CN103591591A - Saponification waste liquid combustion and alkali recovery boiler - Google Patents
Saponification waste liquid combustion and alkali recovery boiler Download PDFInfo
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- CN103591591A CN103591591A CN201310544936.6A CN201310544936A CN103591591A CN 103591591 A CN103591591 A CN 103591591A CN 201310544936 A CN201310544936 A CN 201310544936A CN 103591591 A CN103591591 A CN 103591591A
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a saponification waste liquid combustion and alkali recovery boiler. The saponification waste liquid combustion and alkali recovery boiler comprises a hearth, air inlet channels are formed in the lower portion of the hearth, the wall, between the air inlet channels, of the hearth is provided with a waste liquid spray gun, an auxiliary burner is arranged below the waste liquid spray gun, the bottom of the hearth is connected with a molten bath, an exhaust outlet of the hearth is connected with an air preheater, and an exhaust port of the air preheater is connected with the air inlet channels. Due to the fact that the structure of the air preheater is additionally arranged, the temperature of the air entering the boiler is increased, it is guaranteed that the temperature of the air entering the boiler is not lower than 250 DEG C, and the combustion ratio of the saponification waste liquid is still guaranteed on the premise of reducing a set of auxiliary combustors. Due to the fact that the structure of a steam pocket and the structure of a steam superheater are used for heating the steam and the structure of combined heat and power generation is introduced, the use ratio of the fuel is guaranteed. The temperature of the exhaust smoke is reduced through an economizer, the boiler fed water is heated, and energy sources are further saved. The saponification waste liquid combustion and alkali recovery boiler is reasonable in structural design, the utilization ratio of the resources is improved by 10%, the continuous operation period of the boiler is prolonged by more than one time, and the consumption of auxiliary fuel is reduced by more than 50%.
Description
Technical field
The present invention relates to chemical waste liquid pollutant control technical field, be specifically related to a kind of saponification waste liquid burning and alkali recovery boiler.
Technical background
Since the nineties in 20th century, world's caprolactam consumption is with approximately 2% average annual speed increment, and domestic caprolactam consumption figure is with average annual 16% speed increment.2010, the apparent consumption of domestic caprolactam reached 1,120,000 tons, and 2011, domestic caprolactam apparent consumption amount reached 1,200,000 tons, estimated that the output to 2014 of China's caprolactam is year by the scale that reaches 1,250,000 tons.
In the production process of caprolactam, can produce a kind of organic saponification waste liquid, its chemical constituent is complicated organic acid sodium salt, not only contains a large amount of callable materials, and is a kind of reluctant organic wastewater.If do not add pretreatment, directly send into sewage treatment plant, not only wasted ample resources, increased the weight of environmental pollution, also increased the weight of the load of sewage treatment plant, obviously do not reach the requirement of cleaner production simultaneously.The BOD of saponification waste liquid, COD and pH value are higher, if directly discharge will cause serious environmental pollution, if adopt local method burning disposal, method is original, and air pollution is serious, very serious on the impact of ecological environment around.
Saponification waste liquid water content approximately 50% after concentrated, can be by companion's oil firing or natural pneumatic transmission boiler combustion.And current used boiler is for guaranteeing burning quality, conventionally at boiler bottom, double-deck auxiliary burner (as patent CN1215696A) is set, but thus, will consumes more auxiliary fuel, and can cause boiler tail dust stratification serious, shorten the cycle that equipment moves continuously.
Summary of the invention
The present invention is exactly for above-mentioned technical problem, and a kind of saponification waste liquid burning and alkali recovery boiler are provided, and this boiler is better for the combustion efficiency of saponification waste liquid, and has effectively reduced the consumption of auxiliary fuel.
For realizing this object, saponification waste liquid burning and alkali recovery boiler that the present invention is designed, comprise burner hearth, lower furnace portion offers air intake passage, thorax wall between air intake passage is provided with waste liquid spray gun, and waste liquid spray gun below is provided with auxiliary burner, and burner hearth bottom is connected with molten bath, it is characterized in that: the exhaust opening of described burner hearth is connected with air preheater, the exhaust outlet of air preheater connects air intake passage.
Further, described air intake passage comprises air channel one time, secondary air duct and tertiary air road, wherein, one time air channel is circumferentially opened on the thorax wall of burner hearth bottom, on relative both sides, the front and back thorax wall in top, air channel, offer secondary air duct, on relative both sides, the front and back thorax wall in secondary air duct top, offer tertiary air road.
Further, the air inlet of the secondary air duct of both sides, described front and back is crisscross arranged, and the air inlet in the tertiary air road of both sides, described front and back is crisscross arranged.
