CN108525489A - Coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant based on eddy heating for heating Yu aspiration method - Google Patents
Coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant based on eddy heating for heating Yu aspiration method Download PDFInfo
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- CN108525489A CN108525489A CN201810316372.3A CN201810316372A CN108525489A CN 108525489 A CN108525489 A CN 108525489A CN 201810316372 A CN201810316372 A CN 201810316372A CN 108525489 A CN108525489 A CN 108525489A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B01D2251/2062—Ammonia
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Abstract
The present invention discloses a kind of coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant based on eddy heating for heating Yu aspiration method, the cleaning plant utilizes the dissolubility of ammonium hydrogen sulfate in water and strong electric conductivity, ammonium hydrogen sulfate is heated using current vortex, accelerates its dissolving, is used in combination air water is dual-purpose to be pumped out；Cleaning plant includes ceramic cylinder, and ceramic cylinder inner wall send aquaporin, ceramic drum outer wall one end fixed range sensor, ceramic tube inner chamber that thermal insulation ceramics cylinder is fixedly mounted；Thermal insulation ceramics cylinder one ends wound induction coil, the other end are connect by conduit with water/gas dual-purpose pump；Aquaporin is sent to connect with ceramic cylinder inner wall by conduit in water pump one end；After ceramic cylinder, thermal insulation ceramics cylinder, induction coil, water pump, water/gas dual-purpose pump, range sensor are fixedly mounted, it is fixedly mounted on Bit andits control working platform table top by clamp device.The present invention can realize the cleaning of coal-burning power plant's flue hydrogen sulfate ammonia, and cleaning efficiency is high, clears up thorough noresidue, environmental protection and saving.
Description
Technical field
The invention belongs to Instrument Science and Technology, control science, material science, calorifics, electric system, boiler and application
A kind of field, and in particular to coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant based on eddy heating for heating Yu aspiration method.
Background technology
In China during rapid economic development, the energy consumption structure based on coal resources, thermal power generation are formd
It is the chief component in China power plant, even if new energy fast-developing more than ten years, thermoelectricity still account for China's hair at present
60% or more of electric total amount.Firepower electrical plant relies primarily on coal fired power generation, during burning coal, will produce a large amount of flue dust,
Carbon dioxide, sulfur dioxide etc., these emissions can lead to the atmosphere pollution phenomenon such as haze, climate warming, acid rain, to the mankind's
Life and health causes huge threat.Since the seventies in last century, developed country begins to the desulfurization of research industrial smoke
Method, in recent years, the environmental pollution phenomenon brought with China's rapid economic development start gradually to highlight, and the Chinese government starts to add
The prevention of big environmental pollution, the desulfurization denitration method of industrial smoke also begin to be enriched.
The Flue Gas Control Technology of coal-burning boiler is divided into Combustion System and flue gas desulfurization and denitrification two major classes, Combustion System it is basic
Principle is to form reducing atmosphere in coal dust firing region, reduces NOxProduction quantity；Flue gas desulfurization and denitrification technology usually first selects
Gas denitrifying technology remove smoke in NOx, then using plus limestone-gypsum method purifying smoke in SO2Denitrating flue gas skill
Art is broadly divided into SNCR (selective non-catalytic reduction method) and two kinds of SCR (selective catalytic reduction).SNCR principles are to utilize
NH3With the NO in flue gasxReduction reaction occurs at high temperature, SCR is then to make NH under the effect of the catalyst3With the NO in flue gasx
Reduction reaction occurs at low temperature.SNCR is practical simultaneously infrequently to answer there are denitration efficiency is low and the drawbacks such as reaction temperature window narrows
With, and SCR is the denitration technology that the unique large-scale commercial in current coal-burning power plant is promoted, and is mainly had the advantage that：
● desulfuration efficiency is high, and since SCR is to carry out gas-gas with ammonia through flue gas to react, the two contact area is big, reaction effect
Rate is up to 90% or more；
● device is simple, and SCR device only has absorption tower, oxidation trough, air-introduced machine etc., and Operation and Maintenance is simple；
● there is byproduct economic value, the ammonium sulfate that SCR technology obtains can do fertilizer application, both have economic value,
Also reduce the pollution to environment.
