CN208535993U - The joint emission-reducing system of multiple pollutant in a kind of incineration flue gas - Google Patents

Abstract

The joint emission-reducing system of multiple pollutant, belongs to technical field of waste treatment in a kind of incineration flue gas of the utility model.The embodiment of the utility model is that flue gas shunting unit is connected to waste incineration unit by pipeline, NO_XEmission reduction unit is set to 850~950 DEG C of temperature sections of flue gas shunting unit, flue gas after flue gas shunting unit is used to burn waste incineration unit shunts, flue gas shunting unit is connected with flue gas heat exchange unit and garbage pre-heating unit respectively, garbage pre-heating unit preheats MSW lump and absorbs the dioxin reduced in flue gas, flue gas heat exchange unit is by the heat recovery and utilization in flue gas, inhibitor adding unit includes high temperature section spray head and low-temperature zone spray head, high temperature section spray head and low-temperature zone spray head are for spraying into inhibitor solution into flue gas heat exchange unit, not only effectively reduce the content of dioxin in waste incineration flue gas and other pollutants, and the heat in flue gas is recycled, so that the more environmentally-friendly energy conservation of waste incineration.

Description

The joint emission-reducing system of multiple pollutant in a kind of incineration flue gas

Technical field

The utility model belongs to technical field of waste treatment, specifically in a kind of incineration flue gas multiple pollutant connection Close emission-reducing system.

Background technique

As urbanization process development and urban population increase, the yield of house refuse constantly increases, and handles rubbish at present There are mainly three types of modes: landfill, burning and compost.Since China's garbage disposal is started late, the past mostly uses greatly the side of landfill Formula is handled.Landfill not only takes up a large area, but also landfill leachate may pollute soil and groundwater body.With fill out It buries and compares, loss of weight, volume reduction may be implemented in waste incineration；Burning the heat generated can be recycled and generate electricity, and be China city The mainstream technology of domestic rubbish disposal.

The built garbage incinerating power plant in the country mostly uses two kinds of technologies of mechanical kiln grate furnace and fluidized bed incinerator.It is mechanical Grate furnace combustion mechanism is that rubbish is directly burnt, and entire combustion process is carried out in a burner hearth, passes through the fortune of fire grate block It is dynamic that rubbish is constantly stirred to and pushed to slag-drip opening, rubbish is subjected to thorough after-flame, rubbish by drying, burning, after-flame three phases Combustible component and harmful components in rubbish are thoroughly decomposed.Fluidized bed incinerator combustion mechanism is to utilize a large amount of high temperature substrate in furnace Material is used as heat carrier, will put into the heating of the rubbish in furnace, and makes in strong boiling stirring combustible component in rubbish and have Evil ingredient is thoroughly burned；Entire fire box temperature is evenly distributed, and is maintained at 850~900 DEG C or so, since amount of stored heat is big in furnace, Granulated garbage and bed material contact heat transfer mass transfer rate are fast.

However, it is anti-that many different, complicated chemistry can occur during handling house refuse by the way of burning It answers.This will inevitably bring some secondary pollutions, especially dioxin, heavy metal etc., and wherein dioxin is most malicious A kind of compound is difficult natural degradation elimination, its toxicity is 130 times of cyanide, arsenic once discharge is in air 900 times, there is the title of " poison in century "；It is difficult to decompose after being taken in by organism, and is concentrated and amplifies along food chain, to the mankind and Animal injury is huge, not only has carcinogenic, teratogenesis, mutagenicity, but also have endocrine.Studies have shown that Influence of the persistence organic pollutant to the mankind can continue several generations, constitute great prestige to human survival, procreation and sustainable development The side of body.According to statistics, China's city garbage burning has become the first big toxic pollutant emission source at present, and dioxin emission accounts for Total release 17%." the consumer waste incineration pollutant emission standard " revised according to 2014 second, China is all at present The concentration of dioxin need to be lower than 0.1ng-TEQ/Nm in waste incinerator discharge flue gas³, therefore, push two in waste incineration process Disliking English emission-reduction technology has very important realistic meaning.

In addition, containing a large amount of NO in garbage incinerator tail gas discharge_X；NO_XIt is a large amount of discharge can cause acid rain, photochemistry The pollution such as smog, is particularly acute the destruction of atmospheric ozone layer.Moreover, house refuse ingredient is more complex, nitrogen content 1%~ 3%, fuel type NO is generated after burning_X.Meanwhile waste incineration uses air as oxidant, the nitrogen in air can also NO can be converted into_X.It is badly in need of carrying out the NO of control waste incinerator_XThe relevant technologies for discharging, preventing secondary pollution are developed.

