CN105439231A - Method for processing coal-chemical-industry salt-containing sewage based in furnace internal combustion - Google Patents

Method for processing coal-chemical-industry salt-containing sewage based in furnace internal combustion Download PDF

Info

Publication number
CN105439231A
CN105439231A CN201510971171.3A CN201510971171A CN105439231A CN 105439231 A CN105439231 A CN 105439231A CN 201510971171 A CN201510971171 A CN 201510971171A CN 105439231 A CN105439231 A CN 105439231A
Authority
CN
China
Prior art keywords
coal
salt
crystallisate
saline sewage
sewage
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.)
Granted
Application number
CN201510971171.3A
Other languages
Chinese (zh)
Other versions
CN105439231B (en
Inventor
史航
吴玉新
吕俊复
张海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsinghua University
Original Assignee
Tsinghua University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tsinghua University filed Critical Tsinghua University
Priority to CN201510971171.3A priority Critical patent/CN105439231B/en
Publication of CN105439231A publication Critical patent/CN105439231A/en
Application granted granted Critical
Publication of CN105439231B publication Critical patent/CN105439231B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048—Purification of waste water by evaporation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

A method for processing coal-chemical-industry salt-containing sewage based in furnace internal combustion is disclosed and belongs to the technical field of sewage processing. According to the method, salt-containing sewage is processed by using crystallization equipment, thus a crystal substance is formed, then the crystal substance is added into a boiler for blending combustion, contamination scorification and high-temperature chlorine corrosion are comprehensive considered, the maximum processing quantity of salt-containing sewage with different concentrations is calculated according to the mass percentage of crystal-substance alkali metal salts in the original salt-containing sewage, various organics and a large amount of inorganic salts in the salt-containing sewage crystal substance are effectively processed in a high-temperature combustion environment, and thus the large-scale processing problem of the salt-containing sewage is solved. Under the cases that the boiler is safely economically operated and the boiler thermal efficiency decrease is acceptable, the coal-chemical-industry sewage processing cost is greatly reduced, and the method is applicable to process coal-chemical-industry with high alkali metal content.

