CN209415472U - A kind of high chlorinated waste water burning environmental protection and energy saving exhaust system of high saliferous - Google Patents

Abstract

The utility model discloses a kind of high high chlorinated waste waters of saliferous to burn environmental protection and energy saving exhaust system, it is reheated by high temperature incineration, waste heat recycling, cyclone dust removal, water spray chilling, containment dioxin generations, bag-type dust, spray depickling, flue gas, SCR denitration, meets that chlorinated organics in waste liquid are innoxious, energy conservation and environmental protection of minimizing requires.This system mainly includes the equipment such as insulation incinerator, membrane wall water pipe waste heat boiler, cyclone separator, chilling tower, bag filter, depickling spray column, flue gas reheater, SCR denitration device, economizer and chimney.Chlorinated organics in waste liquid, it aoxidizes, decompose at high temperature, then spray into sodium hydroxide solution, after waste heat boiler recycles heat, after high-temperature dust removal, water spray chilling, low temperature dedusting, spray depickling, SCR denitration and heat recovery, atmosphere is discharged by chimney.The utility model has the advantages that manufacturing process is simple, easy to maintenance, operational safety is stable, resource reclaim is high-efficient.

Description

A kind of high chlorinated waste water burning environmental protection and energy saving exhaust system of high saliferous

Technical field

The high salt concentration waste liquid of high chlorinated organics is carried out to burn environmental protection and energy saving discharge the utility model relates to a kind of System belongs to technical field of energy saving and environmental protection, the chlorinated organics complete oxidation in waste liquid can be decomposed, and be converted to sodium salt, Thermal energy can also be recycled while disposing waste liquid and generates steam or hot water, reached energy saving, reduced waste discharge, environmental protection Purpose.

Background technique

With the development of chemical industry, organic salt bearing liquid wastes containing chlorine of generation are more and more.Chlorinated organics generally all have There is different degrees of toxicity, and chemical property is stablized, it is not degradable in natural environment, can exist for a long time, become weight The environomental pollution source wanted, incineration method are one of the effective ways for handling chlorinated waste water.But what is often contained in waste liquid contains Chlorine organic and the salt contained are conflicting.Chlorinated organics are as carbon tetrachloride, vinyl chloride, bromomethane and other are halogen The organic matter of element when burning disposal, addition auxiliary fuel can be decided whether according to the content of halogen, calorific value, is being burned HCl gas can be all generated afterwards, and HCl gas has extremely strong corrosivity, in case of leaking, temperature is reduced to after encountering air Dew-point temperature is all configured in the system of chlorine-containing waste so burning hereinafter, system equipment can be caused to corrode in the short time It is smoke tube exhaust-heat boiler.Although the leakproofness of smoke tube exhaust-heat boiler is preferable, flue gas is not easy to leak, if contained in waste liquid If salt, it is likely that the smoke pipe that boiler can be blocked there is a situation where the salt of molten state, it is complete after causing the salt of molten state cooling It is cleared up completely without method, can only finally change smoke pipe.So the waste liquid containing chlorinated organics and salt bearing liquid wastes must separate at this stage Processing, but it will increase the equipment investment and operating cost of liquid waste processing in this way.Therefore a kind of simple process, rationally height are found Organic salt bearing liquid wastes processing method containing chlorine that effect, the two are taken into account, is of great significance to promotion environment and industry value chain.

For solve the problems, such as above-mentioned contradiction and, the patent of patent No. CN2015200573183 proposes that " one kind containing chlorine for containing The processing unit of salt organic liquid waste ", the process flow which uses are as follows: burning boiler --- radiant cooling room --- is anxious Cooler --- venturi scrubber --- gas-liquid separator --- air-introduced machine --- chimney.The advantages of present apparatus, is using burning Processing method, organic removal rate are high, can liquid receive salt, and can be with recovery section fume afterheat, the disadvantage is that warm in incinerator Degree is not achieved national standard, and the incineration temperature of 18484 clear stipulaties chlorinated organics of standard GB/T must be over 1200 DEG C, and The residence time is not less than 2 seconds at this temperature, and the treatment process of flue gas has missing, to the HCl gas and NO for burning generation_XNot yet There is the flue gas by special environmental protection treatment, after burning to be difficult qualified discharge.