Through retrieving, a kind of title of innovation and creation are as follows: the method for flue gas of refuse burning multi-pollutant Collaborative Control (application Number: 201210410620.3, the applying date: 2012.10.24), program development of new composite absorption liquid and the existing absorption tower of improvement Structure, the two-stage series connection tupe using " oxidative absorption/complexing+absorption " are a variety of in efficient removal flue gas of refuse burning Pollutant, blend absorbent washing remove the SO in flue gas of refuse burning₂、HCl、HF、NO_XWith heavy metal and part dioxin.On It is limited to dioxin emission reducing effect although stating the control that technology all carries out pollutant to Refuse Incineration Process, and to NO_X Emission reduction also without specific aim, urgent need develops NO_X, dioxin cooperate with emission-reducing system, realize the emission reduction of pollutant.

In addition, the title of innovation and creation are as follows: a kind of MSW Incineration Plant flue gas wet purification processing method and dress Set (application number: 201510701688.0, the applying date: 2015.10.22), ammonium hydroxide quenching apparatus, dust last activated-carbon device and Bag filter is connected through ventilation pipe, and the air inlet end of ammonium hydroxide quenching apparatus can be with the outlet of MSW Incineration Plant flue gas End is connected, and is also connected with compressed air system, cloth bag on the ventilation pipe between ammonium hydroxide quenching apparatus and the last activated-carbon device that dusts The ash bucket of deduster has compressed air system, which is connected with flying dust library through pipeline, the exhaust pass of bag filter It is connected through pipeline with the washing concentrating section of wet type extracting tower, wet type extracting tower includes absorber portion, washing concentrating section and oxidation panel, wet The spray head that can spray ammonium hydroxide is equipped in the absorber portion of formula extracting tower, smoke discharge tube road is connected with defogging equipment, wet type depickling The oxidation panel of tower is connected with oxidation fan, ammonium chloride and ammonium sulfate delivery outlet and the crystallizer phase of the oxidation panel of wet type extracting tower Even.It is limited to dioxin emission reducing effect although this application purifies the flue gas pollutant of waste incinerator.

Utility model content

1. utility model technical problems to be solved

Utility model aims to solve a large amount of dioxin are led to the problem of in Refuse Incineration Process, one kind is provided and is burnt Burn various pollutants in fume joint emission-reducing system, by flue gas shunting unit by waste incineration unit burn after flue gas into Row shunts, a part of to enter two evils that garbage pre-heating unit is preheated and absorbed in reduction flue gas to MSW lump by pipeline English, another part enter the heat recovery and utilization in flue gas in flue gas heat exchange unit, and inhibitor adding unit is to flue gas heat exchange The generation that inhibitor solution contaminant restraining is sprayed into unit, so that the more environmentally-friendly energy conservation of waste incineration.

2. technical solution

In order to achieve the above objectives, technical solution provided by the utility model are as follows:

The joint emission-reducing system of multiple pollutant in a kind of incineration flue gas of the utility model, including waste incineration unit, Flue gas shunting unit, garbage pre-heating unit, flue gas heat exchange unit, inhibitor adding unit and NO_XEmission reduction unit, flue gas shunting list Member is connected to waste incineration unit by pipeline, NO_XEmission reduction unit is set to 850~950 DEG C of temperature sections of flue gas shunting unit, Flue gas after flue gas shunting unit is used to burn waste incineration unit shunts, the upper flue gas shunting mouth of flue gas shunting unit It is connected with flue gas heat exchange unit, the lower flue gas shunting mouth of flue gas shunting unit is connected with garbage pre-heating unit；The inhibitor adds Entering unit includes high temperature section spray head, low-temperature zone spray head and inhibitor holding vessel, and the high temperature section spray head, low-temperature zone spray head are along air-flow Direction is connected with inhibitor holding vessel respectively, and high temperature section spray head and low-temperature zone spray head are used to spray into flue gas heat exchange unit and inhibit Agent solution.

Preferably, the NO_XEmission reduction unit includes the second holding vessel, third jet pump and inhibitor spray head, second storage Tank is deposited for storing NO_XEmission reduction solution, the second holding vessel are connected through third jet pump with inhibitor spray head, the inhibitor spray Head is set to 850~950 DEG C of temperature sections of flue gas shunting unit.

Preferably, the injection direction of the inhibitor spray head is towards weather side, the injection direction and flue gas of inhibitor spray head Angle between the wall surface of the shunting air inlet pipe of dividing cell is b, b=40~70 °

Preferably, the flue gas shunting unit includes shunting air inlet pipe and shunting escape pipe, and the flue gas shunting unit is logical It crosses and is diverted into tracheae and is connected to waste incineration unit, it is horizontally disposed to shunt escape pipe, shunts air inlet pipe and shunting escape pipe is mutual Vertically；The flue gas shunting unit further includes charged section and deviates electric field section, deviates electric field section and is used for the particulate matter in flue gas Apply electric field force and the direction offset of downward flue gas shunting mouth.Charged section and deviates electric field section and be respectively arranged at point along airflow direction It flows out on tracheae, the end for shunting escape pipe is provided with baffle, and angle is between the baffle and the tube wall of upper flue gas shunting mouth The outlet for shunting escape pipe is divided into upper flue gas shunting mouth and lower flue gas shunting mouth by a, a=65~85 °, the baffle.

