CN103157651B - Resource utilization method of high-water-content pure terephthalic acid (PTA) residue - Google Patents
Resource utilization method of high-water-content pure terephthalic acid (PTA) residue Download PDFInfo
- Publication number
- CN103157651B CN103157651B CN201310106761.0A CN201310106761A CN103157651B CN 103157651 B CN103157651 B CN 103157651B CN 201310106761 A CN201310106761 A CN 201310106761A CN 103157651 B CN103157651 B CN 103157651B
- Authority
- CN
- China
- Prior art keywords
- pta residue
- pta
- activated sludge
- residue
- moisture percentage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a resource utilization method of high-water-content pure terephthalic acid (PTA) residue. The method comprises the steps of grinding, thinning and grading the high-water-content PTA residue, and thus obtaining PTA residue powder with the granularity of 30 to 120 meshes; mixing the pretreated high-water-content PTA residue powder with activated sludge in a mixture ratio of the quality of the PTA residue powder to the volume of the activated sludge, wherein the mixture ratio is 100 to 500 g/L; mechanically dehydrating a mixture of the high-water-content PTA residue powder and the activated sludge in a filtration mode under positive pressure; and performing filter cake utilization, namely combustion or pyrolysis. The method is simple and practical in process flow, and has a potential large-scale industrial application prospect. The aim of treating the high-water-content PTA residue and the activated sludge can be effectively fulfilled.
Description
Technical field
The present invention relates to solid waste process and recycling field, be specifically related to a kind of method that high-moisture percentage PTA residue as resources utilizes.
Background technology
Since reform and opening-up, China's oil chemical engineering industry is developed on an unprecedented scale, and numerous light and textile industries and printing and dyeing mill take PTA as raw material, and produce many PTA residue pollutants, the COD value contained is very high for this reason, impact discharge, the development of serious restriction industry; If do not process and directly discharge, severe contamination enterprise and surrounding enviroment thereof are affected the sustainable development of enterprise by this.According to estimates, every 1,000,000 tons of PTA discharge the PTA residue of water content 50% ~ 60% at 0.7 ~ 10,000 ton, and within 2014, national PTA production capacity will reach 3,500 ten thousand tons, and PTA residue will reach 40-70 ten thousand tons when the time comes.The main component of PTA residue has: water, benzoic acid, terephthalic acid (TPA), M-phthalic acid, cobalt acetate and manganese acetate etc., wherein benzene polycarboxylic acid (benzoic acid-mellitic acid) accounts for more than 80% of PTA residue siccative.PTA residue is white crystal or powder, and water content is generally 50% ~ 60%, loosely organized, have very large specific area, and calorific value is higher.
The processing method of current PTA residue mainly contains burning, for the manufacture of keeping out material, separation and recovery useful constituent three class methods wherein.Separation and recovery useful constituent method wherein mainly adopts the method for physics or chemistry to carry out the constituent part such as separation and recovery benzoic acid wherein, terephthalic acid (TPA), cobalt, manganese, as: CN101747173A, CN1195660A, CN1253942A, CN101096334A, CN1611481A, CN100408491C etc.For the manufacture of the coating, plasticizer, benzene carboxylic acid fat, active carbon, unsaturated-resin etc. of low grade, as CN1078738A, CN1079489A, CN1163883A, CN1490300A, CN1249013C, CN1508067A etc.But the technical difficulty involved by above-mentioned patent is comparatively large, the complexity of the higher and product of cost of investment, said method does not obtain popularity.
The method of burning as simple the most practical treatment PTA residue is applied more, as CN1279272A, CN2392992Y, CN1161193C, CN2503364Y, CN101261011B etc. at present.But the water content of PTA residue is large, and fusing point lower (70 DEG C-140 DEG C), therefore in boiler plant, burn PTA residue first need to dewater to it, and then by the waste heat of boiler, heating is carried out to residue and its liquefy and then injection are entered in stove burn.Above-mentioned technics comparing is complicated, and residue very easily produces corrosion to boiler plant in boiler burns.Therefore, how fully effectively and the recycling realizing high-moisture percentage PTA residue of safely cleaning is very important.
