CN114234210A - Petrochemical waste liquid integration incineration boiler - Google Patents
Petrochemical waste liquid integration incineration boiler Download PDFInfo
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- CN114234210A CN114234210A CN202111585638.2A CN202111585638A CN114234210A CN 114234210 A CN114234210 A CN 114234210A CN 202111585638 A CN202111585638 A CN 202111585638A CN 114234210 A CN114234210 A CN 114234210A
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- flue gas
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- 230000010354 integration Effects 0.000 title description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 87
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- 238000010791 quenching Methods 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
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- 239000003245 coal Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 18
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Images
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/003—Feed-water heater systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Environmental & Geological Engineering (AREA)
Abstract
The invention discloses a petrochemical waste liquid integrated incineration boiler, and relates to the field of petrochemical waste liquid treatment. This integrated incineration boiler includes: the device comprises a heat-insulating hearth, a matrix type burner group, a radiation cooling chamber, a superheater, a quench tower, a tail flue and an economizer feed water heating system, wherein a flue gas inlet of the heat-insulating hearth is connected with the matrix type burner group, a flue gas outlet of the heat-insulating hearth is connected with a flue gas inlet of the radiation cooling chamber, the superheater is arranged at a flue gas outlet of the radiation cooling chamber, the flue gas outlet of the radiation cooling chamber is connected with the flue gas inlet of the quench tower, a flue gas outlet of the quench tower is connected with the flue gas inlet of the tail flue, and a first economizer and a second economizer are sequentially arranged in the tail flue from the flue gas inlet to the flue gas outlet; the first economizer and the second economizer are connected with a economizer water supply heating system. The integrated incineration boiler solves the problems that various waste liquids with different heat values and moisture in the petrochemical industry are subjected to integrated combustion treatment, the efficient treatment and recycling efficiency of the waste liquids is improved, the dust accumulation on the heating surface is reduced, the pollutant emission is reduced and the like.
Description
Technical Field
The invention relates to the field of petrochemical waste liquid treatment, in particular to a petrochemical waste liquid integrated incineration boiler.
Background
The organic waste liquid discharged from the petrochemical industry has the characteristics of large quantity, high concentration, multiple types, strong toxic and harmful properties, complex components and the like, is difficult to treat, brings great harm to the living environment of people, and can cause a great amount of death of aquatic animals and plants if the discharged organic waste liquid directly flows into a water area; if the water permeates underground, the water can pollute underground water and crops; if animals and plants ingest harmful substances therein, human health is affected by transmission through the food chain. Therefore, the efficient, thorough and safe treatment of the petrochemical waste liquid becomes a problem to be solved at present.
The waste liquid is usually treated by incineration, and the toxic waste liquid is incinerated by an incinerator, so that the waste liquid is decomposed into non-toxic gas in the combustion process and is discharged into the atmosphere. The incineration method is a comprehensive process of pyrolysis and deep oxidation, and toxic and harmful organic components in the waste liquid can be completely oxidized, decomposed and converted into H2O and CO2 to be discharged by incineration, so that the aims of reducing the volume of waste, eliminating toxic and harmful substances to the maximum extent, recycling available energy and protecting the environment are fulfilled. As a key device in the petrochemical waste liquid incineration treatment technology, an incineration boiler is the most important of the make internal disorder or usurp waste liquid incineration treatment technology. The key parameters influencing the operation of the incineration boiler comprise the following three points:
(1) the temperature of the furnace chamber is generally maintained between 900 ℃ and 1800 ℃, if the temperature of the furnace chamber is too low, organic matters in the waste liquid cannot be completely decomposed, secondary pollution is easily caused, and if the temperature of the furnace chamber is too high, the operation cost is increased, the fuel consumption is increased, and the operation life of the waste liquid incinerator is influenced;
(2) the excess air coefficient is determined according to actual requirements, the insufficient incineration is easily caused by the excessively small excess air coefficient, and trace side reactions and temperature fluctuation of a hearth are caused by the excessively large excess air coefficient;
(3) the residence time of the liquid drops/particles of the waste liquid in the waste liquid incinerator is reasonable within 3-10 s, and the consistent degree of the residence time scale and the required oxidation time scale of the waste liquid has obvious influence on the combustion effect of the incinerator.