The principle of SCR method is to spray into reducing agent (such as ammonia to tail flue (being located above SCR catalyst) by ammonia-spraying grid
Gas, urea etc.), under the action of vanadium Ti-base catalyst by the NOx conversion in flue gas be water and nitrogen.Usually by urea pyrolysis or
Hydrolysis of urea produces ammonia, then by being passed through in the flue gas of back-end ductwork after Dilution air.In SCR reactors, NOx is (main
To include NO and NO2) and ammonia occur key reaction such as formula (1)~(4)：
4NH3+4NO+O2=6H2O+4N2 (1)
4NH3+ 6NO=6H2O+5N2 (2)
4NH3+2NO2+O2=6H2O+3N2 (3)
8NH3+6NO2=12H2O+7N2 (4)
Higher oxynitride removal efficiency may be implemented in SCR, but in the ammonia for being passed through back-end ductwork, some
Have little time to act on and escape outward with flue gas, while in denitrification process, the part SO in flue gas2It can be in catalyst active component
Catalytic action under generate SO3, the ammonia and SO of escape3It chemically reacts, generates ammonium sulfate (AS) and ammonium hydrogen sulfate (ABS),
Chemical formula is (5)~(6)：
2NH3+H2O+SO3=(NH4)2SO4 (5)
NH3+H2O+SO3=NH4HSO4 (6)
It is more studies have shown that during SCR method desulphurization denitrations, the generating rate of ABS is far above AS, in practical coal-burning power plant
In operation, the production quantity of ABS is also far above AS, and the physical characteristic of ammonium hydrogen sulfate is as shown in table 1：
1 hydrogen sulfate ammonia physical characteristic of table
There is extremely strong stickiness, solution to have certain acidity and hygroscopicity, therefore ammonium hydrogen sulfate after ammonium hydrogen sulfate fusing
Harm is very extensive caused by being run to boiler of power plant, not only harmful to SCR catalyst, while also to the fortune of air preheater
Row and boiler is granular material discharged has a major impact.Maximum harm is to form blocking, and ammonium hydrogen sulfate can change flying dust
Property causes particle size of fly ash to increase, and with the increase of ammonium hydrogen sulfate, the hygroscopicity of flying dust rises, and adhesiveness improves.When in flue gas
When fly ash content is less, soot particle can only absorbed portion ammonium hydrogen sulfate drop, with the increase of ash content, ammonium hydrogen sulfate can be complete
It is adsorbed on soot particle, the stickiness of soot particle is significantly increased at this time, is easy to be bonded in air preheater surfaces, causes to block.
Blockage problem is solved through the method frequently with hot water injection in coal-burning power plant's practical application, including on-line rinsing and is stopped
Machine rinses two kinds.Since hydrogen sulfate ammonia viscosity is big, firmly it is adsorbed on original paper, on-line rinsing can only wash out the dust stratification on surface, difficult
To obtain better cleaning effect.It can also be used in coal-burning power plant's actual motion and shut down flushing scheme, be rinsed with water table
After the dust stratification in face, the method for further using chemical reagent to impregnate disposes ammonium hydrogen sulfate, but shuts down to rinse and need based on scheduling
It draws and carries out, influence generating efficiency.In addition, water flushing scheme must also use a large amount of hot water, a large amount of manpower and materials are consumed.Cause
If this can invent a kind of ammonium hydrogen sulfate cleaning plant of environment-friendly high-efficiency, have a very important significance.
Invention content
To solve the problems, such as the existing ammonium hydrogen sulfate Removal Technology of thermal power plant, the purpose of the present invention is to provide one
Coal-burning power plant flue hydrogen sulfate ammonia cleaning plant of the kind based on eddy heating for heating Yu aspiration method, principle are using ammonium hydrogen sulfate in water
In dissolubility and electric conductivity, it is heated in the surface spray water of ammonium hydrogen sulfate, and using vortex, accelerates ammonium hydrogen sulfate
Dissolving, become fluid, then by way of aspiration, will be cleared on its object from adherency.The cleaning plant
Form be：Installation water spray, heating and soaking gas equipment on movable working platform, water injector are sprayed to hydrogen sulfate ammonia crystal
Water forms conductive hydrogen sulfate ammonia spirit, alternating current is passed in heating coil, generate alternating magnetic field, in hydrogen sulfate
Vortex is formed in ammonia solution, makes ammonium hydrogen sulfate rapid melting.Due to Kelvin effect, solution temperature rapid increase, and meanwhile it is high-power
Aspiration equipment draws discharge hydrogen sulfate ammonia, therefore device can rapidly and efficiently place cleaning；As surface solution is extracted, water
It pours on the hydrogen sulfate ammonia crystal of lower layer, further carries out heating suction process, it is ensured that clear up thorough noresidue；Simultaneously only
Need a small amount of water, also meet environmental requirement while saving resource, the hydrogen sulfate ammonia of discharge can secondary operation at fertilizer, save money
Source is increased economic efficiency.
The present invention adopts the following technical scheme that realize：
Coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant based on eddy heating for heating Yu aspiration method, the cleaning plant include ceramics
Cylinder, range sensor, water pump, water/gas dual-purpose pump and displacement control system；Wherein, in ceramic pipe wall there are one sending aquaporin,
Thermal insulation ceramics cylinder is installed with inside ceramic cylinder, thermal insulation ceramics cylinder is arranged with sense for heating in one end close to working face
Coil is answered, gap is equipped between ceramic cylinder inner wall and thermal insulation ceramics drum outer wall, heat-barrier material is filled in gap；Range sensor
It is installed on the one end of ceramic cylinder close to working face；Water pump one end send aquaporin to connect by conduit in ceramic pipe wall, separately
One end is connect with water source, and water pump is used for working face injection water；Water/gas dual-purpose pump one end is connected by conduit and thermal insulation ceramics cylinder
It connects, the other end is placed in retracting device, and water/gas dual-purpose pump is used to extract the solution on discharge working face；Displacement control system packet
Support construction, guide rail and the work top for including pedestal and being successively set on from bottom to top on pedestal are used to adjust cleaning dress
Set the distance between working face.