The moisture content of moisture activated sludge is high, viscosity large, poor fluidity, and calorific value is lower; Containing a large amount of fibers, be cotton-shaped colloform texture, not easily dewater, belong to the category of evenly high solid heterogeneous fluid.The heat treatment of moisture activated sludge utilizes and can reach the minimizing of activated sludge, innoxious, stabilisation largely, and can utilize its Lower heat value.But pre-dried needs to consume a large amount of heats, and can produce the secondary pollution such as pernicious gas, residue, causes the problems such as cost is high, energy consumption is high, secondary pollution refractory reason.The process of activated sludge with disposal general flow is: concentrated → nitrated → to dewater → landfill or burning.Usually the stable of activated sludge and dehydration are called the process of activated sludge, the compost of activated sludge, landfill, mummification and heating and final utilization are called the disposal of activated sludge.No matter be burning, landfill or compost recycling, the high-moisture percentage of activated sludge is all critical limiting factor.The general second pond activated sludge moisture content of discharging is up to 98% even 99%, and after concentration, activated sludge moisture content is also about 97%.The process of current activated sludge, mainly adds different polymer modifications and carries out mechanical dehydration again.CN200610130119.6, CN200710026547.9, CN200810073603.9, CN200910063774.8, CN201010184793.9, the patents such as CN20101029361.0, CN201110031386.9 describe inorganic additive in detail, and such as powdered biomass, slag, waste residue etc. improve the technology of dewatering performance of sludge.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of method that high-moisture percentage PTA residue as resources utilizes is provided, the method has considered the character of high-moisture percentage PTA residue and activated sludge, by two kinds of material mix and blend filter-press dehydrations, prepare filter cake, the filter cake fuel prepared by the present invention can be used for burning or pyrolysis.
The technical solution used in the present invention is: a kind of method that high-moisture percentage PTA residue as resources utilizes, and comprises the following steps:
(1) pretreatment of high-moisture percentage PTA residue
High-moisture percentage PTA residue is ground, levigate and classification, obtaining granularity is 30 order ~ 120 object PTA residue powder;
(2) high-moisture percentage PTA residue mixes with activated sludge
Mixed with activated sludge by pretreated high-moisture percentage PTA residue powder, mixed proportion relative to the volume computing of activated sludge, is 100g/L ~ 500g/L according to the quality of PTA residue powder;
(3) mechanical dehydration
High-moisture percentage PTA residue powder and activated sludge mixture are carried out mechanical dehydration, and mechanical dehydration is positive press filtration;
(4) filter cake utilizes
Filter cake Land use systems is: burning or pyrolysis.
After mechanical dehydration, count in mass ratio, filter cake mixture moisture content drops to 35% ~ 55%, and calorific value, at 2500kcal/kg ~ 4000kcal/kg, can carry out recycling, and the mode of recycling is: burning or pyrolysis.
As preferably, in above-mentioned steps (1), described PTA residue moisture content is 50% ~ 70%.
As preferably, in above-mentioned steps (2), described activated sludge is the mud produced in waste water of paper mill treatment process, petrified waste water treatment process or printing-dyeing waste water treatment process, and the moisture content of activated sludge is 90% ~ 99%.
As preferably, in above-mentioned steps (2), described hybrid mode adopts and stirs, stir speed (S.S.) 300 ~ 600 revs/min, mixing time 10 ~ 30min.
As preferably, in above-mentioned steps (3), filtration temperature is normal temperature, and adopt vacuum filtration, air pressure filters or plate-frame filtering, filter pressure is 1.0MPa ~ 2.0Mpa, and the filtration control time is 20 ~ 60min.
Beneficial effect: the present invention proposes a kind of method that high-moisture percentage PTA residue as resources utilizes, by high-moisture percentage PTA residue and activated sludge mixing machinery filter pressing for filter cake fuel.On the one hand activated sludge add the low melting point characteristic (PTA residue melt temperature 70 DEG C ~ 140 DEG C) contributing to improving PTA residue, the Corrosion blockage to burning facility simultaneously when can reduce burning residual dregs; High-moisture percentage PTA residue is loosely organized on the other hand, water content 50% ~ 60%, there is very large specific area, energy adsorption activity mud colloidal substance, and form the very high filter cake of voidage, the inside rigid particles shape structure crystal material can be used as filter aid, with activated sludge dehydration process in easily form filter cake skeleton, reduction filtration resistance.After both mixing press filtrations, the moisture content of mixture drops to 35%-55%, and calorific value reaches 2500kcal/kg-4000kcal/kg, completely can as the main fuel of incinerator.Present invention process flow process is simple, practical, effectively can realize the object of high-moisture percentage PTA residue and active sludge treatment disposal, have potential large-scale industrial application prospect.
Detailed description of the invention
Embodiment 1
Get the petroleum chemical industry activated sludge that moisture content is 90%, dry base heat value 4832.3kcal/kg.