The existing incineration boiler has the defects that the retention time of waste liquid in a hearth is short, the incineration is not thorough, the boiler is easy to slag and deposit ash, and the stable operation period is short.
Chinese patent publication No. CN105240861A proposes a high-concentration salt-containing organic waste liquid incineration boiler, which comprises an auxiliary burner, a waste liquid spray gun, a heat-insulating hearth combustion chamber, a steering chamber, a radiation cooling chamber, a radiation water-cooling tube panel, a convection evaporation tube panel, a steam drum, a high-temperature economizer, a low-temperature economizer, an ash hopper, a flue connecting expansion joint and a furnace wall. However, the waste liquid incineration boiler has the following disadvantages: (1) only one waste liquid burner is arranged at the top of the hearth, so that the fuel adaptability is poor. (2) The fused salt reheating burner is arranged on the side wall of the fused salt groove at the bottom of the furnace, and a large amount of secondary heating fuel needs to be consumed for reheating the fused salt, so that the whole treatment process is complex, and the production and operation cost is increased. (3) The flue gas is subjected to quenching process treatment by adopting the radiation cooling tube panel, although the heat recovery utilization rate is high, the cooling time is long, secondary pollutants such as dioxin and the like are easily generated, and because the flue gas flow is complicated, the high-temperature flue gas is easily attached to a heating surface by carrying molten salt, slagging is formed, the corrosion and ash deposition blockage of the tube are avoided, and the pipe is not easy to remove.
Due to the defects of the prior art, the traditional waste liquid incineration boiler cannot solve the problems of combustion treatment of various waste liquids with different heat values and moisture in the petrochemical industry, low waste liquid treatment and recycling efficiency, serious dust accumulation on a heating surface, high pollutant discharge and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a petrochemical waste liquid integrated incineration boiler to solve the problems of integrated combustion treatment of various waste liquids with different heat values and moisture in the petrochemical industry, improvement of the efficient treatment and reutilization efficiency of the waste liquids, reduction of dust accumulation on a heating surface, reduction of pollutant discharge and the like.
In order to achieve the technical purpose, the invention adopts the following technical scheme: an integrated incineration boiler for petrochemical waste liquid, comprising: the device comprises a heat-insulating hearth, a matrix type burner group, a radiation cooling chamber, a superheater, a quench tower, a tail flue and an economizer feed water heating system, wherein a flue gas inlet of the heat-insulating hearth is connected with the matrix type burner group, a flue gas outlet of the heat-insulating hearth is connected with a flue gas inlet of the radiation cooling chamber, the superheater is arranged at a flue gas outlet of the radiation cooling chamber, the flue gas outlet of the radiation cooling chamber is connected with the flue gas inlet of the quench tower, a flue gas outlet of the quench tower is connected with the flue gas inlet of the tail flue, and a first economizer and a second economizer are sequentially arranged in the tail flue from the flue gas inlet to the flue gas outlet; the first economizer and the second economizer are connected with a economizer water supply heating system.
Furthermore, secondary air nozzles with four tangential corners are arranged at the upper part of the heat-insulating hearth; the bottom of the heat insulation hearth is provided with a self-converging liquid discharge channel which has a back inclination angle of 10-15 degrees and is protruded and declined towards the center of the heat insulation hearth.
Further, a flue gas channel in the radiation cooling chamber is a concave variable cross-section flue.
Further, the superheater comprises a high-temperature superheater, a medium-temperature superheater and a low-temperature superheater which are transversely and sequentially arranged, and the low-temperature superheater is closest to a flue gas outlet of the radiation cooling chamber.
Further, the number of burners in the matrix type burner group is 3-7.