And the patent of patent No. CN201520057318 proposes a kind of " processing dress for the salty organic waste liquid containing chlorine Set ", the process flow which uses are as follows: burning boiler --- radiant cooling room --- quencher --- shaped Venturi dedusting --- gas-liquid separator --- air-introduced machine --- chimney, the advantages of present apparatus, are using incineration treatment method, fire box temperature device More than 1200 DEG C, organic removal rate is high, can receive salt with liquid and sewage is recycled, the disadvantage is that burning the HCl gas generated And NO_XDo not pass through special environmental protection treatment, therefore the flue gas generated after burning is difficult according to dirt as defined in national environmental standard The control for contaminating object discharge requires to realize qualified discharge.

Utility model content

The purpose of this utility model is: in view of the above-mentioned defects in the prior art, provide a kind of chlorinated organics destroy by fire rate it is high, Salt recovery efficiency height, waste heat recovery efficiency height, simple process, it is easy to maintain, comply fully with dirt as defined in national environmental standard The control for contaminating object discharge requires a kind of high high chlorinated waste water of saliferous for realizing qualified discharge to burn environmental protection and energy saving exhaust system.

In order to achieve the above object, using following technical scheme: a kind of high high chlorinated waste water burning environmental protection and energy saving of saliferous Exhaust system, including insulation incinerator, vertical membrane wall water pipe waste heat boiler, cyclone separator, chilling tower, bag filter, Depickling spray column, flue gas reheater, SCR denitration device, air-introduced machine and chimney etc..Organic salt bearing liquid wastes containing chlorine are from incinerator Portion sprays into, and with auxiliary fuel and air mixed burning, guarantees incinerator top by the amount of control auxiliary fuel and air Temperature is not less than 1200 DEG C, and with oxygen oxidation reaction occurs for chlorinated organics at this temperature, generates CO₂、H₂O、NO_X, HCl and The Cl of a small amount of free state₂Etc. small molecule compounds；Entire insulation incinerator is equivalent to one large-scale venturi, incinerator middle and upper part Narrow aditus laryngis is equivalent to the aditus laryngis of venturi, and the top of incinerator is equivalent to the entrance of venturi, the lower part phase of incinerator When in the outlet diffuser of venturi, using Venturi effect, spraying into NaOH solution or NaOH powder in its throat can be produced Raw higher suction-operated, sour gas and NaOH of the reinforcement containing HCl, which react, generates NaCl.What incinerator middle and upper part generated Flue gas enters incinerator lower part by narrow aditus laryngis, arranges NaOH solution or NaOH powder nozzle in throat location, due to Throat location flue gas flow rate becomes larger, and the NaOH solution or NaOH powder being sparged into can be uniformly mixed with flue gas, to improve The reaction efficiency of NaOH and HCl；Incinerator lower part flue-gas temperature is not less than 1100 DEG C, and the salt of molten state, which is fallen into, in flue gas burns The molten salt pool of furnace bottom is burnt, and is arranged in the twin shaft cooler of incinerator lower part by melting the inflow of salt pipe, in twin shaft cooler The salt of middle molten state is cooled to solid-state and is broken, and falls into the scraper slag removing machine of lower section, is sent into after cooling down once again and is packaged workshop. High-temperature flue gas enters vertical membrane wall water pipe waste heat boiler after coming out from incinerator, exchanges heat with boiler water, generates saturated vapor.Through Thermodynamic computing is crossed, waste heat boiler heating surface is reasonably designed, makes 550 DEG C of exit gas temperature of waste heat boiler.550 DEG C of cigarette Gas enters cyclone separator, and the biggish ash content of partial size is captured in cyclone separator, falls into scraper plate from cyclone separator bottom Slag remover is also fed into after cooling and is packaged workshop.Flue gas is drawn from the cyclone separator top, chilling tower is sent into, with penetrating Desalted water contact heat-exchanging, flue-gas temperature is reduced to 180 DEG C by 550 DEG C by (< 1s) in a very short period of time, greatly reduces dioxin The synthesis of substance.Venturi is arranged on flue after the chilling tower, is sprayed at the aditus laryngis of the Venturi Quick lime and active carbon powder, containment dioxin-like chemical synthesis, and other harmful substances can be adsorbed.Then flue gas enters cloth Bag dust collector, the ash content that bag filter is 0~10 μm for partial size has higher arresting efficiency, and venturi can be filled The quick lime and active carbon for setting penetrating trap, and ash content collecting tank is installed in the bag filter lower part.Leave the cloth bag The flue gas of deduster enters depickling spray column, and depickling spray column material is glass reinforced plastic, using void tower form, three-level is arranged altogether and sprays Device, circulation alkali liquor spray into after being pressurizeed by booster pump, for removing remaining HCl and Cl in flue gas₂；Due to the cigarette of mixed alkali liquor Gas contains large quantity of moisture, so the top of tower in depickling spray arranges two-stage demister, cloth on the flue after extracting tower Spiral-flow type demister is set, the most of moisture in flue gas is removed, is about 65 DEG C in the exit flue-gas temperature of extracting tower.65 DEG C Flue gas enters flue gas reheater, and by burning, auxiliary fuel makes flue-gas temperature be reheated to 220 DEG C, and 220 DEG C are this system The preference temperature of middle denitrating catalyst；Reductant nozzle is installed on flue before SCR denitration device, is gone back for guarantee to spray into Former agent is sufficiently mixed with flue gas, and grid is arranged in the subsequent flue of reductant nozzle, and reducing agent and the abundant of flue gas is promoted to mix It closes, improves the denitration efficiency of SCR denitration device.The flue gas come out from SCR denitration device, HCl, Cl therein₂And NO_XContent is equal Meet national emission standard, but temperature is higher, if direct emission will cause the waste of heat, therefore economizer is arranged and recycles Fume afterheat, makes the temperature of flue gas be reduced to 120 DEG C, is then drawn out to chimney using air-introduced machine, is discharged into atmosphere through chimney.