Preferably, the garbage pre-heating unit includes waste conveyor, seal closure and bellows；The rubbish conveys dress Set for carrying MSW lump, waste conveyor one end is provided with preheating feeding inlet, the waste conveyor other end it is pre- Hot discharge port is connected with the burning feeding inlet of waste incineration unit, and the waste conveyor upper end is enclosed with seal closure, sealing The preheated air inlet pipe of cover upper end is connected to lower flue gas shunting mouth；The shunting flue gas of lower flue gas shunting mouth in garbage pre-heating unit with MSW lump occur heat exchange, during heat exchange MSW lump in flue gas particulate matter and pollutant adsorb.

Preferably, the flue gas heat exchange unit includes U-tube and heat exchanger tube, and described U-tube one end is communicated with flue gas point Head piece, the other end are communicated with tapered dust accumulation pipe, and the upper end side wall of dust accumulation pipe is equipped with opening and is connected to dedusting appendix, dust accumulation pipe Bottom be provided with the first deduster.

Preferably, the waste incineration unit includes incinerator, burns escape pipe and burn discharge nozzle, the burning of incinerator Escape pipe is connected to flue gas shunting unit.

Preferably, the inhibitor adding unit further includes the first jet pump and the second jet pump, first jet pump It is connected with inhibitor holding vessel and high temperature section spray head, the first jet pump provides dynamic for high temperature section spray head penetrating inhibitor solution Power；Second jet pump is connected with inhibitor holding vessel and low-temperature zone spray head, and the second jet pump is the penetrating of low-temperature zone spray head Inhibitor solution provides power.

Preferably, the high temperature section spray head is set to 500~800 DEG C of temperature sections in flue gas heat exchange unit, low-temperature zone spray Head is set to 250~500 DEG C of temperature sections in flue gas heat exchange unit.

Preferably, the lower end of the bellows is communicated with preheating escape pipe, and preheating escape pipe is connected with flue gas ash removal unit, cigarette Dedusting appendix one end of gas dust removing units is connected with preheating escape pipe, and the other end is connected to the second deduster.

3. beneficial effect

Using technical solution provided by the utility model, compared with prior art, have the following beneficial effects:

(1) in a kind of incineration flue gas of the utility model multiple pollutant joint emission-reducing system, flue gas shunting unit with Waste incineration unit is connected to by pipeline, and the flue gas after flue gas shunting unit is used to burn waste incineration unit shunts, The upper flue gas shunting mouth of flue gas shunting unit is connected with flue gas heat exchange unit, the lower flue gas shunting mouth and rubbish of flue gas shunting unit Preheating unit is connected, and garbage pre-heating unit preheats MSW lump and absorbs the dioxin reduced in flue gas, flue gas heat exchange For unit by the heat recovery and utilization in flue gas, the inhibitor adding unit includes high temperature section spray head, low-temperature zone spray head and inhibition Agent holding vessel, the high temperature section spray head, low-temperature zone spray head are connected with inhibitor holding vessel respectively, high temperature section spray head and low-temperature zone Spray head not only effectively reduces dioxin in waste incineration flue gas and its for spraying into inhibitor solution into flue gas heat exchange unit Heat in flue gas is also recycled by the content of its pollutant, so that the more environmentally-friendly energy conservation of waste incineration；

(2) in a kind of incineration flue gas of the utility model multiple pollutant joint emission-reducing system, in flue gas shunting unit Charged section of middle setting and deviation electric field section are deviated the particulate matter and pollutant application charge in flue gas and by electric field, So that it is gathered in duct bottom, and garbage pre-heating unit is entered by lower flue gas shunting mouth and carries out adsorption cleaning, so that particulate matter With pollutant by garbage pre-heating unit adsorb more thoroughly, 850~950 DEG C of temperature sections spray into NO into flue gas shunting unit_XSubtract Solution is arranged, restores NO under the high temperature conditions_X, reduce the NO in flue gas_XContent, realizes while the NO of incinerator_X, dioxin Emission reduction simultaneously；

(3) in a kind of incineration flue gas of the utility model multiple pollutant joint emission-reducing system, in garbage pre-heating unit The waste conveyor of setting, waste conveyor is while conveying garbage agglomerate, so that MSW lump and containing after shunting There is the flue gas of particulate matter and pollutant load greater than 80% to carry out contact heat-exchanging, so that the particulate matter and pollutant in flue gas are by rubbish The absorption of rubbish agglomerate, reduces the content of dioxin and other pollutants in flue gas；

(4) in a kind of incineration flue gas of the utility model multiple pollutant joint emission-reducing system, in flue gas heat exchange unit The heat exchanger tube of setting can carry out the waste heat in flue gas using recycling, and heat exchanger tube is vertically installed in the airflow direction of U-tube, makes It is more preferable to obtain heat transfer effect, it is more energy saving.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas of the utility model；

Fig. 2 is the inclination angle schematic diagram of the inhibitor spray head of the utility model.