Further, the quench tower is non-adiabatic formula quench tower, be equipped with wedge support guider on the quench tower, wedge support guider includes: support, wedge, locating pin, backing plate, the circumferencial direction evenly distributed of quench tower barrel is followed to the support, and the contained angle that two adjacent support axes formed is 45, and the barrel fixed connection of locating pin and quench tower is passed through to the bottom of every support, just be equipped with the backing plate between the bottom of support and the quench tower, the wedge sets up in the both sides of support, the one end of wedge and the barrel fixed connection of quench tower leave the clearance on the other end, the backing plate sets up in the clearance.
Further, the top of matrix combustor group is equipped with two collection casees and directly hangs the structure, two collection casees directly hang the structure and include: the upper header of the first side water-cooled wall is connected with the upper header of the second side water-cooled wall through the air guide tube.
Further, the first side water wall upper header and the top of the radiation cooling chamber are positioned on the same horizontal plane.
Further, the economizer feedwater heating system includes: the heat exchange tube is arranged in the steam pocket, the other branch of the water supply is connected with the second water inlet of the mixed header through the heat exchange tube, and the water outlet of the mixed header is connected with the steam pocket through the first connecting tube.
Further, boiler water in the steam drum is connected with a lower header of the water-cooled wall through a downcomer, the lower header of the water-cooled wall is communicated with an upper header, and the upper header is connected with the steam drum through an ascending pipe; saturated steam in the steam pocket is connected with the low-temperature superheater, the medium-temperature superheater and the high-temperature superheater in sequence through the gas guide pipes.
Compared with the prior art, the invention has the beneficial effects that:
(1) the petrochemical waste liquid has the advantages of being rich in source, multiple in components and different in ignition point, containing a large amount of phenol hydrocarbon, and easily generating dioxin after incineration, the incineration boiler integrally burns various petrochemical waste liquids, realizes effective incineration of various waste liquids with different heat values and moisture generated in the refining process of petrochemical enterprises in the incineration boiler, solves the problems that the traditional individual incineration operation of various waste liquids is difficult to control, the direct mixed combustion is insufficient and the like, ensures that the temperature of a heat insulation hearth is more than 1100 ℃, ensures that the residence time of flue gas in a radiation cooling chamber is more than 2s by adopting a concave variable cross-section flue design for the radiation cooling chamber, effectively controls the generation of dioxin, has low pollutant discharge and meets the national environmental protection standard;
(2) the quenching tower in the incineration boiler adopts a non-adiabatic quenching tower, so that complicated flue gas flow can be reasonably avoided, the problems of corrosion and ash deposition of high-temperature molten salt-containing flue gas on a heating surface and the like are avoided, and the construction cost and period of equipment are greatly reduced; simultaneously to current bearing structure connected mode change, adopt wedge support guider, simplified quench tower whole support and guider's arrangement, have maneuverability is strong, simple structure, low cost, the characteristics of easy manufacturing have improved quench tower's safety and stability, and very big reduction operation cost of overhaul simultaneously improves production efficiency, creates higher economic benefits, reduces the intensity of later stage operation maintenance, the life cycle of quench tower operation of energetically prolonging.