Further improved, the insulation incinerator (1) divides two sections to be arranged, and middle and lower sections are in "U" shaped, and bottom is set Molten salt pool is set, the fused salt bottom of pond portion is connected to twin shaft cooler (19) by fused salt pipe, under the twin shaft cooler (19) End is connected to scraper slag removing machine (20), and the scraper slag removing machine (20) is connected to external packing workshop, as the intermediate production of reaction Object recycles a certain amount of solid-state salt monomer.

Further improved, using vertical membrane wall water pipe waste heat boiler, flue gas and boiler heating surface are in parallel baffled, cigarette The salt of molten state in gas will not put up a bridge；And by reasonably arranging heating surface, make the flue gas at heat boiler outlet Temperature is reduced to 550 DEG C or so.

Further improved, vertical membrane wall water pipe waste heat boiler and drum form natural convection loop, the drum with Gas-distributing cylinder connection, the softened water of addition successively enter drum after thermal deaerator, boiler feed pump, economizer；It is described Steam outlet pipe road there are two setting on gas-distributing cylinder, one of them connect with thermal deaerator, another connect with external gas utilization unit.

The technical measures that the utility model uses specifically include that (1) insulation incinerator divides two sections to arrange, organic containing chlorine Salt bearing liquid wastes are burned in incinerator upper section, and the amount that control sprays into NaOH solution guarantees that incinerator lower part flue-gas temperature is not less than 1100 DEG C, and by reasonable design hearth construction, so that flue gas is no less than 2s in the at a temperature of stop not less than 1100 DEG C；It is burning Aditus laryngis among furnace arranges NaOH solution nozzle, it is made to react with the HCl gas generated in flue gas, removes most HCl gas, the NaCl of generation become molten state under high temperature environment and fall in the molten salt pool of incinerator bottom, and from melting in salt pipe Outflow.(2) arrange that vertical membrane wall water pipe waste heat boiler, 1100 DEG C of flue gas enter vertical membrane wall water after being insulated incinerator Pipe waste heat boiler, rapid cooling after the molten state salt contained in flue gas is contacted with membrane wall, becomes brittleness salt, in self gravity It falls off under the action of soot blower, falls into bottom molten salt pool, workshop is recovered to by scraper slag removing machine.And in heat boiler outlet, Although flue gas and water screen tube make the flue gas of heat boiler outlet by reasonably arranging heating surface area at transversal flow Temperature is reduced to 550 DEG C or so, and the salt in flue gas exists in solid form at this time, and there is no there is a situation where block.(3) it arranges Two-stage dust-extraction unit arranges cyclone dust collectors for high temperature section flue gas, ash content of the cyclone dust collectors for partial size greater than 50 μm Separating effect is higher, traps solid salt from cyclone separator bottom and falls into scraper slag removing machine, is sent to after cooling and is packaged workshop； Low-temperature zone flue gas after chilling tower arranges that bag filter, bag filter have the ash content that partial size is 0~10 μm higher Arresting efficiency.(4) to prevent dioxin-like chemical from synthesizing again during flue gas cool-down, the utility model is in whirlwind point From chilling tower is arranged after device, by spraying into desalted water into chilling tower, make flue-gas temperature in a very short period of time (< 1s) by 550 180 DEG C DEG C are reduced to, residence time of the flue gas in the temperature range that dioxin-like chemical is readily synthesized is shortened；And in chilling Venturi is arranged in flue after tower, by effectively containing to penetrating quick lime and active carbon powder at venturi aditus laryngis The synthesis of dioxin-like chemical, and adsorb the harmful components in flue gas.(5) level-one depickling spray is arranged after bag filter Tower is absorbed remaining HCl gas in flue gas by circulated sprinkling lye, the HCl concentration in flue gas is made to reach discharge standard, is led to Crossing spray lye makes flue-gas temperature be further decreased to 65 DEG C or so, although the temperature the low more is conducive to absorption to HCl, The temperature for reducing lye needs more recirculated cooling waters and bigger heat exchange area, so in general, being reduced to 60~65 It DEG C is the reasonable temperature range of comparison.(6) in view of that may contain nitrogen in organic matter, the temperature of incinerator reaches 1200 DEG C it can also generate more thermal NO_X, so SCR denitration device is arranged after extracting tower.It is come out due to depickling spray column Flue-gas temperature only has 65 DEG C or so, in order to make flue-gas temperature reach the preference temperature of denitrating catalyst, pacifies before SCR denitration device Equipped with flue gas reheater, flue gas is heated using burning auxiliary fuel, flue-gas temperature is made to reach low-temperature denitration catalyst reaction institute The preference temperature needed.(7) for heat extra in recovered flue gas, economizer is provided with after SCR denitration device, by soft Change and the temperature of high-temperature flue gas is reduced to 120 DEG C or so after water exchanges heat, the steam of generation is transported to drum.