Further, between described secondary air duct and tertiary air road, be provided with waste liquid spray gun, waste liquid spray gun is evenly fixed on circumferential thorax wall.
Further, described auxiliary burner is fixed on relative both sides thorax wall, and auxiliary burner is arranged on the thorax wall between air channel and secondary air duct; Or auxiliary burner is fixed on relative both sides thorax wall, and auxiliary burner and an air channel are positioned at same plane.
Further, described thorax wall is fin panel casing, and thorax wall surface is coated with insulation material, on the thorax wall of roof of the furnace, is fixed with drum.
Further, described drum below is provided with steam superheater, and steam superheater is fixed on the exhaust opening place of burner hearth.
Further, the exhaust opening of described steam superheater connects the mouth that enters of air preheater, and the exhaust opening of air preheater is connected with economizer.
Further, the exhaust outlet of described air preheater connects air channel and secondary air duct by admission line.
The invention has the beneficial effects as follows: 1. arrange after air preheater, can effectively improve the temperature into stove combustion air, guarantee that the burning of saponification waste liquid in boiler is complete, make saponification waste liquid flameholding, reduce boiler load, be conducive to the consumption that improves boiler thermal output and reduce auxiliary fuel.2. after air preheater, arrange that economizer can effectively reduce exhaust gas temperature, reduce the heat loss of smoke evacuation, improve boiler thermal output.3. arrange steam superheater, effectively improved vapor (steam) temperature, superheated steam is introduced to steam turbine, carry out cogeneration of heat and power, further improved efficiency of energy utilization.4. air stage feeding meets the basic principle of burning, and what be conducive to air feed system stablizes and facilitate adjusting.5. air channel and secondary air duct are arranged in saponification waste liquid spray gun bottom, and can be incineration of liquor provides sufficient oxygen ，Jiang combustion centre to be controlled at lower furnace portion, have improved the stability of burning, have further reduced the consumption of auxiliary fuel.6. an air channel is evenly arranged on the thorax wall of four sides, has guaranteed the stable of burner hearth bottom bed course, and the carbon after the dry cracking of waste liquid is fully burnt.Secondary Air is sent into from front-back wall is staggered, has guaranteed air, and the abundant mixing of flue gas and black liquor particle, upsets rising flue gas, improves turbulivity, and overheavy firing is evenly distributed flue gas in burner hearth, improves the uniformity of the maximum section of passenger flows such as temperature field.Tertiary air is used for burning fuel gas, and tertiary air road adopts front-back wall to arrange, can make tertiary air fully mix with high-temperature flue gas, guarantees that the fuel gas residual in Secondary Air region burns completely and reduce carry-over loss at this, reduces the dust stratification of back-end surfaces.7. good stove internal combustion aerodynamic field can effectively reduce the phosphorus content in the melting sode ash that furnace bottom flows out, and reduces flying dust and carries, and has improved boiler time of operation continuously.8. the sode ash most of (more than 60%) that incineration of liquor generates drops to furnace bottom, at furnace bottom, forms sodium carbonate high temperature molten bath, has increased the amount of stored heat of lower furnace portion, has improved the stability of incineration of liquor.9. auxiliary burner is arranged in the bottom of hearth combustion, can provide sufficient thermal source for incineration of liquor, is conducive to drying and burning and the after-flame of waste liquid drop.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of boiler in the present invention;
Wherein, 1-burner hearth, 2-waste liquid spray gun, 3-auxiliary burner, 4-molten bath, 5-air preheater, 6-air channel, 7-secondary air duct, 8-tertiary air road, 9-thorax wall, 10-air inlet, 11-drum, 12-steam superheater, 13-economizer, 14-exhaust outlet, 15-admission line.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is done further and is described in detail:
Saponification waste liquid burning and alkali recovery boiler as shown in Figure 1, comprise burner hearth 1, burner hearth 1 bottom offers air intake passage, thorax wall 9 between air intake passage is provided with waste liquid spray gun 2, waste liquid spray gun 2 belows are provided with auxiliary burner 3, burner hearth 1 bottom is connected with molten bath 4, and the exhaust opening of described burner hearth 1 is connected with air preheater 5, and the exhaust outlet 14 of air preheater 5 connects air intake passage.At boiler tail, arrange air preheater 5, more than entering stove air heat to 250 ℃, improved the stability of saponification waste liquid burning.
