CN207316956U - Suitable for the flue gas treating system in thermal power plant - Google Patents

Abstract

It the utility model is related to a kind of flue gas treating system suitable for thermal power plant, it includes flue, the flue is equipped with chimney heat exchanger and flue deashing device, the flue deashing device includes ash bucket and the horizontal auger being arranged on below ash bucket, the ash bucket is opened on the stack base before chimney heat exchanger, the gas inlet of the exhanst gas outlet connection spray column of the chimney heat exchanger, the water outlet access shower water neutralization pond of the spray column, the ash discharge access shower water neutralization pond of the auger, the water outlet access sedimentation basin of the shower water neutralization pond.The utility model is simple in structure, dependable performance, the area of passage of flue can be changed according to flue gas flow, solve the problems, such as to block up ash caused by dust deposition, dust stratification can be removed, and the dust stratification in flue and flue gas is rationally handled, pollutant emission is reduced, improves the security and economy of boiler operatiopn.

Description

Suitable for the flue gas treating system in thermal power plant

Technical field

A kind of flue gas treating system suitable for thermal power plant is the utility model is related to, belongs to boiler smoke treatment technology Field.

Background technology

At present in the operation of Industrial Boiler, actual exhaust gas temperature is higher than design exhaust gas temperature, with national energy-saving emission reduction political affairs Plan is implemented, and heat exchanger is installed additional in boiler back end ductwork in part power plant（Low-level (stack-gas) economizer or phase-change heat-exchanger etc.）To reduce cigarette Temperature, so as to improve efficiency of energy utilization, improve atmosphere quality, ensure supply of electric power safety.

Since back-end ductwork flying dust concentration is larger（40g/m3~80g/m3）And flue gas flow rate is low during underrun, cause Exchanger base dust deposit in flue problem is serious.The deashing of traditional heat exchanging device is mainly carried out by soot blower heat exchanging device surface The problem of purging, seldom consideration heat exchanger section dust deposit in flue.When dust stratification is serious, heat exchanger effective heat exchange area can be caused to subtract Less, flue gas actual internal area diminish, boiler positive pressuring combustion the problems such as so that cause boiler output deficiency, flue gas loss increase, heat Efficiency reduces, and influences safe operation of the boiler, economical operation.

Utility model content

In order to solve the above technical problems, the utility model provides a kind of flue gas treatment system suitable for thermal power plant System, can either effectively reduce dust deposit, prevent flue blockage, and can effectively remove the product in chimney heat exchanger preceding pipeline Ash, and the dust in flue and in flue gas is subjected to proper treatment, reduce exhaust emission.

The technical solution of the utility model is：

A kind of flue gas treating system suitable for thermal power plant, it includes flue, and the flue is equipped with flue heat exchange Device and flue deashing device, the flue deashing device include ash bucket and the horizontal auger being arranged on below ash bucket, the ash bucket The stack base being opened on before chimney heat exchanger, the gas inlet of the exhanst gas outlet connection spray column of the chimney heat exchanger, The water outlet access shower water neutralization pond of the spray column, the ash discharge of the auger access the shower water neutralization pond, the spray The water outlet access sedimentation basin of water neutralization pond.

The flue gas of the chimney heat exchanger discharge removes the dust contained in flue gas, after dedusting by the spray column Shower water enter the shower water neutralization pond and carry out acid-base neutralization, the dust collected in the flue deashing device is also discharged into institute State shower water neutralization pond and carry out acid-base neutralization, the neutral water after neutralization is discharged into the sedimentation basin, completes precipitation separation and discharge.

Preferably, the cross section of the ash bucket and vertical sectional shape are up big and down small inverted trapezoidal structure, the ladder Two base angle angles are preferably 90-130 ° below shape structure.