Drawings
FIG. 1 is a schematic structural view of a petrochemical waste liquid integrated incineration boiler according to the present invention;
FIG. 2 is a structural arrangement diagram of a matrix burner group in the present invention; fig. 2 (a) is a layout diagram when the number of burners is 3, fig. 2 (b) is a layout diagram when the number of burners is 4, fig. 2 (c) is a layout diagram when the number of burners is 5, fig. 2 (d) is a layout diagram when the number of burners is 6, and fig. 2 (e) is a layout diagram when the number of burners is 7;
FIG. 3 is a schematic view of a double-header straight-hanging structure in the present invention;
FIG. 4 is a schematic view of the wedge shaped support guide of the quench tower of the present invention: fig. 4 (a) is a plan view of the wedge-shaped support guide; FIG. 4 (b) is a sectional view taken along the A-A plane of FIG. 4 (a); FIG. 4 (c) is a sectional view taken along the plane B-B in FIG. 4 (a); FIG. 4 (d) is a cross-sectional view taken along the plane C-C in FIG. 4 (a);
FIG. 5 is a schematic view of an economizer feedwater heating system of the present invention;
wherein, 1-an adiabatic hearth, 2-a matrix burner group, 3-a secondary air nozzle, 4-a double-header straight hanging structure, 5-a self-confluence liquid drainage channel, 6-a radiation cooling chamber, 7-a high-temperature superheater, 8-a medium-temperature superheater, 9-a low-temperature superheater, 10-a quench tower, 11-a wedge-shaped supporting and guiding device, 12-a tail flue, 13-a first-level economizer, 14-a second-level economizer, 15-an economizer feed water heating system, 16-a steam pocket, 17-a lower rack pipe, 18-a water cooling wall, 19-an ascending pipe, 20-a first side water cooling wall upper header, 21-an air guide pipe, 22-a second side water cooling wall upper header, 23-a support, 24-a wedge-shaped plate, 25-a positioning pin, 26-a backing plate and 27-a mixed header, 28-heat exchanger, 29-first connection pipe, 30-second connection pipe.
Detailed Description
The technical solution of the present invention is further explained below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a petrochemical waste liquid integrated incineration boiler according to the present invention, the incineration boiler includes: the system comprises an insulated hearth 1, a matrix type burner group 2, a radiation cooling chamber 6, a superheater, a quench tower 10, a tail flue 12 and an economizer feed water heating system 15, wherein a flue gas inlet of the insulated hearth 1 is connected with the matrix type burner group 2, atomized petrochemical waste liquid is sprayed into the insulated hearth 1 from the matrix type burner group 2 under the wrapping of combustion-supporting air, a multi-point spraying combustion temperature control technology is adopted to realize efficient combustion of the petrochemical waste liquid, the waste liquid is fully combined with combustion-supporting air through multi-point entering into the furnace to be combusted and uniformly heated, the combustion is easily controlled, the temperature in the insulated hearth 1 can be higher than 1100 ℃, and the generation of dioxin is effectively controlled; the secondary air nozzles 3 for supplying air in a four-corner tangential circular manner in a grading manner are arranged at the upper part of the heat-insulating hearth 1, so that the control of the excess air coefficient in the furnace can be optimized, the air is distributed in a grading manner in different combustion areas in the heat-insulating hearth 1, the sufficient combustion of different types of waste liquid is ensured, the combustion efficiency is improved, the furnace temperature is controlled, and the generation of pollutants is reduced. The flue gas outlet of the heat-insulating hearth 1 is connected with the flue gas inlet of the radiation cooling chamber 6, and in order to ensure that the residence time of the flue gas in the radiation cooling chamber 6 is more than 2s, the flue gas channel in the radiation cooling chamber 6 is a concave variable cross-section flue, so that the residence time of the flue gas can be prolonged; a flue gas outlet of the radiation cooling chamber 6 is provided with a superheater, and the flue gas outlet of the radiation cooling chamber 6 is connected with a flue gas inlet of the quenching tower 10, so that when the flue gas reaches the quenching tower 10, the flue gas can be rapidly quenched and cooled; a flue gas outlet of the quenching tower 10 is connected with a flue gas inlet of a tail flue 12, and a first coal economizer 13 and a second coal economizer 14 are sequentially arranged in the tail flue 12 from the flue gas inlet to the flue gas outlet; the first economizer 13 and the second economizer 14 are connected with an economizer feed water heating system 15, the proper exhaust gas temperature in the tail flue 12 is ensured by adjusting the water amount entering the first economizer 13 and the second economizer 14, and finally the exhaust gas enters a purification treatment system, so that the problem of low-temperature corrosion of a heating surface caused by exhaust gas temperature change due to waste liquid incineration amount change can be solved.
The bottom of the heat-insulating furnace hearth 1 is provided with the self-confluence liquid discharge channel 5 which has a back inclination angle of 10-15 degrees and protrudes and declines towards the center of the heat-insulating furnace hearth 1, so that the ash residue in a high-temperature molten state can smoothly fall into a bottom residue pool, and is discharged through a residue discharge device of a rear wall under the action of gravity after being deposited to a certain degree.