The beneficial effects of the utility model, which are to design by reasonable system, to be effectively prevented traditional containing containing chlorine is organic The drawbacks of bisulfate waste liquor processing system so that containing the organic salt bearing liquid wastes of chlorine burn environmental protection and energy saving exhaust system it is simpler, it is perfect, can It leans on.Specifically: the first, incinerator incineration temperature is not less than 1200 DEG C, and the ring that organic principle containing chlorine thoroughly destroys by fire is fully achieved Protect effect；The second, incinerator uses pink fused alumina castable refractory, anti-HCl corrosion, guarantees that incinerator is long-term, stable operation；The Three, NaOH solution is sprayed into, the HCl gas in flue gas is removed.4th, vertical membrane wall water pipe waste heat boiler is set, meets and contains chlorine The thermal energy of high-temperature flue gas, which recycles, to be required；5th, high and low temperature two-stage cleaner is set, and the first order is cyclone separator, the second level For bag filter, make pellet content that discharge standard be fully achieved.6th, the utility model total system does not expand Section, thermal expansion are absorbed by channel bend, reduce the leakage point of system to the greatest extent, prevent HCl from leaking post-etching equipment.7th, contain chlorine Flue gas is quenched to 180 DEG C at 550 DEG C, rapidly across the temperature range of dioxin-like chemical synthesis, and sprays into quick lime in time And active carbon powder, effectively contain the synthesis of dioxin-like chemical He other harmful substances.8th, depickling spray column is set, Effectively sour gas remaining in removing flue gas.9th, SCR denitration device is set, the NO in flue gas is effectively removed_X, make NO_XContain Amount reaches emission request；Tenth, this system is also applied for the processing without chlorine salty organic waste liquid, applied widely.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the utility model；

Fig. 2 is the system flow chart of the utility model；

It is as shown in the figure: 1, to be insulated incinerator；2, vertical membrane wall water pipe waste heat boiler；3, cyclone separator；4, chilling tower； 5, Venturi；6, bag filter；7, depickling spray column；8, flue gas reheater；9, SCR denitration device；10, coal is saved Device；11, air-introduced machine；12, chimney；13, waste liquid booster pump；14, combustion fan；15, NaOH booster pump；16, combination burner； 17, drum；18, gas-distributing cylinder；19, twin shaft cooler；20, scraper slag removing machine；21, chilling spray pump；22, ash content collecting tank；23, Alkali liquid tank；24, lye spray pump；25, reducing agent booster pump；26, grid；27, thermal deaerator；28, boiler feed pump.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describing, it is clear that described embodiment is only the preferred embodiment of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

A kind of high high chlorinated waste water of saliferous as shown in Figure 1 burns environmental protection and energy saving exhaust system, is from left to right this Utility model flue gas flow and major process unit, comprising: insulation incinerator 1, vertical membrane wall water pipe waste heat boiler 2, whirlwind Separator 3, chilling tower 4, Venturi 5, bag filter 6, depickling spray column 7, flue gas reheater 8, SCR denitration device 9, economizer 10, air-introduced machine 11 and chimney 12.The front of the insulation incinerator 