CN108870414A - A method of petrochemical industry waste liquid is burned based on gaseous fuel - Google Patents
A method of petrochemical industry waste liquid is burned based on gaseous fuel Download PDFInfo
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- CN108870414A CN108870414A CN201710338337.7A CN201710338337A CN108870414A CN 108870414 A CN108870414 A CN 108870414A CN 201710338337 A CN201710338337 A CN 201710338337A CN 108870414 A CN108870414 A CN 108870414A
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- petrochemical industry
- waste liquid
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- fuel
- gas
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Classifications
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/10—Supplementary heating arrangements using auxiliary fuel
- F23G2204/103—Supplementary heating arrangements using auxiliary fuel gaseous or liquid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a kind of methods for burning petrochemical industry waste liquid based on gaseous fuel, this method is that petrochemical industry waste liquid is sprayed into the combustion zone of salkali waste incinerator with atomised form, with fuel gas for combustion-supporting fuel, it burns under conditions of blasting oxygen-containing gas, control combustion zone temperature is 900~1200 DEG C；Petrochemical industry waste liquid and fuel gas inventory meet：Petrochemical industry waste liquid amount/salkali waste incinerator combustion zone burner hearth cross-sectional area=0.4~0.75t/hm per hour2, fuel tolerance/salkali waste incinerator combustion zone burner hearth cross-sectional area=0.10~0.135t/hm per hour2, this method may be implemented reasonable burning load, reduces processing cost, reduce damage of the excessively high burning load to device, be conducive to the popularization and application of liquid waste incineration technology in the industry.
Description
Technical field
The present invention relates to a kind of processing methods of petrochemical industry waste liquid, relate more specifically to a kind of using gas fuel pair
In the incineration treatment method of cyclohexanone waste alkali, technical field of petrochemical industry.
Background technique
Petrochemical industry such as cyclohexane oxidation prepares cyclohexanone industrial process and generates a large amount of organic spent lye of high concentration,
Making its processing up to standard was once the environmentally friendly bottleneck that the sector expands energy.The nineties latter stage in last century, the success of middle petrochemical industry Ba Ling company
The salkali waste incineration technology based on alkali collection oven process is developed, meets National Environmental discharge standard after there is COD removal rate height, processing
The advantages that, gradually become cyclohexanone saponification salkali waste and handle mainstream technology, the overwhelming majority is newly-built at home in recent years or changes expansion
Application is put into the cyclohexanone project built.
The limitation that cyclohexanone waste alkali incinerator is supplied for cost consideration and fuel, auxiliary fuel source is complicated, kind
Class is more, is generally used industry byproduct or its deep processed product, and ingredient, Lower heat value often change, and it is steady to influence boiler
Fixed burning and operating cost；Byproduct steam price adjustment also influences performance driving economy.Moreover, the fuel type used is supplied
It should restrict, be forced that fuel oil and gaseous fuel all can be applied in combination sometimes with fuel oil sometimes, it sometimes but can only be complete
The variation of portion's using gas fuel, fuel supply causes the fluctuation of liquid waste incineration cost, brings problem to installation cost control.
Therefore, the variation of fuel supply is coped with by process innovation, is reduced processing cost and is essential as the urgent of chemical waste liquid incinerator
It asks.
Have using alkali recovery furnace mode burning disposal salkali waste technology, such as Chinese patent CN97108274.X " caprolactam
The method and its equipment of saponification waste lye burning disposal recycling soda ash ", discloses at a kind of caprolactam saponification waste lye burning
The method and apparatus of reason recycling soda ash, saponification waste lye spray into high-temperature burner hearth after passing through jet atomization, it is dry in burner hearth, point
Solution is collected to electrostatic precipitator with flue gas, falls under 20~40% wherein 60~80% react generation sodium carbonate in burner hearth
Furnace bottom, burns in furnace bottom, generates melt sodium carbonate, flows into dissolving tank through scraper-trough conveyer tank, forms liquid alkaline.The technology fuel source by
Limit can only using gas fuel, be used for salkali waste burning disposal when, the problem is that：Fuel gas fuel is only used to fire as boiler
It is unreasonable to fuel ratio control when material, in the case of fuel gas usage amount is big and imperfect combustion, cause combustion zone temperature super
Easily there is water screen tube damage in high technology requirement, the problems such as fusant hardened blocking exhaust gases passes occurs in water-cooling screen；Work as fuel gas
Inadequate to the burning conversion ratio of waste liquid when usage amount deficiency, environmental requirement is not achieved in boiler efficiency decline, liquid waste processing.Do not conform to
The problems such as processing compound of reason causes device fluctuation of operating conditions, driving cycle time, salkali waste processing cost is high, seriously affects enterprise
Come into operation the enthusiasm of environmental protecting device, is unfavorable for the environmental emission reduction of chemical industry.
