CN105423312B - A kind of method based on burning processing coal chemical industry saline sewage in stove - Google Patents

A kind of method based on burning processing coal chemical industry saline sewage in stove Download PDF

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Publication number
CN105423312B
CN105423312B CN201510969146.1A CN201510969146A CN105423312B CN 105423312 B CN105423312 B CN 105423312B CN 201510969146 A CN201510969146 A CN 201510969146A CN 105423312 B CN105423312 B CN 105423312B
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coal
saline sewage
sewage
salt
chemical industry
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CN105423312A (en
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史航
吴玉新
吕俊复
张海
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Tsinghua University
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Tsinghua University
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    • 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
    • F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/20—Waste supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/10—Liquid waste
    • F23G2209/101—Waste liquor

Abstract

A kind of method based on burning processing coal chemical industry saline sewage in stove, belongs to technical field of sewage.This method is to handle saline sewage by concentrator first; form the saline sewage that salt concentration is at least 5%; saline sewage after concentration is sprayed into burner hearth to carry out mixing burning; and Slagging, high temperature chloride corrosion are considered; calculate various concentrations saline sewage maximum straying quatity; each type organic in saline sewage and a large amount of inorganic salts are effectively disposed in high-temp combustion environment, so as to solve the scale process problem of saline sewage.The present invention ensure boiler safety and economic operation and boiler thermal output decline it is acceptable in the case of, coal chemical industry sewage processing cost is greatly reduced, suitable for the processing of the coal chemical industry sewage of high basic metal content.