1 connects waste liquid booster pump 13, and the insulation is burnt The top for burning furnace 1 is equipped with combination burner 16, wherein being added has suitable auxiliary fuel and air, the insulation incinerator 1 It is divided into two sections, the entire incinerator 1 that is insulated is equivalent to one large-scale venturi, and the narrow aditus laryngis in incinerator middle and upper part is equivalent to The aditus laryngis of venturi, the top of incinerator are equivalent to the entrance of venturi, and the lower part of incinerator is equivalent to the outlet of venturi Diffuser connects lye booster pump 15 at the aditus laryngis of incinerator, and pressurization imports NaOH solution or NaOH powder, utilizes literary mound In effect, the NaOH solution or NaOH powder sprayed into its throat can produce higher suction-operated, reinforce the acid containing HCl Property gas and NaOH react and generate NaCl.Vertical membrane wall water pipe waste heat boiler 2 is set after the insulation incinerator 1, Drum 17 is arranged in the right upper portion of the vertical membrane wall water pipe waste heat boiler 2, connects gas-distributing cylinder 18 on 17 top of drum, from Gas-distributing cylinder separates two passes, and one is connected to the thermal deaerator 27 being arranged thereafter, and another leads to the use of external user Steam pipe road；Cyclone separator 3 is set after waste heat boiler 2, and the bottom end of the cyclone separator 3 is connected to scraper plate scummer 20； 3 top of cyclone separator is connected to chilling tower 4, and 4 top of chilling tower is mounted with that desalination (operating) water nozzle, desalted water pass through urgency 21 pressurization of cold water spray pump adds to the top of chilling tower 4；Venturi 5 is set after the chilling tower 4, in Venturi Solid nozzle is installed at 5 aditus laryngis, quick lime and active carbon powder can be sprayed into, the dioxin-like chemical in flue gas is prevented to close At；Bag filter 6 is set after the Venturi 5, and ash content collecting tank 22 is installed in 6 lower part of bag filter, receives Collect the solid particulate matter in flue gas；Depickling spray column 7 is arranged after the bag filter 6, circulation alkali liquor is passed through to flow from alkali liquid tank 23 It is sent to 7 top of depickling spray column after the pressurization of lye spray pump 24 after out, the flue gas because being mixed with circulation alkali liquor, after depickling Water content is very big, so removing the moisture in flue gas, and spray in depickling in 7 top layout two-stage demister of depickling spray column Spiral-flow type demister is arranged on flue after tower 7, continues to absorb the moisture in flue gas；It is equipped with after the depickling spray column 7 Flue gas reheater 8, inside are equipped with suitable burning auxiliary fuel and air；Setting SCR is de- after the flue gas reheater 8 Nitre device 9 arranges that reductant nozzle, the reductant nozzle are connected to reducing agent increasing on the flue of 9 front of SCR denitration device Press pump 25, and the flue after reductant nozzle is disposed with grid 26, is uniformly mixed flue gas with ammonia, the SCR denitration dress It sets 9 and is provided with low temperature catalyst, for removing the NO in flue gas_X；Economizer 10 is set after the SCR denitration device 9, recycles cigarette Chimney 12 is arranged after economizer 10, is mounted with air inducing on the flue between economizer 10 and chimney 12 for heat in gas Machine 11.