The superheater comprises a high-temperature superheater 7, a medium-temperature superheater 8 and a low-temperature superheater 9 which are transversely and sequentially arranged, wherein the low-temperature superheater 9 is closest to a flue gas outlet of the radiation cooling chamber 6. The high-temperature superheater 7, the medium-temperature superheater 8 and the low-temperature superheater 9 are all of a coiled pipe structure, and the coiled pipes are uniformly arranged in the flue, so that the velocity field distribution of the flue gas is more uniform, and meanwhile, the countercurrent heat exchange between steam and the flue gas can be realized. The temperature of the flue gas is reduced to about 800 ℃ after heat exchange through the radiation cooling chamber 6, the flue gas sequentially passes through the high-temperature superheater 7 through the upper concave variable cross-section flue, the temperature of the flue gas is reduced to about 700 ℃, then the temperature of the flue gas is reduced to about 650 ℃ through the medium-temperature superheater 8, and finally the temperature of the flue gas is reduced to about 500 ℃ through the low-temperature superheater 9. Through arranging tertiary superheater, make the high temperature flue gas temperature of 6 exits in radiant cooling chamber reduce, make its heat carry out effectual absorption, the flue gas temperature that further control got into quench tower 10 is in a relatively stable interval, prevents that non-adiabatic formula quench tower 10 from being in the flue gas overtemperature condition, the security of protection system operation.
As shown in fig. 2, the number of burners in the matrix burner group 2 is 3-7, and the arrangement schematic diagrams of the burners in the number of 3-7 are respectively given in (a) - (e) of fig. 2, the arrangement form of the matrix burner group 2 is flexible and various, and the centralized and effective incineration of various waste liquids with different heat values and moisture contents generated in the petrochemical enterprise refining process in the same incineration boiler can be realized.
According to the invention, a double-header straight hanging structure 4 is arranged above a matrix type combustor group 2, as shown in fig. 3, the double-header straight hanging structure 4 comprises: the heat insulation furnace comprises a first side water-cooled wall upper header 20, an air duct 21 and a second side water-cooled wall upper header 22, wherein the first side water-cooled wall upper header 20 is connected with the second side water-cooled wall upper header 22 through the air duct 21, and the first side water-cooled wall upper header 20 and the top of the radiation cooling chamber 6 are positioned on the same horizontal plane, so that the heights of the heat insulation furnace 1 and the radiation cooling chamber 6 are kept consistent, and the problem that the heating surface is torn due to expansion difference between the heat insulation furnace 1 and the radiation cooling chamber 6 is solved.
In a petrochemical waste liquid incineration boiler, flue gas generated after high-temperature incineration of waste liquid is easy to generate dioxin low-temperature resynthesis in a temperature range of 200-500 ℃, and the most effective avoidance method is that flue gas rapidly cooling technology is adopted to enable the flue gas to rapidly pass through the temperature range, and the key point of the method is that the flue gas and cooling liquid are mixed and rapidly cooled to cause the problem of thermal expansion and cold contraction of a quenching tower; therefore, the quenching tower 10 is a non-adiabatic quenching tower, so that compared with the traditional heat exchange cooling, the cooling efficiency is improved, and the generation of dioxin is effectively reduced; compared with the traditional spray heat-insulating quench tower, the spray heat-insulating quench tower avoids a large amount of lining type pouring structures adopted in the past, and saves the construction period and the raw material cost. Meanwhile, due to the vertical tower arrangement mode of the large-diameter circular cylinder, the quenching tower 10 is difficult to adopt an elastic suspension structure and is mostly welded and fixed by adopting a supporting structure, and due to the limitation of the size of the quenching tower 10 and the influence of self-weight, the problems of roundness deviation, shape enlargement and even weld joint tearing of the quenching tower 10 caused by violent flue gas exchange are difficult to deal with, and the wedge-shaped supporting and guiding device 11 is arranged on the quenching tower 10, see (a) - (d) in fig. 4, wherein the wedge-shaped supporting and guiding device 11 comprises: support 23, wedge plate 24, locating pin 25, backing plate 26, support 23 is along the circumferencial direction evenly distributed of quench tower 10 barrel, the contained angle that two adjacent support 23 axes formed