Description

A kind of method based on burning processing coal chemical industry saline sewage in stove
Technical field
The present invention relates to a kind of method based on burning processing coal chemical industry saline sewage in stove, coal chemical industry sewage is directly sprayed Enter boiler to be handled, and consider Slagging, high temperature chloride corrosion, calculate various concentrations saline sewage maximum straying quatity, To ensure the safety and economic operation of boiler, belong to technical field of sewage.
Background technology
Coal chemical industry needs to consume substantial amounts of water, contains all kinds of organic matters for being difficult to degrade up in typical coal chemical industry sewage 130 kinds, its main component includes COD (2000~4000mg/L), ammonia nitrogen (200~500mg/L), and total phenol mass concentration is 300 ~1000mg/L, volatile phenol mass concentration are 50~300mg/L, while also containing cyanide, rhodanide, Ppolynuclear aromatic The poisonous and harmful substance such as compound and heterocyclic compound.In addition, also containing all kinds of soluble inorganic salts (knot in coal chemical industry sewage Brilliant salt), the mineral composition that concrete content is depended in coal, mainly based on the alkali metal salts such as sodium salt, though above-mentioned inorganic salts Right yield is larger, but purity is not high, and commercial value is very low, and the research about collecting ash and slagging shows, the alkali metal such as sodium Had a major impact in the presence of to boiler Slagging, and still reduce coal ash sintering temperature, accelerate coal ash sintering rate and increase Sintering strength and the major reason for causing wall erosion.The scale for being mixed with the saline sewage of various organic matters is treated as influenceing Coal Chemical Engineering Project construction and the major obstacle of performance driving economy.
The content of the invention
It is it is an object of the invention to provide a kind of method based on burning processing coal chemical industry saline sewage in stove, coal chemical industry is dirty Water sprays into boiler furnace, and each type organic in coal chemical industry sewage, and can solution can be effectively disposed in high-temp combustion environment The certainly scale process problem of saline sewage.
Technical scheme is as follows：
Coal chemical industry sewage is injected directly into boiler to be handled, it is characterised in that the concentration saliferous that concentrated equipment obtains is dirty Water sprays into burner hearth by pipeline and auxiliary equipment.Concentrate saline sewage and spray into burner hearth position according to boiler type and actual demand cloth Put, to CFBB, concentration saline sewage is sprayed into burner hearth at furnace roof or Secondary Air height；To pulverized-coal fired boiler, Burner hearth is sprayed at the top of from secondary air bellow or by concentration saline sewage below burnt wind.Concentrating saline sewage penetrating burner hearth position can Arrangement or many places are arranged and are not limited to proposed position at one.
It is as follows that coal chemical industry saline sewage maximum penetrating amount calculates process：
The saline sewage maximum straying quatity of various concentrations：
Q=Msalt/w ①
In formula:
Msalt=min (Csmsalt,0.003mcoalCcl,0.0148Aarmcoal) ②
Wherein, Q is coal chemical industry saline sewage maximum straying quatity；MsaltTo consider contamination, chlorine corrosion and experimental data What is obtained sprays into the limit content of alkali metal salt in saline sewage；Cs=(N1/N2+0.5N3/N4),N1For Na2Na elements in O Mass fraction, N2Represent the Na element mass fractions in sodium salt, N in saline sewage3For K2The mass fraction of K element, N in O4Table Show the mass fraction of K element in sylvite in saline sewage；msaltOnly to consider that Slagging risk obtains with Na2O+0.5K2O For alkali metal salt maximum level in the penetrating saline sewage of composition；CCl=1/Ncl, wherein NClRepresent saline sewage in Cl elements with The ratio of alkali metal salt；mcoalRepresent steam coal consumption；AarRepresent pit ash content；W represents alkali in coal chemical industry saline sewage Metal salt mass fraction.
When only consider Slagging risk obtain with Na2O+0.5K2O is alkali metal salt in the penetrating saline sewage of composition Maximum level is calculated with following formula:
③
Sodium salt equivalent S=Na in ash2O+0.5K2O (%)；The computational methods of sodium salt limit fixed value in coal：
R=(A-BVdaf)(Na2O+CK2O)<Rlimt ④
Coal ash sodium salt limiting value is Slimit=Rlimit/(A-BVdaf) (%)；mcoalFor boiler coal consumption；R is sodium salt in coal Limit fixed value；RlimitFor the limiting value of sodium salt limit fixed value in coal, when R is higher than RlimitWhen, it is believed that sodium salt exceedes most in coal Big crystallized ability, the coal ash will have dust stratification contamination problems in boiler operatiopn.
Constant A, B are to weigh coal to influence sodium salt fixed pole limit value the model parameter of size；C is to weigh K2O is to sodium salt The equivalent constant that fixed pole limit value influences；VdafFor dry ash free basis volatile matter content；Na2O and K2O represents both oxidations respectively Thing mass fraction shared in coal ash.
In above-mentioned technical proposal, the mode that the saline sewage after concentration sprays into burner hearth is：To CFBB, from stove Top or Secondary Air are highly located concentration saline sewage spraying into burner hearth；To pulverized-coal fired boiler, from secondary air bellow top or burnt wind Lower section will concentrate saline sewage and spray into burner hearth.