System flow as shown in Figure 2, in insulation 1 top arrangement combinations burner 16 of incinerator, auxiliary fuel is transported to Cell burner 16, combustion air are transported to combination burner 16 by combustion fan 14, and organic salt bearing liquid wastes containing chlorine are by waste liquid Booster pump 13 is pressed and delivered to combination burner 16, auxiliary fuel and air burning, is not less than insulation 1 upper temp of incinerator 1200℃.At this temperature, fusing is precipitated in the moisture evaporation in waste liquid, salt, and oxidation point occurs for chlorinated organics and oxygen Solution generates CO₂、H₂O、NO_X, HCl and a small amount of free state Cl₂Deng；It is insulated incinerator 1 and uses pink fused alumina castable refractory to fiery side It pours, is not reacted with the HCl in flue gas.

High-temperature flue gas enters lower part by aditus laryngis from insulation 1 top of incinerator, and NaOH solution is through booster pump 15 at aditus laryngis It is sprayed into flue gas after pressurization.Incinerator lower part flue-gas temperature is not less than 1100 DEG C, and the salt of molten state falls into incinerator in flue gas The molten salt pool of bottom, from the outflow of salt pipe is melted, into the twin shaft cooler 19 for being arranged in incinerator lower part, in twin shaft cooler 19 The salt of middle molten state is cooled into solid-state and is crushed, and falls into scraper slag removing machine 20, is sent into after cooling down once again and is packaged workshop.Flue gas from It is insulated the outlet of incinerator 1 and enters vertical membrane wall water pipe waste heat boiler 2, exchange heat in waste heat boiler with boiler water；Softened water into Enter thermal deaerator 27, it is 104 DEG C that temperature, which increases, after low-pressure steam deoxygenation, is transported to economizer by boiler feed pump 10, drum 17 is sent into after heat absorption, drum 17 and waste heat boiler ontology form circulation loop, exchange heat with high-temperature flue gas, generate saturation Steam.Saturated vapor enters gas-distributing cylinder 18, is set on gas-distributing cylinder 18 there are two steam outlet pipe road, one of them and thermal deaerator 27 Connection, another connect with external gas utilization unit.