is 45, the barrel fixed connection of locating pin 25 and quench tower 10 is passed through to the bottom of every support 23, and be equipped with backing plate 26 between the bottom of support 23 and quench tower 10, wedge plate 24 sets up in the both sides of support 23, wedge plate 24's one end and quench tower 10's barrel fixed connection, leave the clearance on the other end, backing plate 26 sets up in the clearance. This wedge supports guider 11 and carries out spacingly through wedge plate 24 to support 23, and carry out the on-the-spot installation through backing plate 26 and adjust, guarantee to connect accurately, prop quench tower 10 and rigidity fixed, be different from traditional welded connection, through the circularity of 25 accurate control of locating pin quench tower 10, the bearing structure intensity of support 23 has both been guaranteed, quench tower 10 has been increased again and has been resisted the stability that produces the heat displacement from the violent heat transfer of flue gas, the effectual expend with heat and contract with cold problem of quench tower 10 that leads to of flue gas quick cooling of having solved.
Referring to fig. 5, the economizer feedwater heating system 15 of the present invention includes: the boiler comprises a steam drum 16, a mixing header 27, a heat exchange pipe 28, a first connecting pipe 29 and a second connecting pipe 30, wherein one branch of water supply sequentially enters a first economizer 13 and a second economizer 14 and is connected with a first water inlet of the mixing header 27 through the second connecting pipe 30, the heat exchange pipe 28 is arranged in the steam drum 16, the other branch of the water supply is connected with a second water inlet of the mixing header 27 through the heat exchange pipe 28, a water outlet of the mixing header 27 is connected with the steam drum 16 through the first connecting pipe 29, and finally, smoke enters a purification treatment system, so that the problem of low-temperature corrosion of a heating surface caused by the change of smoke exhaust temperature due to the change of waste liquid incineration amount can be solved.
In the invention, boiler water in a steam drum 16 is connected with a lower header of a water-cooled wall 18 through a downcomer 17, the lower header of the water-cooled wall 18 is communicated with an upper header, and the upper header is connected with the steam drum 16 through an ascending pipe 19; saturated steam in the steam pocket 16 is sequentially connected with the low-temperature superheater 9, the medium-temperature superheater 8 and the high-temperature superheater 7 through gas guide tubes. Boiler water in the steam drum 16 flows into a header at the lower part of a water-cooled wall 18 through a downcomer 17, the boiler water is distributed to each tube bundle by the header at the lower part of the water-cooled wall 18, and water in each tube bundle is collected to an upper header after absorbing heat and is connected with the steam drum 16 through an upcomer 19; the working medium in the steam pocket 16 generates saturated steam through steam-water separation, enters the low-temperature superheater 9 through the steam guide pipe, then enters the medium-temperature superheater 8, and finally enters the high-temperature superheater 7 to generate superheated steam which is led to an external steam pipe network through the connecting pipe.
The operation of the petrochemical waste liquid integrated incineration boiler of the invention relates to three processes:
(1) flue gas flow: atomized petrochemical waste liquid is sprayed into the heat-insulating hearth 1 from the matrix type burner group 2 under the wrapping of combustion-supporting air, different combustion areas in the heat-insulating hearth 1 are subjected to graded air distribution, and hot smoke with the temperature of more than 1100 ℃ is generated by sufficient combustion. Hot flue gas enters a flue gas inlet of a radiation cooling chamber 6 from a flue gas outlet of a heat insulation hearth 1, the temperature of the hot flue gas is reduced to about 800 ℃ after heat exchange in the radiation cooling chamber 6, the hot flue gas sequentially passes through a high-temperature superheater 7 at a flue with a concave variable cross section at the upper part, the temperature of the flue gas is reduced to about 700 ℃, then the temperature of the flue gas is reduced to about 650 ℃ through a medium-temperature superheater 8, and finally the temperature of the flue gas is reduced to about 500 ℃ through a low-temperature superheater 9; then the flue gas enters a flue gas inlet of a quenching tower 10 through a flue gas outlet of the radiation cooling chamber 6, and is rapidly quenched and cooled to 200 ℃ in the quenching tower 10; and finally, the flue gas passes through a tail flue 12 and sequentially passes through a first economizer 13 and a second economizer 14, and finally enters a flue gas purification system.