In technique scheme, described air intake passage comprises air channel 6 one time, secondary air duct 7 and tertiary air road 8, wherein, one time air channel 6 is circumferentially opened on the thorax wall 9 of burner hearth 1 bottom, on relative both sides, the front and back thorax wall 9 in 6 tops, an air channel, offer secondary air duct 7, on relative both sides, the front and back thorax wall 9 in secondary air duct 7 tops, offer tertiary air road 8.
In technique scheme, the air inlet of the secondary air duct 7 of both sides, described front and back is crisscross arranged, and the air inlet in the tertiary air road 8 of both sides, described front and back is crisscross arranged.Three layers of air feed are set, air channel 6 and secondary air duct 7 are set in waste liquid spray gun 2 bottoms, tertiary air road 8 is arranged in waste liquid spray gun 2 tops, and wherein wind and Secondary Air adopt hot-air, and tertiary air adopts cold air.The air outlet in an air channel 6 is evenly arranged on the four sides of burner hearth 1 bottom thorax wall 9; The air outlet of secondary air duct 7 is arranged between air channel 6 and waste liquid spray gun 2, front-back wall interlaced arrangement, and the air inlet of the secondary air duct 7 of both sides is positioned at same plane, but axis does not overlap; The air outlet in tertiary air road 8 is arranged in the top 1000mm～2000mm of waste liquid spray gun 2, front-back wall interlaced arrangement, and the air outlet in the tertiary air road 8 of both sides is positioned at same plane, but axis does not overlap.Because secondary air duct 7 and tertiary air road 8 are all crisscross arranged, further increased the turbulent extent of place, air port air, contribute to the burning of waste liquid, further improved the efficiency of combustion of waste liquid.
In technique scheme, between described secondary air duct 7 and tertiary air road 8, be provided with waste liquid spray gun 2, waste liquid spray gun 2 is evenly fixed on circumferential thorax wall 9.Waste liquid spray gun 2 adopts mechanical pressure type, makes Waste liquid atomization become fine drop, improves the contact area of drop and burner hearth 1 interior high-temperature flue gas, improves burning condition.
In technique scheme, described auxiliary burner 3 is fixed on relative both sides thorax wall 9, and auxiliary burner 3 is arranged on the thorax wall 9 between air channel 6 and secondary air duct 7; Or auxiliary burner 3 is fixed on relative both sides thorax wall 9, and auxiliary burner 3 and an air channel 6 are positioned at same plane.Auxiliary burner 3 is arranged near an air channel 6, adopts individual layer to be arranged symmetrically with, and for saponification waste liquid is dry and burning provides hot environment, auxiliary fuel can adopt the exotic fuels such as oil, natural gas.
In technique scheme, described thorax wall 9 is fin panel casing, and thorax wall 9 surface coverage have insulation material, on the thorax wall 9 at burner hearth 1 top, is fixed with drum 11.Utilize fin panel casing and drum 11 to produce steam, utilize steam to carry out cogeneration of heat and power, further increased the utilization rate of the energy.
In technique scheme, described drum 11 belows are provided with steam superheater 12, and steam superheater 12 is fixed on the exhaust opening place of burner hearth 1.Steam superheater 12 is arranged in outlet at burner hearth 1, and superheated steam is introduced to steam turbine, carries out cogeneration of heat and power.
In technique scheme, the exhaust opening of described steam superheater 12 connects the mouth that enters of air preheater 5, and the exhaust opening of air preheater 5 is connected with economizer 13.By the high-temperature flue gas after burning, to entering the air of stove, heat, further effectively utilized the energy.At the horizontal steel tube economizer of the rear layout one-level of air preheater 5, when exhaust gas temperature is dropped to 180 ℃, also the feedwater in boiler is heated, reasonable in design, energy utilization rate is high.
In technique scheme, the exhaust outlet 14 of described air preheater 5 is by admission line 15 air channel 6 of connection and secondary air ducts 7.Guaranteed the stable of air channel 6 and secondary air duct 7 temperature, the cyclic utilization rate of heat energy is high.