Preferably, the ash hole on the grey bottom sheet is one or more strip holes extended laterally or some transverse directions point The through hole of cloth, such as rectangular through-hole, the breadth-first of the strip hole are not more than the 1/3 of ash bucket baseplate width, and the rectangle leads to The breadth-first in hole is not less than the 2/3 of ash bucket baseplate width, by the setting of these through holes, can better ensure that sending for auger Grey effect, avoids the ash in auger from moving up and down and weaken the promotion effect of auger flight, and the ash hole connects the strand The ash inlet at imperial top, the ash discharging hole of the auger are arranged on the bottom of auger afterbody, and the ash discharging hole can access（Refer to ash discharge Any connection mode or relative position relation that can enter）The pneumatic ash conveying pipe or V-belt conveying device being disposed below, And the shower water neutralization pond is connected, ash discharge can be directly thrown into neutralization pond, can also be put into neutralization pond intake chamber, Slowly it is flushed to water inlet in neutralization pond, side trimming neutralizes.

Preferably, the head of the auger is connected with the auger motor for driving auger helical axis, the auger motor Outside the conveying housing of the auger.

Preferably, one or more level-sensing devices are equipped with the ash bucket, when the material position is calculated as multiple, between transversely waiting Every distribution, piling height grey in ash bucket can be obtained by level-sensing device, after certain height is reached, passes through control device control Auger work processed, if still having certain dust stratification height after a certain period of time in auger work, prompts auger conveying failure Or there are the problems such as dust stratification bonding, it can use and start rapping apparatus or using other Inspection and maintenance measures.

Preferably, it is preferable that the ash bucket is equipped with ash bucket rapping apparatus, and the ash bucket rapping apparatus is by carrying out ash bucket Rapping, the ash that can promote to accumulate or be bonded in ash bucket fall into auger.

Preferably, it is equipped with the flue and is used to the bottom of bottom surface dust stratification push-in ash bucket top inlet scraping hawk, it is described Bottom scrapes hawk and scrapes ash driving motor equipped with the bottom being drivingly connected with it, so as to which the ash being deposited on flue bottom surface is scraped ash charge Bucket.

Preferably, the top in the spray column is equipped with one or more layers water mist sprinkling pipe, and lower part is inputted equipped with flue gas Mouthful, bottom is equipped with spray column water outlet, and the water mist sprinkling pipe is equipped with nozzle, and the spray water inlet of the water mist sprinkling pipe connects Shower water input channel is connect, the top of the spray tube is equipped with demister, is stayed between the demister and the spray tube There is spacing, the demister is made of one or more layers baffle plate, the highly preferred 200mm of every layer of baffle plate, described The top gas outlet of spray column is equipped with tail gas air-introduced machine, and the mouth of a river connects the shower water neutralization pond at the spray column, described The temperature sensor of detection output water temperature can be equipped with spray column water outlet.

Can be equipped with cooling water pipe in the housing of the spray column, the cooling water pipe can use helix tube or other Anticipate suitable form, the cooling water pipe is located at the middle part of the spray column, and the cooling water pipe is equipped with connection cooling water input The cooling water inlet of pipeline and the cooling water intake in connection coolant outlet hose road, the cooling water outlet are preferably placed at institute The top of cold water intaking water inlet is stated, i.e., using the cooling water organizational form of bottom in and top out, the cooling water intake and/or cooling Water water outlet can be equipped with the temperature sensor for being used for detecting water temperature.

The cooling water pipe can be one or more of in common light pipe, finned tube, screwed pipe.

Preferably, the anti-blocking apparatus for ash of flue is additionally provided with the flue, the anti-blocking apparatus for ash of flue includes setting The shaft is fixed or are rotatablely connected to shaft and multiple sideboards on flue cavity top, the sideboard：

When by the way of being fixedly connected, the sideboard passes through shaft described in welding or pin connection, the shaft It is drivingly connected with 90 ° of rotating electric rotating machines of both forward and reverse directions, the electric rotating machine drives the sideboard to rotate and stop at 0-90 ° of any angular position, adjusts the size of flue cross section, controls the flow velocity of flue gas；

When by the way of rotation connection, the sideboard is drivingly connected by Multi-section positioner and electric rotating machine, The electric rotating machine adjusts one or more sideboards by the Multi-section positioner and is turned on and off, and adjusts flue and cuts The size in face, controls the flow velocity of flue gas.