(2) Air flow: air firstly enters the matrix type burner group 2 through a branch pipe and is sprayed into the top of the first heat insulation hearth 1 from the matrix type burner group 2 to participate in combustion; and the other branch pipe air is sprayed into the first heat-insulating hearth 1 from an air channel through a secondary air nozzle 3 with the four tangential corners at the upper part of the first heat-insulating hearth 1 to participate in combustion.
(3) Steam-water flow: the boiler feed water comprises two branch pipes, wherein one branch of the feed water sequentially enters the first economizer 13 and the second economizer 14 and is connected with a first water inlet of the mixing header 27 through a second connecting pipe 30; the other branch of the feed water is connected with a second water inlet of a mixing header 27 through a heat exchange tube 28 arranged in the steam drum 16, the feed water enters the steam drum 16 from a water outlet of the mixing header 27 through a first connecting tube 29, then the boiler water in the steam drum 16 flows into a header at the lower part of the water-cooled wall 18 through a descending tube 17, the header at the lower part of the water-cooled wall 18 is distributed to each tube bundle, the water in each tube bundle absorbs heat and then is collected into an upper header, and the header is connected with the steam drum 16 through an ascending tube 19; the working medium in the steam pocket 16 generates saturated steam through steam-water separation, the saturated steam enters the low-temperature superheater 9 through the steam guide pipe, then enters the medium-temperature superheater 8, and finally enters the high-temperature superheater 7, and the generated superheated steam is finally led to an external steam pipe network through the connecting pipe.
The petrochemical waste liquid integrated incineration boiler disclosed by the invention can be used for carrying out integrated combustion on the petrochemical waste liquid, can realize treatment and reuse of the petrochemical waste liquid, can be used for generating steam for steam supply and heat supply or power generation of enterprises, improves the efficient treatment and reuse of the waste liquid, realizes ultralow emission of pollutants, increases social employment, not only solves the current situation of current energy shortage, saves mineral fuel, but also can bring huge ecological, social and economic benefits, and has very important practical significance for relieving the contradiction between energy supply and demand and reducing and relieving environmental pollution.
The foregoing is merely exemplary and illustrative of the embodiments of the present invention, and it will be apparent to those skilled in the art that modifications and additions can be made directly or indirectly from the disclosure and general knowledge of the present invention or can be substituted by the same in a similar manner, without departing from the scope of the present invention, which is intended to cover all such modifications and additions.
Claims (10)
1. The utility model provides an integrated incineration boiler of petrochemical waste liquid which characterized in that includes: the device comprises a heat-insulating hearth (1), a matrix type burner group (2), a radiation cooling chamber (6), a superheater, a quenching tower (10), a tail flue (12) and a coal economizer feed water heating system (15), wherein a flue gas inlet of the heat-insulating hearth (1) is connected with the matrix type burner group (2), a flue gas outlet of the heat-insulating hearth (1) is connected with a flue gas inlet of the radiation cooling chamber (6), a flue gas outlet of the radiation cooling chamber (6) is provided with the superheater, a flue gas outlet of the radiation cooling chamber (6) is connected with a flue gas inlet of the quenching tower (10), a flue gas outlet of the quenching tower (10) is connected with a flue gas inlet of the tail flue (12), and a first coal economizer (13) and a second coal economizer (14) are sequentially arranged from the flue gas inlet to the flue gas outlet in the tail flue (12); the first economizer (13) and the second economizer (14) are connected with an economizer feed water heating system (15).