Label declaration in schematic diagram:

100, waste incineration unit；110, incinerator；130, escape pipe is burned；140, discharge nozzle is burned；150, burn into Material mouth；160, blast pipe；170, blast pipe；180, air blower；

200, flue gas shunting unit；210, air inlet pipe is shunted；220, charged section；230, deviate electric field section；240, baffle； 250, escape pipe is shunted；251, upper flue gas shunting mouth；252, lower flue gas shunting mouth；

300, garbage pre-heating unit；310, waste conveyor；320, seal closure；321, discharge port is preheated；322, it preheats Air inlet pipe；323, feeding inlet is preheated；330, bellows；340, escape pipe is preheated；341, aspiration pump；

400, flue gas heat exchange unit；410, U-tube；420, heat exchanger tube；430, dust accumulation pipe；

500, flue gas ash removal unit；510, the first deduster；520, dedusting appendix；530, the second deduster；

600, chimney；

700, inhibitor adding unit；710, inhibitor holding vessel；721, first flow valve；722, second flow valve； 731, the first jet pump；732, the second jet pump；741, high temperature section spray head；742, low-temperature zone spray head；

800、NO_XEmission reduction unit；810, the second holding vessel；820, third flow control valve；830, third jet pump；840, Inhibitor spray head.

Specific embodiment

The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model, It states, several embodiments of the utility model is given in attached drawing, still, the utility model can come real in many different forms It is existing, however it is not limited to embodiment described herein, on the contrary, purpose of providing these embodiments is makes public affairs to the utility model It is more thorough and comprehensive to open content.

It should be noted that it can directly on the other element when element is referred to as " being fixedly arranged on " another element Or there may also be elements placed in the middle；When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements；Term as used herein " vertical ", " horizontal ", " left side ", " right side " and similar statement are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model The normally understood meaning of the technical staff in domain is identical；Terminology used in the description of the utility model herein only be The purpose of description specific embodiment, it is not intended that in limitation the utility model；Term " and or " used herein includes Any and all combinations of one or more related listed items.

Embodiment 1

Referring to shown in attached drawing 1 and Fig. 2, the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas of the present embodiment, Including waste incineration unit 100, flue gas shunting unit 200, garbage pre-heating unit 300, flue gas heat exchange unit 400, flue gas ash removal Unit 500, inhibitor adding unit 700 and NO_XEmission reduction unit 800, flue gas shunting unit 200 and waste incineration unit 100 are logical Piping connection, NO_XEmission reduction unit 800 is set in flue gas shunting unit 200, NO_XEmission reduction unit 800 is used for flue gas shunting Injection urea liquid or ammonia spirit in unit 200, reduce the NO in flue gas_X, flue gas shunting unit 200 is by waste incineration list Flue gas after member 100 is burned is shunted, and part of smoke enters garbage pre-heating unit 300 by pipeline and carries out to MSW lump It preheats and absorbs the dioxin reduced in flue gas, another part flue gas enters the heat in flue gas in flue gas heat exchange unit 400 It recycles, treated that flue gas enters the progress of flue gas ash removal unit 500 for flue gas heat exchange unit 400 and garbage pre-heating unit 300 Dedusting, the flue gas after dedusting are discharged by chimney 600.

Waste incineration unit 100 in the present embodiment includes incinerator 110, burns escape pipe 130, burns discharge nozzle 140 With burning feeding inlet 150, for incinerator 110 for burning away the refuse, the downside of incinerator 110 is equipped with blast pipe 160, blast pipe 160 are communicated with blast pipe 170, and blast pipe 170 is communicated with air blower 180, air blower 180 deliver air to blast pipe 170 into And air is passed through into incinerator 110 by blast pipe 160, rubbish is carried out combustion-supporting.Incinerator 110 is by burning escape pipe 130 are connected to flue gas shunting unit 200, burn when MSW lump enters incinerator 110 from burning feeding inlet 150, produce after burning Raw flue gas enters flue gas shunting unit 200 by burning escape pipe 130, and the rubbish ashes after burning are by burning discharge nozzle 140 discharges.