A kind of method that high-moisture percentage PTA residue as resources utilizes is as follows:
(1) pretreatment of high-moisture percentage PTA residue
By moisture content be 50% PTA residue carry out grinding, levigate and classification, obtaining granularity is 30 order ~ 90 object PTA residue powder;
(2) PTA residue mixes with activated sludge
Mixed with pretreated PTA residue powder by activated sludge, mixed proportion relative to the volume computing of activated sludge, is 500g/L according to the quality of PTA residue powder, stir speed (S.S.) 600 revs/min, mixing time 30min;
(3) mechanical dehydration
PTA residue powder and activated sludge mixture are carried out mechanical dehydration, and filtration temperature is normal temperature, and adopt plate and frame type filter-press to extrude, filter pressure is 2.0MPa, and adopt positive press filtration, the filtration control time is 60min;
(4) filter cake utilizes
Filter cake Land use systems is: burning or pyrolysis.
After mechanical dehydration, count in mass ratio, filter cake mixture moisture content is 35%, calorific value 4000kcal/kg, in conversion filter cake, the calorific value of PTA residue contribution is 2168.4kcal/kg, in activated sludge, the calorific value of combustible contribution is that 1831.6kcal/kg can carry out recycling, and the mode of recycling is: burning.
Embodiment 2
Get the petroleum chemical industry activated sludge that moisture content is 90%, dry base heat value 4832.3kcal/kg.
A kind of method that high-moisture percentage PTA residue as resources utilizes is as follows:
(1) pretreatment of high-moisture percentage PTA residue
The PTA residue of moisture content 55% is carried out grind, levigate and classification, obtaining granularity is 60 order ~ 100 object PTA residue powder;
(2) PTA residue mixes with activated sludge
Mixed with pretreated PTA residue powder by activated sludge, mixed proportion relative to the volume computing of activated sludge, is 400g/L according to the quality of PTA residue powder, stir speed (S.S.) 500 revs/min, mixing time 30min;
(3) mechanical dehydration
PTA residue powder and activated sludge mixture are carried out mechanical dehydration, and filtration temperature is normal temperature, and adopt plate and frame type filter-press to extrude, filter pressure is 1.8MPa, and adopt positive press filtration, the filtration control time is 50min;
(4) filter cake utilizes
Filter cake Land use systems is: burning or pyrolysis.
After mechanical dehydration, count in mass ratio, filter cake mixture moisture content drops to 38%, calorific value 3750kcal/kg, in conversion filter cake, the calorific value of PTA residue contribution is 1932.7kcal/kg, in activated sludge, the calorific value of combustible contribution is that 1817.3kcal/kg can carry out recycling, and the mode of recycling is: burning.
Embodiment 3
Get the paper industry activated sludge that moisture content is 95%, dry base heat value 3529.3kcal/kg.
A kind of method that high-moisture percentage PTA residue as resources utilizes is as follows:
(1) pretreatment of high-moisture percentage PTA residue
The PTA residue of moisture content 60% is carried out grind, levigate and classification, obtaining granularity is 60 order ~ 100 object PTA residue powder;
(2) PTA residue mixes with activated sludge
Mixed with pretreated PTA residue powder by activated sludge, mixed proportion relative to the volume computing of activated sludge, is 250g/L according to the quality of PTA residue powder, stir speed (S.S.) 400 revs/min, mixing time 20min;
(3) mechanical dehydration
PTA residue powder and activated sludge mixture are carried out mechanical dehydration, and filtration temperature is normal temperature, and adopt plate and frame type filter-press to extrude, filter pressure is 1.5MPa, and adopt positive press filtration, the filtration control time is 45min;
(4) filter cake utilizes
Filter cake Land use systems is: burning or pyrolysis.
After mechanical dehydration, count in mass ratio, filter cake mixture moisture content drops to 43%, calorific value 3200cal/kg, in conversion filter cake, the calorific value of PTA residue contribution is 1681.8kcal/kg, in activated sludge, the calorific value of combustible contribution is that 1518.2kcal/kg can carry out recycling, and the mode of recycling is: burning.
Embodiment 4
Get municipal sewage plant's activated sludge that moisture content is 99%, dry base heat value 3865.6kcal/kg.
A kind of method that high-moisture percentage PTA residue as resources utilizes is as follows:
(1) pretreatment of high-moisture percentage PTA residue
The PTA residue of moisture content 70% is carried out grind, levigate and classification, obtaining granularity is 80 order ~ 120 object PTA residue powder;
(2) PTA residue mixes with activated sludge
Mixed with pretreated PTA residue powder by activated sludge, mixed proportion relative to the volume computing of activated sludge, is 150g/L according to the quality of PTA residue powder, stir speed (S.S.) 300 revs/min, mixing time 10min;
(3) mechanical dehydration
PTA residue powder and activated sludge mixture are carried out mechanical dehydration, and filtration temperature is normal temperature, and adopt plate and frame type filter-press to extrude, filter pressure is 1.5MPa, and adopt positive press filtration, the filtration control time is 20min;
(4) filter cake utilizes
Filter cake Land use systems is: burning or pyrolysis.