Description

Based on the method for stove combustion process Coal Chemical Industry saline sewage
Technical field
The present invention relates to a kind of method based on stove combustion process Coal Chemical Industry saline sewage, be add in boiler after crystallisate to carry out mixing burning by coal chemical industry sewage evaporation concentration, and consider Slagging, high temperature chloride corrosion, calculate Coal Chemical Industry saline sewage maximum throughput, to ensure the safety and economic operation of boiler, belong to technical field of sewage.
Background technology
Coal Chemical Industry needs to consume a large amount of water, 130 kinds are reached containing all kinds of organism being difficult to degrade in typical case's coal chemical industry sewage, its main component comprises COD (2000 ~ 4000mg/L), ammonia nitrogen (200 ~ 500mg/L), total phenol mass concentration is 300 ~ 1000mg/L, volatile phenol mass concentration is 50 ~ 300mg/L, simultaneously also containing hazardous and noxious substances such as prussiate, thiocyanide, polycyclc aromatic compound and heterogeneous ring compounds.In addition, also containing all kinds of soluble inorganic salt (crystal salt) in coal chemical industry sewage, concrete content depends on the mineral composition in coal, but it is main based on an alkali metal salts such as sodium salts, although above-mentioned inorganic salt output is larger, but purity is not high, commercial value is very low, about the research of collecting ash and slagging scorification shows, the alkali-metal existence such as sodium has material impact to boiler Slagging, and is the major reason reducing coal ash sintering temperature, accelerate coal ash sintering rate and increase sintering strength and cause wall erosion.The mass-producing being mixed with various organic saline sewage is treated as the major obstacle affecting Coal Chemical Engineering Project construction and performance driving economy.
Summary of the invention
The invention provides a kind of method based on stove combustion process Coal Chemical Industry saline sewage.Be add in boiler after crystallisate to carry out mixing burning by coal chemical industry sewage evaporation concentration; it effectively can dispose each type organic in crystallisate in high-temp combustion environment; inorganic salt based on an alkali metal salt in crystallisate can solidify again by coal ash, thus solve the mass-producing process problem of saline sewage.
Technical scheme of the present invention is as follows:
Based on a method for stove combustion process Coal Chemical Industry saline sewage, it is characterized in that:
1) by saline sewage by crystallizer process, form solid state crystallization thing, crystallisate added burner hearth and carry out mixing burning;
2) Coal Chemical Industry saline sewage maximum throughput is calculated:
Q＝M salt/w①
In formula:
M salt＝min(C sm salt,0.003m coalC cl,0.0148A arm coal)②
Wherein, Q is Coal Chemical Industry saline sewage maximum throughput; M saltfor considering the limit content mixing an alkali metal salt in burning saline sewage crystallisate that contamination, chlorine corrosion and experimental data obtain; C s=(N 1/ N 2+ 0.5N 3/ N 4), N 1for Na 2the massfraction of Na element in O, N 2represent the Na element massfraction in sodium salt in saline sewage crystallisate, N 3for K 2the massfraction of K element in O, N 4represent the massfraction of K element in sylvite in saline sewage crystallisate; m saltfor mixing of only considering that Slagging risk obtains is burnt with Na 2o+0.5K 2o is an alkali metal salt maximum level in the saline sewage crystallisate of composition; C cl=1/N cl, wherein N clrepresent the ratio of Cl element and an alkali metal salt in saline sewage; m coalrepresent steam coal consumption; A arrepresent pit ash content; W represents an alkali metal salt massfraction in Coal Chemical Industry saline sewage.
When mixing of only considering that Slagging risk obtains is burnt with Na 2o+0.5K 2o is that the maximum level following formula of alkali gold salt in the saline sewage crystallisate of composition calculates:
m salt = m coal A ar ( s limit - s ) 100 ( 100 - s limit ) ③
Sodium salt equivalent S=Na in ash 2o+0.5K 2o (%); The method of calculation of sodium salt limit fixed value in coal:
R＝(A-BV daf)(Na 2O+CK 2O)<R limt④
Coal ash sodium salt ultimate value is S limit=R limit/ (A-BV daf) (%); m coalfor boiler consumption of coal; R is sodium salt limit fixed value in coal; R limitfor the ultimate value of sodium salt limit fixed value in coal;
Constant A, B weigh coal affects size model parameter on sodium salt fixed pole limit value; C weighs K 2the equivalent constant that O affects sodium salt fixed pole limit value; V daffor dry ash-free basis volatile content; Na 2o and K 2o represents the massfraction that this two oxides is shared in coal ash respectively.
In technique scheme, crystallisate being added the mode that burner hearth mixes burning is: to circular fluid bed, joined by crystallisate in Limestone silo, enter burner hearth with Wingdale; To pulverized coal firing boiler, crystallisate is joined in coal pulverizer, enter burner hearth with coal dust.
The present invention has the following advantages and high-lighting effect: 1. the present invention adds in boiler and carries out mixing burning after being crystallisate by coal chemical industry sewage evaporative crystallization under the condition ensureing safe operation of the boiler, each type organic of crystallisate and a large amount of inorganic salt are effectively disposed in high-temp combustion environment, thus solve the mass-producing process problem of saline sewage, practical; 2. the present invention affects boiler operation performance hardly, and cost is mainly evaporation and crystal process, greatly reduces coal chemical industry sewage processing cost, good economy performance; 3. present method considers the Slagging risk that Boiler Mixed Burning causes, and chlorine corrosion risk and experimental data obtain the final method of calculation of boiler process an alkali metal salt amount, have good theoretical basis; 4. mix the crystallisate of burning coal chemical industry sewage generation almost without the need to transforming boiler, be convenient to maintenance of equipment in the future and replacing, running cost is low.