Flue gas shunting unit 200 in the present embodiment includes shunting air inlet pipe 210, shunting escape pipe 250, charged section 220 With deviation electric field section 230, flue gas shunting unit 200 is connected to waste incineration unit 100 by shunting air inlet pipe 210, is distributed Tracheae 250 is horizontally disposed, shunts air inlet pipe 210 and is mutually perpendicular to escape pipe 250 is shunted, and the exit for shunting air inlet pipe 210 is set There is charged section 220, charged section 220 of exit, which is equipped with, deviates electric field section 230, the exit pipeline for deviateing electric field section 230 It is interior that outlet is divided into upper flue gas shunting mouth 251 and lower flue gas shunting mouth 252, upper flue gas shunting mouth 251 and cigarette equipped with baffle 240 Gas heat exchange unit 400 connects, and lower flue gas shunting mouth 252 is connect with garbage pre-heating unit 300.Flue gas after waste incineration enters When shunting air inlet pipe 210, deflect shunting air inlet pipe 210 with 250 junction of escape pipe is shunted, subsequently into charged section 220, particulate matter and pollutant in charged section of 220 pairs of flue gases apply positive charge, are applied the particulate matter and pollutant of positive charge Into electric field section 230 is deviateed, deviateing above electric field section 230 is anode, and lower section is cathode, is applied particulate matter and the dirt of positive charge In deviation electric field section 230 downward offset occurs for dye object, and the particulate matter and pollutant after being deviated by electric field can enter with flue gas Lower flue gas shunting mouth 252, and upper flue gas shunting mouth 251 can be entered less than 20% flue gas containing particulate matter and pollutant load, gear Plate 240 can not only play the role of water conservancy diversion, can also prevent fugitive dust.When particulate matter and pollutant are assembled under the action of electric field In the lower end for shunting escape pipe 250, lower flue gas shunting mouth 252 is connected to garbage pre-heating unit 300, sets in garbage pre-heating unit 300 Have aspiration pump 341, when aspiration pump 341 works, the flue gas of lower flue gas shunting mouth 252 can under the active force of aspiration pump 341 to Garbage pre-heating unit 300 is flowed, at this point, baffle 240 can be used for that the flue gas of flue gas shunting mouth 251 is stopped to move down.

Garbage pre-heating unit 300 in the present embodiment includes waste conveyor 310, seal closure 320 and bellows 330；Institute The waste conveyor 310 stated is provided with preheating feeding inlet 323 for carrying MSW lump, 310 one end of waste conveyor, should The preheating discharge port 321 of 310 other end of waste conveyor is connected with the burning feeding inlet 150 of waste incineration unit 100, described 310 upper end of waste conveyor is enclosed with seal closure 320, the preheated air inlet pipe 322 of 320 upper end of seal closure and lower flue gas shunting mouth 252 connections, the lower end of seal closure 320 are connected to bellows 330, and the lower end of bellows 330 is communicated with preheating escape pipe 340, are preheated out Tracheae 340 is connected with the dedusting appendix 520 in flue gas ash removal unit 500, and the middle section of preheating escape pipe 340 is equipped with aspiration pump 341.MSW lump enters waste conveyor 310, the process transported on waste conveyor 310 from preheating feeding inlet 323 In, the flue gas containing particulate matter and pollutant load greater than 80% come with the conveying of preheated air inlet pipe 322 carries out contact heat-exchanging, rubbish During by flue gas, temperature increases and adsorbs the particulate matter in flue gas and pollutant agglomerate, the rubbish group after heat exchange Block leaves the burning feeding inlet 150 that garbage pre-heating unit 300 enters waste incineration unit 100 from preheating discharge port 321.And it exchanges heat Flue gas afterwards enters preheating escape pipe 340, and the flue gas in 341 pairs of aspiration pump preheating escape pipes 340 detaches, so that flue gas can Smoothly to pass through from MSW lump, particulate matter and pollutant are preferably adsorbed, at the same time, in lower flue gas shunting mouth 252 Air-flow also will receive attraction, the air-flow for being greater than 80% containing particulate matter and pollutant under outside 252 entrance of flue gas shunting mouth Also attracted therewith, the flue gas containing particulate matter and pollutant greater than 80% is allowed to smoothly enter lower flue gas shunting mouth 252。

Flue gas heat exchange unit 400 in the present embodiment includes U-tube 410 and heat exchanger tube 420, and flue gas ash removal unit 500 wraps Include the first deduster 510, dedusting appendix 520 and the second deduster 530.The heat exchanger tube 420 is vertically installed in U-tube 410 Airflow direction, described 410 one end of U-tube is communicated with flue gas shunting mouth 251, and the other end is communicated with tapered dust accumulation pipe 430, The upper end side wall of dust accumulation pipe 430 is equipped with opening and is connected to dedusting appendix 520, and the bottom of dust accumulation pipe 430 is provided with the first dedusting Device 510, the dedusting appendix 520 are connected with the second deduster 530, second deduster far from one end of dust accumulation pipe 430 530 are communicated with chimney 600 by pipeline.When flue gas from upper flue gas shunting mouth 251 enter flue gas heat exchange unit 400 in U-tube When 410, exchange heat with the heat exchanger tube 420 being vertically installed in U-tube 410, the flue gas after heat exchange enters dust accumulation pipe 430, quilt First deduster 510 purifies, and the particulate matter in flue gas is removed by the first deduster 510, and purified flue gas passes through dedusting gas transmission Pipe 520 is mixed with the flue gas from preheating escape pipe 340, and mixed flue gas enters the second deduster 530 and carries out final dusting, Flue gas after final dusting is given off by chimney 600.