The present invention, which further improves, to be, further includes the variable-frequency power sources for powering to induction coil, induction coil
Diameter is less than the gap between thermal insulation ceramics drum outer wall and ceramic cylinder, and heat-barrier material and waterproof coating are covered with outside induction coil,
The heat-barrier material uses rare-earth thermal insulating coating.
The present invention, which further improves, to be, thermal insulation ceramics cylinder and the outer surface of induction coil entirety are coated with outer housing,
Outer housing inside sidewalls offer the opening for connecting induction coil and variable-frequency power sources conducting wire.
The present invention, which further improves, to be, further includes the microprocessor for controlling pump working.
The present invention further improve is, range sensor be ultrasonic distance sensor or infrared distance sensor,
Range sensor is mounted on ceramic cylinder lower part, is aligned close to one end of working face with ceramic cylinder, and range sensor is solid with ceramic cylinder
Fixed connection, and range sensor is also connect with microprocessor.
The present invention, which further improves, to be, ceramic cylinder is fixedly connected with thermal insulation ceramics cylinder both ends by connection structure, and
Bindiny mechanism is made of heat proof material.
The present invention, which further improves, to be, ceramic cylinder is placed on work top, is connected by two tight loops, and two tight
Gu Quan is respectively placed at ceramic cylinder length direction 1/4 and 3/4.
The present invention, which further improves, to be, conduit uses anti-watertight with ceramic cylinder junction, conduit and water pump junction
Sealing seals, and conduit is with ceramic cylinder junction, conduit and water/gas dual-purpose pump junction using corrosion-resistant, refractory seals glue is close
Envelope, conduit have been externally wrapped with heat-barrier material.
The present invention, which further improves, to be, the heat-barrier material between ceramic cylinder inner wall and thermal insulation ceramics drum outer wall is using multiple
Close silicate.
The present invention, which further improves, to be, the course of work is：Soaking gas equipment is vortexed close to working face, range sensor is surveyed
Amount system is measured and is adjusted at a distance from cleaning plant and working face with displacement control system, and the water that water pump sprays is made just to reach work
Make face；
The ammonium sulfate deposited on working face forms ammonium bisulfate solution with ammonium hydrogen sulfate, becomes conductor, is produced in induction coil
Raw strong alternating magnetic field, the alternating magnetic field form vortex, ammonium bisulfate solution temperature rise, due to becoming in ammonium bisulfate solution
Skin effect rises on working face close to the solution temperature of ceramic cylinder, accelerates the dissolving of ammonium hydrogen sulfate；
After working face forms liquid, water/gas dual-purpose pump forms negative pressure on working face, extracts ammonium bisulfate solution and passes through
Conduit is emitted into retracting device.
The present invention has following beneficial technique effect：
Coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant based on eddy heating for heating and aspiration method of the present invention is made pottery by being arranged
Thermal insulation ceramics cylinder is arranged in the inner cavity of porcelain cylinder, ceramic cylinder, and thermal insulation ceramics cylinder is close to the one ends wound heating coil of working face, ceramic cylinder
Aquaporin is sent in tube wall setting.By the hydrogen sulfate ammonia spray water for sending aquaporin to adhere to on working face, since ammonium hydrogen sulfate is readily soluble
In water characteristic (at 20 DEG C be 1:1), hydrogen sulfate ammonia accumulation layer surface quickly forms ammonium hydrogen sulfate aqueous solution, and hydrogen sulfate ammonium hydroxide is molten
Liquid is conductive, the alternating magnetic field that the heating coil wound on heat insulating ceramic pipe generates under the action of power supply, in aqueous solution
Middle generation eddy current effect, aqueous temperature increase rapidly, and the solubility of hydrogen sulfate ammonia in water also increases therewith.Temperature is more than
After 100 DEG C, water is begun to boil off, while hydrogen sulfate ammonia crystal starts liquefaction and softens, and hydrogen sulfate ammonia, the sulphur of softening are formed in working face
The three-phase mixture of sour hydrogen ammonia spirit, vapor.Temperature is more than after 145 DEG C, and hydrogen sulfate ammonia crystal starts to liquefy, due to liquid
The strong electric conductivity of ammonium hydrogen sulfate, further enhances the electric conductivity of solution, and eddy current effect is enhanced, and rate of rise in temperature adds
Soon, while high-power gas-liquid dual-purpose pump extracts air to one end far from working face, is formed very on the mixture surface of working face
Strong negative pressure, under the action of negative pressure mixture be drawn to thermal insulation ceramics tube cavity, due to the strong electric conductivity of mixture, heat-insulated pottery
Magnetic field inside porcelain tube continues to heat to mixture, and the hydrogen sulfate ammonia solid softened in mixture further liquefies, and reduces mixed
The adhesion of object is closed, under the action of gas/liquid dual-purpose pump, mixture flows outward along conduit.With face surface liquid
Loss, and can repeat aqueous solution heating extraction process.Since the present invention is using in solid-state hydrogen sulfate ammonia and dissolving circle
Face forms electric conductor, and the vortex formed in electric conductor by alternating magnetic field heats hydrogen sulfate ammonia, with traditional biography
It leads heating to compare, eddy heating for heating temperature rise is exceedingly fast, therefore apparatus of the present invention are fast with heating speed, it is fast to extract speed, clear up
Rapidly and efficiently the characteristics of.