Preferably, the positioning hop count of the Multi-section positioner is no less than the quantity of the sideboard, each active catch Plate is respectively equipped with respective shaft, and the sideboard is by way of the Multi-section positioner is drivingly connected with electric rotating machine The input terminal of the shaft of each sideboard is equipped with the location structure supporting with the Multi-section positioner, the electric rotating machine Output shaft connects the input terminal of the Multi-section positioner by shaft coupling or retarder, the positioning end of the Multi-section positioner with it is each Location structure in shaft is engaged.

Preferably, the sideboard is rotatably connected by connecting mechanism for rotating with its shaft, and the sideboard with Adjustable rotary positioning pin is equipped between its shaft, the adjustable rotary positioning pin is installed on sideboard, corresponding institute Stating circumferentially distributed in shaft has multiple location holes.

The beneficial effects of the utility model are：

Dust in flue and in flue gas can be carried out proper treatment by the utility model, reduce exhaust emission；In former cigarette In the case that road construction is basically unchanged, the flying dust being deposited on before heat exchanger is cleared out by deashing device, avoids dust accumulation Block flue；Since deashing device is arranged on before heat exchanger, flue gas reduced velocity flow above ash bucket, and exchange heat entering Need to change direction during device, therefore increase the flue dust settling amount above ash bucket, advantageously reduce into heat exchanger And subsequent processing device fume amount, and, dependable performance simple in structure by the deashing device that ash bucket and auger are formed, safeguard letter Just；In the setting of the top of flue and the mirror-symmetrical chamber of ash bucket flue gas can also can be made relatively more steady in flow process, And the sectional area of flue at ash bucket is increased, flue gas flow rate is reduced and is deposited in ash bucket, enter afterbody heat exchanger to reduce Flying dust, and then reduce heat exchanging device abrasion or dust stratification block；The section of ash bucket uses up big and down small trapezoidal, angle of inclination Not less than 50 ° of the angle of repose of dust, it is ensured that dust is slipped to hopper bottom, is not stopped on side wall；By in flue Hawk is scraped in setting, can remove the dust stratification of flue other positions, is blown hawk and is used the inclined trapezoidal plate of downward wind direction, forms one The effect of kind spout, increases the flowing velocity of flue gas, reduces deposition of the dust in flue elsewhere；Due to set spray column into Row flue gas ash removal, good dedusting effect, and being combined with desulfurization, have certain acid shower water in shower water neutralization pond with Neutralization reaction occurs for other alkali solid wastes of the on-site collections such as cigarette ash, advantageously reduces the processing cost of acid water, processing Shower water afterwards can be back to spray column after certain purified treatment and be recycled as shower water.

Brief description of the drawings

Fig. 1 is the utility model embodiment system block diagram；

Fig. 2 is the utility model flue deashing device and the anti-blocking apparatus for ash embodiment schematic diagram of flue；

Fig. 3 is the utility model flue deashing device and the anti-blocking apparatus for ash another embodiment schematic diagram of flue；

Fig. 4 is side schematic view shown in Fig. 3；

Fig. 5 is the schematic diagram of the anti-blocking apparatus for ash embodiment of the utility model flue；

Fig. 6 is the schematic diagram of the anti-blocking apparatus for ash another embodiment of the utility model flue；

Fig. 7 is the schematic diagram of rotary positioning apparatus in embodiment illustrated in fig. 5；

Fig. 8 is sideboard blend stop position view in embodiment illustrated in fig. 5.

Embodiment

The utility model is described further below in conjunction with the accompanying drawings.

As Figure 1-Figure 8, a kind of flue gas treating system suitable for thermal power plant, including cigarette be the utility model is related to Road 1, the flue 1 are equipped with chimney heat exchanger 20 and flue deashing device, and the flue deashing device includes ash bucket 33 and sets The horizontal auger 34 below ash bucket is put, the ash bucket 33 is opened on the stack base before chimney heat exchanger, and the flue changes The gas inlet of the exhanst gas outlet connection spray column 30 of hot device 20, the water outlet access shower water neutralization pond 40 of the spray column 30, The ash discharge access shower water neutralization pond 40 of the auger 34, the water outlet access sedimentation basin 50 of the shower water neutralization pond.