Summary of the invention
In view of the defects existing in the prior art, the purpose of the invention is to provide one kind to pass through regulating gas fuel and stone
Oily chemical waste liquid realizes reasonable burning load, reduces processing cost, reduce excessively high burning load to device to rational proportion
The method of the burning petrochemical industry waste liquid of damage overcomes gaseous fuel in the prior art and is asked using unreasonable technology is matched
Topic, solves the problems, such as that petrochemical industry salkali waste environmental pollution and processing cost are high in the prior art.
In order to achieve the above technical purposes, the present invention provides a kind of sides that petrochemical industry waste liquid is burned based on gaseous fuel
Method, using salkali waste incinerator burn petrochemical industry waste liquid, the salkali waste incinerator be alkali recovery furnace, including water-cooling wall, water-cooling screen,
Evaporate tube panel, drum, economizer and air preheater；The heat institute that the petrochemical industry waste liquid and fuel gas burning generate
The furnace water of salkali waste incinerator is stated, byproduct steam is generated；Petrochemical industry waste liquid is sprayed into the burning of salkali waste incinerator with atomised form
Area, with fuel gas be combustion-supporting fuel, burn under conditions of blasting oxygen-containing gas, control combustion zone temperature be 900~
1200℃；Petrochemical industry waste liquid and fuel gas inventory meet：Petrochemical industry waste liquid amount/salkali waste incinerator combustion zone furnace per hour
Thorax cross-sectional area=0.4~0.75t/hm2, per hour fuel tolerance/salkali waste incinerator combustion zone burner hearth cross-sectional area=
0.10~0.135 t/hm2。
Preferred scheme, the pressure that the fuel gas enters salkali waste incinerator is 50~200kPa.Fuel gas passes through contraction
Nozzle enters boiler combustion, and under preferred pressure conditions, gaseous fuel can be sufficiently mixed combustion with petrochemical industry waste liquid and oxygen
It burns, reaches good combustion efficiency.
More preferably scheme, the low-burning calorific value of the fuel gas are 31260~37840kj/kg.
Preferred scheme, the fuel gas are at least one of oil refinery dry gas, natural gas, coal bed gas.
Preferred scheme, the pressure that the petrochemical industry waste liquid enters salkali waste incinerator is 1.4~2.8MPa.In the pressure
Good atomizing effect can be obtained by acting on lower petrochemical industry waste liquid, keep petrochemical industry spent lye dispersion degree high, thus with auxiliary
Fuel and oxygen are sufficiently mixed burning, reach good combustion efficiency.
More preferably scheme, the petrochemical industry waste liquid be cyclohexanone waste alkali, solid content lower calorific value be 10000~
14000kJ/kg, solid quality degree are 30~60%.
The heat generated after preferred scheme, the petrochemical industry waste liquid and fuel gas burning is burnt for heating salkali waste
Burn the furnace water of furnace, byproduct steam.
Preferred scheme, the salkali waste incinerator smoke outlet connection electric precipitator, the interior burning come out of salkali waste incinerator
Ash deposits recycling or electric precipitator trapping recycling with flue gas to salkali waste incinerator tail portion.
Preferred scheme, petrochemical industry waste liquid and fuel gas inventory meet：Petrochemical industry waste liquid amount/salkali waste per hour
Incinerator combustion zone burner hearth cross-sectional area=0.5~0.65 ton/(hour × square metre), and gaseous fuel quantity/useless per hour
0.11~0.125 ton of alkali incinerator combustion zone burner hearth cross-sectional area/(hour × square metre).
Oxygen-containing gas of the invention is air or oxygen.
Salkali waste incinerator of the invention includes water-cooling wall, water-cooling screen, evaporation tube panel, drum, economizer and air preheater.
Salkali waste incinerator combustion zone burner hearth is rectangular or squarish.The intracorporal lower part of furnace of the salkali waste incinerator is equipped with two groups
Burner is equipped with petrochemical industry waste liquid injector between two groups of burners.Salkali waste incinerator bottom is equipped with scraper-trough conveyer tank.Combustion
Material air gun is arranged close to burner hearth bottom position.
Compared with the prior art, technical solution of the present invention bring beneficial effect：
1) technical solution of the present invention is by strict control petrochemical industry waste liquid and fuel gas inventory ratio, in only gas
Fuel is for that at once, can enable to reach reasonable combustion intensity when the petrochemical industries liquid waste incineration such as cyclohexanone waste alkali, avoid combustion
Burn the even flame-out parking problem of the raw tail gas pollution of load low yield, solve burning load it is excessively high caused by energy dissipation and equipment
The problem of service life reduces, can be substantially reduced the burning disposal cost of petrochemical industry waste liquid, make liquid waste incineration environmental protecting device
Environment-friendly function can reliably be played while can be conducive to push away on a large scale in the whole industry with low cost or even secondary operation cost
Wide application.
