A kind of tar residue resource treatment process

A treatment process and a technology for tar residue, which are applied in the field of tar residue resource treatment technology, can solve the problems of less obvious separation effect and complicated process flow, and achieve the effects of simplifying separation links, low energy consumption and energy saving.

Active Publication Date: 2019-06-07
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this set of technological process, the water-containing tar residue is firstly subjected to centrifugation, and there is a problem that the separation effect is not obvious, and the technological process is relatively complicated

Method used

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  • A kind of tar residue resource treatment process
  • A kind of tar residue resource treatment process
  • A kind of tar residue resource treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The tar residue recycling process of the present embodiment comprises the following steps:

[0034] (1) Inject the alkylphenol formaldehyde resin and cationic polyacrylamide into the process of conveying the raw material tar residue and mix them evenly. The volume ratio of the alkylphenol formaldehyde resin to the cationic polyacrylamide is 2:1. The mixing amount of acrylamide is 200mg of tar residue per liter, that is, the dosage is 200mg / L. Once the material enters the static tank, it is stirred at a constant temperature of 40°C and a stirring speed of 120r / min for 2h, and then stands at 25°C for 4h. About 47wt% of moisture, the sedimentation material at the bottom of the tower (accounting for 53wt% of the raw material) is sent to the process raw material storage tank for standby.

[0035] (2) The tar residue dehydrated and demulsified in step (1) and the composite extractant are mixed and preheated to 45°C in the pipeline in front of the tower according to the mass r...

Embodiment 2

[0043] The tar residue recycling process of the present embodiment comprises the following steps:

[0044] (1) Inject ethylene oxide and cationic polyacrylamide during the transportation of raw material tar residue and mix them uniformly. The volume ratio of ethylene oxide and cationic polyacrylamide is 1.5:1. The mixing amount of acrylamide is 200 mg of tar residue per liter, that is, the dosage is 200 mg / L. Material 2 enters the static tank and stirs for 2 hours at a constant temperature of 35 °C with a stirring speed of 100 r / min, and stands at 20 °C for 3 hours. About 45wt% of moisture, the sedimentation material at the bottom of the tower (accounting for 55wt% of the raw material) is sent to the process raw material storage tank for standby.

[0045] (2) The tar residue dehydrated and demulsified in step (1) and the composite extractant are mixed and preheated to 50°C in the pipeline in front of the tower according to the mass ratio of 1.5:1 and then sent to the thermal e...

Embodiment 3

[0052] The tar residue recycling process of the present embodiment comprises the following steps:

[0053] (1) Polyethylene polyammonia and cationic polyacrylamide are injected into the raw material tar residue transportation process and mixed evenly. The volume ratio of polyethylene polyammonia and cationic polyacrylamide is 1:1. The mixing amount of acrylamide is 100 mg of tar residue per liter, that is, the dosage is 100 mg / L. Once the material enters the static tank, it is stirred at a constant temperature of 50 °C and a stirring speed of 60 r / min for 1 h, and is left at 20 °C for 4 h. The bottom settled material is sent to the process raw material storage tank for standby.

[0054] (2) The tar residue dehydrated and demulsified in step (1) and the composite extractant are mixed and preheated to 50°C in the pipeline in front of the tower according to the mass ratio of 2:1, and then sent to the thermal extraction tower. The extraction condition is temperature 50℃, pressure...

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Abstract

The invention provides a tar residue resource treatment process, which takes emulsification dehydration, solvent extraction and centrifugal separation as the core, uses coal tar 200-230°C distillate oil as the main extraction agent, and adds a small amount of crude benzene and industrial naphthalene to form Composite extraction agent, the proportion of each component is: Coal tar 200-230℃ distillate 90-95wt / %, crude benzene 4.1-9.7wt / %, industrial naphthalene 0.3-0.9wt / %, the demulsification and dehydration temperature is 35 ‑55°C, extraction temperature 55‑60°C, pressure 101.325kPa, pump circulation flow 15‑20m3 / h, extraction time 3‑4h, centrifuge speed 2500‑3000r / min, etc., using a combination of thermal extraction and centrifugation The process enables the recovery rate of tar in the tar residue to reach more than 95%. In terms of raw material adaptability, the present invention has been verified to be very suitable for raw material tar residue with a moisture content of 20-60%. The extraction agent used is used to complete the oil-water process. The slag does not need to be recycled after separation. It is directly stored and utilized in the oil as an oil product component without recycling. It simplifies the separation process, avoids waste and saves energy. It effectively solves the problems of energy utilization and environmental protection treatment of tar residue.

Description

technical field [0001] The invention relates to the technical field of tar residue treatment in the coal pyrolysis industry, in particular to a tar residue resource treatment process. Background technique [0002] Coal tar slag is formed when high-boiling organic compounds generated under high temperature conditions are mixed with coal powder and solid particles entrained in the gas during the process of coal gasification and coking. Because most of the coal tar residue is coal dust and a small part is tar, it is often piled up as waste in the factory area and becomes a kind of difficult-to-handle industrial waste. The source of coal tar residue mainly comes from the tar residue at the bottom of the mechanized tar ammonia water clarification tank, which is the main source of tar residue, and the other comes from the tar residue from the natural settlement of the tar storage tank. Coal tar slag is an industrial waste, and its direct discharge will cause serious pollution to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/02
Inventor 李冬冯弦崔楼伟裴亮军乌尼尔李启凡李稳宏
Owner NORTHWEST UNIV
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