Preferably, the flue deashing device, including ash bucket 33 and the auger 34 being arranged on below the ash bucket, the ash Bucket 33 is arranged on the bottom of heat exchanger windward side flue entrance 51 and is arranged vertically with flue 1, is found in practice, since flow velocity subtracts The effect of the factors such as slow and dust dead weight, the position at flue entrance 51 can produce a large amount of dust stratifications, set ash bucket 33 can Dust is collected and by setting auger 34 to discharge dust stratification.

When the auger 34 starts, due to produced by the own wt and dust of dust and the side wall of the ash bucket 33 Frictional force, dust is not rotated with together with the helical blade of the auger 34, can only be in the helical blade of the auger 34 Push is lower to be moved forward.

Preferably, the cross section of the ash bucket 33 and vertical sectional shape are up big and down small inverted trapezoidal structure, easy to ash Dirt gathers collection, and two base angle angles are 90-130 ° below the inverted trapezoidal structure, the ash bucket 33 under this angle Two side walls inclination angle all be not less than 50 °, more than the angle of repose of dust, dust falls can slide automatically on side wall.

Preferably, level-sensing device 31 is equipped with the ash bucket 33, the level-sensing device 31 is arranged on any one of the ash bucket 33 The position at end, preferably adjacent to described spiral one end for stirring 4 imperial afterbodys, the auger 34 is passed through by the way of intermittent work The level-sensing device 31 can observe the amount of dust collected in the ash bucket 33, and when amount of dust is larger, it is clear to start the auger 34 Except dust stratification, remove and close the auger 34 after completing.

Preferably, the head of the auger 34 is connected with auger motor 35, for driving the rotation of the auger, by auger Motor is placed in the outside of conveying housing, is conducive to electric motor protecting.

Preferably, the ash bucket 33 is equipped with ash discharging hole 32 in afterbody one end of the auger 34, in the spiral shell of the auger 34 Under the promotion of vane piece, dust is admitted to the ash discharging hole 32 and exports, and the ash discharging hole 32 is located at the bottom of the auger afterbody Face simultaneously connects grey storehouse by pneumatic ash conveying pipe, and the pneumatic ash conveying pipe is equipped with pneumatic ash conveying plant, there is provided power is by dust Grey storehouse is sent into, V-belt conveying device etc. can also be used.

Preferably, the pneumatic ash conveying plant is pumped using storehouse.

Preferably, ash bucket rapping apparatus can be provided with the ash bucket, the ash bucket rapping apparatus can include setting Shaft 44 and multiple cams 45 for being arranged in shaft outside flue and along the extension of flue direction, with the rotation of shaft 44, The cam 45 can tap walling of flue, vibrate flue and slide dust.

Alternatively, the ash bucket rapping apparatus can use can arbitrarily producing for the prior art to vibrate and dust is dropped Mode, for example with electric and magnetic oscillation, pneumatic or directly with manually along the mode of ash bucket percussion.

Preferably, it is equipped with the flue 1 and scrapes hawk 42, the hawk 42 of scraping is trapezoidal tabular, longer base and cigarette Road inner wall is in contact and wind direction tilts downwards.

Preferably, the quantity for scraping hawk 42 is one or four, should when the quantity for scraping hawk 42 is one Scrape hawk and be properly termed as bottom surface and scrape hawk, the longer base for scraping hawk 42 and inner wall on the downside of flue（That is flue bottom surface）Phase Contact；When the quantity for scraping hawk 42 is four, each longer base for scraping hawk 42 four with flue respectively Inner wall is in contact, each described to scrape hawk 42 and cooperate and weld to form pyramidal structure.

The hawk 42 of scraping is located at 52 position of flue outlet under normal conditions, can not only play and scrape grey effect, Er Qieyou Above-mentioned special grey plate shape is scraped in employing so that the flue cross section in exit is gradually reduced the structure to form similar spout, Accelerate the flowing of flue gas, reduce the deposition produced in follow-up heat exchanger, the hawk 42 of scraping can be slided along flue 1 and by cigarette Dust stratification on road inner wall is scraped in the ash bucket 33 at flue entrance.