When being passed through alternating current in the heating coil wound on thermal insulation ceramics cylinder, coil just generates alternating magnetic field.Due to
Aqueous solution on working face is current conductor, then the liquid conductor being among heating coil can be equivalent to one in circumferencial direction
The closed circuit of circle is enclosed, due to the effect of alternating magnetic field, the magnetic flux in closed circuit is constantly changing, so in liquid
The circumferencial direction of conductor will produce induced electromotive force, and induced electromotive force can generate induced current, the side of electric current in liquid conductor
It turn-takes to the circumferencial direction along conductor, which is known as being vortexed.Vortex inside liquid conductor will produce heat, conductor it is outer
Around it is longer, the frequency of alternating magnetic field is higher, and the resistivity of conductor is smaller, then is vortexed stronger, and the heat of generation is higher.The present invention
In, it is strong electric conductivity to be in liquid sulfuric acid hydrogen ammonia due to hydrogen sulfate ammonia spirit, under the action of strong alternating magnetic field, in solution
Very high temperature can be generated, therefore apparatus of the present invention can ensure that the hydrogen sulfate ammonia crystal on working face liquefies completely, and be taken out
Discharge is taken, has the characteristics that the thorough noresidue of cleaning.
The flow and displacement control system of apparatus of the present invention, core are microprocessor circuit and program.Due to the injection of water
Apart from the flow velocity depending on water in device by water pump, therefore the functional relation between water injection distance and flow velocity can be calculated,
Function is using the flow velocity of water as independent variable, using jet length as dependent variable, in the microprocessor by function storage.The present invention clears up
Device when in use, is arranged water pump flow velocity and the flow speed value of setting is sent to microprocessor, microprocessor calls distance and stream
Fast function is calculated, obtain water under the flow velocity just spray to work distance, Range Measurement System measure present apparatus with
The distance between working face is simultaneously sent to microprocessor, and microprocessor carries out calculated distance value and the distance value measured
Compare, and cleaning plant is moved to by best effort distance by displacement control system, water injection is formed on working face at this time
Hydrogen sulfate ammonia spirit both relatively will not closely be sputtered because of distance, will not because of distance compared with far from arrival working face,
A small amount of water is only needed when work, therefore the present apparatus also can guarantee cleaning effect while saving water resource.
Description of the drawings
Fig. 1 is coal-burning power plant's flue ammonium hydrogen sulfate cleaning plant structural frames based on eddy heating for heating Yu aspiration method of the present invention
Figure；
Fig. 2 is the ammonium hydrogen sulfate cleaning plant structural schematic diagram of the present invention；
Fig. 3 is displacement and the flow control block diagram of the present invention.
Wherein, 1- ceramic cylinders, 2- thermal insulation ceramics cylinders, 3- heating coils, 4- water pumps, 5- water/gas dual-purpose pumps, 6- Distance-sensings
Device, 7- pedestals, 7-1- work tops, 7-2- guide rails, 7-3- support constructions, 8- conduits, 8-1- conduits, 9- connection structures, 10- are tight
Gu Quan, 11- heat-barrier material, 12- ammonium bisulfate solutions, 13- working faces, 14- outer housings.
Specific implementation mode
The present invention is described in further detail for the embodiment provided below in conjunction with attached drawing and inventor.