2. An integrated incineration boiler suitable for petrochemical waste liquid according to claim 1, characterised in that the upper part of the heat-insulated furnace chamber (1) is provided with secondary air nozzles (3) of the type of truncated circle at four corners; the bottom of the heat insulation hearth (1) is provided with a self-confluence liquid discharge channel (5) which has a back inclination angle of 10-15 degrees and is protruded and declined towards the center of the heat insulation hearth (1).
3. The petrochemical waste liquid integrated incineration boiler according to claim 1, wherein the flue gas channel in the radiant cooling chamber (6) is a concave variable cross-section flue.
4. The petrochemical waste liquid integrated incineration boiler according to claim 1, wherein the superheater comprises a high-temperature superheater (7), a medium-temperature superheater (8) and a low-temperature superheater (9) which are transversely arranged in sequence, and the low-temperature superheater (9) is closest to a flue gas outlet of the radiation cooling chamber (6).
5. The petrochemical waste liquid integrated incineration boiler according to claim 1, wherein the number of burners in the matrix burner group (2) is 3-7.
6. The petrochemical waste liquid integrated incineration boiler according to claim 1, wherein the quenching tower (10) is a non-adiabatic type quenching tower, a wedge-shaped supporting and guiding device (11) is arranged on the quenching tower (10), and the wedge-shaped supporting and guiding device (11) comprises: support (23), wedge (24), locating pin (25), backing plate (26), the circumferencial direction evenly distributed of quench tower (10) barrel is followed in support (23), and the contained angle that two adjacent support (23) axes formed is 45, and the barrel fixed connection of locating pin (25) and quench tower (10) is passed through to the bottom of every support (23), just be equipped with backing plate (26) between the bottom of support (23) and quench tower (10), wedge (24) set up in the both sides of support (23), the one end of wedge (24) and the barrel fixed connection of quench tower (10) leave the clearance on the other end, backing plate (26) set up in the clearance.
7. The petrochemical waste liquid integrated incineration boiler according to claim 1, wherein a double-header straight hanging structure (4) is arranged above the matrix type burner group (2), and the double-header straight hanging structure (4) comprises: the water-cooled wall upper header comprises a first side water-cooled wall upper header (20), an air guide pipe (21) and a second side water-cooled wall upper header (22), wherein the first side water-cooled wall upper header (20) is connected with the second side water-cooled wall upper header (22) through the air guide pipe (21).
8. An integrated incineration boiler for petrochemical waste liquid according to claim 7, characterised in that the first side waterwall header (20) is located on the same level as the top of the radiant cooling chamber (6).
9. The petrochemical waste liquid integrated incineration boiler according to claim 1, wherein the economizer feed water heating system (15) comprises: steam pocket (16), mix collection case (27), heat exchange tube (28), first connecting pipe (29), second connecting pipe (30), a branch road of feedwater gets into first economizer (13), second economizer (14) in proper order and is connected through second connecting pipe (30) and the first water inlet of mixing collection case (27), heat exchange tube (28) set up in steam pocket (16), and another branch road of feedwater passes through heat exchange tube (28) and is connected with the second water inlet of mixing collection case (27), the delivery port of mixing collection case (27) is connected with steam pocket (16) through first connecting pipe (29).
10. The integrated incineration boiler for petrochemical waste liquid according to claim 9, characterized in that boiler water in the steam drum (16) is connected with a lower header of a water wall (18) through a downcomer (17), the lower header of the water wall (18) is communicated with an upper header, and the upper header is connected with the steam drum (16) through an upcomer (19); saturated steam in the steam pocket (16) is sequentially connected with the low-temperature superheater (9), the medium-temperature superheater (8) and the high-temperature superheater (7) through the gas guide tubes.
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| CN202111585638.2A CN114234210A (en) | 2021-12-23 | 2021-12-23 | Petrochemical waste liquid integration incineration boiler |
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| CN202111585638.2A CN114234210A (en) | 2021-12-23 | 2021-12-23 | Petrochemical waste liquid integration incineration boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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