Resourceful treatment process of tar residue

A treatment process and tar residue technology, which is applied in the field of tar residue resource treatment technology, can solve the problems of complex process flow and inconspicuous separation effect, and achieve the effects of simplifying the separation process, saving energy and low energy consumption

Active Publication Date: 2018-01-09
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Resourceful treatment process of tar residue
  • Resourceful treatment process of tar residue
  • Resourceful treatment process of tar residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0034] (1) In the process of conveying raw material tar residue, inject alkylphenolic resin and cationic polyacrylamide and mix them evenly. The volume ratio of alkylphenolic resin and cationic polyacrylamide is 2:1, and the volume ratio of alkylphenolic resin and cationic polyacrylamide is 2:1. The mixed addition amount of acrylamide is corresponding to 200mg tar residue per liter, that is, the dosage is 200mg / L. Once the material enters the static tank, stir it for 2 hours at a constant temperature of 40 °C and a stirring speed of 120 r / min, and let it stand at 25 °C for 4 hours. The moisture content of about 47wt% and the sedimentation material at the bottom of the tower (accounting for 53wt% of the raw material) are sent to the process raw material storage tank for use.

[0035] (2) in step (1), the tar residue of dehydration and demulsification and the composite e...

Embodiment 2

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

[0044] (1) Inject ethylene oxide and cationic polyacrylamide into the raw material tar residue and mix them evenly. The volume ratio of ethylene oxide and cationic polyacrylamide is 1.5:1. The mixed addition amount of acrylamide is 200mg of tar residue per liter, that is, the dosage is 200mg / L. The second material enters the static tank and is stirred for 2 hours at a constant temperature of 35°C and a stirring speed of 100r / min. Moisture of about 45wt%, 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 use.

[0045] (2) in step (1), the tar residue of dehydration and demulsification and the composite extractant are mixed and preheated to 50 ℃ in the pipeline in front of the tower according to the mass ratio of 1.5:1 and sent into the hot extraction tower, and the extrac...

Embodiment 3

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

[0053] (1) In the process of conveying the raw material tar residue, inject polyethylene polyamine and cationic polyacrylamide and mix them evenly. The volume ratio of polyethylene polyamine and cationic polyacrylamide is 1:1. The mixed addition amount of acrylamide is corresponding to 100mg tar residue per liter, that is, the dosage is 100mg / L. Once the material enters the static tank, stir for 1 hour at a constant temperature of 50 °C and a stirring speed of 60 r / min, and stand at 20 °C for 4 hours. The bottom sedimentation material is sent to the process raw material storage tank for use.

[0054] (2) in step (1), the tar residue of dehydration and demulsification and the composite extractant are mixed and preheated to 50 ℃ in the pipeline in front of the tower according to the mass ratio of 2:1 and sent into the hot extraction tower, and the extraction condition is...

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Abstract

The invention provides a resourceful treatment process of tar residue. The resourceful treatment process is characterized in that demulsification dehydration, solvent extraction and centrifugal separation are taken as the core, distillate oil, obtained at the temperature of 200-230 DEG C, of coal tar is used as a main extracting agent, a small amount of crude benzene and industrial naphthalene areadded so as to form a composite extracting agent, and the proportion of all the components used in the process is as follows: 90-95wt/% of the distillate oil, obtained at the temperature of 200-230 DEG C, of the coal tar, 4.1-9.7wt/% of the crude benzene and 0.3-0.9wt/% of the industrial naphthalene; a technology of combining heat extraction and centrifugation is adopted under the conditions thatthe temperature of the demulsification dehydration is 35-55 DEG C, extraction temperature is 55-60DEG C, the pressure is 101.325kPa, the pump circulating flow rate is 15-20m<3>/h, the extraction timeis 3-4h, the centrifuge rotating speed is 2500-3000r/min, and the like, so that the recovery rate of tar in the tar residue reaches up to 95% or above. The resourceful treatment process is verified to be capable of well adapting to the raw material tar residue with water content of 20-60% in the aspect of raw material adaptability; the extracting agent used in the process does not need to be recovered after oil-water-residue separation is finished, can be directly used as an oil product component in the oil so as to be stored and utilized, and does not need to be recycled, so that the separation link is simplified, waste is avoided, and energy is saved; the resourceful treatment process effectively solves the problems of the tar residue in the aspects of energy utilization and environment-friendly treatment.

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 residue is formed when coal gasification and coking process, high boiling point organic compounds generated under high temperature conditions are mixed with coal powder and solid particles entrained in coal gas when condensing. Because most of the material in coal tar residue is coal dust, and a small part is tar, it is often piled up in the factory area as waste, becoming a kind of industrial waste residue that is difficult to handle. The sources of coal tar residue mainly come 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 tar residue from the natural sedimentation of the tar storage tank. Coal tar residue is an industrial waste residue, and its direct dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/00C10C1/02C10C1/06C10C1/10C10C1/12C10C1/14C10C1/18C10C1/19
Inventor 李冬冯弦崔楼伟裴亮军乌尼尔李启凡李稳宏
Owner NORTHWEST UNIV(CN)
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