The course of work of the present invention is: saponification waste liquid is atomized into fine drop by waste liquid spray gun 2, evenly be sprayed on the cross section of burner hearth 1, drop is heated by the hyperthermia radiation of furnace bottom sodium carbonate high temperature molten bath and auxiliary burner 3 in dropping process, reaching after uniform temperature the hot blast of sending burner hearth 1 to secondary air duct 7 with air channel 6 contacts and takes fire, generate flue gas and sode ash, most of sode ash is fallen in the molten bath 4 of furnace bottom, liquid state discharges out of the furnace, the flue gas of after-flame does not further react with the cold wind in tertiary air road 8 in uphill process completely, combustible component is decomposed completely, the water-cooling wall of burner hearth 1 absorbs calory burning water is heated into steam water interface, in drum 11, carry out carbonated drink separation, isolated steam enters steam superheater 12, after the heat of vapor absorption high-temperature flue gas further heats up, be sent to steam turbine, for cogeneration of heat and power, high-temperature flue gas is discharged from after steam superheater 12, enters back-end surfaces, heats into stove air, thereby reduced flue-gas temperature, improved the temperature that enters stove air in air preheater 5, flue gas enters economizer 13 heating boiler feedwater from air preheater 5 is discharged, and improves efficiency of energy utilization, and exhaust gas temperature is reduced to 180 ℃.Burner hearth 1 is that air and saponification waste liquid mix the main combustion zone reacting, and the four sides wall of burner hearth 1 consists of fin panel casing, and insulation layer in outside covers, to reduce radiation loss; Steam superheater 12 is panelized construction, is conducive to deashing; Drum 11 is arranged in boiler front upper part, is not subject to sweep of gases, separated for carbonated drink; Air preheater 5 is plank frame, and this structure can be conducive to deashing, and 5 grades of air preheater 5 operated by rotary motion, are heated to air themperature more than 250 ℃; Economizer 13 adopts horizontal type structure in-line arrangement, can reduce arrangement space and be beneficial to deashing, and economizer 13 can further reduce flue-gas temperature, makes exhaust gas temperature reach 180 ℃, improves efficiency of energy utilization; Annular passage or П type air channel that the cross section that air channel 6, secondary air duct 7 and a tertiary air road 8 form for carbon steel Plate Welding is rectangle, Main Function is that burning air feed is distributed to each for air port, and makes the allocation of the amount of air in each air port even as far as possible.The present invention can effectively improve saponification waste liquid combustion stability, improves efficiency of energy utilization 10%, extends the continuous cycle of operation more than 1 times, reduces auxiliary fuel and consumes more than 50%.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any those of ordinary skill in the art are in the disclosed technical scope of the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (10)
1. a saponification waste liquid burns and alkali recovery boiler, comprise burner hearth (1), burner hearth (1) bottom offers air intake passage, thorax wall (9) between air intake passage is provided with waste liquid spray gun (2), waste liquid spray gun (2) below is provided with auxiliary burner (3), burner hearth (1) bottom is connected with molten bath (4), it is characterized in that: the exhaust opening of described burner hearth (1) is connected with air preheater (5), and the exhaust outlet (14) of air preheater (5) connects air intake passage.
2. a kind of saponification waste liquid as claimed in claim 1 burns and alkali recovery boiler, it is characterized in that: described air intake passage comprises an air channel (6), secondary air duct (7) and tertiary air road (8), wherein, an air channel (6) is circumferentially opened on the thorax wall (9) of burner hearth (1) bottom, on relative both sides, the front and back thorax walls (9) in an air channel (6) top, offer secondary air duct (7), on relative both sides, the front and back thorax walls (9) in secondary air duct (7) top, offer tertiary air road (8).
3. a kind of saponification waste liquid burning as claimed in claim 2 and alkali recovery boiler, is characterized in that: the air inlet of the secondary air duct (7) of both sides, described front and back is crisscross arranged, and the air inlet in the tertiary air road (8) of both sides, described front and back is crisscross arranged.
4. a kind of saponification waste liquid burning as claimed in claim 3 and alkali recovery boiler, is characterized in that: between described secondary air duct (7) and tertiary air road (8), be provided with waste liquid spray gun (2), waste liquid spray gun (2) is evenly fixed on circumferential thorax wall (9).
5. a kind of saponification waste liquid as claimed in claim 1 burns and alkali recovery boiler, it is characterized in that: it is upper that described auxiliary burner (3) is fixed on relative both sides thorax walls (9), and auxiliary burner (3) is arranged on the thorax wall (9) between an air channel (6) and secondary air duct (7).
6. a kind of saponification waste liquid burning as claimed in claim 1 and alkali recovery boiler, it is characterized in that: it is upper that described auxiliary burner (3) is fixed on relative both sides thorax walls (9), and auxiliary burner (3) is positioned at same plane with an air channel (6).
7. a kind of saponification waste liquid burning and the alkali recovery boiler as described in claim 2 or 4 or 5 or 6, is characterized in that: described thorax wall (9) is fin panel casing, on the thorax wall (9) at burner hearth (1) top, is fixed with drum (11).
8. a kind of saponification waste liquid burning as claimed in claim 7 and alkali recovery boiler, is characterized in that: described drum (11) below is provided with steam superheater (12), and steam superheater (12) is fixed on the exhaust opening place of burner hearth (1).