As depicted in figs. 1 and 2, coal-burning power plant's flue hydrogen sulfate ammonia provided by the invention based on eddy heating for heating Yu aspiration method
Cleaning plant, the device utilize the dissolubility and electric conductivity of ammonium hydrogen sulfate in water, with toward ammonium hydrogen sulfate surface spray water, and adopt
It is heated with vortex, to become fluid, and is sucked out by aspiration effect, body surface covering is removed to realize
Ammonium hydrogen sulfate, including ceramic cylinder 1,1 tube wall of ceramic cylinder is interior, and there are one send aquaporin, 1 inside of ceramic cylinder that thermal insulation ceramics are fixedly mounted
Cylinder 2,2 one end of thermal insulation ceramics cylinder are arranged with heating coil 3 for heating, between 2 outer wall of 1 inner wall of ceramic cylinder and thermal insulation ceramics cylinder
There is a gap, filling with insulation material 11 between gap, ceramic cylinder 1 is fixedly connected with 2 both ends of thermal insulation ceramics cylinder by connection structure 9,
Bindiny mechanism 9 is made of heat proof material.Aquaporin is sent to be connect with 4 one end of water pump by conduit 8 in 1 tube wall of ceramic cylinder, water pump 4
The other end connect with water source, water pump 4 is used for working face injection water.2 one end of thermal insulation ceramics cylinder passes through conduit 8-1 and water/gas
Dual-purpose pump 5 connects, and 5 other end of water/gas dual-purpose pump is placed in by conduit in retracting device, and the effect of water/gas dual-purpose pump 5 is to extract
The liquid solution on working face 13 is discharged.Heating coil 3 is wound in thermal insulation ceramics cylinder 2 close to one end of working face 13, heater wire
The gap that 3 diameters are less than between 2 outer wall of thermal insulation ceramics cylinder and ceramic cylinder 1 is enclosed, heat-barrier material 11 and waterproof are covered outside heating coil 3
Coating.Conduit 8 is sealed with 4 junction of water pump using waterproof gasket cement with 1 junction of ceramic cylinder, conduit 8, conduit 8-1 and ceramics
2 junctions of cylinder, conduit 8-1 and 5 junction of water/gas dual-purpose pump are sealed using corrosion-resistant, refractory seals glue, cover heating coil
3 heat-barrier material uses rare-earth thermal insulating coating, and the heat-barrier material 11 between 2 outer wall of 1 inner wall of ceramic cylinder and ceramic cylinder is using compound
Silicate.The outer surface whole with heating coil 3 of thermal insulation ceramics cylinder 2 is coated with outer housing 14, and 14 inside sidewalls of outer housing are provided with
Opening for connecting heating coil 3 and variable-frequency power sources conducting wire.
In addition, further include range sensor 6, range sensor 6 is ultrasonic distance sensor or infrared distance sensor,
Range sensor is mounted on 1 lower part of ceramic cylinder, is aligned close to one end of working face with ceramic cylinder 1, range sensor 6 and ceramic cylinder
1 is fixedly connected by tight loop.
Further include displacement control system, displacement control system includes pedestal 7, work top 7-1, support construction 7-3, guide rail
7-2, aspiration system, eddy heating for heating system after sending water system, range sensor to be fixedly connected, are placed on work top 7-1,
It is connected by two tight loops 10, two tight loops are respectively placed at 1 length direction 1/4 and 3/4 of ceramic cylinder, displacement control system
Effect be adjustment the distance between cleaning plant and working face, keep it in zone of reasonableness.
In conjunction with Fig. 3, coal-burning power plant's flue hydrogen sulfate ammonia cleaning provided by the invention based on eddy heating for heating and aspiration method fills
The course of work set is as follows：
In cleaning plant after working face for clearance, range sensor 6 measures working face and device distance S1, micro-
Processing receives 4 flow of water pump, and calculates the optimum distance S of equipment and working face in this flow2, microprocessor calculating
The difference DELTA S=S of two distances1-S2If Δ S is more than zero, distance of the cleaning plant apart from working face is more than optimum distance at this time,
Microprocessor to displacement control system send control instruction, displacement control system control work top 7-1 along guide rail 7-2 to by
The direction movement of nearly working face for clearance, displacement distance is Δ S, if Δ S is less than zero, at this time cleaning plant apart from working face away from
From less than optimum distance, microprocessor sends control instruction to displacement control system, and displacement control system controls work top 7-1
It is moved to the direction far from working face for clearance along guide rail 7-2, displacement distance is Δ S, the distance water warp that water pump 4 extracts at this time
Conduit 8,1 inner wall of ceramic cylinder send aquaporin just to spray to working face for clearance.
After displacement control system control cleaning plant is moved to optimum position, the hydrogen sulfate ammonia accumulated on working face for clearance
Crystal is dissolved in the water for sending water system to spray, and forms one layer of hydrogen sulfate ammonia spirit on surface for clearance, while variable-frequency power sources is to adding
Heat coil 3 is powered, and 3 surrounding of heating coil generates strong alternating magnetic field, which generates vortex in aqueous solution, in eddy current effect
Under effect, aqueous temperature increases rapidly, and the hydrogen sulfate ammonia crystal of aqueous solution lower layer starts to liquefy, and face surface forms sulfuric acid
The mixed solution of hydrogen ammonia spirit and liquid sulfuric acid hydrogen ammonia.Water/gas dual-purpose pump passes through conduit 8-1,2 inner cavity of thermal insulation ceramics cylinder simultaneously
Extract gas outward, mixing liquid surface on working face forms very strong negative pressure, under the action of negative pressure, mixing liquid along every
2 inner cavity of thermal Ceramics cylinder, conduit 8-1 are expelled to collection device.