2) by being obtained using pilot production：In terms of 100,000 tons/year of Cyclohexanone Production scale, using the technology of the present invention side
About 9.5 ten thousand tons/year of case Treatment of Cyclohexanone spent lye, compared with original technology, 60~107 yuan/ton of processing cost can be reduced, is tired out
Meter is very prominent to the reduction cost effectiveness of environmental protecting device up to 570~10,000,000 yuan/year.As cost in the prior art is respectively-
77 yuan/t salkali waste and -94 yuan/t salkali waste, are calculated as about -731.5 ten thousand yuan/year, -921 ten thousand yuan/year.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, actual conditions are not specified in embodiment
Person, according to normal conditions or usually used condition of the same trade carries out.
Certain 10 10,000 tons cyclohexanone salkali waste incinerator, including water-cooling wall, water-cooling screen, evaporation tube panel, drum, economizer and
Air preheater etc., rectangular combustion chamber is made of water-cooling wall having a size of 3.85 meters × 3.85 meters, liquid waste incineration treatment process side
Method is：
Saponification waste lye is sent into saponification liquor spray gun after being forced into 1.8~2.5MPa, alkali recovery boiler is entered after atomization, in furnace
Interior suspension drying, space combustion (suspension combustion).Organic acid sodium salt in saponification liquor is converted to Na2CO3, and big calorimetric is released in reaction
Amount.
Auxiliary fuel gas after gas buffer tank pressure stabilizing, then by the pressure stabilizing of burning line loop modulation to 50~
200kPa, then spray into furnace and burn through fuel air gun.
The ash that burns is deposited with flue gas to boiler tail or is trapped by electric precipitation and recycles, and is delivered to ash bucket by scrapper conveyor and is wrapped again
Dress is outer to be sold, and the main ingredient for recycling ash is sodium carbonate.Biggish particle has little time to burn in furnace cavity, falls on furnace bottom bed course
Upper after-flame (bed course burning).The sodium carbonate fusion object of generation is flowed out from salkali waste burning boiler bottom scraper-trough conveyer mouth, is entered through scraper-trough conveyer tank
To solid caustic soda recovery unit, salnatron byproduct is obtained.Flue gas introduces the chimney emptying of 80m high.
The institute of combustion reaction in furnace thermal discharge, it is heated in lower economizer, upper economizer, upper drum, boiling tube panel, lower drum etc.
The steam that soft water generates 1.27MPa is heated in face, and in addition to using by oneself on a small quantity for the present apparatus, remaining is incorporated to low-pressure steam pipe network outside battery limit (BL).
Used fuel gas fuel is the one or more of oil refinery dry gas, natural gas and coal bed gas, is with oil refinery dry gas
Example, has the following properties that：
Dry gas property：
| Ingredient names | Maximum value | Minimum value | Average value |
| Density | 0.81 | 0.88 | 0.85 |
| Low-burning calorific value, kj/kg | 37840 | 31260 | 34550 |
The chemical waste liquid of institute's burning disposal is that cyclohexanone is saponified salkali waste, is had the following properties that：
Cyclohexanone salkali waste property：
| Ingredient names | Maximum value | Minimum value | Average value |
| Density | 1310 | 1180 | 1240 |
| Solid content | 65% | 35% | 43% |
| Low-burning calorific value, kj/kg | 11520 | 13260 | 12110 |
Effect of the invention can be matched by embodiment 1, embodiment 2, embodiment 3 and the technique of comparative example 1, comparative example 2
It is relatively better illustrated, be see the table below than condition and corresponding variable cost situation：
In table, ton salkali waste handles variable cost=consumption value (clear water+electricity+soft water+residual oil)-by-product value (low pressure steaming
Vapour), it is hereafter also identical.
The embodiment of the present invention 1,2,3 reduces salkali waste burning disposal cost up to 60~107 compared with comparative example 1,2
Yuan/ton.
Above embodiments are only exemplary embodiment of the present invention, are not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (7)
1. a kind of method for burning petrochemical industry waste liquid based on gaseous fuel burns petrochemical industry waste liquid using salkali waste incinerator,
The salkali waste incinerator is alkali recovery furnace, including water-cooling wall, water-cooling screen, evaporation tube panel, drum, economizer and air preheater；
The furnace water for the heat salkali waste incinerator that the petrochemical industry waste liquid and fuel gas burning generate, generates byproduct steam；It is special
Sign is：The combustion zone that petrochemical industry waste liquid is sprayed into salkali waste incinerator with atomised form, with fuel gas for combustion-supporting fuel, in drum
Enter and burn under conditions of oxygen-containing gas, control combustion zone temperature is 900~1200 DEG C；Petrochemical industry waste liquid and fuel gas are thrown
Doses meets simultaneously：Petrochemical industry waste liquid amount/salkali waste incinerator combustion zone burner hearth cross-sectional area=0.4~0.75t/ per hour
h·m2, fuel tolerance/salkali waste incinerator combustion zone burner hearth cross-sectional area=0.10~0.135t/hm per hour2。
2. the method according to claim 1 for burning petrochemical industry waste liquid based on gaseous fuel, it is characterised in that：The combustion
The pressure that material gas enters salkali waste incinerator is 50~200kPa.