9. a kind of saponification waste liquid burning as claimed in claim 8 and alkali recovery boiler, is characterized in that: the exhaust opening of described steam superheater (12) connects the mouth that enters of air preheater (5), and the exhaust opening of air preheater (5) is connected with economizer (13).
10. a kind of saponification waste liquid burning as claimed in claim 9 and alkali recovery boiler, is characterized in that: the exhaust outlet (14) of described air preheater (5) connects an air channel (6) and secondary air duct (7) by admission line (15).
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| CN201310544936.6A CN103591591B (en) | 2013-11-06 | 2013-11-06 | Saponification waste liquid burning and alkali recovery boiler |
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| CN201310544936.6A CN103591591B (en) | 2013-11-06 | 2013-11-06 | Saponification waste liquid burning and alkali recovery boiler |
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| CN103591591B CN103591591B (en) | 2016-08-17 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439862A (en) * | 2016-11-25 | 2017-02-22 | 上海第升环保科技有限公司 | Salt-containing waste liquid phased incineration treatment device and method |
| CN108870413A (en) * | 2017-05-15 | 2018-11-23 | 中国石油化工股份有限公司 | A method of petrochemical industry waste liquid is burned based on gas and oil-based liquid fuel combination |
| CN108870412A (en) * | 2017-05-15 | 2018-11-23 | 中国石油化工股份有限公司 | A method of petrochemical industry waste liquid is burned based on oil-based liquid fuel |
| CN108870414A (en) * | 2017-05-15 | 2018-11-23 | 中国石油化工股份有限公司 | A method of petrochemical industry waste liquid is burned based on gaseous fuel |
| CN111197754A (en) * | 2020-02-25 | 2020-05-26 | 莱芜德正环保科技有限公司 | Green high-efficient hazardous waste rotary kiln incineration processing system based on oxygen-enriched air supply of secondary combustion chamber |
| CN114963201A (en) * | 2022-04-21 | 2022-08-30 | 福建省福能龙安热电有限公司 | Dimethylamine waste liquid treatment device and process thereof |
| CN116557877A (en) * | 2023-07-09 | 2023-08-08 | 浙江百能科技有限公司 | Oxygen-enriched incineration and heat recovery system for PTA waste residue liquid |
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| CN203571761U (en) * | 2013-11-06 | 2014-04-30 | 武汉锅炉集团工程技术有限公司 | Saponification waste liquid burning and alkali recovery boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439862A (en) * | 2016-11-25 | 2017-02-22 | 上海第升环保科技有限公司 | Salt-containing waste liquid phased incineration treatment device and method |
| CN108870413A (en) * | 2017-05-15 | 2018-11-23 | 中国石油化工股份有限公司 | A method of petrochemical industry waste liquid is burned based on gas and oil-based liquid fuel combination |
| CN108870412A (en) * | 2017-05-15 | 2018-11-23 | 中国石油化工股份有限公司 | A method of petrochemical industry waste liquid is burned based on oil-based liquid fuel |
| CN108870414A (en) * | 2017-05-15 | 2018-11-23 | 中国石油化工股份有限公司 | A method of petrochemical industry waste liquid is burned based on gaseous fuel |
| CN108870412B (en) * | 2017-05-15 | 2020-12-22 | 中国石油化工股份有限公司 | Method for incinerating petrochemical waste liquid based on oily liquid fuel |
| CN108870414B (en) * | 2017-05-15 | 2020-12-22 | 中国石油化工股份有限公司 | Method for incinerating petrochemical waste liquid based on gas fuel |
| CN108870413B (en) * | 2017-05-15 | 2020-12-22 | 中国石油化工股份有限公司 | Method for incinerating petrochemical waste liquid based on gas and oily liquid mixed fuel |
| CN111197754A (en) * | 2020-02-25 | 2020-05-26 | 莱芜德正环保科技有限公司 | Green high-efficient hazardous waste rotary kiln incineration processing system based on oxygen-enriched air supply of secondary combustion chamber |
| CN114963201A (en) * | 2022-04-21 | 2022-08-30 | 福建省福能龙安热电有限公司 | Dimethylamine waste liquid treatment device and process thereof |
| CN116557877A (en) * | 2023-07-09 | 2023-08-08 | 浙江百能科技有限公司 | Oxygen-enriched incineration and heat recovery system for PTA waste residue liquid |
| CN116557877B (en) * | 2023-07-09 | 2023-10-24 | 浙江百能科技有限公司 | Oxygen-enriched incineration and heat recovery system for PTA waste residue liquid |
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|---|---|
| CN103591591B (en) | 2016-08-17 |
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