The displacement control system of the present invention is a closed-loop control system, in cleaning plant after working face for clearance,
Microprocessor determines the close still principle working face of equipment according to actual distance value and calculated best shift value, into
And equipment is moved to by best clear position by displacement control system and is started to work, draw discharge hydrogen sulfate ammonia process
In, since hydrogen sulfate ammonia accumulates being gradually reduced for layer thickness, the distance between equipment and working face increase therewith, microprocessor
Device controls cleaning plant and is slowly moved to close to the direction of working face, makes relative displacement between cleaning plant and working face not
Become, ensures best cleaning effect.
Embodiment
In the present embodiment, coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant based on eddy heating for heating and aspiration method is mainly in
Frequency power, ceramic cylinder 1, thermal insulation ceramics cylinder 2, ultrasonic wave or infrared distance sensor, heating coil 3, displacement control system, water pump
4, water/gas dual-purpose pump 5 and microprocessor composition, as depicted in figs. 1 and 2.
Microprocessor uses microcontroller, and such as STM32F series, microprocessor fills for realizing Bit andits control function in cleaning
After resting against nearly working face, microprocessor is to judge cleaning plant according to the difference DELTA S of range sensor measured value and calculated value
It needs close to working face or far from working face, after cleaning plant is moved to best effort distance by displacement control system, cleaning
Device begins to warm up the hydrogen sulfate ammonia crystal drawn and accumulated on discharge working face.In the meantime, display equipment can show cleaning dress
Set the real-time range between working face.Distance measurement sensor primarily to measure between cleaning plant and working face away from
From the distance signal measured is sent to microprocessor after being improved by modulate circuit, and microprocessor carries out at data again
Reason, as long as the water for meeting the injection of water pump 4 just reaches working face, the model of distance measurement sensor is unlimited, required precision
Need not be too high, meet Centimeter Level.The effect of displacement control system is adjustment the distance between cleaning plant and working face,
Precision, which is Centimeter Level, can meet requirement.In the present embodiment, microprocessor uses STM32F103RBT6, Distance-sensing
Device uses ultrasonic distance sensor, selects the ultrasonic distance measuring module of model HC-SR04, measurements effective range for 2cm~
450cm, precision meet ranging requirement up to 2mm, and displacement platform uses the uniaxial high precision electro of model PT-GD140G-500
Dynamic displacement platform, stroke 50cm, mesa dimensions 16cm × 16cm, platform load-carrying 50kg meet requirement, display equipment choosing
With one piece 380 × 240 of 2.4 cun of liquid crystal displays；
Three steps of the course of work point realize that the first step is to form the conducting objects of eddy heating for heating：Pass through water pump 4, conduit 8 and pottery
It is water-soluble to form conductive ammonium hydrogen sulfate for the hydrogen sulfate ammonia plane of crystal injection water that 1 tube wall internal channel of porcelain cylinder is accumulated on working face
Liquid, the aqueous solution are the conducting objects of eddy heating for heating；Second step is to generate eddy current effect, and variable-frequency power sources is by conducting wire to winding
High-frequency ac current, the high-frequency alternating in heating coil 3 are conveyed in heating coil 3 of the heat insulating ceramic pipe 2 close to working face one end
Electric current generates alternating magnetic field around, is located at the fluid conductors in magnetic field because eddy current effect generates heat, is increased in temperature
After 145 DEG C, hydrogen sulfate ammonia crystal starts to liquefy, and further reduced the resistivity of fluid conductors, increases the electric conductivity of solution,
Eddy current effect is further enhanced；Third step be aspiration method discharge hydrogen sulfate ammonia crystal, water/gas dual-purpose pump by conduit 8-1,
Thermal insulation ceramics cylinder 2 extracts gas to the direction far from working face, therefore very big negative pressure is formed on working face, in suction function
Under, hydrogen sulfate ammonia solution is flowed along 2 inner cavity of thermal insulation ceramics cylinder, conduit 8-1 to the direction far from working face, is ultimately drained into molten
Liquor collecting device；
Ceramic cylinder 1 is the layer structure of cleaning plant, is fixed on the working face of displacement control device by clamp device,
Therefore the material for needing high rigidity, wearability good, in this implementation of class, using silicon chloride engineering ceramics, hardness be more than HRA80 with
On, wear-resisting property is 200 times or more of common steel, meets requirement.Thermal insulation ceramics cylinder 2 is mainly used for winding heating coil
2 and solution passing away is provided, is attached in thermal insulation ceramics cylinder 2 after hydrogen sulfate ammonia solution is cooling in discharge process in order to prevent
Wall results in blockage, and influences cleaning effect, therefore thermal insulation ceramics cylinder needs to be made of the good material of thermal and insulating performance, this implementation of class
In, using zirconia ceramics, thermal conductivity is 1.6-2.03W/ (m.k), meets requirement.2 outer wall of thermal insulation ceramics cylinder and ceramics