The present invention has advantages below and high-lighting effect：1. the present invention is under conditions of safe operation of the boiler is ensured by coal Chemical industry saline sewage sprays into boiler, and each type organic in saline sewage and a large amount of is effectively disposed in high-temp combustion environment Inorganic salts, it is practical so as to solve the scale process problem of saline sewage；2. the present invention is not influenceing boiler normal operation Performance and boiler thermal output decline it is acceptable in the case of, greatly reduce coal chemical industry sewage processing cost good economy performance；③ This method considers the Slagging risk of Boiler Mixed Burning initiation, chlorine corrosion risk and experimental data, finally gives different dense The saline sewage maximum straying quatity of degree, there is good theoretical foundation；4. coal chemical industry saline sewage processing method is provided, according to Actual conditions, selection spray into the saline sewage that salt concentration is at least 5%, and method is simple and easy；5. it is small to boiler improvement, it is daily Maintenance of equipment and replacing are convenient, and operating cost is low.
Brief description of the drawings
Fig. 1 is provided by the invention using high saliferous softened water as the structure diagram of the Natural Circulation injection boiler to feed water.
1-saline sewage concentrator；2-water pump；3-flow valve；4-the first atomizer；5-the second atomization spray Mouth；6-boiler.
Embodiment
Principle, concrete structure and the preferred forms of the present invention are further illustrated below in conjunction with the accompanying drawings.
Coal chemical industry sewage is injected directly into boiler, the concentration saline sewage that concentrated equipment 1 obtains passes through water pump 2 and flow Valve 3 sprays into the concentration saline sewage of certain flow in boiler 6 by the first atomizer 4 or the second atomizer 5, according to reality Border situation, it may be selected to spray into the saline sewage that salt concentration is not less than 5%, concentration saline sewage sprays into burner hearth position according to boiler Type and actual demand arrangement, to CFBB, concentration saline sewage is sprayed at furnace roof or Secondary Air height Burner hearth；To pulverized-coal fired boiler, concentration saline sewage is sprayed into burner hearth below secondary air bellow top or burnt wind.It is dirty to concentrate saliferous Water, which sprays into burner hearth position, arrangement or many places arrangement and to be not limited to proposed position at one.
Coal chemical industry saline sewage maximum straying quatity is by being calculated.Coal chemical industry saline sewage treating capacity is mainly by alkali metal Content restricts, and analyzes alkali metal occurrence form in saline sewage, is 3. 4. calculated with Na with formula by formula2O+0.5K2O is composition Spray into alkali metal salt limit content m in saline sewagesalt, consider contamination, chlorine corrosion and experimental data and obtain boiler penetrating Alkali metal salt limit content M in saline sewagesalt, the saline sewage maximum spouts of various concentrations is calculated by alkali metal salt concentration Enter amount, calculating process is as follows：
The saline sewage maximum straying quatity of various concentrations：
Q=Msalt/w ①
In formula:
Msalt=min (Csmsalt,0.003mcoalCcl,0.0148Aarmcoal) ②
Wherein, Q is coal chemical industry saline sewage maximum straying quatity；MsaltTo consider contamination, chlorine corrosion and experimental data What is obtained sprays into the limit content of alkali metal salt in saline sewage；Cs=(N1/N2+0.5N3/N4),N1For Na2Na elements in O Mass fraction, N2Represent the Na element mass fractions in sodium salt, N in saline sewage3For K2The mass fraction of K element, N in O4Table Show the mass fraction of K element in sylvite in saline sewage；msaltOnly to consider that Slagging risk obtains with Na2O+0.5K2O For alkali metal salt maximum level in the penetrating saline sewage of composition；CCl=1/Ncl, wherein NClRepresent saline sewage in Cl elements with The ratio of alkali metal salt；mcoalRepresent steam coal consumption；AarRepresent pit ash content；W represents alkali in coal chemical industry saline sewage Metal salt mass fraction.
③
Sodium salt equivalent S=Na in ash2O+0.5K2O (%)；The computational methods of sodium salt limit fixed value in coal：
R=(A-BVdaf)(Na2O+CK2O)<Rlimt ④
Coal ash sodium salt limiting value is Slimit=Rlimit/(A-BVdaf) (%)；mcoalFor boiler coal consumption；R is sodium salt in coal Limit fixed value；RlimitFor the limiting value of sodium salt limit fixed value in coal, when R is higher than RlimitWhen, it is believed that sodium salt exceedes most in coal Big crystallized ability, the coal ash will have dust stratification contamination problems in boiler operatiopn.
Constant A, B are to weigh coal to influence sodium salt fixed pole limit value the model parameter of size；C is to weigh K2O is to sodium salt The equivalent constant that fixed pole limit value influences；VdafFor dry ash free basis volatile matter content；Na2O and K2O represents both oxidations respectively Thing mass fraction shared in coal ash.
A kind of method based on burning processing coal chemical industry saline sewage in stove provided by the invention, has practical, warp The features such as Ji property is good, has good theoretical foundation, and method is simple, and operating cost is low.Suitable for various concentration coal chemical industry saliferous The scale processing of sewage.