Inhibitor adding unit 700 includes high temperature section spray head 741, low-temperature zone spray head 742 and inhibitor holding vessel 710, institute High temperature section spray head 741, the low-temperature zone spray head 742 stated are connected with inhibitor holding vessel 710 respectively, and inhibitor holding vessel 710 passes through Pipeline is connected with high temperature section spray head 741, between inhibitor holding vessel 710 and high temperature section spray head 741 be equipped with first flow valve 721 and First jet pump 731, first flow valve 721 are used to adjust the uninterrupted of high temperature section spray head 741, and the first jet pump 731 is used for It pressurizes to inhibitor；Inhibitor holding vessel 710 is connected by pipeline with low-temperature zone spray head 742 simultaneously, inhibitor holding vessel Second flow valve 722 and the second jet pump 732 are equipped between 710 and low-temperature zone spray head 742, second flow valve 722 is for adjusting The uninterrupted of low-temperature zone spray head 742, the second jet pump 732 is for pressurizeing to inhibitor；Inhibitor holding vessel 710 is height Temperature section spray head 741 and low-temperature zone spray head 742 provide inhibitor solution；High temperature section spray head 741 and low-temperature zone spray head 742 are used for cigarette Spray into inhibitor solution in gas heat exchange unit 400, the high temperature section spray head 741 be set in flue gas heat exchange unit 400 500~ 800 DEG C of temperature sections are that 500~800 DEG C of temperature sections spray into inhibitor solution into flue gas heat exchange unit 400 in flue-gas temperature； The high temperature section spray head 741 is provided with 4-20, this implementation is set as 8, and high temperature section spray head 741 is set to flue gas heat exchange list Inside member 400, high temperature section spray head 741 is uniformly arranged on 400 inner wall of flue gas heat exchange unit；Low-temperature zone spray head 742 is set to 250-500 DEG C of temperature section in flue gas heat exchange unit 400；The temperature section that the preferred high temperature section spray head 741 of the present embodiment is arranged is 600 ~700 DEG C, the temperature section that preferably low-temperature zone spray head 742 is arranged is 300~400 DEG C.The inhibitor solution be urea liquid, The inhibitor solution containing Ammonia group such as ammonia spirit, while being also possible to the solution containing alkalinity, such as calcium hydroxide is molten Liquid, can also be with the inhibitor solution that the mixture of various inhibitors solution, the present embodiment use for urea liquid.

The NO of the present embodiment_XEmission reduction unit 800 includes inhibitor spray head 840, and inhibitor spray head 840 is set to flue gas shunting Inside unit 200, inhibitor spray head 840 is for spraying into NO into flue gas shunting unit 200_XEmission reduction solution, inhibitor spray head 840 850~950 DEG C of temperature sections of flue gas shunting unit 200 are set to, i.e., are 850~950 DEG C of temperature sections to flue gas in flue-gas temperature NO is sprayed into dividing cell 200_XEmission reduction solution, the present embodiment preferably 880~920 DEG C of temperature sections；The inhibitor spray head 840 4-30 are provided with, the present embodiment preferably 20, inhibitor spray head 840, which is uniformly arranged in, to be shunted on 210 inner wall of air inlet pipe.Value It must illustrate: NO_XEmission reduction unit 800 includes the second holding vessel 810, third flow control valve 820,830 and of third jet pump Inhibitor spray head 840, second holding vessel 810 is for storing NO_XEmission reduction solution, the second holding vessel 810 is through third jet pump 830 Be connected with inhibitor spray head 840, third flow control valve 820 be set to third jet pump 830 and the second holding vessel 810 it Between, third jet pump 830 is that inhibitor spray head 840 provides power, NO_XEmission reduction solution is urea liquid or ammonia spirit, sheet Embodiment is ammonia spirit.The NO in ammonia and flue gas under 850~950 DEG C of hot conditions, in ammonium hydroxide_XReaction, and by NO_X Reduction generates N₂Etc. free of contamination gas, to reduce the NO in flue gas_XDischarge；And then it realizes while incinerator NO_X, dioxin coordination emission reduction.

Waste incineration is to generate the more production unit of dioxin pollution object, and dioxin mechanism of production mainly has high temperature Gas phase reaction generates and low temperature heterogeneous catalytic reaction generates.Either which kind of waste incinerator all has dioxin generation Most of condition: (1) organochlorine and inorganic chlorine component of the chlorine in garbage raw material；(2) carbon source is in uncombusted flying dust, Macromolecular carbon (coke, active carbon, carbon black etc.) in such as chlorophenol, chlorobenzene or Polychlorinated biphenyls predecessor and flying dust；(3) it has Deformation and vacant graphite-structure, butter, copper and iron metal ion, as catalyst；(4) oxidizing atmosphere, and burn It burns and there are 250~500 DEG C of temperature ranges (low temperature heterogeneous catalytic reaction) and 500~800 DEG C for generating dioxin in furnace flue Temperature range (high temperature gas phase reaction).In addition, de novo formation reaction is the dominant mechanism that burning process dioxin generates.