Flue gas from vertical membrane wall water pipe waste heat boiler 2 come out after temperature be 550 DEG C, subsequently into cyclone separator 3, The ash content of greater particle size is captured down in cyclone separator 3, falls into scraper slag removing machine 20 by 3 bottom of cyclone separator.Cigarette Gas from 3 top of cyclone separator draw be sent into chilling tower 4, in chilling tower 4 with the desalted water contact heat-exchanging of penetrating, extremely short Flue-gas temperature is reduced to 180 DEG C by 550 DEG C in time, and the flue-gas temperature come out from chilling tower 4 is 180 DEG C, fills into venturi 5 are set, quick lime and active carbon powder, containment dioxin-like chemical synthesis are sprayed at 5 aditus laryngis of Venturi, and adsorb nocuousness Substance.Then flue gas enters bag filter 6, and bag filter 6 has higher trapping to imitate the ash content that partial size is 0~10 μm Rate, and the quick lime and active carbon that spray into Venturi 5 are trapped.Leave the flue gas of bag filter 6 into Enter depickling spray column 7,7 material of depickling spray column is glass reinforced plastic, using void tower form, arranges three-level spray equipment, circulation alkali altogether Liquid sprays into after being pressurizeed by lye booster pump 24, removes remaining HCl and Cl in flue gas₂, it is molten by the way that NaOH is added into alkali liquid tank Liquid adjusts the pH value of circulation alkali liquor.The flue gas come out from depickling spray column 7 carries many moisture, so in depickling spray column 7 two layers of top layout demisters, and spiral board is arranged on flue, remove the moisture carried in flue gas.

Flue gas enters flue gas reheater 8, auxiliary fuel and combustion air after coming out from depickling spray column 7 defeated by pipeline It is sent in flue gas reheater 8 and burns, the temperature of flue gas is heated to 220 DEG C from 65 DEG C.It is come out from flue gas reheater 8 Flue gas afterwards introduces SCR denitration device 9 by pipeline, and the flue in 9 front of SCR denitration device arranges reductant nozzle, in order to It is sufficiently mixed flue gas with reducing agent, grid 26 is disposed with after reductant nozzle；Mixed flue gas enters SCR denitration device 9, under the action of low temperature catalyst, by the NO in flue gas_XIt is reduced into nontoxic N₂And H₂O。

HCl, Cl from the flue gas that SCR denitration device 9 comes out₂、NO_XThe concentration of equal pollutants can meet national standard Requirement, but temperature is higher, if direct emission will cause the waste of heat, so setting economizer 10 continues recovered flue gas Heat makes flue-gas temperature be reduced to 120 DEG C, and last flue gas is sent into chimney 12 after drawing by air-introduced machine 11 and is discharged into atmosphere.

The utility model has carried out innoxious, minimizing to high concentration organic salt bearing liquid wastes containing chlorine and has handled, and has also recycled it Burn the thermal energy generated, realize environmental protection, the energy conservation object of high concentration organic salt bearing liquid wastes processing containing chlorine, not only saved the energy but also Be conducive to the protection of atmospheric environment.