3. the method according to claim 2 for burning petrochemical industry waste liquid based on gaseous fuel, it is characterised in that：The combustion
The low-burning calorific value for expecting gas is 31260~37840kj/kg.
4. the method according to claim 3 for burning petrochemical industry waste liquid based on gaseous fuel, it is characterised in that：The combustion
Material gas is at least one of oil refinery dry gas, natural gas, coal bed gas.
5. the method according to any one of claims 1 to 4 for burning petrochemical industry waste liquid based on gaseous fuel, feature exist
In：The pressure that the petrochemical industry waste liquid enters salkali waste incinerator is 1.4~2.8MPa.
6. the method according to claim 5 for burning petrochemical industry waste liquid based on gaseous fuel, it is characterised in that：The stone
Oily chemical waste liquid is cyclohexanone waste alkali, and solid content lower calorific value is 10000~14000kJ/kg, solid quality percentage
Content is 30~60%.
7. according to claim 1~4,6 described in any item methods for burning petrochemical industry waste liquid based on gaseous fuel, feature
It is：Salkali waste incinerator smoke outlet connection electric precipitator, the burning ash come out in salkali waste incinerator is with flue gas to useless
The deposition recycling of alkali incinerator tail portion or electric precipitator trapping recycling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338337.7A CN108870414B (en) | 2017-05-15 | 2017-05-15 | Method for incinerating petrochemical waste liquid based on gas fuel |
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|---|---|---|---|
| CN201710338337.7A CN108870414B (en) | 2017-05-15 | 2017-05-15 | Method for incinerating petrochemical waste liquid based on gas fuel |
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| CN108870414A true CN108870414A (en) | 2018-11-23 |
| CN108870414B CN108870414B (en) | 2020-12-22 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3946077A (en) * | 1973-03-28 | 1976-03-23 | Bayer Aktiengesellschaft | Process for oxidating hydrocarbons |
| CN1424535A (en) * | 2002-12-20 | 2003-06-18 | 巨化集团公司 | Combustion nozzle for cyelohexanone saponified waste water |
| CN101734824A (en) * | 2008-11-04 | 2010-06-16 | 王富绩 | Process for treating saponifiable waste alkali liquor by chemical method |
| CN102192513A (en) * | 2011-05-25 | 2011-09-21 | 大连科林能源工程技术开发有限公司 | Incinerator of multi-element multi-dimension chemical hazardous waste |
| CN102877351A (en) * | 2011-07-15 | 2013-01-16 | 中国石油化工集团公司 | Treatment method of high concentration waste alkali solution |
| CN103591591A (en) * | 2013-11-06 | 2014-02-19 | 武汉锅炉集团工程技术有限公司 | Saponification waste liquid combustion and alkali recovery boiler |
| CN103822216A (en) * | 2014-03-18 | 2014-05-28 | 江苏星瑞化工工程科技有限公司 | Incineration method for saliferous organic mixed effluent |
-
2017
- 2017-05-15 CN CN201710338337.7A patent/CN108870414B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3946077A (en) * | 1973-03-28 | 1976-03-23 | Bayer Aktiengesellschaft | Process for oxidating hydrocarbons |
| CN1424535A (en) * | 2002-12-20 | 2003-06-18 | 巨化集团公司 | Combustion nozzle for cyelohexanone saponified waste water |
| CN101734824A (en) * | 2008-11-04 | 2010-06-16 | 王富绩 | Process for treating saponifiable waste alkali liquor by chemical method |
| CN102192513A (en) * | 2011-05-25 | 2011-09-21 | 大连科林能源工程技术开发有限公司 | Incinerator of multi-element multi-dimension chemical hazardous waste |
| CN102877351A (en) * | 2011-07-15 | 2013-01-16 | 中国石油化工集团公司 | Treatment method of high concentration waste alkali solution |
| CN103591591A (en) * | 2013-11-06 | 2014-02-19 | 武汉锅炉集团工程技术有限公司 | Saponification waste liquid combustion and alkali recovery boiler |
| CN103822216A (en) * | 2014-03-18 | 2014-05-28 | 江苏星瑞化工工程科技有限公司 | Incineration method for saliferous organic mixed effluent |
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