500~800 DEG C be dioxin high―temperature nuclei reaction main section, humidity province of the flue-gas temperature at 500-800 DEG C Between when, predecessor or larger molecular organics in flue gas by a series of chemical reaction and synthesize dioxin, high temperature section spray First 741 spray into inhibitor solution into flue gas heat exchange unit 400 in flue-gas temperature for 500-800 DEG C of temperature section, and flue-gas temperature exists When 250~500 DEG C of temperature ranges, low-temperature zone spray head 742 sprays into inhibitor solution into flue gas heat exchange unit 400；The present embodiment Inhibitor solution is urea liquid, and the urea in urea liquid is thermally decomposed to generate Ammonia substance, in Ammonia substance and flue gas Predecessor reaction, inhibits predecessor to synthesize dioxin, or anti-with the metal and metal oxide as catalyst in flue gas Activity is answered, the activity of catalyst is inhibited, thus the pyroreaction for inhibiting dioxin to synthesize.Moreover, the urea in urea liquid Ammonia substance is thermally decomposed to generate, Ammonia substance can be in conjunction with the carbon residue of ash surface, and occupies the active position on carbon residue surface, So that the organic matter that will synthesize dioxin transfers to synthesize the itrogenous organic substance of similar structure, to reduce in flue gas persistently The toxicity and harm of property organic matter；And Ammonia substance is reacted with HCl, reduces the chlorine source of dioxin synthetic reaction, it is suppressed that two The synthesis of English is disliked, and then inhibits the synthesis of dioxin in flue gas, reduces the generation of dioxin, and then realize burning process In dioxin emission reducing.

The workflow of the equipment of the present embodiment is as follows: MSW lump enters waste incineration unit from feeding inlet 150 is burned It is burned in 100 incinerator 110, the rubbish ashes after burning are discharged by burning discharge nozzle 140, the cigarette generated after burning Gas enters the shunting air inlet pipe 210 of flue gas shunting unit 200 by burning escape pipe 130, then enters and shunts air inlet pipe 210 Vertically disposed shunting escape pipe 250, while the inhibitor spray head 840 in air inlet pipe 210 is shunted into flue gas shunting unit 200 Spray into NO_XEmission reduction solution.Flue gas is during entering shunting escape pipe 250, in vertical corner, due to particulate matter and pollution The quality of object is greater than gas, so particulate matter and pollutant can enter in pipeline after turn with respect to a side on the lower, and it is laggard Enter charged section 220.In charged section 220, particulate matter and pollutant can be loaded positive charge, be loaded positive charge particulate matter and Pollutant is swept along the effect downward bias into deviation electric field section 230, in deviateing electric field section 230 by electric field force by flue gas It moves, the lower end for shunting escape pipe 250 is then deposited in, into lower flue gas shunting mouth 252.And shunt the upper end of escape pipe 250 Upper flue gas shunting mouth 251 can be entered containing the less flue gas of particulate matter and pollutant.

It, can be by garbage pre-heating list into the flue gas for being greater than 80% containing particulate matter and pollutant in lower flue gas shunting mouth 252 The MSW lump that waste conveyor 310 conveys in member 300 is adsorbed and is exchanged heat, and the MSW lump for not only treating burning carries out Heating, greatly reduces particulate matter and pollutant in flue gas, and the purified flue gas that exchanged heat enters dedusting appendix 520.Into the flue gas less containing particulate matter and pollutant of upper flue gas shunting mouth 251, subsequently enter in flue gas heat exchange unit 400 U-tube 410, exchange heat with the heat exchanger tube 420 being arranged in U-tube 410, the high temperature being arranged in flue gas heat exchange unit 400 Section spray head 741 is that 500~800 DEG C of temperature sections spray into inhibitor solution, flue gas temperature into flue gas heat exchange unit 400 in flue-gas temperature For degree in 250~500 DEG C of temperature ranges, low-temperature zone spray head 742 sprays into inhibitor solution into flue gas heat exchange unit 400, inhibits The generation of dioxin.Flue gas after heat exchange enters dust accumulation pipe 430, is purified by the first deduster 510, and the particulate matter in flue gas is by One deduster 510 removes, and purified flue gas is mixed by dedusting appendix 520 with the flue gas from preheating escape pipe 340, mixes Flue gas after conjunction enters the second deduster 530 and carries out final dusting, and the flue gas after final dusting is given off by chimney 600.

Certain embodiment of the utility model above described embodiment only expresses, the description thereof is more specific and detailed, But it should not be understood as limiting the scope of the patent of the utility model；It should be pointed out that for the common of this field For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to In the protection scope of the utility model；Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.

Claims (10)

1. the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas, it is characterised in that: including waste incineration unit (100), flue gas shunting unit (200), garbage pre-heating unit (300), flue gas heat exchange unit (400), inhibitor adding unit (700) and NO_XEmission reduction unit (800), flue gas shunting unit (200) are connected to waste incineration unit (100) by pipeline, NO_XSubtract Row unit (800) is set to 850~950 DEG C of temperature sections of flue gas shunting unit (200), flue gas shunting unit (200) for pair Waste incineration unit (100) burn after flue gas shunted, the upper flue gas shunting mouth (251) of flue gas shunting unit (200) with Flue gas heat exchange unit (400) is connected, the lower flue gas shunting mouth (252) of flue gas shunting unit (200) and garbage pre-heating unit (300) It is connected；The inhibitor adding unit (700) includes high temperature section spray head (741), low-temperature zone spray head (742) and inhibitor holding vessel (710), the high temperature section spray head (741), low-temperature zone spray head (742) along airflow direction respectively with inhibitor holding vessel (710) phase Even, high temperature section spray head (741) and low-temperature zone spray head (742) are used to spray into inhibitor solution into flue gas heat exchange unit (400).

