problems of short contact time of a solvent and a coal bed and low overall extraction process in the prior art. In order to achieve the above purpose, the technical scheme adopted by the production equipment for extracting montan wax from lignite is as follows: a production device for extracting montan wax from lignite comprises The extractor comprises a feed inlet, a discharge outlet, a liquid outlet and a solvent inlet, wherein the feed inlet is used for allowing lignite particles to enter the extractor for extraction, extracted lignite residues are discharged from the discharge outlet, and extract liquid is discharged from the liquid outlet; The desolventizing device is used for communicating with a discharge port of the extractor so as to dry and desolventize the extracted lignite residues; The solid-liquid separator comprises an extraction liquid inlet, a filter residue outlet and a filter liquid outlet, the extraction liquid inlet is communicated with a liquid outlet of the extractor, separated coal dust is discharged from the filter residue outlet, and filter liquid is discharged from the filter liquid outlet; The evaporator is used for being communicated with a filtrate outlet of the solid-liquid separator so as to increase the concentration of montan wax and resin in the filtrate; The crystallizer is communicated with the evaporator so as to crystallize and separate out montan wax in the filtrate; A centrifuge in communication with the crystallizer for separating the crystallized montan wax from the resin solvent mixture; The evaporation concentrator is communicated with the centrifugal machine to evaporate the solvent in the resin solvent mixed solution to obtain concentrated resin; The extractor comprises an extraction tank, the extension direction of the extraction tank is defined a