Preferably, be equipped with the leading screw 41 extended along flue direction in the flue 1, it is described scrape hawk 42 be equipped with it is described 41 matched nut of leading screw or threaded hole, one end connection clockwise and anticlockwise motor of the leading screw 41, pass through the rotation of the motor The leading screw is driven to rotate, the hawk 42 of scraping is moved linearly simultaneously by the effect of the nut or threaded hole along the leading screw 41 Ash is scraped, when motor reversely rotates, the leading screw 41 reversely rotates, and the hawk 42 of scraping moves backward and returns to flue outlet Place.

The set-up mode of the leading screw 41 is symmetrical arranged two preferably adjacent to stack base inner wall, to the bottom for scraping hawk Portion both ends exert a force at the same time, make the back-and-forth motion scraped the steady nothing of hawk 42 and rocked；, can be in cigarette when scraping hawk using four The inner wall of the upper and lower part in road sets two leading screws 41 respectively, can also be respectively provided with two leading screws in four inner walls of flue 41。

Preferably, 1 top of flue is equipped with chamber 43 mirror-symmetrical with ash bucket with 33 opposite position of ash bucket, makes cigarette The flowing of gas is more steady, will not deflect to some direction, and increases the sectional area of flue 1 at ash bucket, reduces flue gas Flow velocity makes more dust deposits in the ash bucket 33.

When each power section/driving device uses electric electric-controlled device, power control cabinet can be set to control each power part Point and/or driving device work, and can be by pre-set programs and/or the signal gathered according to related sensor, according to existing There is technology to realize these controls.

Preferably, the top in the spray column is equipped with one or more layers water mist sprinkling pipe, and lower part is inputted equipped with flue gas Mouthful, bottom is equipped with spray column water outlet, and the water mist sprinkling pipe is equipped with nozzle, and the spray water inlet of the water mist sprinkling pipe connects Shower water input channel is connect, the top of the spray tube is equipped with demister, is stayed between the demister and the spray tube There is spacing, the demister is made of one or more layers baffle plate, the highly preferred 200mm of every layer of baffle plate, described The top gas outlet of spray column is equipped with tail gas air-introduced machine, and the mouth of a river connects the shower water neutralization pond at the spray column, described The temperature sensor of detection output water temperature can be equipped with spray column water outlet.

Can be equipped with cooling water pipe in the housing of the spray column 30, the cooling water pipe can use helix tube or other The form of any suitable, the cooling water pipe are located at the middle part of the spray column, and it is defeated that the cooling water pipe is equipped with connection cooling water Enter the cooling water inlet of pipeline and the cooling water intake in connection coolant outlet hose road, the cooling water outlet is preferably placed at The top of the cold water intaking water inlet, i.e., using the cooling water organizational form of bottom in and top out, the cooling water intake and/or cold But water water outlet can be equipped with the temperature sensor for being used for detecting water temperature.

The cooling water pipe can be one or more of in common light pipe, finned tube, screwed pipe.

It is a kind of embodiment of the anti-blocking apparatus for ash of flue described in the utility model shown in Fig. 5, including flue 1, the cigarette Multiple sideboards 2 are equipped with road, the sideboard is located at the top of the flue and by Multi-section positioner 21 and rotation Motor 5 is drivingly connected, and when Multi-section positioner is in different positioning states, is located by connecting being realized from different sideboards, And then realize electric rotating machine and this/these are positioned drive connection between the sideboard of connection, more from there through changing The positioning states of section locator so that electric rotating machine can drive different sideboards/sideboard combination rotation, realize to cigarette The different occlusion effects in road, change the area of passage of flue.

The positioning hop count of the Multi-section positioner is preferably no less than the quantity of the sideboard, so as to realize more Flue area of passage.