2. the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas according to claim 1, it is characterised in that: institute State NO_XEmission reduction unit (800) includes the second holding vessel (810), third jet pump (830) and inhibitor spray head (840), this second Holding vessel (810) is for storing NO_XEmission reduction solution, the second holding vessel (810) is through third jet pump (830) and inhibitor spray head (840) it is connected, the inhibitor spray head (840) is set to 850~950 DEG C of temperature sections of flue gas shunting unit (200).

3. the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas according to claim 1, it is characterised in that: institute The injection direction of inhibitor spray head (840) is stated towards weather side, the injection direction and flue gas shunting unit of inhibitor spray head (840) (200) angle between the wall surface of shunting air inlet pipe (210) is b, b=40~70 °.

4. the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas according to claim 1, it is characterised in that: institute Stating flue gas shunting unit (200) includes shunting air inlet pipe (210) and shunting escape pipe (250), the flue gas shunting unit (200) It is connected to by shunting air inlet pipe (210) with waste incineration unit (100), shunts escape pipe (250) and be horizontally disposed with, shunt air inlet pipe (210) it is mutually perpendicular to shunting escape pipe (250)；The flue gas shunting unit (200) further includes charged section (220) and deviates electric Field section (230) deviates electric field section (230) and is used to apply the particulate matter in flue gas electric field force and downwards flue gas shunting mouth (252) Direction offset；Charged section (220) and deviation electric field section (230) are respectively arranged at along airflow direction to be shunted on escape pipe (250), The end for shunting escape pipe (250) is provided with baffle (240), the tube wall of the baffle (240) and upper flue gas shunting mouth (251) it Between angle be a, the outlet for shunting escape pipe (250) is divided into upper flue gas shunting mouth by a=65~85 °, the baffle (240) (251) and lower flue gas shunting mouth (252).

5. the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas according to claim 1, it is characterised in that: institute Stating garbage pre-heating unit (300) includes waste conveyor (310), seal closure (320) and bellows (330)；The rubbish is defeated Device (310) are sent to be provided with preheating feeding inlet (323), the rubbish for carrying MSW lump, waste conveyor (310) one end Burning feeding inlet (150) phase of the preheating discharge port (321) of conveying device (310) other end and waste incineration unit (100) Even, waste conveyor (310) upper end is enclosed with seal closure (320), the preheated air inlet pipe of seal closure (320) upper end (322) it is connected to lower flue gas shunting mouth (252)；The shunting flue gas of lower flue gas shunting mouth (252) is in garbage pre-heating unit (300) With MSW lump occur heat exchange, during heat exchange MSW lump in flue gas particulate matter and pollutant inhale It is attached.

6. the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas according to claim 1, it is characterised in that: institute Stating flue gas heat exchange unit (400) includes U-tube (410) and heat exchanger tube (420), and the heat exchanger tube (420) is vertically installed in U-tube (410) airflow direction, described U-tube (410) one end are communicated with flue gas shunting mouth (251), and the other end is communicated with tapered Dust accumulation pipe (430), the upper end side wall of dust accumulation pipe (430) are equipped with opening and are connected to dedusting appendix (520), dust accumulation pipe (430) Bottom is provided with the first deduster (510).

7. the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas according to claim 1, it is characterised in that: institute It states waste incineration unit (100) to include incinerator (110), burn escape pipe (130) and burn discharge nozzle (140), incinerator (110) burning escape pipe (130) is connected to flue gas shunting unit (200).

8. the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas according to claim 1, it is characterised in that: institute Stating inhibitor adding unit (700) further includes the first jet pump (731) and the second jet pump (732), first jet pump (731) it is connected with inhibitor holding vessel (710) and high temperature section spray head (741), the first jet pump (731) is high temperature section spray head (741) it sprays into inhibitor solution and power is provided；Second jet pump (732) and inhibitor holding vessel (710) and low-temperature zone are sprayed Head (742) is connected, and the second jet pump (732) sprays into inhibitor solution for low-temperature zone spray head (742) and provides power.

9. the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas according to claim 1, it is characterised in that: institute State 500~800 DEG C of temperature sections that high temperature section spray head (741) is set in flue gas heat exchange unit (400), low-temperature zone spray head (742) 250~500 DEG C of temperature sections being set in flue gas heat exchange unit (400).

10. the joint emission-reducing system of multiple pollutant in a kind of incineration flue gas according to claim 5, it is characterised in that: The lower end of the bellows (330) is communicated with preheating escape pipe (340), and preheating escape pipe (340) is connected with flue gas ash removal unit (500), dedusting appendix (520) one end of flue gas ash removal unit (500) with preheating escape pipe (340) be connected, the other end with Second deduster (530) connection.