After mechanical dehydration, count in mass ratio, filter cake mixture moisture content drops to 50%, calorific value 2800kcal/kg, in conversion filter cake, the calorific value of PTA residue contribution is 1385.6kcal/kg, in activated sludge, the calorific value of combustible contribution is that 1414.4kcal/kg can carry out recycling, and the mode of recycling is: pyrolysis.
Embodiment 5
Get municipal sewage plant's activated sludge that moisture content is 99%, dry base heat value 3865.6kcal/kg.
A kind of method that high-moisture percentage PTA residue as resources utilizes is as follows:
(1) pretreatment of high-moisture percentage PTA residue
The PTA residue of moisture content 70% is carried out grind, levigate and classification, obtaining granularity is 50 order ~ 100 object PTA residue powder;
(2) PTA residue mixes with activated sludge
Mixed with pretreated PTA residue powder by activated sludge, mixed proportion relative to the volume computing of activated sludge, is 100g/L according to the quality of PTA residue powder, stir speed (S.S.) 550 revs/min, mixing time 15min;
(3) mechanical dehydration
PTA residue powder and activated sludge mixture are carried out mechanical dehydration, and filtration temperature is normal temperature, and adopt plate and frame type filter-press to extrude, filter pressure is 1.0MPa, and adopt positive press filtration, the filtration control time is 30min;
(4) filter cake utilizes
Filter cake Land use systems is: burning or pyrolysis.
After mechanical dehydration, count in mass ratio, filter cake mixture moisture content drops to 55%, calorific value 2500kcal/kg, in conversion filter cake, the calorific value of PTA residue contribution is 1182.4kcal/kg, in activated sludge, the calorific value of combustible contribution is that 1317.6kcal/kg can carry out recycling, and the mode of recycling is: pyrolysis.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each part not clear and definite in the present embodiment is realized.
Claims (5)
1. a method for high-moisture percentage PTA residue as resources utilization, is characterized in that: comprise the following steps:
(1) pretreatment of high-moisture percentage PTA residue
High-moisture percentage PTA residue is ground, levigate and classification, obtaining granularity is 30 order ~ 120 object PTA residue powder;
(2) high-moisture percentage PTA residue mixes with activated sludge
Mixed with activated sludge by pretreated high-moisture percentage PTA residue powder, mixed proportion relative to the volume computing of activated sludge, is 100g/L ~ 500g/L according to the quality of PTA residue powder;
(3) mechanical dehydration
High-moisture percentage PTA residue powder and activated sludge mixture are carried out mechanical dehydration, and mechanical dehydration is positive press filtration;
(4) filter cake utilizes
Filter cake Land use systems is: burning or pyrolysis.
2. the method for a kind of high-moisture percentage PTA residue as resources utilization according to claim 1, it is characterized in that: in above-mentioned steps (1), described PTA residue moisture content is 50% ~ 70%.
3. the method for a kind of high-moisture percentage PTA residue as resources utilization according to claim 1, it is characterized in that: in above-mentioned steps (2), described activated sludge is the mud produced in waste water of paper mill treatment process, petrified waste water treatment process or printing-dyeing waste water treatment process, and the moisture content of activated sludge is 90% ~ 99%.
4. the method for a kind of high-moisture percentage PTA residue as resources utilization according to claim 1, it is characterized in that: in above-mentioned steps (2), described hybrid mode adopts and stirs, stir speed (S.S.) 300 ~ 600 revs/min, mixing time 10 ~ 30min.