Each sideboard can be respectively equipped with respective shaft, the sideboard by the Multi-section positioner with The mode that electric rotating machine is drivingly connected can be that the input terminal of the shaft of each sideboard is equipped with and the Multi-section positioner Supporting location structure, the output shaft of the electric rotating machine connect the input of the Multi-section positioner by shaft coupling or retarder End, the positioning end of the Multi-section positioner is engaged with the location structure in each shaft, from there through being located by connecting for countershaft Realization is located by connecting sideboard.

The Multi-section positioner can use the prior art of any suitable, as long as can be real by varying its positioning states Existing different positioning connections that its is combined with sideboard or sideboard, location structure in the shaft can be according to Set according to the specific requirement of used Multi-section positioner, so as to be engaged with the positioning end of Multi-section positioner, work as multistage When locator is in different positioning states, its positioning end combined with different shafts or different shafts between by positioning knot accordingly Structure is located by connecting（Position, which is fixed, not to be allowed to rotate against between the two in other words）, when electric rotating machine rotates, determined by multistage Position device drives the shaft fixed with its position or shaft to combine and together rotate.

For example, a kind of simple embodiment is：The shaft of each sideboard uses coaxial sleeve form, the end of each shaft Set on face and be inserted into the notch or pin hole of positioning pin, the Multi-section positioner be equipped with an outlet side connect electric rotating machine and The coaxial transmission shaft with each shaft, is additionally provided with a disk for being installed on transmission shaft outlet side, being set on the disk can The one or more positioning pins coordinated from the notch in different shafts or pin hole, by positioning pin be inserted into notch in respective axes of rotation or In pin hole, being located by connecting between the transmission shaft of Multi-section positioner and the shaft of sideboard is achieved that（Cannot opposite rotation Turn）, when thus electric rotating machine rotates, it becomes possible to drive respective axes of rotation and then drive respective activity baffle to rotate together with.It is described fixed Position pin can use the form of any suitable, for example, a kind of simple mode is that through hole or tapped through hole, people are equipped with disk Work by positioning pin from the through hole or threaded hole through insertion respective axes of rotation on notch or pin hole, can also use similar principles with Motor machine mode realizes this insertion.

As needed, the shaft of each sideboard can not also be coaxial, is respectively equipped with respective transmission mechanism, each shaft The input terminal of transmission mechanism connects the output gear of electric rotating machine by the gear type multistage clutch as Multi-section positioner, when When gear type multistage clutch is in different conditions, different shafts or shaft can be driven to combine and rotate.

The sideboard can be rotatably connected by connecting mechanism for rotating 22 with its shaft, and the sideboard and its Adjustable rotary positioning pin 22 is equipped between shaft.The connecting mechanism for rotating can use the prior art of any suitable, example As bearing or axle sleeve, or the connection structure that optical axis coordinates with unthreaded hole, the adjustable rotary positioning pin may be mounted at activity It is circumferentially distributed in the corresponding shaft to have multiple location holes on baffle, when determining for change adjustable rotary positioning pin insertion During the hole of position, just change circumferentially fixed position of the sideboard relative to its shaft, be achieved in sideboard and its shaft it Between setting angle adjusting.And then realize the angular adjustment between sideboard and electric rotating machine, change electric rotating machine one and position Put angle of inclination of the lower sideboard in flue.

It is the another embodiment of the anti-blocking apparatus for ash of flue described in the utility model shown in Fig. 6-Fig. 8, including flue, sets The main shaft in flue and the one or more sideboards 2 being arranged in flue are put, the main shaft 10 is located in the flue Top, ensure that flue is unimpeded, the sideboard is rotatably connected on the main shaft, the sideboard and the main shaft it Between be equipped with rotary positioning apparatus 4.

The sideboard and the main shaft are connected by disengaging type connecting mechanism for rotating 3, and the main shaft is equipped with limitation The baffle ring or block of the disengaging type connecting mechanism for rotating axial movement, when disengaging type connecting mechanism for rotating is opened, disengaging type Connecting mechanism for rotating relatively rotates, when disengaging type connecting mechanism for rotating is closed, disengaging type connecting mechanism for rotating and principal shaft locking And revolve round the sun with main shaft.The disengaging type connecting mechanism for rotating can use the prior art of any suitable, such as：Rubber voussoir knot Structure, torsional spring structure, magnet moment of torsion torsion structure and hydraulic rotary rotation structure etc..

The sideboard is rectangle, when the sideboard quantity for it is multiple when, the sideboard with it is described Flue gas flow direction is vertical and transversely arranged successively in flue, and certain spacing is equipped between the adjacent sideboard.

The rotary positioning apparatus 4 includes sideboard positioning pin 12 and sideboard location hole 11, the sideboard Positioning pin is arranged on the upper end of the sideboard and is set with the sideboard elastic connection, the sideboard location hole On the main shaft, the location hole a, location hole b and location hole c are identical with the sideboard positioning pin quantity, each described The circumferentially spaced 90 ° of distributions of location hole.

The sideboard location hole is slidably matched with sideboard positioning pin, and the spring 13 is determined with the sideboard The tail end of position pin is connected, and the location hole that sideboard positioning pin is pushed to main shaft by spring causes rotary positioning apparatus and main shaft phase Positioning.

This anti-blocking apparatus for ash further includes two stents 6 or 7, and the stent is separately mounted to the both sides at the top of flue, Between described two stents, the both ends of the main shaft are connected the sideboard with the holder pivots of corresponding side respectively.

The main shaft positioning device 9 includes main shaft orientation pin 9 and main shaft orientation hole, and the main shaft orientation hole is arranged on described On main shaft, the main shaft orientation pin is arranged on the upper end or outside of a stent, the main shaft orientation hole and the main shaft Positioning pin is slidably matched, and the quantity in the main shaft orientation hole is three and circumferentially spaced 90 ° of settings.

The three-stage positioner is equipped with positioning pin controller, the positioning pin controller and the fixed locating stud One end is connected, the adjustable location pin controller；The prior art of any suitable can be used, such as：Spring reset, electricity Magnet valve, hydraulic valve and cylinder etc..

As shown in figure 8, being additionally provided with sideboard blend stop 12 in the flue, the sideboard blend stop is located at the activity Windward side when baffle is perpendicular to flue is simultaneously parallel with the main shaft, and the both ends of the sideboard blend stop are fixed on the cigarette The both sides in road, the sideboard blend stop ensure that sideboard can be perpendicular to flue to limit the transition of sideboard rotation Normally keep out the wind.

This anti-blocking apparatus for ash further includes electric rotating machine 5, and the electric rotating machine is installed on one end of the main shaft, the rotation Rotating motor is fixed on the lateral surface of the stent, and one or more pressure for being used to detect flue gas pressures are equipped with the flue and are passed Sensor is used for detecting the through-flow flow velocity of flue gas.

The specific working mode of the anti-blocking apparatus for ash of flue described in the utility model can be：

1st, low-load is worked as（Boiler load is less than 50%）When flue flow velocity to be most slow, at this moment three-stage positioner is transferred to most Big gear, electric rotating machine rotation three pieces sideboard are all set to open state, so that flow area is minimum, and wind speed is protected Demonstrate,prove the particulate matter in taking away flue dust in the case of the not dust stratification.

2nd, when medium（When boiler load is between 50%-75%）Flue flow velocity is medium during load, and at this moment three-stage positions Device is transferred to intervening gears, and motor rotation three pieces sideboard is two panels or a piece of open mode, so that flow area root Change according to load and change, and wind speed ensures to take away the particulate matter in flue dust in the case of not dust stratification.

3rd, high load is worked as（Boiler load is higher than 75%）When flue flow velocity to be most fast, at this moment three-stage positioner is transferred to most Small gear, motor rotation three pieces sideboard are all set to off status, so that flow area is maximum, and wind speed ensures The particulate matter in flue dust is not taken away in the case of dust stratification.

Disclosed in the utility model it is each preferably with optional technological means, unless otherwise indicated and a preferred or optional skill Art means are outer for the further restriction of another technological means, can form some different technical solutions in any combination.