Accompanying drawing explanation
Fig. 1 is provided by the invention with the structure diagram of high saliferous softening water for the natural circulation injection boiler of feedwater.
1-crystallizer; 2-feeding device; 3-premixing device; 4-boiler.
Embodiment
Principle of the present invention, concrete structure and preferred forms is further illustrated below in conjunction with accompanying drawing.
Be add in boiler after crystallisate to carry out mixing burning by coal chemical industry sewage evaporation concentration, it is characterized in that the solid state crystallization thing by crystallizer 1 process is formed adds in premixing device 3 by feeding device 2, to circular fluid bed, premixing device 3 can be Limestone silo, now, crystallisate enters boiler 4 with Wingdale and carries out mixing burning; To pulverized coal firing boiler, premixing device can be coal pulverizer, and now, crystallisate enters boiler 4 with coal dust to carry out mixing burning.Premixing device 3 can be arbitrary equipment in boiler feeding device, is not limited to the equipment of suggestion.
Coal Chemical Industry saline sewage maximum throughput is by calculating.Coal Chemical Industry saline sewage treatment capacity mainly restricts by alkali metal content, and analyze basic metal occurrence form in saline sewage, 4. 3. through type calculate with formula with Na 2o+0.5K 2o is an alkali metal salt limit content m in the saline sewage crystallisate of composition salt, consider contamination, chlorine corrosion and experimental data and obtain an alkali metal salt limit content M in boiler saline sewage crystallisate salt, the massfraction accounting for former saline sewage by an alkali metal salt in crystallisate calculates the saline sewage maximum throughput of different concns, and computation process is as follows:
Coal Chemical Industry saline sewage maximum throughput:
Q＝M salt/w①
In formula:
M salt＝min(C sm salt,0.003m coalC cl,0.0148A arm coal)②
Wherein, Q is Coal Chemical Industry saline sewage maximum throughput; M saltfor considering the limit content mixing an alkali metal salt in burning saline sewage crystallisate that contamination, chlorine corrosion and experimental data obtain; C s=(N 1/ N 2+ 0.5N 3/ N 4), N 1for Na 2the massfraction of Na element in O, N 2represent the Na element massfraction in sodium salt in saline sewage crystallisate, N 3for K 2the massfraction of K element in O, N 4represent the massfraction of K element in sylvite in saline sewage crystallisate; m saltfor mixing of only considering that Slagging risk obtains is burnt with Na 2o+0.5K 2o is an alkali metal salt maximum level in the saline sewage crystallisate of composition; C cl=1/N cl, wherein N clrepresent the ratio of Cl element and an alkali metal salt in saline sewage; m coalrepresent steam coal consumption; A arrepresent pit ash content; W represents an alkali metal salt massfraction in Coal Chemical Industry saline sewage.
m salt = m coal A ar ( s limit - s ) 100 ( 100 - s limit ) ③
Sodium salt equivalent S=Na in ash 2o+0.5K 2o (%); The method of calculation of sodium salt limit fixed value in coal:
R＝(A-BV daf)(Na 2O+CK 2O)<R limt④
Coal ash sodium salt ultimate value is S limit=R limit/ (A-BV daf) (%); m coalfor boiler consumption of coal; R is sodium salt limit fixed value in coal; R limitfor the ultimate value of sodium salt limit fixed value in coal, when R is higher than R limittime, think that sodium salt exceedes maximum crystallized ability in coal, will there is dust stratification contamination problems in this coal ash in boiler operatiopn.
Constant A, B weigh coal affects size model parameter on sodium salt fixed pole limit value; C weighs K 2the equivalent constant that O affects sodium salt fixed pole limit value; V daffor dry ash-free basis volatile content; Na 2o and K 2o represents the massfraction that this two oxides is shared in coal ash respectively.
The present invention has the following advantages and high-lighting effect: 1. the present invention adds in boiler and carries out mixing burning after being crystallisate by coal chemical industry sewage evaporation concentration under the condition ensureing safe operation of the boiler, each type organic of crystallisate and a large amount of inorganic salt are effectively disposed in high-temp combustion environment, thus solve the mass-producing process problem of saline sewage, practical; 2. the present invention affects boiler operation performance hardly, and cost is mainly evaporation and crystal process, greatly reduces coal chemical industry sewage processing cost, good economy performance; 3. present method considers the Slagging risk that Boiler Mixed Burning causes, and chlorine corrosion risk and experimental data obtain the final method of calculation of boiler process an alkali metal salt amount, have good theoretical basis; 4. mix the crystallisate of burning coal chemical industry sewage generation almost without the need to transforming boiler, be convenient to maintenance of equipment in the future and replacing, running cost is low.
The invention provides a kind of method based on stove combustion process Coal Chemical Industry saline sewage, have practical, good economy performance, there is good theoretical basis, the feature that running cost is low.Be applicable to the mass-producing process of the coal chemical industry sewage of high basic metal content.