Claims (3)

  1. A kind of 1. method based on burning processing coal chemical industry saline sewage in stove, it is characterised in that:
    1) saline sewage is handled by concentrator (1), the saline sewage that salt concentration is at least 5% is formed, after concentration Saline sewage spray into burner hearth carry out mixing burning；
    2) the saline sewage maximum straying quatity of various concentrations is calculated：
    Q=Msalt/w ①
    In formula:
    Msalt=min (Csmsalt,0.003mcoalCcl,0.0148Aarmcoal) ②
    Wherein, Q is coal chemical industry saline sewage maximum straying quatity；MsaltConsider contamination, chlorine corrosion and experimental data to obtain Spray into the limit content of alkali metal salt in saline sewage；Cs=(N1/N2+0.5N3/N4),N1For Na2The quality of Na elements point in O Number, N2Represent the Na element mass fractions in sodium salt, N in saline sewage3For K2The mass fraction of K element, N in O4Represent saliferous In sewage in sylvite K element mass fraction；msaltOnly to consider that Slagging risk obtains with Na2O+0.5K2O is composition Penetrating saline sewage in alkali metal salt maximum level；CCl=1/Ncl, wherein NClRepresent Cl elements and alkali metal in saline sewage The ratio of salt；mcoalRepresent steam coal consumption；AarRepresent pit ash content；W represents alkali metal salt in coal chemical industry saline sewage Mass fraction.
  2. 2. according to a kind of based on the method that burning handles coal chemical industry saline sewage in stove described in claim 1, it is characterised in that：
    Sodium salt equivalent S=Na in ash2O+0.5K2O (%)；The computational methods of sodium salt limit fixed value in coal：
    R=(A-BVdaf)(Na2O+CK2O) ＜ Rlimt ④
    Coal ash sodium salt limiting value is Slimit=Rlimit/(A-BVdaf) (%)；mcoalRepresent steam coal consumption；R is sodium salt pole in coal Limit fixed value；RlimitFor the limiting value of sodium salt limit fixed value in coal；
    Constant A, B are to weigh coal to influence sodium salt fixed pole limit value the model parameter of size；C is to weigh K2O is to sodium salt fixed pole The equivalent constant that limit value influences；VdafFor dry ash free basis volatile matter content；Na2O and K2O represents both oxides in coal respectively Shared mass fraction in ash.
  3. 3. according to a kind of based on the method that burning handles coal chemical industry saline sewage in stove described in claim 1, it is characterised in that: The mode that saline sewage after concentration sprays into burner hearth is：, will be dense at furnace roof or Secondary Air height to CFBB Contracting saline sewage sprays into burner hearth；To pulverized-coal fired boiler, concentration saline sewage is sprayed into below secondary air bellow top or burnt wind Burner hearth.
CN201510969146.1A 2015-12-22 2015-12-22 A kind of method based on burning processing coal chemical industry saline sewage in stove Active CN105423312B (en)

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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
CN202660564U (en) * 2012-07-10 2013-01-09 上海禾子隆环保科技有限公司 Device for incinerating high concentration salt-contained waste liquid
CN103241886A (en) * 2013-05-20 2013-08-14 彭万旺 Treatment process of wastewater containing organic matters

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4316425B2 (en) * 2004-05-28 2009-08-19 中国電力株式会社 Thermal power plant operation method

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
CN202660564U (en) * 2012-07-10 2013-01-09 上海禾子隆环保科技有限公司 Device for incinerating high concentration salt-contained waste liquid
CN103241886A (en) * 2013-05-20 2013-08-14 彭万旺 Treatment process of wastewater containing organic matters

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