In the present invention unless specifically defined or limited otherwise, term " installation ", " setting ", " connection ", " cloth Set " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly, for the common skill of this field For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of high chlorinated waste water of high saliferous burns environmental protection and energy saving exhaust system, include insulation incinerator (1), vertical membrane type Wall water pipe waste heat boiler (2), cyclone separator (3), chilling tower (4), Venturi (5), bag filter (6), depickling spray The parts such as leaching tower (7), flue gas reheater (8), SCR denitration device (9), economizer (10), air-introduced machine (11) and chimney (12), It is characterized by: the front of insulation incinerator (1) connects waste liquid booster pump (13), the top installation of insulation incinerator (1) There are combination burner (16), wherein having suitable auxiliary fuel and air, the insulation incinerator (1) is divided into two sections, It at the aditus laryngis of incinerator, connects lye booster pump (15), pressurization imports NaOH solution；It is set after the insulation incinerator (1) Vertical membrane wall water pipe waste heat boiler (2) is set, arranges drum on the top of the vertical membrane wall water pipe waste heat boiler (2) (17), gas-distributing cylinder (18) are connected on the top of drum (17), the gas-distributing cylinder separates two passes, and one is connected to and is arranged thereafter Thermal deaerator (27), another lead to external user use steam pipe road；Cyclonic separation is set after waste heat boiler (2) The bottom end of device (3), the cyclone separator (3) is connected to scraper slag removing machine (20)；Cyclone separator (3) top is connected to Chilling tower (4), chilling tower (4) top are mounted with that desalination (operating) water nozzle, desalted water pass through chilling spray pump (21) pressurization supplement To chilling tower top；Venturi (5) are set after the chilling tower (4), are equipped at the aditus laryngis of Venturi (5) Solid nozzle can spray into quick lime and active carbon powder；Bag filter (6) are set after the Venturi (5), institute State bag filter (6) lower part installation ash content collecting tank (22)；The bag filter (6) arranges depickling spray column (7) afterwards, follows Ring lye is through being sent to depickling spray column (7) top, depickling after lye spray pump (24) pressurization after alkali liquid tank (23) outflow Spray column (7) top layout two-stage demister, and spiral-flow type demister is arranged on the flue after depickling spray column (7)；It is described It is equipped with flue gas reheater (8) after depickling spray column (7), inside is equipped with suitable burning auxiliary fuel and air；It is described SCR denitration device (9) are set after flue gas reheater (8), arrange reducing agent on the flue before SCR denitration device (9) Nozzle, the original agent nozzle is connected to reducing agent booster pump (25), and the flue after reductant nozzle is provided with grid (26), The SCR denitration device (9) is provided with low temperature catalyst；The SCR denitration device (9) arranges economizer (10) afterwards, is saving coal Chimney (12) are set after device (10), air-introduced machine (11) are installed on the flue between economizer (10) and chimney (12).

2. a kind of high high chlorinated waste water of saliferous according to claim 1 burns environmental protection and energy saving exhaust system, feature Be: the furnace wall of the insulation incinerator (1) is poured using the pink fused alumina castable refractory of the resistance to chlorine corrosion of high temperature resistant, and Entire insulation incinerator (1) is equivalent to one large-scale venturi, and the narrow aditus laryngis in incinerator middle and upper part is equivalent to the larynx of venturi Mouthful, the top of incinerator is equivalent to the entrance of venturi, and the lower part of incinerator is equivalent to the outlet diffuser of venturi, utilizes Venturi effect, higher suction can be generated to the sour gas containing HCl by spraying into NaOH solution or NaOH powder in its throat Attached effect.

3. a kind of high high chlorinated waste water of saliferous according to claim 1 burns environmental protection and energy saving exhaust system, feature Be: the insulation incinerator (1) divides two sections to be arranged, and middle and lower sections are in "U" shaped, and molten salt pool is arranged in bottom, described molten Salt bottom of pond portion is connected to twin shaft cooler (19) by fused salt pipe, and the lower part of the twin shaft cooler (19) is connected to scraper plate slagging-off Machine (20), the scraper slag removing machine (20) are connected to external packing workshop.

4. a kind of high high chlorinated waste water of saliferous according to claim 1 burns environmental protection and energy saving exhaust system, feature It is: uses vertical membrane wall water pipe waste heat boiler (2), flue gas and boiler heating surface is in parallel baffled, the molten state in flue gas Salt will not put up a bridge；And by reasonably arranging heating surface, it is reduced to the flue-gas temperature in waste heat boiler (2) exit 550 DEG C or so.

5. a kind of high high chlorinated waste water of saliferous according to claim 1 burns environmental protection and energy saving exhaust system, feature Be: vertical membrane wall water pipe waste heat boiler (2) and drum (17) form natural convection loop, the drum (17) and gas-distributing cylinder (18) it connects, the softened water of addition successively enters after (10) by thermal deaerator (27), boiler feed pump (28), economizer Drum (17)；Steam outlet pipe road there are two setting on the gas-distributing cylinder (18), one of them connect with thermal deaerator (27), another It is a to be connect with external gas utilization unit.