5. the method for a kind of high-moisture percentage PTA residue as resources utilization according to claim 1, it is characterized in that: in above-mentioned steps (3), mechanical dehydration can also adopt vacuum filtration, positive press filtration can adopt air pressure to filter or plate-frame filtering, filtration temperature is normal temperature, filter pressure is 1.0MPa ~ 2.0Mpa, and the filtration control time is 20 ~ 60min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310106761.0A CN103157651B (en) | 2013-03-28 | 2013-03-28 | Resource utilization method of high-water-content pure terephthalic acid (PTA) residue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310106761.0A CN103157651B (en) | 2013-03-28 | 2013-03-28 | Resource utilization method of high-water-content pure terephthalic acid (PTA) residue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103157651A CN103157651A (en) | 2013-06-19 |
| CN103157651B true CN103157651B (en) | 2015-07-15 |
Family
ID=48581479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310106761.0A Active CN103157651B (en) | 2013-03-28 | 2013-03-28 | Resource utilization method of high-water-content pure terephthalic acid (PTA) residue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103157651B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1356183A (en) * | 2001-10-10 | 2002-07-03 | 沈福昌 | Process for burning residual dregs of precision terephthalic acid (PTA) |
| CN101781073A (en) * | 2010-01-26 | 2010-07-21 | 东北大学 | Method of dewatering sludge and turning sludge into fuel |
| CN101786787A (en) * | 2010-03-24 | 2010-07-28 | 宇星科技发展(深圳)有限公司 | Sludge dewatering integrated process |
| CN102249506A (en) * | 2010-05-19 | 2011-11-23 | 中国石油化工股份有限公司 | Treatment method of PTA (purified terephthalic acid) chemical wastewater excess sludge |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0661560B2 (en) * | 1988-02-26 | 1994-08-17 | 宇部興産株式会社 | Treatment method of activated excess sludge |
-
2013
- 2013-03-28 CN CN201310106761.0A patent/CN103157651B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1356183A (en) * | 2001-10-10 | 2002-07-03 | 沈福昌 | Process for burning residual dregs of precision terephthalic acid (PTA) |
| CN101781073A (en) * | 2010-01-26 | 2010-07-21 | 东北大学 | Method of dewatering sludge and turning sludge into fuel |
| CN101786787A (en) * | 2010-03-24 | 2010-07-28 | 宇星科技发展(深圳)有限公司 | Sludge dewatering integrated process |
| CN102249506A (en) * | 2010-05-19 | 2011-11-23 | 中国石油化工股份有限公司 | Treatment method of PTA (purified terephthalic acid) chemical wastewater excess sludge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103157651A (en) | 2013-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Xu et al. | Treatment of urban sludge by hydrothermal carbonization | |
| CN102381820B (en) | Sludge treatment process based on hydrothermal modification technology | |
| CN102432007A (en) | Method for preparing activated carbon by physical activation of excess sludge | |
| CN105542808A (en) | All-closed zero-emission household refuse energy regeneration and comprehensive utilization production process | |
| CN103613784A (en) | Method for recovering chemical fibers from waste textiles | |
| CN107057787B (en) | The method that coal conversion waste water cascade utilization prepares fuel slurry | |
| CN104673424A (en) | Method for preparing novel energy material | |
| CN105733734A (en) | Method and device for preparing fuel by means of mixing coke powder with sludge from sewage plants | |
| CN108929737A (en) | Biomass solid clean fuel and its preparation method and application | |
| CN102311833A (en) | Method of preparing regenerated coal from municipal solid waste | |
| CN101007975A (en) | Method for preparing clean coal from sludge | |
| CN103537477B (en) | Staged treatment equipment and technique for leather making wastes | |
| CN103408010B (en) | A kind of black liquid that utilizes is prepared the method for active carbon for activating agent | |
| CN102732345A (en) | Sludge coal-water slurry and preparation method thereof | |
| CN107057794A (en) | A kind of house refuse modification forming and the method for gasification | |
| Guo et al. | Waste coal gasification fine slag disposal mode via a promising “efficient non-evaporative dewatering & mixed combustion”: A comprehensive theoretical analysis of energy recovery and environmental benefits | |
| CN102517117B (en) | Method for preparing alternative fuel for cement kiln by using waste paint slag | |
| CN103157651B (en) | Resource utilization method of high-water-content pure terephthalic acid (PTA) residue | |
| CN108410505A (en) | A method of preparing water-gas using organic dangerous waste | |
| CN108949267B (en) | High-concentration sludge coal slurry, preparation method and application thereof | |
| CN101613633B (en) | Fuel containing dyeing waste water sludge and method for preparing same | |
| CN103848882A (en) | Turmeric saponin extraction method without waste emission | |
| CN109504485A (en) | Utilize the solid fuel and its preparation method and application of sewage plant sludge preparation | |
| CN104843960A (en) | Household garbage and municipal sludge synergized recycling treatment process | |
| CN101982207B (en) | Method for treating wastes generated in the synthetic processes of methylamine and dimethyl formamide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220617 Address after: 214424 No. 23, Shanquan Road, Zhouzhuang Town, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: Jiangyin QUANNENG Environmental Technology Co.,Ltd. Address before: 211189 No. 2 Southeast University Road, Jiangning District, Nanjing, Jiangsu Patentee before: SOUTHEAST University |