Claims (10)

1. a kind of flue gas treating system suitable for thermal power plant, it is characterised in that including flue, the flue is equipped with cigarette Road heat exchanger and flue deashing device, the flue deashing device include ash bucket and the horizontal auger being arranged on below ash bucket, institute State the stack base that ash bucket is opened on before chimney heat exchanger, the flue gas of the exhanst gas outlet connection spray column of the chimney heat exchanger Import, the water outlet access shower water neutralization pond of the spray column, the ash discharge of the auger accesses the shower water neutralization pond, described The water outlet access sedimentation basin of shower water neutralization pond.

2. the flue gas treating system according to claim 1 suitable for thermal power plant, it is characterised in that the ash bucket Cross section and vertical sectional shape are up big and down small inverted trapezoidal structure, and two base angle angles are excellent below the inverted trapezoidal structure Elect 90-130 ° as.

3. the flue gas treating system according to claim 2 suitable for thermal power plant, it is characterised in that the ash bucket bottom Ash hole on plate is one or more strip holes extended laterally or the through hole of some cross direction profiles, and the ash hole connects institute The ash inlet at the top of auger is stated, the ash discharging hole of the auger is arranged on the bottom of auger afterbody, and the ash discharging hole connects the spray Water drenching neutralization pond.

4. the flue gas treating system according to claim 3 suitable for thermal power plant, it is characterised in that the auger Head is connected with the auger motor for driving auger helical axis, and the auger motor is located at outside the conveying housing of the auger.

5. the flue gas treating system according to claim 4 suitable for thermal power plant, it is characterised in that in the ash bucket Equipped with one or more level-sensing devices, when the material position is calculated as multiple, transversely it is spacedly distributed.

6. the flue gas treating system according to claim 5 suitable for thermal power plant, it is characterised in that the ash bucket is set There is ash bucket rapping apparatus, be equipped with the flue and be used to the bottom of bottom surface dust stratification push-in ash bucket top inlet scraping hawk, it is described Scrape hawk and scrape ash driving motor equipped with the bottom being drivingly connected with it in bottom.

7. the flue gas treating system according to claim 1 suitable for thermal power plant, it is characterised in that the spray column Interior top is equipped with one or more layers water mist sprinkling pipe, and lower part is equipped with flue gas input port, and bottom is equipped with spray column water outlet, institute State water mist sprinkling pipe and be equipped with nozzle, the spray water inlet connection shower water input channel of the water mist sprinkling pipe, the spray The top of pipe is equipped with demister, spacing is left between the demister and the spray tube, the demister is by one layer Or multilayer baffle plate is formed, the top gas outlet of the spray column is equipped with tail gas air-introduced machine.

8. according to any flue gas treating systems suitable for thermal power plant of claim 1-7, it is characterised in that described It is additionally provided with the anti-blocking apparatus for ash of flue in flue, the anti-blocking apparatus for ash of flue includes being arranged on the shaft on flue cavity top and more The shaft is fixed or are rotatablely connected to a sideboard, the sideboard：

When by the way of being fixedly connected, the sideboard by shaft described in welding or pin connection, the shaft with just The rotating electric rotating machine of 90 ° of opposite direction is drivingly connected；

When by the way of rotation connection, the sideboard is drivingly connected by Multi-section positioner and electric rotating machine.

9. the flue gas treating system according to claim 8 suitable for thermal power plant, it is characterised in that the multistage is determined The positioning hop count of position device is no less than the quantity of the sideboard, and each sideboard is respectively equipped with respective shaft, described Sideboard is the defeated of the shaft of each sideboard by way of the Multi-section positioner is drivingly connected with electric rotating machine Enter end and be equipped with the location structure supporting with the Multi-section positioner, the output shaft of the electric rotating machine passes through shaft coupling or retarder The input terminal of the Multi-section positioner is connected, the positioning end of the Multi-section positioner is engaged with the location structure in each shaft.

10. the flue gas treating system according to claim 9 suitable for thermal power plant, it is characterised in that the active catch Plate is rotatably connected by connecting mechanism for rotating with its shaft, and is determined between the sideboard and its shaft equipped with adjustable rotary Position pin, the adjustable rotary positioning pin are installed on sideboard, in the corresponding shaft it is circumferentially distributed have it is multiple fixed Position hole.