Claims (3)

1., based on the method for stove combustion process Coal Chemical Industry saline sewage, it is characterized in that:
1) saline sewage is processed by crystallizer (1), form solid state crystallization thing, crystallisate is added burner hearth and carry out mixing burning;
2) Coal Chemical Industry saline sewage maximum throughput is calculated:
Q＝M salt/w①
In formula:
M salt＝min(C sm salt,0.003m coalC cl,0.0148A arm coal)②
Wherein, Q is Coal Chemical Industry saline sewage maximum throughput; M saltfor considering the limit content mixing an alkali metal salt in burning saline sewage crystallisate that contamination, chlorine corrosion and experimental data obtain; C s=(N 1/ N 2+ 0.5N 3/ N 4), N 1for Na 2the massfraction of Na element in O, N 2represent the Na element massfraction in sodium salt in saline sewage crystallisate, N 3for K 2the massfraction of K element in O, N 4represent the massfraction of K element in sylvite in saline sewage crystallisate; m saltfor mixing of only considering that Slagging risk obtains is burnt with Na 2o+0.5K 2o is an alkali metal salt maximum level in the saline sewage crystallisate of composition; C cl=1/N cl, wherein N clrepresent the ratio of Cl element and an alkali metal salt in saline sewage; m coalrepresent steam coal consumption; A arrepresent pit ash content; W represents an alkali metal salt massfraction in Coal Chemical Industry saline sewage.
2., according to the method based on stove combustion process Coal Chemical Industry saline sewage according to claim 1, it is characterized in that:
m s a l t = m c o a l A a r ( s lim i t - s ) 100 ( 100 - s lim it ) ③
Sodium salt equivalent S=Na in ash 2o+0.5K 2o (%); The method of calculation of sodium salt limit fixed value in coal:
R＝(A-BV daf)(Na 2O+CK 2O)<R limt④
Coal ash sodium salt ultimate value is S limit=R limit/ (A-BV daf) (%); m coalfor boiler consumption of coal; R is sodium salt limit fixed value in coal; R limitfor the ultimate value of sodium salt limit fixed value in coal;
Constant A, B weigh coal affects size model parameter on sodium salt fixed pole limit value; C weighs K 2the equivalent constant that O affects sodium salt fixed pole limit value; V daffor dry ash-free basis volatile content; Na 2o and K 2o represents the massfraction that this two oxides is shared in coal ash respectively.
3. according to the method based on stove combustion process Coal Chemical Industry saline sewage according to claim 1, it is characterized in that: crystallisate being added the mode that burner hearth mixes burning is: to circular fluid bed, crystallisate is joined in Limestone silo, enter burner hearth with Wingdale; To pulverized coal firing boiler, crystallisate is joined in coal pulverizer, enter burner hearth with coal dust.
CN201510971171.3A 2015-12-22 2015-12-22 Method based on burning processing coal chemical industry saline sewage in stove Active CN105439231B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510971171.3A CN105439231B (en) 2015-12-22 2015-12-22 Method based on burning processing coal chemical industry saline sewage in stove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510971171.3A CN105439231B (en) 2015-12-22 2015-12-22 Method based on burning processing coal chemical industry saline sewage in stove