Heat-barrier material between 1 inner wall of cylinder mainly plays heat-insulating heat-preserving material, it is contemplated that actual demand, material is using neutral corundum point
Spar matter (AL2O3, MgO), it is filled with dry type ramming material, in the present embodiment, specially with plate diamond spar (grain size：0-2mm),
Sintering spinel particle is aggregate, electric smelting spinelle fine powder (≤0.044mm), white fused alumina fine powder (≤0.044mm), α-Al2O3It is micro-
Powder (≤5 μm), pure calcium aluminate cement is matrix, by aggregate and the mass ratio of matrix 70:30 dispensings；
Variable-frequency power sources and the model of electronic power switch, nameplate are unlimited, are selected according to user's actual need, heater wire cast
Formula is unlimited, is selected according to user's actual need, and variable-frequency power sources and heating coil can be bought on the market.In the present embodiment,
Variable-frequency power sources selects the variable-frequency power sources that frequency is 2000W for 5kHz and power, heating coil to use copper wire coiling, and switch is using normal
The electronic power switch IGBT of rule；
The effect of water pump 4 is to form vortex conductor to working face injection water, it is contemplated that actual demand, to avoid cleaning plant
Farther out apart from working face distance, it is not high to extract expulsion efficiency, therefore pump power need not be too big, weight is unsuitable overweight.At this
In embodiment, selects and create star AT305S miniature immersible pumps, operating voltage 220V, power 25V, flow 1200L/H, lift 1.4m,
Meet requirement.The effect of water/gas dual-purpose pump 5 is to extract discharge hydrogen sulfate ammonia solution, it is contemplated that the strong of hydrogen sulfate ammonia is sticked
Type, needs the water/gas dual-purpose pump that power is larger, in the present embodiment, selects the high Shanxi QBY3-25 pneumatic diaphragm pumps in Shanghai, work electricity
220V, flow 57L/min, lift 70m are pressed, journey 2.3-3m is washed and meets requirement；
The use process of this example cleaning plant, when cleaning plant is close to working face for clearance, distance measurement sensor
It will measure and upload cleaning plant at a distance from working face for clearance, microprocessor STM32F103RBT6 is received and stored actual measurement
On distance value and real-time display to display equipment liquid crystal display, flow value is uploaded to microprocessor by water pump 4, and microprocessor can pass through
Be calculated the best cleaning distance value under the flow, following microprocessor ultrasonic distance sensor can be measured away from
It is compared from value value and calculating optimum value, a range deviation Δ S can be obtained at this time, then microprocessor will be according to distance
Deviation delta S determines that far from being also proximate to working face, then command displacement platform is moved to optimum distance.Bit andits control is completed
Afterwards, water pump 4 is formed by the hydrogen sulfate ammonia crystal injection water for sending aquaporin to be accumulated on working face inside conduit 8, ceramic cylinder 1
Conductive hydrogen sulfate ammonia spirit, high frequency electric source convey electric current to heating coil 3, and the alternating magnetic field generated on heating coil 3 exists
Vortex is formed in hydrogen sulfate ammonia solution, under eddy current effect effect, hydrogen sulfate ammonia spirit temperature increases, when temperature is higher than 145
After DEG C, hydrogen sulfate ammonia solution starts to liquefy, and water/gas dual-purpose pump 5 extracts gas outward by conduit 8-1,2 inner cavity of thermal insulation ceramics cylinder
Body forms very strong negative pressure on hydrogen sulfate ammonia solution surface, and under the action of negative pressure, hydrogen sulfate ammonia solution is expelled to collection dress along conduit
It sets.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation mode of the present invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs, is not taking off
Under the premise of from present inventive concept, several simple deduction or replace can also be made, all shall be regarded as belonging to the present invention by institute
Claims of submission determine scope of patent protection.
Claims (10)
1. coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant based on eddy heating for heating Yu aspiration method, which is characterized in that the cleaning fills
It sets including ceramic cylinder (1), range sensor (6), water pump (4), water/gas dual-purpose pump (5) and displacement control system；Wherein, ceramic
There are one aquaporin is sent in cylinder (1) tube wall, thermal insulation ceramics cylinder (2), thermal insulation ceramics cylinder (2) are installed with inside ceramic cylinder (1)
It is being arranged with induction coil for heating (3), ceramic cylinder (1) inner wall and thermal insulation ceramics cylinder close to one end of working face (13)
(2) it is equipped with gap between outer wall, heat-barrier material (11) is filled in gap；It is close that range sensor (6) is installed on ceramic cylinder (1)
One end of working face (13)；Water pump (4) one end send aquaporin to connect by conduit (8) in ceramic cylinder (1) tube wall, the other end
It is connect with water source, water pump (4) is used for working face (13) injection water；Water/gas dual-purpose pump (5) one end by conduit (8-1) with every
Thermal Ceramics cylinder (2) connects, and the other end is placed in retracting device, and water/gas dual-purpose pump (5) is for extracting on discharge working face (13)
Solution；Displacement control system includes pedestal (7) and the support construction (7-3) being successively set on from bottom to top on pedestal (7), leads
Rail (7-2) and work top (7-1), are used to adjust the distance between cleaning plant and working face (13).
2. coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant according to claim 1 based on eddy heating for heating Yu aspiration method,
It is characterized in that, further including the variable-frequency power sources for powering to induction coil (3), the diameter of induction coil (3) is less than heat-insulated pottery
Gap between porcelain cylinder (2) outer wall and ceramic cylinder (1), induction coil (3) are covered with heat-barrier material and waterproof coating outside, this is heat-insulated
Material uses rare-earth thermal insulating coating.
3. coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant according to claim 2 based on eddy heating for heating Yu aspiration method,
It is characterized in that, thermal insulation ceramics cylinder (2) and the outer surface of induction coil (3) entirety are coated with outer housing (14), outer housing (14)
Inside sidewalls offer the opening for connecting induction coil (3) and variable-frequency power sources conducting wire.
4. coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant according to claim 1 based on eddy heating for heating Yu aspiration method,
It is characterized in that, further including the microprocessor for controlling water pump (4) work.
5. coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant according to claim 4 based on eddy heating for heating Yu aspiration method,
It is characterized in that, range sensor (6) is ultrasonic distance sensor or infrared distance sensor, range sensor (6) installation
In ceramic cylinder (1) lower part, it is aligned close to one end of working face (13) with ceramic cylinder (1), range sensor (6) and ceramic cylinder (1)
It is fixedly connected, and range sensor (6) is also connect with microprocessor.
6. coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant according to claim 5 based on eddy heating for heating Yu aspiration method,
It is characterized in that, ceramic cylinder (1) is fixedly connected with thermal insulation ceramics cylinder (2) both ends by connection structure (9), and bindiny mechanism (9)
It is made of heat proof material.
7. coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant according to claim 1 based on eddy heating for heating Yu aspiration method,
It is characterized in that, ceramic cylinder (1) is placed on work top (7-1), connected by two tight loops (10), two tight loops (10)
It is respectively placed at ceramic cylinder (1) length direction 1/4 and 3/4.
8. coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant according to claim 1 based on eddy heating for heating Yu aspiration method,
It is characterized in that, conduit (8) is sealed with water pump (4) junction using waterproof gasket cement with ceramic cylinder (1) junction, conduit (8),
Conduit (8-1) uses corrosion-resistant, refractory seals with ceramic cylinder (2) junction, conduit (8-1) and water/gas dual-purpose pump junction
Glue seals, and conduit (8-1) has been externally wrapped with heat-barrier material.
9. coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant according to claim 1 based on eddy heating for heating Yu aspiration method,
It is characterized in that, the heat-barrier material between ceramic cylinder (1) inner wall and thermal insulation ceramics cylinder (2) outer wall uses composition silicate.
10. coal-burning power plant's flue hydrogen sulfate ammonia cleaning plant according to claim 1 based on eddy heating for heating Yu aspiration method,
It is characterized in that, the course of work is：Soaking gas equipment is vortexed close to working face (13), range sensor measuring system and Bit andits control
Systematic survey simultaneously adjusts cleaning plant at a distance from working face (13), and the water that water pump (4) sprays is made just to reach working face (13)；
The ammonium sulfate deposited on working face (13) forms ammonium bisulfate solution (12) with ammonium hydrogen sulfate, becomes conductor, induction coil
(3) strong alternating magnetic field is generated in, which forms vortex, ammonium bisulfate solution (12) in ammonium bisulfate solution (12)
Temperature rise, due to Kelvin effect, the solution temperature on working face (13) close to ceramic cylinder (1) rises, and accelerates ammonium hydrogen sulfate
Dissolving；
After working face (13) forms liquid, water/gas dual-purpose pump (5) forms negative pressure on working face (13), and it is molten to extract ammonium hydrogen sulfate
Liquid (12) is simultaneously emitted by conduit in retracting device.
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| CN107642793A (en) * | 2017-08-01 | 2018-01-30 | 中国大唐集团科学技术研究院有限公司华北分公司 | Prevent ammonium hydrogen sulfate from blocking the system and method for air preheater after SCR denitration transformation |
| CN107864528A (en) * | 2017-10-26 | 2018-03-30 | 西安交通大学 | A kind of black matrix face type temperature source and application method based on eddy heating for heating |
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| DE19723716A1 (en) * | 1997-05-30 | 1998-12-03 | Ver Energiewerke Ag | Method of preventing ash from penetrating air system of regenerative air pre-heater |
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