Publications (2)

Publication Number Publication Date
CN105439231A true CN105439231A (en) 2016-03-30
CN105439231B CN105439231B (en) 2018-01-16

Family

ID=55549951

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510971171.3A Active CN105439231B (en) 2015-12-22 2015-12-22 Method based on burning processing coal chemical industry saline sewage in stove

Country Status (1)

Country Link
CN (1) CN105439231B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105948150A (en) * 2016-04-26 2016-09-21 天津理工大学 Process and system for recycling high-chloride high-concentration non-degradable organic wastewater

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101585620A (en) * 2009-06-26 2009-11-25 河北建新化工股份有限公司 Method for comprehensively treating high salt content organic industrial wastewater
CN204185249U (en) * 2014-11-10 2015-03-04 上海力脉环保设备有限公司 A kind for the treatment of unit of abraum salt
US20150075412A1 (en) * 2011-06-16 2015-03-19 Surendra Saxena Carbon Sequestration in Municipal Solid Waste to Energy Plants

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101585620A (en) * 2009-06-26 2009-11-25 河北建新化工股份有限公司 Method for comprehensively treating high salt content organic industrial wastewater
US20150075412A1 (en) * 2011-06-16 2015-03-19 Surendra Saxena Carbon Sequestration in Municipal Solid Waste to Energy Plants
CN204185249U (en) * 2014-11-10 2015-03-04 上海力脉环保设备有限公司 A kind for the treatment of unit of abraum salt

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
晁岳建等: "循环流化床锅炉掺烧气化渣和煤泥的可行性研究", 《化肥工业》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105948150A (en) * 2016-04-26 2016-09-21 天津理工大学 Process and system for recycling high-chloride high-concentration non-degradable organic wastewater

Also Published As

Publication number Publication date
CN105439231B (en) 2018-01-16

Similar Documents

Publication Publication Date Title
CN104058615B (en) A kind of system of cement kiln synergic processing house refuse
CN101074402B (en) Efficient sulfur-fixing agent and its usage
CN102191109B (en) Liquid coal additive and preparation method thereof
CN101348743A (en) Coal-saving devulcanized coke cleaning clean synergistic agent and preparation technique thereof
CN101269339B (en) High-efficiency fuel coal catalyst
Yu et al. Power generation from coal gangue in China: Current status and development
CN103977701A (en) Sludge flue gas denitration agent and preparation method and application thereof
CN102901106B (en) Flying ash processing device of fluidized bed incinerator
CN101735877A (en) Fire coal additive and preparation method thereof
CN102618348B (en) Coal-saving denitration combustion improver for cement industry
CN100431669C (en) Method for treating SO2 in coal firing smoke by red mud
CN101792247A (en) Sludge treatment method capable of combining powerful dehydration with low-temperature mummification
CN105439231A (en) Method for processing coal-chemical-industry salt-containing sewage based in furnace internal combustion
CN101955833A (en) Coal combustion catalyst
CN102268311A (en) Coal-burning sulfur-fixing catalytic combustion compound additive and preparation method thereof
CN101225343A (en) Coal-saving combustion-supporting additive
CN101434885A (en) Multiple-effect coal fines additive and efficient clean fire coal powder prepared thereby
Yang et al. The discharge status and technical analysis of NOX of thermal power plant boiler
CN100556998C (en) Energy-saving sulfur-reducing dust removal concentration liquid
CN105423312A (en) Method of treating coal chemical industry saliferous sewage based on combustion in furnace
CN112710002A (en) Method for treating oil-based rock debris by using pulverized coal fired boiler
CN102506434B (en) Decoction dregs blending and burning technology of employing circulating fluidized bed boiler of power plant
CN104479789A (en) Energy-saving sulfur-fixing clean fuel coal and preparation method thereof
CN102585967A (en) High-efficiency environment-friendly coal synergistic agent
CN216744312U (en) Aluminum cell overhaul slag resource utilization system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant